EP3820649B1 - Torque screwdriver arrangement and method for operating a torque screwdriver arrangement of this kind - Google Patents

Torque screwdriver arrangement and method for operating a torque screwdriver arrangement of this kind Download PDF

Info

Publication number
EP3820649B1
EP3820649B1 EP20710077.7A EP20710077A EP3820649B1 EP 3820649 B1 EP3820649 B1 EP 3820649B1 EP 20710077 A EP20710077 A EP 20710077A EP 3820649 B1 EP3820649 B1 EP 3820649B1
Authority
EP
European Patent Office
Prior art keywords
screwdriver
housing
torque
arrangement
measuring device
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.)
Active
Application number
EP20710077.7A
Other languages
German (de)
French (fr)
Other versions
EP3820649A1 (en
Inventor
Andreas Ushakov
Andreas LAZAR
Marc UTZENRATH
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.)
Swedex Industrieprodukte GmbH
Original Assignee
Swedex Industrieprodukte 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 Swedex Industrieprodukte GmbH filed Critical Swedex Industrieprodukte GmbH
Publication of EP3820649A1 publication Critical patent/EP3820649A1/en
Application granted granted Critical
Publication of EP3820649B1 publication Critical patent/EP3820649B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/147Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose

Definitions

  • the present invention relates to a torque wrench arrangement with a screwdriver housing, a drive train arranged in the screwdriver housing, which has a drive housing, a motor arranged in the drive housing, in particular an electric motor, and an output shaft which protrudes from the drive housing on its axially front end face and its axial front end comprises a bit holder for fixing a screw bit or can be connected to one in a rotationally fixed manner, and a torque measuring device.
  • the present invention relates to a method for operating a torque wrench assembly.
  • Torque wrench assemblies for tightening and loosening screws are well known. Such torque wrench arrangements are increasingly provided with a torque measuring device for detecting the screw tightening torque.
  • a torque wrench assembly with a screwdriver housing and a drive train arranged in the screwdriver housing.
  • the drive train comprises a drive housing, an electric motor arranged in the drive housing with an output shaft, a gearbox also arranged in the drive housing and connected to the electric motor via its output shaft, and an output shaft of the gearbox, which protrudes from the drive housing on its axially front end face and its axial front end via a coupling mechanism with a bit holder for fixing a screw bit can be connected in a rotationally fixed manner.
  • the torque wrench assembly includes the EP 2 127 812 A1 a torque measuring device which is arranged in the axial direction of the drive train between the electric motor and the transmission. Specifically, in the area of the drive housing that surrounds the output shaft of the electric motor, strain gauges are applied to the outside of the drive housing, by means of which the screw tightening torque can be detected. As soon as the detected screw tightening torque reaches a predetermined value, the electric motor can be stopped accordingly. In addition, the area of the drive housing that surrounds the electric motor is firmly connected to the screwdriver housing. In this way, the reaction torque exerted on the drive housing is supported over a large area during operation of the torque wrench arrangement. Using the torque wrench assembly EP 2 127 812 A1 This means that only a very inaccurate measurement of the output and/or reaction torque is possible.
  • the present invention is based on the object of providing a torque wrench arrangement of the type mentioned at the outset, which enables the output torque of the output shaft to be recorded as precisely as possible and is also inexpensive to manufacture and operate.
  • the invention is therefore based on the idea of supporting a reaction torque exerted on the drive housing at exactly one support point between the drive housing and the screwdriver housing via a support arrangement and otherwise providing the drive housing in the screwdriver housing so that it can rotate in particular about a longitudinal axis of the drive train.
  • the output torque occurring on the output shaft is transmitted from the output shaft via a drive mechanism and the drive housing of the drive train to the support arrangement, where it can be detected as reaction torque.
  • the output torque is converted into a measurable rotational deflection of the support arrangement. Detecting the reaction torque is convenient because it is particularly important to measure the rotating output shaft, which is often associated with problems. can be dispensed with.
  • the torque measuring device can be connected to or attached to the support arrangement.
  • the support arrangement can include at least part of the torque measuring device.
  • the support arrangement is arranged between an axial end of the drive housing, preferably an axial end face of the drive housing, and the screwdriver housing, and the drive housing is in particular at its end axially opposite the support arrangement, preferably on the front side, via a bearing, in particular a rolling bearing , preferably a deep groove ball bearing, rotatably mounted in the screwdriver housing.
  • the entire drive train is rotatably mounted in the screwdriver housing via the rotatably mounted drive housing. This rotatable mounting of the drive housing contributes to stabilizing the drive housing within the screwdriver housing.
  • the reaction torque exerted on the drive housing is only supported at the axially opposite support point between the drive housing and the screwdriver housing via the support arrangement.
  • the support arrangement is between the axially front end of the drive housing, preferably the axial front face of the drive housing, and the screwdriver housing.
  • the reaction torque is supported and recorded relatively close to the output shaft, which contributes to the output torque being recorded as precisely as possible.
  • the support arrangement can be connected to the screwdriver housing via an intermediate element.
  • the intermediate element is detachably connected to the support arrangement and/or the screwdriver housing, in particular screwed.
  • the support arrangement can be connected to screwdriver housings of different geometries. Screw connections are known to have the advantage that they can be detached.
  • a further embodiment of the invention is characterized in that a coupling device is provided, via which a bit holder is connected to the output shaft, in particular the axially front end of the output shaft, in a rotationally fixed but axially displaceable manner relative to it.
  • the coupling device is connected to the output shaft, preferably releasably connected, in particular screwed, and the axially rear end of the bit holder is in rotationally fixed but axially displaceable engagement with the coupling device.
  • the bit holder can be guided in an axially displaceable manner at the axially front end of the screwdriver housing via a bearing arrangement which includes a bearing, in particular a plain bearing.
  • the coupling device can be surrounded by a coupling device housing which is arranged in the axially front end section of the screwdriver housing and is detachably connected to it, preferably screwed.
  • the coupling device housing can also be designed in one piece with the screwdriver housing.
  • Elastic restoring means such as a helical compression spring, disc spring and/or rubber spring, are expediently provided, which are located between the coupling device and Support the bit holder and push the bit holder into an axially forward starting position.
  • the elastic restoring means preferably encompass the bit holder in order to be supported on the inside by it.
  • the contact pressure exerted on the bit holder can be detected, for example with a suitable measuring device, and as soon as the detected contact pressure reaches or exceeds the value of a desired triggering force, the motor Switch on according to the torque wrench arrangement.
  • the support arrangement can be connected to the screwdriver housing via the coupling device housing as an intermediate element.
  • the drive housing is connected to the screwdriver housing at the support point via the support arrangement.
  • the support assembly may include drive housing connecting means designed and/or configured to releasably connect the support assembly to the drive housing.
  • the support arrangement can also be firmly connected to the drive housing.
  • the support arrangement can be welded, pressed and/or glued to the drive housing. It is also possible for the support arrangement to be formed in one piece with the drive housing.
  • the support arrangement can also include screwdriver housing connecting means which are designed and/or set up to connect the support arrangement, in particular releasably, to the screwdriver housing or to an intermediate element provided between the screwdriver housing and the support arrangement.
  • the support arrangement can also be designed in one piece with the intermediate element.
  • the torque measuring device is advantageously designed and/or set up to measure the reaction torque axially between the screwdriver housing connecting means and the drive housing connecting means.
  • the support arrangement advantageously comprises an annular, in particular annular, fastening flange, which has through holes between its two end faces, as a drive housing connecting means, via which the fastening flange is connected to an end face of the drive housing.
  • the annular fastening flange can be provided with material reinforcements projecting radially inwards, with a through hole preferably extending through each of these material reinforcements.
  • the annular fastening flange can have a uniform thickness measured in the radial direction.
  • the through holes are preferably arranged in particular evenly spaced apart from one another in the circumferential direction of the fastening flange.
  • the fastening flange is attached to the drive housing with a relatively uniform thickness in its circumferential direction. This can also contribute to the most precise detection of the output torque.
  • the through holes can each be designed as stepped bores with a drive housing-side section of smaller diameter and an adjoining section of larger diameter. This has the advantage, for example, that the head of a fastener extending through the stepped bore can be sunk into the larger diameter section of the stepped bore.
  • the support arrangement comprises a central through opening through which in particular a part of the output shaft extends and/or into which the output shaft in particular protrudes.
  • the support arrangement is designed as a torsionally elastic support arrangement and comprises a in particular the sleeve defining the central through opening of the support arrangement, on which the screwdriver housing connecting means are formed, and an outer ring having the drive housing connecting means, which is in particular formed by the fastening flange and which radially surrounds the sleeve.
  • the sleeve and the outer ring, in particular the fastening flange are preferably connected to one another in a torsionally elastic manner via radial connecting webs, preferably connected to one another exclusively via the radial connecting webs and are otherwise spaced apart from one another by a gap, in particular an air gap.
  • the gap can be at least partially filled with an elastic mass, thereby preventing contamination.
  • at least one connecting web comprises the torque measuring device or a part thereof, or at least one connecting web consists of the torque measuring device, or at least one connecting web is connected to the torque measuring device or a part thereof.
  • the sleeve and the outer ring are connected to one another exclusively via the connecting webs, because in this case the reaction torque is supported exclusively via the connecting webs, which is why the reaction torque is recorded particularly precisely by means of the torque measuring device on the connecting webs can.
  • connecting web between at least one pair of through holes adjacent in the circumferential direction of the fastening flange.
  • the two areas of the support arrangement, on which no connecting web is provided, are preferably radially opposite one another.
  • the sleeve is connected at an axial end region, in particular its axially rear end region, via the connecting webs to the outer ring, in particular the fastening flange, and at the opposite axial end region, in particular its axially front end region, is provided with an internal or external thread section as a screwdriver housing connecting means .
  • the torsionally elastic support arrangement can be in threaded engagement with a correspondingly designed internal or external thread section of the screwdriver housing or with an intermediate element provided between the torsionally elastic support arrangement and the screwdriver housing.
  • the corresponding internal or external thread section is provided in particular at the axially rear end of the intermediate section.
  • the sleeve is provided with an externally threaded section and the screwdriver housing or the intermediate element is provided with a correspondingly designed internally threaded section. Such a screw connection can be made and released quickly.
  • the side surfaces of the connecting webs pointing in the circumferential direction of the torsionally elastic support arrangement can be designed as planar surfaces.
  • the connecting webs can each have an at least substantially uniform thickness in the circumferential direction of the torsionally elastic support arrangement.
  • the connecting webs have a uniform or at least essentially uniform dimension. This makes it easier to calibrate the torque measuring device and/or the torque wrench arrangement.
  • the connecting webs are arranged evenly spaced apart from one another in the circumferential direction of the torsionally elastic support arrangement. This is particularly advantageous if the torque measuring device or Parts of it are integrated into the connecting webs or attached to them, so the reaction torque is measured on the connecting webs. In this case, the output torque can be recorded particularly precisely due to the measuring points evenly distributed along the circumference of the torsionally elastic connecting element.
  • the torque measuring device comprises at least one strain gauge, which is arranged and / or connected in such a way that a torque can be measured, and which is preferably based on the principle of the Wheatstone bridge to one or more quarter, half and / or Full bridges are connected.
  • Several bridges can be connected in series, parallel and/or mixed. Stretching and compressing deformations can be measured using strain gauges. Strain gauges change their electrical resistance even with small deformations.
  • the strain gauge(s) is or are expediently designed and/or arranged and/or connected in such a way that they each change their electrical resistance in the event of a deformation caused by a reaction torque and this change in resistance can be measured and the acting torque can in turn be derived from this.
  • the at least one strain gauge is applied to a side surface of a connecting web pointing in the circumferential direction of the torsionally elastic support arrangement.
  • at least one strain gauge is applied to the side surfaces of the connecting webs pointing in the circumferential direction of the torsionally elastic support arrangement.
  • a further embodiment of the invention is characterized in that the support arrangement has a drive housing-side support element, on which the drive housing connecting means are provided, and a screwdriver housing-side support element, on which the screwdriver housing connecting means are provided.
  • one of the two support elements can be provided with at least one recess and the other support element can be provided with at least one correspondingly designed projection projecting into the recess, a gap being formed between two opposite side surfaces of a recess and an associated projection pointing in the circumferential direction of the support arrangement is, and the arrangement is such that the reaction torque is supported in the circumferential direction of the support arrangement between the side surfaces.
  • a part of the torque measuring device in particular at least one piezo element and/or piezoelectric sensor and/or piezoresistive sensor of the torque measuring device, is arranged in at least one gap.
  • the part of the torque measuring device can be arranged in such a way, preferably attached to at least one of the two side surfaces, that when the width of the gap is reduced when the two support elements are rotated relative to one another, pressure is exerted on the part of the torque measuring device arranged in the gap can be detected as an electrical signal.
  • the electrical signal can be detected in particular by means of control electronics.
  • the drive housing-side support element is designed as an annular fastening flange and/or the screwdriver housing-side support element is designed as an annular plate.
  • the at least one projection or the at least one recess can be arranged on the end face of the annular plate facing the drive housing-side support element.
  • On the opposite end face of the annular plate there can be a sleeve-like extension, which is arranged in particular coaxially with a central bore in the annular plate.
  • the bore and the extension of the annular plate preferably form part of a central through opening of the support arrangement, through which in particular a part of the output shaft extends and/or into which the output shaft projects.
  • the sleeve-like extension can be provided with an internal or external thread section as a screwdriver housing connecting means, via which the screwdriver housing-side support element is in threaded engagement with a correspondingly designed internal or external thread section of the screwdriver housing or an intermediate element provided between the screwdriver housing-side support element and the screwdriver housing.
  • the torque measuring device comprises at least one sensor, such as a resistance sensor and/or an electromagnetic sensor and/or a Hall sensor and/or a magnetoresistive sensor and/or a galvanomagnetic sensor and/or an optoelectronic sensor and/or a piezo element and/or a piezoelectric sensor and/or a piezoresistive sensor.
  • a resistance sensor and/or an electromagnetic sensor and/or a Hall sensor and/or a magnetoresistive sensor and/or a galvanomagnetic sensor and/or an optoelectronic sensor and/or a piezo element and/or a piezoelectric sensor and/or a piezoresistive sensor such as a resistance sensor and/or an electromagnetic sensor and/or a Hall sensor and/or a magnetoresistive sensor and/or a galvanomagnetic sensor and/or an optoelectronic sensor and/or a piezo element and/or a piezoelectric sensor and/or a piezoresistive sensor
  • the torque measuring device can also include a sensor that is designed and/or set up to measure a twist angle and/or a position and/or a deformation and/or a twist and/or a rotation and/or a torsion and/or a shear force and/or to detect shearing of the particularly torsionally elastic support arrangement, in particular a region of the support arrangement, and/or of the drive housing.
  • a sensor that is designed and/or set up to measure a twist angle and/or a position and/or a deformation and/or a twist and/or a rotation and/or a torsion and/or a shear force and/or to detect shearing of the particularly torsionally elastic support arrangement, in particular a region of the support arrangement, and/or of the drive housing.
  • a further embodiment of the invention is characterized in that the torque measuring device comprises at least two measuring device elements which are designed and/or arranged in such a way that during a rotational deflection of the particularly torsionally elastic support arrangement be moved relative to each other.
  • at least one measuring device element is a sensor or part of a sensor.
  • the sensor can be, for example, one of the sensors listed previously.
  • the measuring device elements are particularly preferably a magnetic field generating element and a magnetic field measuring element.
  • a Hall sensor and/or a magnetoresistive element for example, can be used as a magnetic field measuring element.
  • the use of magnetic field generating and magnetic field measuring elements enables particularly precise detection of the output torque compared to other possible measuring device elements.
  • magnetic field generating and magnetic field measuring elements can be installed relatively easily.
  • a measuring device element of the torque measuring device is preferably arranged on a radially outer surface of the sleeve, in particular mounted on a pedestal.
  • the measuring device element is arranged on a radially outer surface of the axial end region of the sleeve, on which the sleeve is connected to the outer ring via the connecting webs, in particular mounted on a pedestal.
  • a further measuring device element of the torque measuring device is preferably arranged on a radially inner surface of the outer ring, preferably of the annular fastening flange, in particular mounted on a pedestal.
  • the arrangement of one measuring device element on the sleeve and the other measuring device element on the outer ring can of course also be reversed.
  • the two measuring device elements of the torque measuring device lie opposite each other, but in particular do not touch each other.
  • the torque measuring device can be designed and/or set up to in order to detect a displacement of its two measuring device elements in the circumferential direction of the torsionally elastic support arrangement relative to one another when the sleeve and the outer ring, in particular the fastening flange, are rotated against one another.
  • An arrangement of two opposing measuring device elements of the torque measuring device can be provided instead of a connecting web.
  • the arrangement can be positioned in the circumferential direction of the torsionally elastic support arrangement, in particular between two adjacent through holes in the fastening flange.
  • no connecting web is provided in a region of the torsionally elastic support arrangement that is directly radially opposite the arrangement.
  • the drive train has a transmission which connects to the axially front end of the motor and is arranged in the drive housing.
  • the drive housing can be designed in two parts, with the motor being arranged in a first, in particular axially rear, part of the drive housing and the gearbox being arranged in a second, in particular axially front, part of the drive housing.
  • the drive housing can be separated from the screwdriver housing in the radial direction by a gap, in particular an air gap. This supports the rotatable storage of the drive housing in the screwdriver housing.
  • a further embodiment of the invention is characterized in that control electronics are provided which are coupled to the torque measuring device and the motor in order to switch off the motor depending on output signals from the torque measuring device.
  • the motor of the torque wrench arrangement can therefore be switched off automatically as soon as a predetermined target torque is reached is exceeded, whereby damage to a screw connection produced by means of the torque screwdriver arrangement is avoided.
  • the control electronics can be internal control electronics arranged on the screwdriver housing, in particular at least partially, possibly completely within the screwdriver housing, external control electronics arranged remotely from the screwdriver housing and/or a higher-level controller.
  • control electronics can have a memory, in particular a RAM memory, for storing several predefined target torques and / or a user interface or a setting and / or input means, in particular a touch-sensitive screen, a jog wheel and / or a membrane keyboard, for setting a particular target torque stored in the memory.
  • a memory in particular a RAM memory
  • the torque of the motor can be adjusted and/or stored via a potentiometer, in particular directly on an electric screwdriver of the torque screwdriver arrangement.
  • the Figures 1 to 9 show a torque wrench assembly 1 according to a first embodiment of the present invention.
  • the torque screwdriver arrangement 1 has an electric screwdriver 2 and external control electronics 3a connected to it.
  • the electric screwdriver 2 includes a screwdriver housing 4, which consists of an axially front housing section 4a, a middle housing section 4b and an axially rear housing section 4c.
  • the electric screwdriver 2 has a drive train 5 arranged in the middle and axially front housing sections 4a, 4b of the screwdriver housing 4.
  • This has a two-part drive housing 7 separated in the radial direction by a gap 6, here an air gap, from the screwdriver housing 4, a motor 8 in the form of an electric motor arranged in an axially rear part 7a of the drive housing 7, a motor 8 in the form of an electric motor in an axially front part 7b of the screwdriver housing 4
  • Drive housing 7 arranged and connected to the motor 8 gear 9, and an output shaft 10 of the gear 9.
  • the output shaft 10 protrudes from the drive housing 7 on its axially front end.
  • the axially front end of the output shaft 10 is connected in a rotationally fixed manner to a bit holder 11 with a bit holder 12 for fixing a screw bit, not shown.
  • the electric screwdriver 2 comprises a torsionally elastic support arrangement 13, which is provided at exactly one support point 14 and via which the reaction torque exerted on the drive housing 7 during operation of the torque screwdriver arrangement 1 is supported on the screwdriver housing 4.
  • the drive housing 7 is connected to the screwdriver housing 4 at the support point 14 via the torsionally elastic support arrangement 13 and is otherwise rotatable in the screwdriver housing 4.
  • the torsionally elastic support arrangement 13 is arranged between the axially front end face of the drive housing 7 and the screwdriver housing 4 and the drive housing 7 is rotatably mounted in the screwdriver housing 4 on its axially rear end face, in this case via a roller bearing, here a deep groove ball bearing 15.
  • the electric screwdriver 2 is equipped with a torque measuring device 16 with eight strain gauges 16a.
  • the torque measuring device 16 is designed and/or set up in order to detect the output torque of the output shaft 10 in the form of the supported reaction torque on the torsionally elastic support arrangement 13.
  • the electric screwdriver 2 includes a coupling device 17, via which the bit holder 11 is connected to the axially front end of the output shaft 10 in a rotationally fixed manner but is axially displaceable relative to it.
  • the axially rear end of the bit holder 11 is in rotationally fixed but axially displaceable engagement with the coupling device 17.
  • the bit holder 11 is guided in an axially displaceable manner at the axially front end of the screwdriver housing 4 via a bearing arrangement 18 comprising a plain bearing.
  • the coupling device 17 is detachably connected to the output shaft 10.
  • the coupling device 17 is surrounded by a coupling device housing 19, which is arranged in the axially front housing section 4a of the screwdriver housing 4 and is releasably connected to it, more precisely screwed at a screw connection point 20.
  • the bit holder 11 is pressed into an axially forward starting position by elastic restoring means 21 in the form of a helical compression spring.
  • the helical compression spring is supported axially between a front end face of the coupling device 17 and a rear end face of the bit holder 11, being placed on the axially rear end section of the bit holder 11 so that it surrounds it and is supported on the inside by it.
  • the torsionally elastic support arrangement 13 has an outer ring formed by an annular fastening flange 22.
  • the fastening flange 22 is provided between its two end faces with four through holes 23 as drive housing connecting means, via which the fastening flange 22 is detachably connected to the axially front end face of the drive housing 7.
  • the through holes 23 extend each through an area of the fastening flange 22, on which the latter is reinforced by means of material reinforcements projecting radially inwards.
  • the fastening flange 22 is screwed to the drive housing 7 by means of fastening screws 24, which extend through the through holes 23.
  • the through holes 23 are arranged evenly spaced apart from one another in the circumferential direction of the fastening flange 22 and are designed as stepped holes with a drive housing-side section 23a of smaller diameter and an adjoining section 23b of larger diameter.
  • the screw heads 25 of the fastening screws 24 are each sunk in one of the larger diameter sections 23a.
  • the torsionally elastic support arrangement 13 comprises a sleeve 26, which defines a central through opening 27 of the torsionally elastic support arrangement 13, through which the output shaft 10 extends.
  • the sleeve 26 is surrounded radially by the fastening flange 22 and is connected at its axially rear end region to the fastening flange 22 via four radial connecting webs 28.
  • the sleeve 26 can be connected to the fastening flange 22 via any number of connecting webs 28.
  • the sleeve 26 and the fastening flange 22 are connected to one another exclusively via the connecting webs 28 and are otherwise spaced apart from one another by a gap 29, here an air gap.
  • the gap 29 can be at least partially filled with an elastic mass.
  • An off-center arrangement of the connecting webs 28 is also possible.
  • the connecting webs 28 are arranged evenly spaced apart from one another in the circumferential direction of the torsionally elastic support arrangement 13.
  • the connecting webs 28 each have one in the circumferential direction of the torsionally elastic support arrangement 13 uniform thickness. In general, however, the thickness does not have to be uniform.
  • the side surfaces 30 of the connecting webs 28 pointing in the circumferential direction of the torsionally elastic support arrangement 13 are designed as planar surfaces.
  • the sleeve 26 is provided at its axially front end region with an externally threaded section 31 as a screwdriver housing connecting means. Via the external thread section 31, the sleeve 26 is in threaded engagement with a correspondingly designed internal thread section 32 at the axially rear end of the coupling device housing 19. In this way, the torsionally elastic support arrangement 13 is connected to the screwdriver housing 4 via the coupling device housing 19 as an intermediate element.
  • the torque measuring device 16 is connected to the torsionally elastic support arrangement 13 and is designed and/or set up to detect the reaction torque axially between the screwdriver housing connecting means and the drive housing connecting means.
  • a strain gauge 16a is applied to each side surface 30 of the connecting webs 28.
  • the strain gauges 16a are connected in such a way that a reaction torque can be measured.
  • a single strain gauge 16a can be provided, which is applied to a side surface 30 of one of the connecting webs 28.
  • the electric screwdriver 2 has internal control electronics 3b, which together with the external control electronics 3a are referred to as control electronics 3 of the screwdriver arrangement 1.
  • the internal control electronics 3b is arranged within the axially rear housing section 4c of the screwdriver housing 4.
  • the external one Control electronics 3a is located outside the electric screwdriver 2 and includes a memory 33 with predefined target torques stored therein and a user interface 34 in the form of a touch-sensitive screen.
  • the internal control electronics 3b is connected to the external control electronics 3a at the axially rear end of the screwdriver housing 4 via a transmission line 35.
  • the control electronics 3 is coupled to the torque measuring device 16 and the motor 8 in order to switch off the motor 8 depending on output signals from the torque measuring device 16.
  • the torque wrench arrangement 1 only has internal control electronics 3b and no external control electronics 3a.
  • the internal control electronics 3b can also take over the tasks of the external control electronics 3a.
  • the internal control electronics 3b can include the memory 33 and/or the user interface 34.
  • Figure 10 shows a torsionally elastic support arrangement 13 of a torque wrench arrangement 1 according to a second embodiment of the present invention.
  • the second embodiment is essentially identical to the first embodiment, which is why only the differences between the second embodiment and the first embodiment will be discussed below.
  • the second embodiment differs from the first embodiment only in a slightly modified design of the torsionally elastic support arrangement 13. This is because the sleeve 26 of the torsionally elastic support arrangement 13 is connected at its axially rear end region to the fastening flange 22 of the torsionally elastic support arrangement 13 only via two instead of four radial connecting webs 28 tied together.
  • the two connecting webs 28 lie radially opposite one another. Between two pairs of in No connecting webs 28 are therefore provided in the circumferential direction of the fastening flange 22 adjacent through holes 23. These areas without connecting webs 28 are also radially opposite one another.
  • the torque measuring device 16 does not include any strain gauges 16a, but instead two measuring device elements, which are a magnetic field generating element, here a magnet 16b, and a magnetic field measuring element, here a Hall sensor 16c.
  • the magnet 16b is mounted on a radially outer surface 36 of the sleeve 26 on a pedestal 37 and the Hall sensor 16c is mounted on a radially inner surface 38 of the annular fastening flange 22 on a further pedestal 39.
  • the magnet 16b can be arranged mounted on the surface 38 and the Hall sensor 16c on the surface 36 on a respective pedestal 37, 39.
  • the magnet 16b and the Hall sensor 16c are directly opposite each other, but do not touch each other.
  • the arrangement of the two platforms 37, 39, the magnet 16c and the Hall sensor 16c is located at a position at which a further connecting web 28 is provided in the first embodiment.
  • the Figures 11 and 12 show a support arrangement 13 of a torque wrench arrangement 1 according to a third embodiment of the present invention.
  • the third embodiment is essentially identical to the first and second embodiments, which is why only the differences between the third embodiment and the first and second embodiments will be discussed below.
  • the third embodiment differs from the first and second embodiments only in a modified design of the support arrangement 13.
  • this consists of two separate elements, which is why the drive housing 7 over the support arrangement 13 is not connected to the screwdriver housing 4.
  • the support arrangement 13 has a drive housing-side support element 40 and a screwdriver housing-side support element 41, which rest against one another with their mutually facing end faces 43, 46.
  • the drive housing-side support element 40 is designed as an annular fastening flange 22 with four through holes 23 as drive housing connecting means and a central hole 42.
  • the drive housing-side support element 40 is provided with a recess 44 on its end face 43 facing the screwdriver housing-side support element 41.
  • the screwdriver housing-side support element 41 is designed as an annular plate 45, on whose end face 46 facing the drive housing-side support element 40 there is a projection 47 which is designed to correspond to the recess 44 and projects into it.
  • the central bore 50 of the annular plate 45, the extension 49 and the central bore 42 of the fastening flange 22 form the central through opening 27 of the support arrangement 13.
  • the sleeve-like extension 49 is provided with an external thread section 51 as a screwdriver housing connecting means, via which the screwdriver housing-side support element 41 is in threaded engagement with the correspondingly designed internal thread section 32 at the axially rear end of the coupling device housing 19.
  • a gap 53 is formed between two opposite side surfaces 52 of the recess 44 and the projection 47, which point in the circumferential direction of the support arrangement 13.
  • the arrangement is such that the support of the reaction torque in the circumferential direction of the support arrangement 13 between the side surfaces 52 takes place.
  • Piezo elements 16d are therefore provided on the support arrangement 13 according to the third embodiment instead of strain gauges 16a or instead of a magnet 16b and a Hall sensor 16c. More precisely, the two piezo elements 16d are each attached to a side surface 52 of a gap 53 belonging to the support element 40 on the drive housing side.
  • the Figures 13 and 14 show schematic partial sectional views of the torque wrench assembly 1 according to the first, second and third embodiments. These are only intended to clarify the location of the support point 14.
  • the support point 14 is located at the axially front end of the drive housing 7.
  • the support arrangement 13 is arranged between the axially front end face of the drive housing 7 and the screwdriver housing 4.
  • Figure 15 shows a schematic partial sectional view of a torque wrench assembly 1 according to a fourth embodiment of the present invention.
  • the fourth embodiment differs from the first, second and third embodiments in that the support point 14 is located at the axially rear end of the drive housing 7.
  • the support arrangement 13, via which the reaction torque exerted on the drive housing 7 is supported at the support point 14 on the screwdriver housing 4, is, for example, one of the support arrangements 13 described in connection with the first three embodiments
  • the drive housing 7 is rotatably mounted in the screwdriver housing 4 at its axially front end.
  • the torque wrench arrangement 1 according to the invention according to the four embodiments described above can be operated according to the method explained below.
  • a user can first set a desired target torque via the user interface 34 by entering the desired target torque or selecting from several predefined selection options stored in the memory 33.
  • the screwdriver 2 is then pressed by the user against a screw to be turned using a screw bit fixed in the bit holder 12 of the bit holder 11 and the screwdriver 2 is activated either automatically when a desired contact pressure is reached or manually by the user, i.e. the motor 8 is switched on .
  • the screw bit nor the screw are shown in the figures.
  • the output torque of the output shaft 10 causes a reaction torque to be exerted on the drive housing 7, which is supported at the support point between the drive housing 7 and the screwdriver housing 4 via the support arrangement 13.
  • the output torque of the output shaft 10 is recorded in the form of the supported reaction torque on the support arrangement 13.
  • the torque is detected by measuring a deformation of the torsionally elastic support arrangement 13, in particular the connecting webs 28 or the fastening flange 22.
  • the torque is detected by measuring a displacement and/or rotation of the magnet 16b and the Hall sensor 16c in the circumferential direction of the torsionally elastic support arrangement 13 relative to one another during a rotational deflection of the torsionally elastic support arrangement 13, i.e. a rotation of the sleeve 26 and the fastening flange 22 against one another
  • a rotational deflection of the torsionally elastic support arrangement 13 i.e. a rotation of the sleeve 26 and the fastening flange 22 against one another
  • the third embodiment of the invention i.e.
  • the torque is detected by applying pressure to the support elements 40, 41 arranged in the gap 53 when the width of a gap 53 is reduced and the two support elements 40, 41 are rotated relative to one another Pizeoelement 16d is exerted, which can be detected as an electrical signal.
  • the output torque can be recorded much more precisely via the reaction torque compared to previously known torque wrench arrangements. If necessary, the measurement can be compared with a recorded motor current of the motor 8.
  • the detected reaction torque is then compared with the preset desired target torque by means of the control electronics 3. As soon as the target torque is reached or exceeded, the control electronics 3 causes the motor 8 to be switched off automatically. In this way, damage to a screw connection produced by means of the torque wrench arrangement 1 can be avoided.
  • the torque wrench arrangement 1 can be calibrated, in particular via the control electronics 3.
  • a certified measuring method is used, which is compared with the measured values recorded from the screwdriver 2. Depending on the extent of the deviation in the measured values, the measured values recorded by the screwdriver 2 are then adjusted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Description

Die vorliegende Erfindung betrifft eine Drehmomentschrauberanordnung mit einem Schraubendrehergehäuse, einem in dem Schraubendrehergehäuse angeordneten Antriebsstrang, der ein Antriebsgehäuse, einen in dem Antriebsgehäuse angeordneten Motor, insbesondere einen Elektromotor, und eine Abtriebswelle aufweist, die aus dem Antriebsgehäuse an dessen axial vorderer Stirnseite herausragt und deren axial vorderes Ende einen Bithalter zur Fixierung eines Schraubbits umfasst oder mit einem solchen drehfest verbindbar ist, und einer Drehmomentmesseinrichtung. Darüber hinaus betrifft die vorliegende Erfindung ein Verfahren zum Betrieb einer Drehmomentschrauberanordnung.The present invention relates to a torque wrench arrangement with a screwdriver housing, a drive train arranged in the screwdriver housing, which has a drive housing, a motor arranged in the drive housing, in particular an electric motor, and an output shaft which protrudes from the drive housing on its axially front end face and its axial front end comprises a bit holder for fixing a screw bit or can be connected to one in a rotationally fixed manner, and a torque measuring device. In addition, the present invention relates to a method for operating a torque wrench assembly.

Drehmomentschrauberanordnungen zum Anziehen und Lösen von Schrauben sind allgemein bekannt. Solche Drehmomentschrauberanordnungen sind immer häufiger mit einer Drehmomentmesseinrichtung zur Erfassung des Schraubenanzugsdrehmoments versehen. Beispielsweise offenbart die EP 2 127 812 A1 eine Drehmomentschrauberanordnung mit einem Schraubendrehergehäuse und einem in dem Schraubendrehergehäuse angeordneten Antriebsstrang. Der Antriebsstrang umfasst ein Antriebsgehäuse, einen in dem Antriebsgehäuse angeordneten Elektromotor mit einer Ausgangswelle, ein ebenfalls in dem Antriebsgehäuse angeordnetes und mit dem Elektromotor über dessen Ausgangswelle verbundenes Getriebe, und eine Abtriebswelle des Getriebes, die aus dem Antriebsgehäuse an dessen axial vorderer Stirnseite herausragt und deren axial vorderes Ende über einen Kupplungsmechanismus mit einem Bithalter zur Fixierung eines Schraubbits drehfest verbindbar ist. Außerdem umfasst die Drehmomentschrauberanordnung der EP 2 127 812 A1 eine Drehmomentmesseinrichtung, die in Axialrichtung des Antriebsstrangs zwischen dem Elektromotor und dem Getriebe angeordnet ist. Konkret sind in dem Bereich des Antriebsgehäuses, der die Ausgangswelle des Elektromotors umgibt, Dehnungsmessstreifen auf der Außenseite des Antriebsgehäuses aufgebracht, mittels denen das Schraubenanzugsdrehmoment erfassbar ist. Sobald das erfasste Schraubenanzugsdrehmoment einen vorbestimmten Wert erreicht, kann der Elektromotor entsprechend gestoppt werden. Darüber hinaus ist der Bereich des Antriebsgehäuses, der den Elektromotor umgibt, fest mit dem Schraubendrehergehäuse verbunden. Auf diese Weise wird während eines Betriebs der Drehmomentschrauberanordnung das auf das Antriebsgehäuse ausgeübte Reaktions-Drehmoment großflächig abgestützt. Mittels der Drehmomentschrauberanordnung der EP 2 127 812 A1 ist somit nur eine sehr ungenaue Erfassung des Abtriebs- und/oder Reaktions-Drehmoments möglich.Torque wrench assemblies for tightening and loosening screws are well known. Such torque wrench arrangements are increasingly provided with a torque measuring device for detecting the screw tightening torque. For example, the reveals EP 2 127 812 A1 a torque wrench assembly with a screwdriver housing and a drive train arranged in the screwdriver housing. The drive train comprises a drive housing, an electric motor arranged in the drive housing with an output shaft, a gearbox also arranged in the drive housing and connected to the electric motor via its output shaft, and an output shaft of the gearbox, which protrudes from the drive housing on its axially front end face and its axial front end via a coupling mechanism with a bit holder for fixing a screw bit can be connected in a rotationally fixed manner. In addition, the torque wrench assembly includes the EP 2 127 812 A1 a torque measuring device which is arranged in the axial direction of the drive train between the electric motor and the transmission. Specifically, in the area of the drive housing that surrounds the output shaft of the electric motor, strain gauges are applied to the outside of the drive housing, by means of which the screw tightening torque can be detected. As soon as the detected screw tightening torque reaches a predetermined value, the electric motor can be stopped accordingly. In addition, the area of the drive housing that surrounds the electric motor is firmly connected to the screwdriver housing. In this way, the reaction torque exerted on the drive housing is supported over a large area during operation of the torque wrench arrangement. Using the torque wrench assembly EP 2 127 812 A1 This means that only a very inaccurate measurement of the output and/or reaction torque is possible.

Aus der GB 2 108 272 A ist eine Drehmomentschrauberanordnung nach dem Oberbegriff von Anspruch 1 offenbart.From the GB 2 108 272 A a torque wrench assembly according to the preamble of claim 1 is disclosed.

Vor diesem Hintergrund liegt der vorliegenden Erfindung die Aufgabe zugrunde, eine Drehmomentschrauberanordnung der eingangs genannten Art bereitzustellen, die eine möglichst präzise Erfassung des Abtriebs-Drehmoments der Abtriebswelle ermöglicht und noch dazu kostengünstig herzustellen und zu betreiben ist.Against this background, the present invention is based on the object of providing a torque wrench arrangement of the type mentioned at the outset, which enables the output torque of the output shaft to be recorded as precisely as possible and is also inexpensive to manufacture and operate.

Diese Aufgabe wird erfindungsgemäß bei einer Drehmomentschrauberanordnung nach Anspruch 1 gelöst.This object is achieved according to the invention in a torque wrench arrangement according to claim 1.

Der Erfindung liegt somit die Überlegung zugrunde, ein auf das Antriebsgehäuse ausgeübtes Reaktions-Drehmoment an genau einer Abstützstelle zwischen dem Antriebsgehäuse und dem Schraubendrehergehäuse über eine Abstützanordnung abzustützen und das Antriebsgehäuse ansonsten insbesondere um eine Längsachse des Antriebsstrangs drehbar im Schraubendrehergehäuse vorzusehen. Während eines Betriebs der erfindungsgemäßen Drehmomentschrauberanordnung wird das an der Abtriebswelle anfallende Abtriebs-Drehmoment von der Abtriebswelle über eine Antriebsmechanik und das Antriebsgehäuse des Antriebsstrangs an die Abstützanordnung übertragen, an der es als Reaktions-Drehmoment erfassbar ist. Beispielsweise wird das Abtriebs-Drehmoment in eine messbare rotatorische Auslenkung der Abstützanordnung umgewandelt. Eine Erfassung des Reaktions-Drehmoments ist komfortabel, da insbesondere auf eine Messung an der sich drehenden Abtriebswelle, die häufig mit Problemen verbunden ist, verzichtet werden kann. Die Drehmomentmesseinrichtung kann mit der Abstützanordnung verbunden beziehungsweise daran befestigt sein. Grundsätzlich ist es auch möglich, dass die Abstützanordnung zumindest einen Teil der Drehmomentmesseinrichtung umfasst. Indem das Reaktions-Drehmoment unmittelbar an der Abstützanordnung und somit an der einzigen Abstützstelle des Reaktions-Drehmoments erfasst wird, lässt sich das Abtriebs-Drehmoment der Abtriebswelle über das Reaktions-Drehmoment verglichen mit der vorbekannten Drehmomentschrauberanordnung deutlich präziser erfassen. Außerdem lässt sich die erfindungsgemäße Drehmomentschrauberanordnung kostengünstig herstellen und betreiben. Darüber hinaus bietet die erfindungsgemäße Drehmomenterfassung an der Abstützanordnung gegenüber einer Drehmomenterfassung mittels einer Erfassung des Motorstroms den Vorteil einer erhöhten Messgenauigkeit und der Möglichkeit zum Messen höherer Drehzahlen.The invention is therefore based on the idea of supporting a reaction torque exerted on the drive housing at exactly one support point between the drive housing and the screwdriver housing via a support arrangement and otherwise providing the drive housing in the screwdriver housing so that it can rotate in particular about a longitudinal axis of the drive train. During operation of the torque wrench arrangement according to the invention, the output torque occurring on the output shaft is transmitted from the output shaft via a drive mechanism and the drive housing of the drive train to the support arrangement, where it can be detected as reaction torque. For example, the output torque is converted into a measurable rotational deflection of the support arrangement. Detecting the reaction torque is convenient because it is particularly important to measure the rotating output shaft, which is often associated with problems. can be dispensed with. The torque measuring device can be connected to or attached to the support arrangement. In principle, it is also possible for the support arrangement to include at least part of the torque measuring device. By detecting the reaction torque directly at the support arrangement and thus at the only support point of the reaction torque, the output torque of the output shaft can be detected much more precisely via the reaction torque compared to the previously known torque screwdriver arrangement. In addition, the torque wrench arrangement according to the invention can be manufactured and operated cost-effectively. In addition, the torque detection according to the invention on the support arrangement offers the advantage of increased measurement accuracy and the possibility of measuring higher speeds compared to torque detection by detecting the motor current.

Gemäß einer Ausgestaltung der Erfindung ist die Abstützanordnung zwischen einem axialen Ende des Antriebsgehäuses, bevorzugt einer axialen Stirnseite des Antriebsgehäuses, und dem Schraubendrehergehäuse angeordnet, und ist das Antriebsgehäuse insbesondere an seinem der Abstützanordnung axial gegenüberliegenden Ende, bevorzugt stirnseitig, über ein Lager, insbesondere ein Wälzlager, bevorzugt ein Rillenkugellager, drehbar im Schraubendrehergehäuse gelagert. Über das drehbar gelagerte Antriebsgehäuse ist insbesondere der gesamte Antriebsstrang drehbar im Schraubendrehergehäuse gelagert. Diese drehbare Lagerung des Antriebsgehäuses trägt zur Stabilisierung des Antriebsgehäuses innerhalb des Schraubendrehergehäuses bei. Gleichzeitig wird das auf das Antriebsgehäuse ausgeübte Reaktions-Drehmoment lediglich an der axial gegenüberliegenden Abstützstelle zwischen dem Antriebsgehäuse und dem Schraubendrehergehäuse über die Abstützanordnung abgestützt. Beispielsweise ist die Abstützanordnung zwischen dem axial vorderen Ende des Antriebsgehäuses, bevorzugt der axial vorderen Stirnseite des Antriebsgehäuses, und dem Schraubendrehergehäuse angeordnet. In diesem Fall erfolgt die Abstützung und Erfassung des Reaktions-Drehmoments relativ nahe an der Abtriebswelle, was zu einer möglichst präzisen Erfassung des Abtriebs-Drehmoments beiträgt.According to one embodiment of the invention, the support arrangement is arranged between an axial end of the drive housing, preferably an axial end face of the drive housing, and the screwdriver housing, and the drive housing is in particular at its end axially opposite the support arrangement, preferably on the front side, via a bearing, in particular a rolling bearing , preferably a deep groove ball bearing, rotatably mounted in the screwdriver housing. In particular, the entire drive train is rotatably mounted in the screwdriver housing via the rotatably mounted drive housing. This rotatable mounting of the drive housing contributes to stabilizing the drive housing within the screwdriver housing. At the same time, the reaction torque exerted on the drive housing is only supported at the axially opposite support point between the drive housing and the screwdriver housing via the support arrangement. For example, the support arrangement is between the axially front end of the drive housing, preferably the axial front face of the drive housing, and the screwdriver housing. In this case, the reaction torque is supported and recorded relatively close to the output shaft, which contributes to the output torque being recorded as precisely as possible.

Die Abstützanordnung kann mit dem Schraubendrehergehäuse über ein Zwischenelement verbunden sein. Bevorzugt ist das Zwischenelement mit der Abstützanordnung und/oder dem Schraubendrehergehäuse lösbar verbunden, insbesondere verschraubt. Durch den Einsatz eines geeigneten Zwischenelementes lässt sich die Abstützanordnung mit Schraubendrehergehäusen unterschiedlicher Geometrien verbinden. Schraubverbindungen haben bekanntermaßen den Vorteil, dass sie lösbar sind.The support arrangement can be connected to the screwdriver housing via an intermediate element. Preferably, the intermediate element is detachably connected to the support arrangement and/or the screwdriver housing, in particular screwed. By using a suitable intermediate element, the support arrangement can be connected to screwdriver housings of different geometries. Screw connections are known to have the advantage that they can be detached.

Eine weitere Ausgestaltung der Erfindung zeichnet sich dadurch aus, dass eine Kupplungseinrichtung vorgesehen ist, über die ein Bithalter mit der Abtriebswelle, insbesondere dem axial vorderen Ende der Abtriebswelle, drehfest aber relativ zu dieser axial verschiebbar verbunden ist. Hierbei ist die Kupplungseinrichtung mit der Abtriebswelle verbunden, bevorzugt lösbar verbunden, insbesondere verschraubt, und steht das axial hintere Ende des Bithalters mit der Kupplungseinrichtung in drehfestem, aber axial verschiebbaren Eingriff. Der Bithalter kann am axial vorderen Ende des Schraubendrehergehäuses über eine Lageranordnung, die ein Lager, insbesondere Gleitlager, umfasst, axial verschiebbar geführt sein. Die Kupplungseinrichtung kann von einem Kupplungseinrichtungsgehäuse umgeben sein, das in dem axial vorderen Endabschnitt des Schraubendrehergehäuses angeordnet und mit diesem lösbar verbunden, bevorzugt verschraubt ist. Grundsätzlich kann das Kupplungseinrichtungsgehäuse aber auch einteilig mit dem Schraubendrehergehäuse ausgebildet sein. Zweckmäßigerweise sind elastische Rückstellmittel, wie etwa eine Schraubendruckfeder, Tellerfeder und/oder Gummifeder vorgesehen, welche sich zwischen der Kupplungseinrichtung und dem Bithalter abstützen und den Bithalter in eine axial vordere Ausgangslage drücken. Bevorzugt umgreifen die elastischen Rückstellmittel den Bithalter, um durch diesen innenseitig abgestützt zu werden. Dadurch, dass der Bithalter gegen die Rückstellkraft der elastischen Rückstellmittel relativ zu der Abtriebswelle axial verschiebbar ist, lässt sich beispielsweise mit einer geeigneten Messvorrichtung die auf den Bithalter ausgeübte Anpresskraft erfassen, und sobald die erfasste Anpresskraft den Wert einer gewünschten Auslösekraft erreicht oder überschreitet, der Motor der Drehmomentschrauberanordnung entsprechend einschalten. Falls ein Zwischenelement vorgesehen ist, kann die Abstützanordnung mit dem Schraubendrehergehäuse über das Kupplungseinrichtungsgehäuse als Zwischenelement verbunden sein.A further embodiment of the invention is characterized in that a coupling device is provided, via which a bit holder is connected to the output shaft, in particular the axially front end of the output shaft, in a rotationally fixed but axially displaceable manner relative to it. Here, the coupling device is connected to the output shaft, preferably releasably connected, in particular screwed, and the axially rear end of the bit holder is in rotationally fixed but axially displaceable engagement with the coupling device. The bit holder can be guided in an axially displaceable manner at the axially front end of the screwdriver housing via a bearing arrangement which includes a bearing, in particular a plain bearing. The coupling device can be surrounded by a coupling device housing which is arranged in the axially front end section of the screwdriver housing and is detachably connected to it, preferably screwed. In principle, the coupling device housing can also be designed in one piece with the screwdriver housing. Elastic restoring means, such as a helical compression spring, disc spring and/or rubber spring, are expediently provided, which are located between the coupling device and Support the bit holder and push the bit holder into an axially forward starting position. The elastic restoring means preferably encompass the bit holder in order to be supported on the inside by it. Because the bit holder is axially displaceable relative to the output shaft against the restoring force of the elastic restoring means, the contact pressure exerted on the bit holder can be detected, for example with a suitable measuring device, and as soon as the detected contact pressure reaches or exceeds the value of a desired triggering force, the motor Switch on according to the torque wrench arrangement. If an intermediate element is provided, the support arrangement can be connected to the screwdriver housing via the coupling device housing as an intermediate element.

Das Antriebsgehäuse ist an der Abstützstelle über die Abstützanordnung mit dem Schraubendrehergehäuse verbunden. Die Abstützanordnung kann Antriebsgehäuse-Verbindungsmittel aufweisen, die ausgebildet und/oder eingerichtet sind, um die Abstützanordnung lösbar mit dem Antriebsgehäuse zu verbinden. Die Abstützanordnung kann aber auch fest mit dem Antriebsgehäuse verbunden sein. Beispielsweise kann die Abstützanordnung mit dem Antriebsgehäuse verschweißt, verpresst und/oder verklebt sein. Es ist auch möglich, dass die Abstützanordnung einteilig mit dem Antriebsgehäuse ausgebildet ist. Ebenfalls kann die Abstützanordnung Schraubendrehergehäuse-Verbindungsmittel umfassen, die ausgebildet und/oder eingerichtet sind, um die Abstützanordnung mit dem Schraubendrehergehäuse oder mit einem zwischen dem Schraubendrehergehäuse und der Abstützanordnung vorgesehenen Zwischenelement insbesondere lösbar zu verbinden. Grundsätzlich kann die Abstützanordnung auch einteilig mit dem Zwischenelement ausgebildet sein. Vorteilhaft ist die Drehmomentmesseinrichtung ausgebildet und/oder eingerichtet, um das Reaktions-Drehmoment axial zwischen den Schraubendrehergehäuse-Verbindungsmitteln und den Antriebsgehäuse-Verbindungsmitteln zu erfassen.The drive housing is connected to the screwdriver housing at the support point via the support arrangement. The support assembly may include drive housing connecting means designed and/or configured to releasably connect the support assembly to the drive housing. The support arrangement can also be firmly connected to the drive housing. For example, the support arrangement can be welded, pressed and/or glued to the drive housing. It is also possible for the support arrangement to be formed in one piece with the drive housing. The support arrangement can also include screwdriver housing connecting means which are designed and/or set up to connect the support arrangement, in particular releasably, to the screwdriver housing or to an intermediate element provided between the screwdriver housing and the support arrangement. In principle, the support arrangement can also be designed in one piece with the intermediate element. The torque measuring device is advantageously designed and/or set up to measure the reaction torque axially between the screwdriver housing connecting means and the drive housing connecting means.

Vorteilhafterweise umfasst die Abstützanordnung einen ringförmigen, insbesondere kreisringförmigen Befestigungsflansch, der zwischen seinen beiden Stirnseiten Durchgangsbohrungen aufweist, als Antriebsgehäuse-Verbindungsmittel, über welche der Befestigungsflansch an einer Stirnseite des Antriebsgehäuses verbunden ist. Der ringförmige Befestigungsflansch kann mit radial nach innen ragenden Materialverstärkungen versehen sein, wobei sich vorzugsweise durch jede dieser Materialverstärkungen eine Durchgangsbohrung erstreckt. Alternativ kann der ringförmige Befestigungsflansch in Radialrichtung gemessen eine gleichmäßige Dicke aufweisen. Bevorzugt sind die Durchgangsbohrungen in Umfangsrichtung des Befestigungsflansches insbesondere gleichmäßig voneinander beabstandet angeordnet. Im Falle einer gleichmäßigen Beabstandung der Durchgangsbohrungen ist der Befestigungsflansch in seiner Umfangsrichtung mit relativ gleichmäßiger Stärke an dem Antriebsgehäuse befestigt. Dies kann ebenfalls zu einer möglichst präzisen Erfassung des Abtriebs-Drehmoments beitragen. Die Durchgangsbohrungen können jeweils als Stufenbohrungen mit einem antriebsgehäuseseitigen Abschnitt kleineren Durchmessers und einem sich daran anschließenden Abschnitt größeren Durchmessers ausgebildet sein. Dies hat beispielsweise zum Vorteil, dass der Kopf eines sich durch die Stufenbohrung erstreckenden Befestigungsmittels in dem Abschnitt größeren Durchmessers der Stufenbohrung versenkt werden kann. Vorzugsweise umfasst die Abstützanordnung eine zentrale Durchgangsöffnung, durch welche sich insbesondere ein Teil der Abtriebswelle erstreckt und/oder in welche die Abtriebswelle insbesondere hineinragt.The support arrangement advantageously comprises an annular, in particular annular, fastening flange, which has through holes between its two end faces, as a drive housing connecting means, via which the fastening flange is connected to an end face of the drive housing. The annular fastening flange can be provided with material reinforcements projecting radially inwards, with a through hole preferably extending through each of these material reinforcements. Alternatively, the annular fastening flange can have a uniform thickness measured in the radial direction. The through holes are preferably arranged in particular evenly spaced apart from one another in the circumferential direction of the fastening flange. In the case of a uniform spacing of the through holes, the fastening flange is attached to the drive housing with a relatively uniform thickness in its circumferential direction. This can also contribute to the most precise detection of the output torque. The through holes can each be designed as stepped bores with a drive housing-side section of smaller diameter and an adjoining section of larger diameter. This has the advantage, for example, that the head of a fastener extending through the stepped bore can be sunk into the larger diameter section of the stepped bore. Preferably, the support arrangement comprises a central through opening through which in particular a part of the output shaft extends and/or into which the output shaft in particular protrudes.

Gemäß einer weiteren vorteilhaften Ausführungsform ist die Abstützanordnung als drehelastische Abstützanordnung ausgebildet und umfasst eine insbesondere die zentrale Durchgangsöffnung der Abstützanordnung definierende Hülse, an der die Schraubendrehergehäuse-Verbindungsmittel ausgebildet sind, und einen die Antriebsgehäuse-Verbindungsmittel aufweisenden Außenring, der insbesondere von dem Befestigungsflansch gebildet wird und der die Hülse radial umgibt. Hierbei sind die Hülse und der Außenring, insbesondere der Befestigungsflansch, über radiale Verbindungsstege bevorzugt drehelastisch miteinander verbunden, vorzugsweise ausschließlich über die radialen Verbindungsstege miteinander verbunden und ansonsten durch einen Spalt, insbesondere einen Luftspalt, voneinander beabstandet. Der Spalt kann zumindest teilweise mit einer elastischen Masse aufgefüllt sein, wodurch einer Verschmutzung vorgebeugt wird. Bevorzugt umfasst zumindest ein Verbindungssteg die Drehmomentmesseinrichtung oder einen Teil davon oder besteht zumindest ein Verbindungssteg aus der Drehmomentmesseinrichtung oder ist zumindest ein Verbindungssteg mit der Drehmomentmesseinrichtung oder einem Teil davon verbunden. Dies ist besonders vorteilhaft, wenn die Hülse und der Außenring ausschließlich über die Verbindungsstege miteinander verbunden sind, denn in diesem Fall erfolgt die Abstützung des Reaktions-Drehmoments ausschließlich über die Verbindungsstege, weshalb das Reaktions-Drehmoment mittels der Drehmomentmesseinrichtung an den Verbindungsstegen besonders präzise erfasst werden kann. Zweckmäßigerweise befindet sich zwischen zwei in Umfangsrichtung des Befestigungsflansches benachbarten Durchgangsbohrungen jeweils zumindest ein, bevorzugt genau ein Verbindungssteg. Es ist auch möglich, zwischen zumindest einem Paar von in Umfangsrichtung des Befestigungsflansches benachbarten Durchgangsbohrungen keinen Verbindungssteg vorzusehen. Beispielsweise kann es zwei Paare von in Umfangsrichtung des Befestigungsflansches benachbarten Durchgangsbohrungen geben, zwischen denen jeweils kein Verbindungssteg vorgesehen ist. Vorzugsweise liegen sich die beiden Bereiche der Abstützanordnung, an denen kein Verbindungssteg vorgesehen ist, radial gegenüber.According to a further advantageous embodiment, the support arrangement is designed as a torsionally elastic support arrangement and comprises a in particular the sleeve defining the central through opening of the support arrangement, on which the screwdriver housing connecting means are formed, and an outer ring having the drive housing connecting means, which is in particular formed by the fastening flange and which radially surrounds the sleeve. Here, the sleeve and the outer ring, in particular the fastening flange, are preferably connected to one another in a torsionally elastic manner via radial connecting webs, preferably connected to one another exclusively via the radial connecting webs and are otherwise spaced apart from one another by a gap, in particular an air gap. The gap can be at least partially filled with an elastic mass, thereby preventing contamination. Preferably, at least one connecting web comprises the torque measuring device or a part thereof, or at least one connecting web consists of the torque measuring device, or at least one connecting web is connected to the torque measuring device or a part thereof. This is particularly advantageous if the sleeve and the outer ring are connected to one another exclusively via the connecting webs, because in this case the reaction torque is supported exclusively via the connecting webs, which is why the reaction torque is recorded particularly precisely by means of the torque measuring device on the connecting webs can. There is expediently at least one, preferably exactly one, connecting web between two through holes adjacent in the circumferential direction of the fastening flange. It is also possible not to provide a connecting web between at least one pair of through holes adjacent in the circumferential direction of the fastening flange. For example, there can be two pairs of through holes adjacent in the circumferential direction of the fastening flange, between which no connecting web is provided. The two areas of the support arrangement, on which no connecting web is provided, are preferably radially opposite one another.

Die Hülse ist an einem axialen Endbereich, insbesondere ihrem axial hinteren Endbereich, über die Verbindungsstege mit dem Außenring, insbesondere dem Befestigungsflansch, verbunden und an dem gegenüberliegenden axialen Endbereich, insbesondere ihrem axial vorderen Endbereich, mit einem Innen- oder Außengewindeabschnitt als Schraubendrehergehäuse-Verbindungsmittel versehen. Über den Innen- oder Außengewindeabschnitt kann die drehelastische Abstützanordnung mit einem dazu korrespondierend ausgebildeten Innen- oder Außengewindeabschnitt des Schraubendrehergehäuses oder eines zwischen der drehelastischen Abstützanordnung und dem Schraubendrehergehäuse vorgesehenen Zwischenelements in Gewindeeingriff stehen. Hierbei ist der korrespondierende Innen- oder Außengewindeabschnitt insbesondere am axial hinteren Ende des Zwischenabschnitts vorgesehen. Vorzugsweise ist die Hülse mit einem Außengewindeabschnitt und das Schraubendrehergehäuse oder das Zwischenelement mit einem dazu korrespondierend ausgebildeten Innengewindeabschnitt versehen. Eine derartige Schraubverbindung lässt sich zügig herstellen und auch wieder lösen.The sleeve is connected at an axial end region, in particular its axially rear end region, via the connecting webs to the outer ring, in particular the fastening flange, and at the opposite axial end region, in particular its axially front end region, is provided with an internal or external thread section as a screwdriver housing connecting means . Via the internal or external thread section, the torsionally elastic support arrangement can be in threaded engagement with a correspondingly designed internal or external thread section of the screwdriver housing or with an intermediate element provided between the torsionally elastic support arrangement and the screwdriver housing. Here, the corresponding internal or external thread section is provided in particular at the axially rear end of the intermediate section. Preferably, the sleeve is provided with an externally threaded section and the screwdriver housing or the intermediate element is provided with a correspondingly designed internally threaded section. Such a screw connection can be made and released quickly.

Die in Umfangsrichtung der drehelastischen Abstützanordnung weisenden Seitenflächen der Verbindungsstege können als planare Flächen ausgebildet sein. Außerdem können die Verbindungsstege in Umfangsrichtung der drehelastischen Abstützanordnung jeweils eine zumindest im Wesentlichen einheitliche Dicke aufweisen. Generell ist es vorteilhaft, wenn die Verbindungsstege eine einheitliche oder zumindest im Wesentlichen einheitliche Abmessung aufweisen. Denn dies erleichtert eine Kalibrierung der Drehmomentmesseinrichtung und/oder der Drehmomentschrauberanordnung. In bevorzugter Weise sind die Verbindungsstege in Umfangsrichtung der drehelastischen Abstützanordnung gleichmäßig voneinander beabstandet angeordnet. Dies ist besonders vorteilhaft, wenn die Drehmomentmesseinrichtung oder Teile davon in die Verbindungsstege integriert oder daran angebracht sind, also die Messung des Reaktions-Drehmoments an den Verbindungsstegen erfolgt. Denn in diesem Fall lässt sich das Abtriebs-Drehmoment aufgrund der gleichmäßig entlang des Umfangs des drehelastischen Verbindungselements verteilten Messpunkte besonders präzise erfassen.The side surfaces of the connecting webs pointing in the circumferential direction of the torsionally elastic support arrangement can be designed as planar surfaces. In addition, the connecting webs can each have an at least substantially uniform thickness in the circumferential direction of the torsionally elastic support arrangement. In general, it is advantageous if the connecting webs have a uniform or at least essentially uniform dimension. This makes it easier to calibrate the torque measuring device and/or the torque wrench arrangement. Preferably, the connecting webs are arranged evenly spaced apart from one another in the circumferential direction of the torsionally elastic support arrangement. This is particularly advantageous if the torque measuring device or Parts of it are integrated into the connecting webs or attached to them, so the reaction torque is measured on the connecting webs. In this case, the output torque can be recorded particularly precisely due to the measuring points evenly distributed along the circumference of the torsionally elastic connecting element.

Gemäß einer weiteren vorteilhaften Ausführungsform umfasst die Drehmomentmesseinrichtung zumindest einen Dehnungsmessstreifen, der derart angeordnet und/oder verschaltet ist, dass damit ein Drehmoment messbar ist, und der bevorzugt nach dem Prinzip der Wheatstone-Brücke zu einer oder mehreren Viertel-, Halb- und/oder Vollbrücken verschaltet ist. Hierbei können mehrere Brücken zueinander in Reihe, parallel und/oder gemischt geschaltet sein. Mittels Dehnungsmessstreifen lassen sich dehnende und stauchende Verformungen messen. Denn Dehnungsmessstreifen ändern bereits bei geringen Verformungen ihren elektrischen Widerstand. Zweckmäßigerweise ist der oder sind die Dehnungsmessstreifen derart ausgebildet und/oder angeordnet und/oder verschaltet, dass sie jeweils bei einer durch ein Reaktions-Drehmoment bewirkten Verformung ihren elektrischen Widerstand ändern und diese Widerstandsänderung messbar ist und daraus wiederum das wirkende Drehmoment ableitbar ist. Vorzugsweise ist der zumindest eine Dehnungsmessstreifen auf eine in Umfangsrichtung der drehelastischen Abstützanordnung weisende Seitenfläche eines Verbindungsstegs aufgebracht. Insbesondere ist auf die in Umfangsrichtung der drehelastischen Abstützanordnung weisenden Seitenflächen der Verbindungsstege jeweils zumindest ein Dehnungsmessstreifen aufgebracht.According to a further advantageous embodiment, the torque measuring device comprises at least one strain gauge, which is arranged and / or connected in such a way that a torque can be measured, and which is preferably based on the principle of the Wheatstone bridge to one or more quarter, half and / or Full bridges are connected. Several bridges can be connected in series, parallel and/or mixed. Stretching and compressing deformations can be measured using strain gauges. Strain gauges change their electrical resistance even with small deformations. The strain gauge(s) is or are expediently designed and/or arranged and/or connected in such a way that they each change their electrical resistance in the event of a deformation caused by a reaction torque and this change in resistance can be measured and the acting torque can in turn be derived from this. Preferably, the at least one strain gauge is applied to a side surface of a connecting web pointing in the circumferential direction of the torsionally elastic support arrangement. In particular, at least one strain gauge is applied to the side surfaces of the connecting webs pointing in the circumferential direction of the torsionally elastic support arrangement.

Eine weitere Ausgestaltung der Erfindung zeichnet sich dadurch aus, dass die Abstützanordnung ein antriebsgehäuseseitiges Abstützelement, an dem die Antriebsgehäuse-Verbindungsmittel vorgesehen sind, und ein schraubendrehergehäuseseitiges Abstützelement, an dem die Schraubendrehergehäuse-Verbindungsmittel vorgesehen sind, aufweist. Hierbei kann eines der beiden Abstützelemente mit wenigstens einer Aussparung und das andere Abstützelement mit wenigstens einem dazu korrespondierend ausgebildeten, in die Aussparung hineinragenden Vorsprung versehen sein, wobei jeweils zwischen zwei gegenüberliegenden, in Umfangsrichtung der Abstützanordnung weisenden Seitenflächen einer Aussparung und eines zugehörigen Vorsprungs ein Spalt gebildet ist, und die Anordnung derart getroffen ist, dass die Abstützung des Reaktions-Drehmoments in Umfangsrichtung der Abstützanordnung zwischen den Seitenflächen erfolgt. Bevorzugt ist in wenigstens einem Spalt ein Teil der Drehmomentmesseinrichtung, insbesondere wenigstens ein Piezoelement und/oder piezoelektrischer Sensor und/oder piezoresistiver Sensor der Drehmomentmesseinrichtung angeordnet. Hierbei kann der Teil der Drehmomentmesseinrichtung derart angeordnet, bevorzugt derart an wenigstens einer der beiden Seitenflächen befestigt sein, dass bei einer Verringerung der Breite des Spaltes bei einem gegeneinander Verdrehen der beiden Abstützelemente ein Druck auf den in dem Spalt angeordneten Teil der Drehmomentmesseinrichtung ausgeübt wird, der als elektrisches Signal detektierbar ist. Hierbei ist das elektrische Signal insbesondere mittels einer Steuerungselektronik detektierbar.A further embodiment of the invention is characterized in that the support arrangement has a drive housing-side support element, on which the drive housing connecting means are provided, and a screwdriver housing-side support element, on which the screwdriver housing connecting means are provided. Here, one of the two support elements can be provided with at least one recess and the other support element can be provided with at least one correspondingly designed projection projecting into the recess, a gap being formed between two opposite side surfaces of a recess and an associated projection pointing in the circumferential direction of the support arrangement is, and the arrangement is such that the reaction torque is supported in the circumferential direction of the support arrangement between the side surfaces. Preferably, a part of the torque measuring device, in particular at least one piezo element and/or piezoelectric sensor and/or piezoresistive sensor of the torque measuring device, is arranged in at least one gap. Here, the part of the torque measuring device can be arranged in such a way, preferably attached to at least one of the two side surfaces, that when the width of the gap is reduced when the two support elements are rotated relative to one another, pressure is exerted on the part of the torque measuring device arranged in the gap can be detected as an electrical signal. The electrical signal can be detected in particular by means of control electronics.

Vorteilhafterweise ist das antriebsgehäuseseitige Abstützelement als ringförmiger Befestigungsflansch ausgebildet und/oder ist das schraubendrehergehäuseseitige Abstützelement als ringförmige Platte ausgebildet. Der wenigstens eine Vorsprung oder die wenigstens eine Vertiefung kann an der dem antriebsgehäuseseitigen Abstützelement zugewandten Stirnseite der ringförmigen Platte angeordnet sein. An der gegenüberliegenden Stirnseite der ringförmigen Platte kann sich ein hülsenartiger Fortsatz befinden, der insbesondere koaxial zu einer zentralen Bohrung der ringförmigen Platte angeordnet ist. Die Bohrung und der Fortsatz der ringförmigen Platte bilden bevorzugt einen Teil einer zentralen Durchgangsöffnung der Abstützanordnung, durch welche sich insbesondere ein Teil der Abtriebswelle erstreckt und/oder in welche die Abstriebswelle hineinragt. Der hülsenartige Fortsatz kann mit einem Innen- oder Außengewindeabschnitt als Schraubendrehergehäuse-Verbindungsmittel versehen sein, über welchen das schraubendrehergehäuseseitige Abstützelement mit einem dazu korrespondierend ausgebildeten Innen- oder Außengewindeabschnitt des Schraubendrehergehäuses oder eines zwischen dem schraubendrehergehäuseseitigen Abstützelement und dem Schraubendrehergehäuse vorgesehenen Zwischenelement in Gewindeeingriff steht.Advantageously, the drive housing-side support element is designed as an annular fastening flange and/or the screwdriver housing-side support element is designed as an annular plate. The at least one projection or the at least one recess can be arranged on the end face of the annular plate facing the drive housing-side support element. On the opposite end face of the annular plate there can be a sleeve-like extension, which is arranged in particular coaxially with a central bore in the annular plate. The bore and the extension of the annular plate preferably form part of a central through opening of the support arrangement, through which in particular a part of the output shaft extends and/or into which the output shaft projects. The sleeve-like extension can be provided with an internal or external thread section as a screwdriver housing connecting means, via which the screwdriver housing-side support element is in threaded engagement with a correspondingly designed internal or external thread section of the screwdriver housing or an intermediate element provided between the screwdriver housing-side support element and the screwdriver housing.

Vorteilhafterweise umfasst die Drehmomentmesseinrichtung zumindest einen Sensor, wie etwa einen Widerstandssensor und/oder einen elektromagnetischen Sensor und/oder einen Hallsensor und/oder einen magnetoresistiven Sensor und/oder einen galvanomagnetischen Sensor und/oder einen optoelektronischen Sensor und/oder ein Piezoelement und/oder einen piezoelektrischen Sensor und/oder einen piezoresistiven Sensor. Die Drehmomentmesseinrichtung kann auch einen Sensor umfassen, der ausgebildet und/oder eingerichtet ist, um einen Verdrehwinkel und/oder eine Position und/oder eine Verformung und/oder oder eine Verdrillung und/oder eine Verdrehung und/oder eine Torsion und/oder eine Scherkraft und/oder eine Scherung der insbesondere drehelastischen Abstützanordnung, insbesondere eines Bereichs der Abstützanordnung, und/oder des Antriebsgehäuses zu erfassen. Bei der späteren Umrechnung der von einem Sensor erhaltenen Messwerte auf das Reaktions-Drehmoment kann insbesondere die Materialsteifigkeit der drehelastischen Abstützanordnung berücksichtigt werden.Advantageously, the torque measuring device comprises at least one sensor, such as a resistance sensor and/or an electromagnetic sensor and/or a Hall sensor and/or a magnetoresistive sensor and/or a galvanomagnetic sensor and/or an optoelectronic sensor and/or a piezo element and/or a piezoelectric sensor and/or a piezoresistive sensor. The torque measuring device can also include a sensor that is designed and/or set up to measure a twist angle and/or a position and/or a deformation and/or a twist and/or a rotation and/or a torsion and/or a shear force and/or to detect shearing of the particularly torsionally elastic support arrangement, in particular a region of the support arrangement, and/or of the drive housing. When later converting the measured values obtained from a sensor to the reaction torque, the material stiffness of the torsionally elastic support arrangement can in particular be taken into account.

Eine weitere Ausgestaltung der Erfindung zeichnet sich dadurch aus, dass die Drehmomentmesseinrichtung zumindest zwei Messeinrichtungselemente umfasst, die derart ausgebildet und/oder angeordnet sind, dass sie bei einer rotatorischen Auslenkung der insbesondere drehelastischen Abstützanordnung relativ zueinander verschoben werden. Bevorzugt ist zumindest ein Messeinrichtungselement ein Sensor oder ein Teil eines Sensors. Der Sensor kann beispielsweise einer der zuvor aufgeführten Sensoren sein. Besonders bevorzugt handelt es sich bei den Messeinrichtungselementen um ein magnetfelderzeugendes Element und ein magnetfeldmessendes Element. Als magnetfeldmessendes Element kommen beispielsweise ein Hallsensor und/oder ein magnetoresistives Element in Frage. Die Verwendung von magnetfelderzeugenden und magnetfeldmessenden Elementen ermöglicht verglichen mit anderen in Frage kommenden Messeinrichtungselementen eine besonders präzise Erfassung des Abtriebs-Drehmoments. Zudem lassen sich magnetfelderzeugende und magnetfeldmessende Elemente relativ einfach montieren.A further embodiment of the invention is characterized in that the torque measuring device comprises at least two measuring device elements which are designed and/or arranged in such a way that during a rotational deflection of the particularly torsionally elastic support arrangement be moved relative to each other. Preferably, at least one measuring device element is a sensor or part of a sensor. The sensor can be, for example, one of the sensors listed previously. The measuring device elements are particularly preferably a magnetic field generating element and a magnetic field measuring element. A Hall sensor and/or a magnetoresistive element, for example, can be used as a magnetic field measuring element. The use of magnetic field generating and magnetic field measuring elements enables particularly precise detection of the output torque compared to other possible measuring device elements. In addition, magnetic field generating and magnetic field measuring elements can be installed relatively easily.

Falls die Abstützanordnung eine Hülse und einen Außenring, insbesondere einen Befestigungsflansch, umfasst, die über Verbindungsstege miteinander verbunden sind, ist ein Messeinrichtungselement der Drehmomentmesseinrichtung bevorzugt an einer radial außen liegenden Fläche der Hülse, insbesondere auf einem Podest montiert, angeordnet. Vorzugsweise ist das Messeinrichtungselement an einer radial außen liegenden Fläche des axialen Endbereichs der Hülse, an dem die Hülse über die Verbindungsstege mit dem Außenring verbunden ist, insbesondere auf einem Podest montiert, angeordnet. Ein weiteres Messeinrichtungselement der Drehmomentmesseinrichtung ist vorzugsweise an einer radial innen liegenden Fläche des Außenrings, bevorzugt des ringförmigen Befestigungsflansches, insbesondere auf einem Podest montiert, angeordnet. Die Anordnung des einen Messeinrichtungselements an der Hülse und des anderen Messeinrichtungselements an dem Außenring kann selbstverständlich auch vertauscht sein. Vorteilhafterweise liegen sich die beiden Messeinrichtungselemente der Drehmomentmesseinrichtung gegenüber, berühren sich jedoch insbesondere nicht. Die Drehmomentmesseinrichtung kann ausgebildet und/oder eingerichtet sein, um eine Verschiebung ihrer beiden Messeinrichtungselemente in Umfangsrichtung der drehelastischen Abstützanordnung relativ zueinander bei einem gegeneinander Verdrehen der Hülse und des Außenrings, insbesondere des Befestigungsflansches, zu erfassen. Eine Anordnung aus zwei gegenüberliegenden Messeinrichtungselementen der Drehmomentmesseinrichtung kann anstelle eines Verbindungsstegs vorgesehen sein. Außerdem kann die Anordnung in Umfangsrichtung der drehelastischen Abstützanordnung insbesondere zwischen zwei benachbarten Durchgangsbohrungen des Befestigungsflansches positioniert sein. Vorzugsweise ist in einem der Anordnung direkt radial gegenüberliegenden Bereich der drehelastischen Abstützanordnung kein Verbindungssteg vorgesehen.If the support arrangement comprises a sleeve and an outer ring, in particular a fastening flange, which are connected to one another via connecting webs, a measuring device element of the torque measuring device is preferably arranged on a radially outer surface of the sleeve, in particular mounted on a pedestal. Preferably, the measuring device element is arranged on a radially outer surface of the axial end region of the sleeve, on which the sleeve is connected to the outer ring via the connecting webs, in particular mounted on a pedestal. A further measuring device element of the torque measuring device is preferably arranged on a radially inner surface of the outer ring, preferably of the annular fastening flange, in particular mounted on a pedestal. The arrangement of one measuring device element on the sleeve and the other measuring device element on the outer ring can of course also be reversed. Advantageously, the two measuring device elements of the torque measuring device lie opposite each other, but in particular do not touch each other. The torque measuring device can be designed and/or set up to in order to detect a displacement of its two measuring device elements in the circumferential direction of the torsionally elastic support arrangement relative to one another when the sleeve and the outer ring, in particular the fastening flange, are rotated against one another. An arrangement of two opposing measuring device elements of the torque measuring device can be provided instead of a connecting web. In addition, the arrangement can be positioned in the circumferential direction of the torsionally elastic support arrangement, in particular between two adjacent through holes in the fastening flange. Preferably, no connecting web is provided in a region of the torsionally elastic support arrangement that is directly radially opposite the arrangement.

Gemäß einer weiteren Ausführungsform weist der Antriebsstrang ein Getriebe auf, das sich an das axial vordere Ende des Motors anschließt und in dem Antriebsgehäuse angeordnet ist. Hierbei kann das Antriebsgehäuse zweiteilig ausgebildet sein, wobei der Motor in einem ersten, insbesondere axial hinteren Teil des Antriebsgehäuses angeordnet ist und das Getriebe in einem zweiten, insbesondere axial vorderen Teil des Antriebsgehäuses angeordnet ist. Weiterhin kann das Antriebsgehäuse in Radialrichtung durch einen Spalt, insbesondere einen Luftspalt, von dem Schraubendrehergehäuse getrennt sein. Dies unterstützt die drehbare Lagerung des Antriebsgehäuses im Schraubendrehergehäuse.According to a further embodiment, the drive train has a transmission which connects to the axially front end of the motor and is arranged in the drive housing. Here, the drive housing can be designed in two parts, with the motor being arranged in a first, in particular axially rear, part of the drive housing and the gearbox being arranged in a second, in particular axially front, part of the drive housing. Furthermore, the drive housing can be separated from the screwdriver housing in the radial direction by a gap, in particular an air gap. This supports the rotatable storage of the drive housing in the screwdriver housing.

Eine weitere Ausgestaltung der Erfindung zeichnet sich dadurch aus, dass eine Steuerungselektronik vorgesehen ist, die mit der Drehmomentmesseinrichtung und dem Motor gekoppelt ist, um den Motor in Abhängigkeit von Ausgangssignalen der Drehmomentmesseinrichtung auszuschalten. Somit kann der Motor der Drehmomentschrauberanordnung automatisch ausgeschaltet werden, sobald ein vorbestimmtes Solldrehmoment erreicht oder überschritten ist, wodurch Beschädigungen einer mittels der Drehmomentschrauberanordnung hergestellten Schraubverbindung vermieden werden. Bei der Steuerungselektronik kann es sich um eine an dem Schraubendrehergehäuse angeordnete, insbesondere zumindest teilweise, gegebenenfalls vollständig innerhalb des Schraubendrehergehäuses angeordnete, interne Steuerungselektronik, eine von dem Schraubendrehergehäuse entfernt angeordnete, externe Steuerungselektronik und/oder einen übergeordneten Kontroller handeln. Außerdem kann die Steuerungselektronik einen Speicher, insbesondere einen RAM-Speicher, zum Speichern von mehreren vordefinierten Solldrehmomenten und/oder eine Benutzerschnittstelle oder ein Einstell- und/oder Eingabemittel, insbesondere einen berührungsempfindlichen Bildschirm, ein Jogwheel und/oder eine Folientastatur, zum Einstellen eines insbesondere in dem Speicher gespeicherten Solldrehmoments umfassen. Darüber hinaus kann vorgesehen sein, dass das Drehmoment des Motors über ein Poti insbesondere direkt an einem elektrischen Schraubendreher der Drehmomentschrauberanordnung einstellbar und/oder speicherbar ist.A further embodiment of the invention is characterized in that control electronics are provided which are coupled to the torque measuring device and the motor in order to switch off the motor depending on output signals from the torque measuring device. The motor of the torque wrench arrangement can therefore be switched off automatically as soon as a predetermined target torque is reached is exceeded, whereby damage to a screw connection produced by means of the torque screwdriver arrangement is avoided. The control electronics can be internal control electronics arranged on the screwdriver housing, in particular at least partially, possibly completely within the screwdriver housing, external control electronics arranged remotely from the screwdriver housing and/or a higher-level controller. In addition, the control electronics can have a memory, in particular a RAM memory, for storing several predefined target torques and / or a user interface or a setting and / or input means, in particular a touch-sensitive screen, a jog wheel and / or a membrane keyboard, for setting a particular target torque stored in the memory. In addition, it can be provided that the torque of the motor can be adjusted and/or stored via a potentiometer, in particular directly on an electric screwdriver of the torque screwdriver arrangement.

Weitere Merkmale und Vorteile der vorliegenden Erfindung werden anhand der nachfolgenden Beschreibung von vier Ausführungsformen einer Drehmomentschrauberanordnung gemäß der vorliegenden Erfindung unter Bezugnahme auf die beiliegende Zeichnung deutlich. Darin ist:

Figur 1
eine schematische Teilschnittansicht einer Drehmomentschrauberanordnung gemäß einer ersten Ausführungsform der vorliegenden Erfindung;
Figur 2
eine vergrößerte Ansicht des in Figur 1 mit dem Buchstaben "A" gekennzeichneten Bereichs der Drehmomentschrauberanordnung;
Figur 3
eine vergrößerte Ansicht des in Figur 1 mit dem Buchstaben "A" gekennzeichneten Bereichs der Drehmomentschrauberanordnung mit zusätzlich eingezeichnetem Drehmomentübertragungsweg;
Figur 4
eine vergrößerte Ansicht des in Figur 1 mit dem Buchstaben "B" gekennzeichneten Bereichs der Drehmomentschrauberanordnung;
Figur 5
eine perspektivische Ansicht eines axial vorderen Bereichs der Drehmomentschrauberanordnung gemäß der ersten Ausführungsform;
Figur 6
eine perspektivische Ansicht einer drehelastischen Abstützanordnung der Drehmomentschrauberanordnung gemäß der ersten Ausführungsform;
Figur 7
eine Vorderansicht der drehelastischen Abstützanordnung aus Figur 6;
Figur 8
eine vergrößerte Ansicht des in Figur 7 mit dem Buchstaben "C" gekennzeichneten Bereichs der drehelastischen Abstützanordnung;
Figur 9
eine weitere Vorderansicht der drehelastischen Abstützanordnung aus Figur 6;
Figur 10
eine Vorderansicht einer drehelastischen Abstützanordnung einer Drehmomentschrauberanordnung gemäß einer zweiten Ausführungsform der vorliegenden Erfindung;
Figur 11
eine perspektivische Ansicht einer Abstützanordnung einer Drehmomentschrauberanordnung gemäß einer dritten Ausführungsform der vorliegenden Erfindung;
Figur 12
eine Vorderansicht eines antriebsgehäuseseitigen Abstützelements der Abstützanordnung aus Figur 11;
Figur 13
eine schematische Teilschnittansicht der Drehmomentschrauberanordnung gemäß den ersten, zweiten und dritten Ausführungsformen mit angedeuteter Position einer Abstützstelle zwischen Antriebsgehäuse und Schraubendrehergehäuse;
Figur 14
eine vergrößerte Ansicht des axial vorderen Bereichs der Drehmomentschrauberanordnung von Figur 13;
Figur 15
eine schematische Teilschnittansicht einer Drehmomentschrauberanordnung gemäß einer vierten Ausführungsform der vorliegenden Erfindung; und
Figur 16
eine Veranschaulichung des Reaktions-Drehmoments in Bezug auf das Abtriebs-Drehmoment.
Further features and advantages of the present invention will become apparent from the following description of four embodiments of a torque wrench assembly according to the present invention with reference to the accompanying drawing. In it is:
Figure 1
a schematic partial sectional view of a torque wrench assembly according to a first embodiment of the present invention;
Figure 2
an enlarged view of the in Figure 1 area of the torque wrench assembly marked with the letter “A”;
Figure 3
an enlarged view of the in Figure 1 Area of the torque wrench arrangement marked with the letter “A” with an additional torque transmission path marked;
Figure 4
an enlarged view of the in Figure 1 area of the torque wrench assembly marked with the letter “B”;
Figure 5
a perspective view of an axially front portion of the torque wrench assembly according to the first embodiment;
Figure 6
a perspective view of a torsionally elastic support arrangement of the torque wrench arrangement according to the first embodiment;
Figure 7
a front view of the torsionally elastic support arrangement Figure 6 ;
Figure 8
an enlarged view of the in Figure 7 area of the torsionally elastic support arrangement marked with the letter “C”;
Figure 9
another front view of the torsionally elastic support arrangement Figure 6 ;
Figure 10
a front view of a torsionally elastic support assembly of a torque wrench assembly according to a second embodiment of the present invention;
Figure 11
a perspective view of a support assembly of a torque wrench assembly according to a third embodiment of the present invention;
Figure 12
a front view of a drive housing-side support element of the support arrangement Figure 11 ;
Figure 13
a schematic partial sectional view of the torque wrench arrangement according to the first, second and third embodiments with an indicated position of a support point between the drive housing and the screwdriver housing;
Figure 14
an enlarged view of the axially front region of the torque wrench assembly from Figure 13 ;
Figure 15
a schematic partial sectional view of a torque wrench assembly according to a fourth embodiment of the present invention; and
Figure 16
an illustration of reaction torque in relation to output torque.

Die Figuren 1 bis 9 zeigen eine Drehmomentschrauberanordnung 1 gemäß einer ersten Ausführungsform der vorliegenden Erfindung. Die Drehmomentschrauberanordnung 1 weist einen elektrischen Schraubendreher 2 und eine mit diesem verbundene, externe Steuerungselektronik 3a auf. Der elektrische Schraubendreher 2 umfasst ein Schraubendrehergehäuse 4, das aus einem axial vorderen Gehäuseabschnitt 4a, einem mittleren Gehäuseabschnitt 4b und einem axial hinteren Gehäuseabschnitt 4c besteht.The Figures 1 to 9 show a torque wrench assembly 1 according to a first embodiment of the present invention. The torque screwdriver arrangement 1 has an electric screwdriver 2 and external control electronics 3a connected to it. The electric screwdriver 2 includes a screwdriver housing 4, which consists of an axially front housing section 4a, a middle housing section 4b and an axially rear housing section 4c.

Weiterhin weist der elektrische Schraubendreher 2 einen in den mittleren und axial vorderen Gehäuseabschnitten 4a, 4b des Schraubendrehergehäuses 4 angeordneten Antriebsstrang 5 auf. Dieser weist ein in Radialrichtung durch einen Spalt 6, hier einen Luftspalt, von dem Schraubendrehergehäuse 4 getrenntes, zweiteiliges Antriebsgehäuse 7, einen in einem axial hinteren Teil 7a des Antriebsgehäuses 7 angeordneten Motor 8 in Form eines Elektromotors, ein in einem axial vorderen Teil 7b des Antriebsgehäuses 7 angeordnetes und mit dem Motor 8 verbundenes Getriebe 9, und eine Abtriebswelle 10 des Getriebes 9 auf. Die Abtriebswelle 10 ragt aus dem Antriebsgehäuse 7 an dessen axial vorderer Stirnseite heraus. Das axial vordere Ende der Abtriebswelle 10 ist mit einem Bithalter 11 mit einer Bitaufnahme 12 zur Fixierung eines nicht dargestellten Schraubbits drehfest verbunden. Des Weiteren umfasst der elektrische Schraubendreher 2 eine drehelastische Abstützanordnung 13, welche an genau einer Abstützstelle 14 vorgesehen ist und über welche das während des Betriebs der Drehmomentschrauberanordnung 1 auf das Antriebsgehäuse 7 ausgeübte Reaktions-Drehmoment an dem Schraubendrehergehäuse 4 abgestützt wird. Das Antriebsgehäuse 7 ist an der Abstützstelle 14 über die drehelastische Abstützanordnung 13 mit dem Schraubendrehergehäuse 4 verbunden und ansonsten drehbar im Schraubendrehergehäuse 4 vorgesehen. Genauer gesagt ist die drehelastische Abstützanordnung 13 zwischen der axial vorderen Stirnseite des Antriebsgehäuses 7 und dem Schraubendrehergehäuse 4 angeordnet und ist das Antriebsgehäuse 7 an seiner axial hinteren Stirnseite vorliegend über ein Walzlager, hier ein Rillenkugellager 15 drehbar im Schraubendrehergehäuse 4 gelagert.Furthermore, the electric screwdriver 2 has a drive train 5 arranged in the middle and axially front housing sections 4a, 4b of the screwdriver housing 4. This has a two-part drive housing 7 separated in the radial direction by a gap 6, here an air gap, from the screwdriver housing 4, a motor 8 in the form of an electric motor arranged in an axially rear part 7a of the drive housing 7, a motor 8 in the form of an electric motor in an axially front part 7b of the screwdriver housing 4 Drive housing 7 arranged and connected to the motor 8 gear 9, and an output shaft 10 of the gear 9. The output shaft 10 protrudes from the drive housing 7 on its axially front end. The axially front end of the output shaft 10 is connected in a rotationally fixed manner to a bit holder 11 with a bit holder 12 for fixing a screw bit, not shown. Furthermore, the electric screwdriver 2 comprises a torsionally elastic support arrangement 13, which is provided at exactly one support point 14 and via which the reaction torque exerted on the drive housing 7 during operation of the torque screwdriver arrangement 1 is supported on the screwdriver housing 4. The drive housing 7 is connected to the screwdriver housing 4 at the support point 14 via the torsionally elastic support arrangement 13 and is otherwise rotatable in the screwdriver housing 4. More precisely, the torsionally elastic support arrangement 13 is arranged between the axially front end face of the drive housing 7 and the screwdriver housing 4 and the drive housing 7 is rotatably mounted in the screwdriver housing 4 on its axially rear end face, in this case via a roller bearing, here a deep groove ball bearing 15.

Darüber hinaus ist der elektrische Schraubendreher 2 mit einer Drehmomentmesseinrichtung 16 mit acht Dehnungsmessstreifen 16a ausgestattet. Die Drehmomentmesseinrichtung 16 ist ausgebildet und/oder eingerichtet, um das Abtriebs-Drehmoment der Abtriebswelle 10 in Form des abgestützten Reaktions-Drehmoments an der drehelastischen Abstützanordnung 13 zu erfassen.In addition, the electric screwdriver 2 is equipped with a torque measuring device 16 with eight strain gauges 16a. The torque measuring device 16 is designed and/or set up in order to detect the output torque of the output shaft 10 in the form of the supported reaction torque on the torsionally elastic support arrangement 13.

Des Weiteren umfasst der elektrische Schraubendreher 2 eine Kupplungseinrichtung 17, über die der Bithalter 11 mit dem axial vorderen Ende der Abtriebswelle 10 drehfest aber relativ zu dieser axial verschiebbar verbunden ist. Hierzu steht das axial hintere Ende des Bithalters 11 mit der Kupplungseinrichtung 17 in drehfestem, aber axial verschiebbaren Eingriff. Vorliegend ist der Bithalter 11 am axial vorderen Ende des Schraubendrehergehäuses 4 über eine ein Gleitlager umfassende Lageranordnung 18 axial verschiebbar geführt. Die Kupplungseinrichtung 17 ist mit der Abtriebswelle 10 lösbar verbunden. Außerdem ist die Kupplungseinrichtung 17 von einem Kupplungseinrichtungsgehäuse 19 umgeben, das in dem axial vorderen Gehäuseabschnitt 4a des Schraubendrehergehäuses 4 angeordnet und mit diesem lösbar verbunden, genauer gesagt an einer Verschraubungsstelle 20 verschraubt ist. Der Bithalter 11 wird durch elastische Rückstellmittel 21 in Form einer Schraubendruckfeder in eine axial vordere Ausgangslage gedrückt. Konkret stützt sich die Schraubendruckfeder axial zwischen einer vorderen Stirnfläche der Kupplungseinrichtung 17 und einer rückseitigen Stirnfläche des Bithalters 11 ab, wobei sie auf den axial hinteren Endabschnitt des Bithalters 11 aufgesetzt ist, sodass sie diesen umgreift und durch diesen innenseitig abgestützt wird.Furthermore, the electric screwdriver 2 includes a coupling device 17, via which the bit holder 11 is connected to the axially front end of the output shaft 10 in a rotationally fixed manner but is axially displaceable relative to it. For this purpose, the axially rear end of the bit holder 11 is in rotationally fixed but axially displaceable engagement with the coupling device 17. In the present case, the bit holder 11 is guided in an axially displaceable manner at the axially front end of the screwdriver housing 4 via a bearing arrangement 18 comprising a plain bearing. The coupling device 17 is detachably connected to the output shaft 10. In addition, the coupling device 17 is surrounded by a coupling device housing 19, which is arranged in the axially front housing section 4a of the screwdriver housing 4 and is releasably connected to it, more precisely screwed at a screw connection point 20. The bit holder 11 is pressed into an axially forward starting position by elastic restoring means 21 in the form of a helical compression spring. Specifically, the helical compression spring is supported axially between a front end face of the coupling device 17 and a rear end face of the bit holder 11, being placed on the axially rear end section of the bit holder 11 so that it surrounds it and is supported on the inside by it.

Die drehelastische Abstützanordnung 13 weist einen von einem kreisringförmigen Befestigungsflansch 22 gebildeten Außenring auf. Der Befestigungsflansch 22 ist zwischen seinen beiden Stirnseiten mit vier Durchgangsbohrungen 23 als Antriebsgehäuse-Verbindungsmittel versehen, über welche der Befestigungsflansch 22 lösbar mit der axial vorderen Stirnseite des Antriebsgehäuses 7 verbunden ist. Die Durchgangsbohrungen 23 erstrecken sich jeweils durch einen Bereich des Befestigungsflansches 22, an dem letzterer mittels radial nach innen ragender Materialverstärkungen verstärkt ist. Konkret ist der Befestigungsflansch 22 mittels Befestigungsschrauben 24, die sich durch die Durchgangsbohrungen 23 erstrecken, mit dem Antriebsgehäuse 7 verschraubt. Die Durchgangsbohrungen 23 sind in Umfangsrichtung des Befestigungsflansches 22 gleichmäßig voneinander beabstandet angeordnet, und als Stufenbohrungen mit einem antriebsgehäuseseitigen Abschnitt 23a kleineren Durchmessers und einem sich daran anschließenden Abschnitt 23b größeren Durchmessers ausgebildet. Wie insbesondere in Figur 5 zu erkennen ist, sind die Schraubenköpfe 25 der Befestigungsschrauben 24 jeweils in einem der Abschnitte 23a größeren Durchmessers versenkt.The torsionally elastic support arrangement 13 has an outer ring formed by an annular fastening flange 22. The fastening flange 22 is provided between its two end faces with four through holes 23 as drive housing connecting means, via which the fastening flange 22 is detachably connected to the axially front end face of the drive housing 7. The through holes 23 extend each through an area of the fastening flange 22, on which the latter is reinforced by means of material reinforcements projecting radially inwards. Specifically, the fastening flange 22 is screwed to the drive housing 7 by means of fastening screws 24, which extend through the through holes 23. The through holes 23 are arranged evenly spaced apart from one another in the circumferential direction of the fastening flange 22 and are designed as stepped holes with a drive housing-side section 23a of smaller diameter and an adjoining section 23b of larger diameter. As can be seen in particular in Figure 5, the screw heads 25 of the fastening screws 24 are each sunk in one of the larger diameter sections 23a.

Des Weiteren umfasst die drehelastische Abstützanordnung 13 eine Hülse 26, die eine zentrale Durchgangsöffnung 27 der drehelastischen Abstützanordnung 13 definiert, durch welche sich die Abtriebswelle 10 hindurch erstreckt. Die Hülse 26 ist von dem Befestigungsflansch 22 radial umgeben und an ihrem axial hinteren Endbereich mit dem Befestigungsflansch 22 über vier radiale Verbindungsstege 28 verbunden. Grundsätzlich kann die Hülse 26 jedoch über beliebig viele Verbindungsstege 28 mit dem Befestigungsflansch 22 verbunden sein. Hierbei sind die Hülse 26 und der Befestigungsflansch 22 ausschließlich über die Verbindungsstege 28 miteinander verbunden und ansonsten durch einen Spalt 29, hier einen Luftspalt, voneinander beabstandet. Der Spalt 29 kann zumindest teilweise mit einer elastischen Masse ausgefüllt sein. Zwischen zwei in Umfangsrichtung des Befestigungsflansches 22 benachbarten Durchgangsbohrungen 23 befindet sich jeweils mittig genau ein Verbindungssteg 28. Auch eine außermittige Anordnung der Verbindungsstege 28 ist möglich. Die Verbindungsstege 28 sind in Umfangsrichtung der drehelastischen Abstützanordnung 13 also gleichmäßig voneinander beabstandet angeordnet. Außerdem weisen die Verbindungsstege 28 in Umfangsrichtung der drehelastischen Abstützanordnung 13 jeweils eine einheitliche Dicke auf. Generell muss die Dicke jedoch nicht einheitlich sein. Die in Umfangsrichtung der drehelastischen Abstützanordnung 13 weisenden Seitenflächen 30 der Verbindungsstege 28 sind als planare Flächen ausgebildet.Furthermore, the torsionally elastic support arrangement 13 comprises a sleeve 26, which defines a central through opening 27 of the torsionally elastic support arrangement 13, through which the output shaft 10 extends. The sleeve 26 is surrounded radially by the fastening flange 22 and is connected at its axially rear end region to the fastening flange 22 via four radial connecting webs 28. In principle, however, the sleeve 26 can be connected to the fastening flange 22 via any number of connecting webs 28. Here, the sleeve 26 and the fastening flange 22 are connected to one another exclusively via the connecting webs 28 and are otherwise spaced apart from one another by a gap 29, here an air gap. The gap 29 can be at least partially filled with an elastic mass. There is exactly one connecting web 28 in the middle between two through holes 23 adjacent in the circumferential direction of the fastening flange 22. An off-center arrangement of the connecting webs 28 is also possible. The connecting webs 28 are arranged evenly spaced apart from one another in the circumferential direction of the torsionally elastic support arrangement 13. In addition, the connecting webs 28 each have one in the circumferential direction of the torsionally elastic support arrangement 13 uniform thickness. In general, however, the thickness does not have to be uniform. The side surfaces 30 of the connecting webs 28 pointing in the circumferential direction of the torsionally elastic support arrangement 13 are designed as planar surfaces.

Darüber hinaus ist die Hülse 26 an ihrem axial vorderen Endbereich mit einem Außengewindeabschnitt 31 als Schraubendrehergehäuse-Verbindungsmittel versehen. Über den Außengewindeabschnitt 31 steht die Hülse 26 mit einem dazu korrespondierend ausgebildeten Innengewindeabschnitt 32 am axial hinteren Ende des Kupplungseinrichtungsgehäuses 19 in Gewindeeingriff. Auf diese Weise ist die drehelastische Abstützanordnung 13 mit dem Schraubendrehergehäuse 4 über das Kupplungseinrichtungsgehäuse 19 als Zwischenelement verbunden.In addition, the sleeve 26 is provided at its axially front end region with an externally threaded section 31 as a screwdriver housing connecting means. Via the external thread section 31, the sleeve 26 is in threaded engagement with a correspondingly designed internal thread section 32 at the axially rear end of the coupling device housing 19. In this way, the torsionally elastic support arrangement 13 is connected to the screwdriver housing 4 via the coupling device housing 19 as an intermediate element.

Außerdem ist die Drehmomentmesseinrichtung 16 mit der drehelastischen Abstützanordnung 13 verbunden und ausgebildet und/oder eingerichtet, um das Reaktions-Drehmoment axial zwischen den Schraubendrehergehäuse-Verbindungsmitteln und den Antriebsgehäuse-Verbindungsmitteln zu erfassen. Hierzu ist vorliegend auf jede Seitenfläche 30 der Verbindungsstege 28 ein Dehnungsmessstreifen 16a aufgebracht. Die Dehnungsmessstreifen 16a sind derart verschaltet, dass damit ein Reaktions-Drehmoment messbar ist. In einer hier nicht dargestellten weiteren Ausführungsform kann ein einziger Dehnungsmessstreifen 16a vorgesehen sein, der auf eine Seitenfläche 30 eines der Verbindungsstege 28 aufgebracht ist.In addition, the torque measuring device 16 is connected to the torsionally elastic support arrangement 13 and is designed and/or set up to detect the reaction torque axially between the screwdriver housing connecting means and the drive housing connecting means. For this purpose, a strain gauge 16a is applied to each side surface 30 of the connecting webs 28. The strain gauges 16a are connected in such a way that a reaction torque can be measured. In a further embodiment not shown here, a single strain gauge 16a can be provided, which is applied to a side surface 30 of one of the connecting webs 28.

Weiterhin weist der elektrische Schraubendreher 2 eine interne Steuerungselektronik 3b auf, die zusammen mit der externen Steuerungselektronik 3a als Steuerungselektronik 3 der Schraubendreheranordnung 1 bezeichnet wird. Die interne Steuerungselektronik 3b ist innerhalb des axial hinteren Gehäuseabschnitts 4c des Schraubendrehergehäuses 4 angeordnet. Die externe Steuerungselektronik 3a liegt außerhalb des elektrischen Schraubendrehers 2 und umfasst einen Speicher 33 mit darin gespeicherten vordefinierten Solldrehmomenten und eine Benutzerschnittstelle 34 in Form eines berührungsempfindlichen Bildschirms. Die interne Steuerungselektronik 3b ist am axial hinteren Ende des Schraubendrehergehäuses 4 über eine Übertragungsleitung 35 mit der externen Steuerungselektronik 3a verbunden. Die Steuerungselektronik 3 ist mit der Drehmomentmesseinrichtung 16 und dem Motor 8 gekoppelt, um den Motor 8 in Abhängigkeit von Ausgangssignalen der Drehmomentmesseinrichtung 16 auszuschalten. In einer hier nicht dargestellten weiteren Ausführungsform weist die Drehmomentschrauberanordnung 1 lediglich eine interne Steuerungselektronik 3b und keine externe Steuerungselektronik 3a auf. In diesem Fall kann die interne Steuerungselektronik 3b die Aufgaben der externen Steuerungselektronik 3a mitübernehmen. Hierzu kann die interne Steuerungselektronik 3b den Speicher 33 und/oder die Benutzerschnittstelle 34 umfassen.Furthermore, the electric screwdriver 2 has internal control electronics 3b, which together with the external control electronics 3a are referred to as control electronics 3 of the screwdriver arrangement 1. The internal control electronics 3b is arranged within the axially rear housing section 4c of the screwdriver housing 4. The external one Control electronics 3a is located outside the electric screwdriver 2 and includes a memory 33 with predefined target torques stored therein and a user interface 34 in the form of a touch-sensitive screen. The internal control electronics 3b is connected to the external control electronics 3a at the axially rear end of the screwdriver housing 4 via a transmission line 35. The control electronics 3 is coupled to the torque measuring device 16 and the motor 8 in order to switch off the motor 8 depending on output signals from the torque measuring device 16. In a further embodiment not shown here, the torque wrench arrangement 1 only has internal control electronics 3b and no external control electronics 3a. In this case, the internal control electronics 3b can also take over the tasks of the external control electronics 3a. For this purpose, the internal control electronics 3b can include the memory 33 and/or the user interface 34.

Figur 10 zeigt eine drehelastische Abstützanordnung 13 einer Drehmomentschrauberanordnung 1 gemäß einer zweiten Ausführungsform der vorliegenden Erfindung. Die zweite Ausführungsform ist im Wesentlichen identisch zu der ersten Ausführungsform, weshalb im Folgenden nur auf die Unterschiede der zweiten Ausführungsform gegenüber der ersten Ausführungsform eingegangen wird. Figure 10 shows a torsionally elastic support arrangement 13 of a torque wrench arrangement 1 according to a second embodiment of the present invention. The second embodiment is essentially identical to the first embodiment, which is why only the differences between the second embodiment and the first embodiment will be discussed below.

Die zweite Ausführungsform unterscheidet sich von der ersten Ausführungsform lediglich durch eine leicht veränderte Ausgestaltung der drehelastischen Abstützanordnung 13. Denn die Hülse 26 der drehelastischen Abstützanordnung 13 ist an ihrem axial hinteren Endbereich mit dem Befestigungsflansch 22 der drehelastischen Abstützanordnung 13 lediglich über zwei anstatt vier radiale Verbindungsstege 28 verbunden. Hierbei liegen sich die beiden Verbindungsstege 28 radial gegenüber. Zwischen zwei Paaren von in Umfangsrichtung des Befestigungsflansches 22 benachbarten Durchgangsbohrungen 23 sind also keine Verbindungsstege 28 vorgesehen. Diese Bereiche ohne Verbindungsstege 28 liegen sich ebenfalls radial gegenüber. Außerdem umfasst die Drehmomentmesseinrichtung 16 keine Dehnungsmessstreifen 16a, sondern anstatt dessen zwei Messeinrichtungselemente, bei denen es sich um ein magnetfelderzeugendes Element, hier einen Magneten 16b, und ein magnetfeldmessendes Element, hier einen Hallsensor 16c, handelt. Der Magnet 16b ist an einer radial außen liegenden Fläche 36 der Hülse 26 auf einem Podest 37 montiert angeordnet und der Hallsensor 16c ist an einer radial innen liegenden Fläche 38 des ringförmigen Befestigungsflansches 22 auf einem weiteren Podest 39 montiert angeordnet. In einer hier nicht dargestellten weiteren Ausführungsform kann der Magnet 16b an der Fläche 38 und der Hallsensor 16c an der Fläche 36 auf einem jeweiligen Podest 37, 39 montiert angeordnet sein. Der Magnet 16b und der Hallsensor 16c liegen sich direkt gegenüber, berühren sich jedoch nicht. Die Anordnung aus den beiden Podesten 37, 39, dem Magneten 16c und dem Hallsensor 16c befindet sich an einer Position, an der in der ersten Ausführungsform ein weiterer Verbindungssteg 28 vorgesehen ist.The second embodiment differs from the first embodiment only in a slightly modified design of the torsionally elastic support arrangement 13. This is because the sleeve 26 of the torsionally elastic support arrangement 13 is connected at its axially rear end region to the fastening flange 22 of the torsionally elastic support arrangement 13 only via two instead of four radial connecting webs 28 tied together. Here, the two connecting webs 28 lie radially opposite one another. Between two pairs of in No connecting webs 28 are therefore provided in the circumferential direction of the fastening flange 22 adjacent through holes 23. These areas without connecting webs 28 are also radially opposite one another. In addition, the torque measuring device 16 does not include any strain gauges 16a, but instead two measuring device elements, which are a magnetic field generating element, here a magnet 16b, and a magnetic field measuring element, here a Hall sensor 16c. The magnet 16b is mounted on a radially outer surface 36 of the sleeve 26 on a pedestal 37 and the Hall sensor 16c is mounted on a radially inner surface 38 of the annular fastening flange 22 on a further pedestal 39. In a further embodiment not shown here, the magnet 16b can be arranged mounted on the surface 38 and the Hall sensor 16c on the surface 36 on a respective pedestal 37, 39. The magnet 16b and the Hall sensor 16c are directly opposite each other, but do not touch each other. The arrangement of the two platforms 37, 39, the magnet 16c and the Hall sensor 16c is located at a position at which a further connecting web 28 is provided in the first embodiment.

Die Figuren 11 und 12 zeigen eine Abstützanordnung 13 einer Drehmomentschrauberanordnung 1 gemäß einer dritten Ausführungsform der vorliegenden Erfindung. Die dritte Ausführungsform ist im Wesentlichen identisch zu den ersten und zweiten Ausführungsformen, weshalb im Folgenden nur auf die Unterschiede der dritten Ausführungsform gegenüber den ersten und zweiten Ausführungsformen eingegangen wird.The Figures 11 and 12 show a support arrangement 13 of a torque wrench arrangement 1 according to a third embodiment of the present invention. The third embodiment is essentially identical to the first and second embodiments, which is why only the differences between the third embodiment and the first and second embodiments will be discussed below.

Die dritte Ausführungsform unterscheidet sich von den ersten und zweiten Ausführungsformen lediglich durch eine veränderte Ausgestaltung der Abstützanordnung 13. Diese besteht bei der dritten Ausführungsform aus zwei separaten Elementen, weshalb das Antriebsgehäuse 7 über die Abstützanordnung 13 nicht mit dem Schraubendrehergehäuse 4 verbunden ist. Genauer gesagt weist die Abstützanordnung 13 ein antriebsgehäuseseitiges Abstützelement 40 und ein schraubendrehergehäuseseitiges Abstützelement 41 auf, die mit ihren einander zuweisenden Stirnseiten 43, 46 aneinander anliegen. Das antriebsgehäuseseitige Abstützelement 40 ist als ringförmiger Befestigungsflansch 22 mit vier Durchgangsbohrungen 23 als Antriebsgehäuse-Verbindungsmittel und einer zentralen Bohrung 42 ausgebildet. Darüber hinaus ist das antriebsgehäuseseitige Abstützelement 40 an seiner dem schraubendrehergehäuseseitigen Abstützelement 41 zugewandten Stirnseite 43 mit einer Aussparung 44 versehen. Das schraubendrehergehäuseseitige Abstützelement 41 ist als ringförmige Platte 45 ausgebildet, an deren dem antriebsgehäuseseitigen Abstützelement 40 zugewandten Stirnseite 46 ein zu der Aussparung 44 korrespondierend ausgebildeter und in diese hineinragender Vorsprung 47 angeordnet ist. An der gegenüberliegenden Stirnseite 48 der ringförmigen Platte 45 befindet sich ein hülsenartiger Fortsatz 49, der koaxial zu einer zentralen Bohrung 50 der ringförmigen Platte 45 angeordnet ist. Hierbei bilden die zentrale Bohrung 50 der ringförmigen Platte 45, der Fortsatz 49 und die zentrale Bohrung 42 des Befestigungsflansches 22 die zentrale Durchgangsöffnung 27 der Abstützanordnung 13. Der hülsenartige Fortsatz 49 ist mit einem Außengewindeabschnitt 51 als Schraubendrehergehäuse-Verbindungsmittel versehen, über welchen das schraubendrehergehäuseseitige Abstützelement 41 mit dem dazu korrespondierend ausgebildeten Innengewindeabschnitt 32 am axial hinteren Ende des Kupplungseinrichtungsgehäuses 19 in Gewindeeingriff steht.The third embodiment differs from the first and second embodiments only in a modified design of the support arrangement 13. In the third embodiment, this consists of two separate elements, which is why the drive housing 7 over the support arrangement 13 is not connected to the screwdriver housing 4. More precisely, the support arrangement 13 has a drive housing-side support element 40 and a screwdriver housing-side support element 41, which rest against one another with their mutually facing end faces 43, 46. The drive housing-side support element 40 is designed as an annular fastening flange 22 with four through holes 23 as drive housing connecting means and a central hole 42. In addition, the drive housing-side support element 40 is provided with a recess 44 on its end face 43 facing the screwdriver housing-side support element 41. The screwdriver housing-side support element 41 is designed as an annular plate 45, on whose end face 46 facing the drive housing-side support element 40 there is a projection 47 which is designed to correspond to the recess 44 and projects into it. On the opposite end face 48 of the annular plate 45 there is a sleeve-like extension 49 which is arranged coaxially with a central bore 50 in the annular plate 45. Here, the central bore 50 of the annular plate 45, the extension 49 and the central bore 42 of the fastening flange 22 form the central through opening 27 of the support arrangement 13. The sleeve-like extension 49 is provided with an external thread section 51 as a screwdriver housing connecting means, via which the screwdriver housing-side support element 41 is in threaded engagement with the correspondingly designed internal thread section 32 at the axially rear end of the coupling device housing 19.

Bei der dritten Ausführungsform ist jeweils zwischen zwei gegenüberliegenden, in Umfangsrichtung der Abstützanordnung 13 weisenden Seitenflächen 52 der Aussparung 44 und des Vorsprungs 47 ein Spalt 53 gebildet. Die Anordnung ist derart getroffen, dass die Abstützung des Reaktions-Drehmoments in Umfangsrichtung der Abstützanordnung 13 zwischen den Seitenflächen 52 erfolgt. Vorliegend gibt es also insgesamt zwei Spalte 53, in denen jeweils ein Piezoelement 16d der Drehmomentmesseinrichtung 16 angeordnet ist. An der Abstützanordnung 13 gemäß der dritten Ausführungsform sind also Piezoelemente 16d anstatt Dehnungsmessstreifen 16a beziehungsweise anstatt eines Magneten 16b und eines Hallsensors 16c vorgesehen. Genauer gesagt sind die beiden Piezoelemente 16d jeweils an einer zu dem antriebsgehäuseseitigen Abstützelement 40 gehörenden Seitenfläche 52 eines Spalts 53 befestigt.In the third embodiment, a gap 53 is formed between two opposite side surfaces 52 of the recess 44 and the projection 47, which point in the circumferential direction of the support arrangement 13. The arrangement is such that the support of the reaction torque in the circumferential direction of the support arrangement 13 between the side surfaces 52 takes place. In the present case there are a total of two columns 53, in each of which a piezo element 16d of the torque measuring device 16 is arranged. Piezo elements 16d are therefore provided on the support arrangement 13 according to the third embodiment instead of strain gauges 16a or instead of a magnet 16b and a Hall sensor 16c. More precisely, the two piezo elements 16d are each attached to a side surface 52 of a gap 53 belonging to the support element 40 on the drive housing side.

Die Figuren 13 und 14 zeigen schematische Teilschnittansichten der Drehmomentschrauberanordnung 1 gemäß den ersten, zweiten und dritten Ausführungsformen. Diese sollen lediglich dazu dienen, die Lage der Abstützstelle 14 zu verdeutlichen. Im Falle der ersten, zweiten und dritten Ausführungsformen liegt die Abstützstelle 14 am axial vorderen Ende des Antriebsgehäuses 7. Konkret ist die Abstützanordnung 13 zwischen der axial vorderen Stirnseite des Antriebsgehäuses 7 und dem Schraubendrehergehäuse 4 angeordnet.The Figures 13 and 14 show schematic partial sectional views of the torque wrench assembly 1 according to the first, second and third embodiments. These are only intended to clarify the location of the support point 14. In the case of the first, second and third embodiments, the support point 14 is located at the axially front end of the drive housing 7. Specifically, the support arrangement 13 is arranged between the axially front end face of the drive housing 7 and the screwdriver housing 4.

Figur 15 zeigt eine schematische Teilschnittansicht einer Drehmomentschrauberanordnung 1 gemäß einer vierten Ausführungsform der vorliegenden Erfindung. Die vierte Ausführungsform unterscheidet sich von den ersten, zweiten und dritten Ausführungsformen dadurch, dass die Abstützstelle 14 am axial hinteren Ende des Antriebsgehäuses 7 liegt. Bei der Abstützanordnung 13, über welche das auf das Antriebsgehäuse 7 ausgeübte Reaktions-Drehmoment an der Abstützstelle 14 an dem Schraubendrehergehäuse 4 abgestützt wird, handelt es sich beispielsweise um eine der im Zusammenhang mit den ersten drei Ausführungsformen beschriebenen Abstützanordnungen 13. Bei der vierten Ausführungsform der Erfindung ist das Antriebsgehäuse 7 entsprechend an seinem axial vorderen Ende drehbar im Schraubendrehergehäuse 4 gelagert. Figure 15 shows a schematic partial sectional view of a torque wrench assembly 1 according to a fourth embodiment of the present invention. The fourth embodiment differs from the first, second and third embodiments in that the support point 14 is located at the axially rear end of the drive housing 7. The support arrangement 13, via which the reaction torque exerted on the drive housing 7 is supported at the support point 14 on the screwdriver housing 4, is, for example, one of the support arrangements 13 described in connection with the first three embodiments According to the invention, the drive housing 7 is rotatably mounted in the screwdriver housing 4 at its axially front end.

Die erfindungsgemäße Drehmomentschrauberanordnung 1 gemäß der zuvor beschriebenen vier Ausführungsformen kann nach dem im Folgenden erläuterten Verfahren betrieben werden.The torque wrench arrangement 1 according to the invention according to the four embodiments described above can be operated according to the method explained below.

An der externen Steuerungselektronik 3a kann ein Benutzer über die Benutzerschnittstelle 34 zunächst ein gewünschtes Solldrehmoment einstellen, indem er das gewünschte Solldrehmoment eingibt oder aus mehreren vordefinierten und in dem Speicher 33 gespeicherten Auswahlmöglichkeiten auswählt. Im Anschluss daran wird der Schraubendreher 2 durch den Benutzer mit einem in der Bitaufnahme 12 des Bithalters 11 fixierten Schraubbit gegen eine zu drehende Schraube gepresst und der Schraubendreher 2 entweder automatisch bei Erreichen einer gewünschten Anpresskraft oder manuell durch den Benutzer aktiviert, also der Motor 8 eingeschaltet. Der Übersichtlichkeit halber sind in den Figuren weder der Schraubbit, noch die Schraube dargestellt.On the external control electronics 3a, a user can first set a desired target torque via the user interface 34 by entering the desired target torque or selecting from several predefined selection options stored in the memory 33. The screwdriver 2 is then pressed by the user against a screw to be turned using a screw bit fixed in the bit holder 12 of the bit holder 11 and the screwdriver 2 is activated either automatically when a desired contact pressure is reached or manually by the user, i.e. the motor 8 is switched on . For the sake of clarity, neither the screw bit nor the screw are shown in the figures.

Beim Drehen der Schraube mittels des Schraubendrehers 2 wird durch das Abtriebs-Drehmoment der Abtriebswelle 10 ein auf das Antriebsgehäuse 7 ausgeübtes Reaktions-Drehmoment bewirkt, welches an der Abstützstelle zwischen dem Antriebsgehäuse 7 und dem Schraubendrehergehäuse 4 über die Abstützanordnung 13 abgestützt wird. Mittels der Drehmomentmesseinrichtung 16 wird das Abtriebs-Drehmoment der Abtriebswelle 10 in Form des abgestützten Reaktions-Drehmoments an der Abstützanordnung 13 erfasst. Beispielsweise im Falle der ersten Ausführungsform der Erfindung, also im Falle des Einsatzes von Dehnungsmessstreifen 16a, erfolgt die Drehmomenterfassung über die Messung einer Verformung der drehelastischen Abstützanordnung 13, insbesondere der Verbindungsstege 28 oder des Befestigungsflansches 22. Beispielsweise im Falle der zweiten Ausführungsform der Erfindung, also im Falle des Einsatzes eines Magneten 16b und eines Hallsensors 16c, erfolgt die Drehmomenterfassung über die Messung einer Verschiebung und/oder Verdrehung des Magneten 16b und des Hallsensors 16c in Umfangsrichtung der drehelastischen Abstützanordnung 13 relativ zueinander bei einer rotatorischen Auslenkung der drehelastischen Abstützanordnung 13, also einem gegeneinander Verdrehen der Hülse 26 und des Befestigungsflansches 22. Im Falle der dritten Ausführungsform der Erfindung, also im Falle des Einsatzes von Piezoelementen 16d, erfolgt die Drehmomenterfassung, indem bei einer Verringerung der Breite eines Spaltes 53 bei einem gegeneinander Verdrehen der beiden Abstützelemente 40, 41 ein Druck auf das in dem Spalt 53 angeordnete Pizeoelement 16d ausgeübt wird, der als elektrisches Signal detektierbar ist. Auf diese Weise lässt sich das Abtriebs-Drehmoment über das Reaktions-Drehmoment verglichen mit vorbekannten Drehmomentschrauberanordnungen deutlich präziser erfassen. Bei Bedarf kann die Messung noch mit einem erfassten Motorstrom des Motors 8 verglichen werden.When turning the screw using the screwdriver 2, the output torque of the output shaft 10 causes a reaction torque to be exerted on the drive housing 7, which is supported at the support point between the drive housing 7 and the screwdriver housing 4 via the support arrangement 13. By means of the torque measuring device 16, the output torque of the output shaft 10 is recorded in the form of the supported reaction torque on the support arrangement 13. For example, in the case of the first embodiment of the invention, i.e. in the case of using strain gauges 16a, the torque is detected by measuring a deformation of the torsionally elastic support arrangement 13, in particular the connecting webs 28 or the fastening flange 22. For example in the case of the second embodiment of the invention, i.e in the case of using a magnet 16b and one Hall sensor 16c, the torque is detected by measuring a displacement and/or rotation of the magnet 16b and the Hall sensor 16c in the circumferential direction of the torsionally elastic support arrangement 13 relative to one another during a rotational deflection of the torsionally elastic support arrangement 13, i.e. a rotation of the sleeve 26 and the fastening flange 22 against one another In the case of the third embodiment of the invention, i.e. in the case of the use of piezo elements 16d, the torque is detected by applying pressure to the support elements 40, 41 arranged in the gap 53 when the width of a gap 53 is reduced and the two support elements 40, 41 are rotated relative to one another Pizeoelement 16d is exerted, which can be detected as an electrical signal. In this way, the output torque can be recorded much more precisely via the reaction torque compared to previously known torque wrench arrangements. If necessary, the measurement can be compared with a recorded motor current of the motor 8.

Das erfasste Reaktions-Drehmoment wird dann mittels der Steuerungselektronik 3 mit dem voreingestellten gewünschten Solldrehmoment verglichen. Sobald das Solldrehmoment erreicht oder überschritten ist, bewirkt die Steuerungselektronik 3 eine automatische Abschaltung des Motors 8. Auf diese Weise können Beschädigungen einer mittels der Drehmomentschrauberanordnung 1 hergestellten Schraubverbindung vermieden werden.The detected reaction torque is then compared with the preset desired target torque by means of the control electronics 3. As soon as the target torque is reached or exceeded, the control electronics 3 causes the motor 8 to be switched off automatically. In this way, damage to a screw connection produced by means of the torque wrench arrangement 1 can be avoided.

Bei Bedarf kann eine Kalibrierung der Drehmomentschrauberanordnung 1 insbesondere über die Steuerungselektronik 3 erfolgen. Hierbei wird ein zertifiziertes Messverfahren verwendet, welches mit den erfassten Messwerten aus dem Schraubendreher 2 verglichen wird. Je nach Höhe der Abweichung der Messwerte werden dann die erfassten Messwerte des Schraubendrehers 2 angepasst.If necessary, the torque wrench arrangement 1 can be calibrated, in particular via the control electronics 3. A certified measuring method is used, which is compared with the measured values recorded from the screwdriver 2. Depending on the extent of the deviation in the measured values, the measured values recorded by the screwdriver 2 are then adjusted.

Figur 16 zeigt den Zusammenhang zwischen dem Abtriebs-Drehmoment Mab der Abtriebswelle 10 und dem mittels der Drehmomentmesseinrichtung 16 erfassten Reaktions-Drehmoments M, wobei gilt: M = - Mab Figure 16 shows the relationship between the output torque M from the output shaft 10 and the reaction torque M detected by means of the torque measuring device 16, where the following applies: M = - M from

BezugszeichenlisteReference symbol list

11
DrehmomentschrauberanordnungTorque wrench assembly
22
Schraubendreherscrewdriver
33
SteuerungselektronikControl electronics
3a3a
externe Steuerungselektronikexternal control electronics
3b3b
interne Steuerungselektronikinternal control electronics
44
SchraubendrehergehäuseScrewdriver case
4a4a
axial vorderer Gehäuseabschnittaxial front housing section
4b4b
mittlerer Gehäuseabschnittmiddle section of the housing
4c4c
axial hinterer Gehäuseabschnittaxially rear housing section
55
AntriebsstrangDrivetrain
66
Spaltgap
77
AntriebsgehäuseDrive housing
7a7a
axial hinterer Teil des Antriebsgehäusesaxially rear part of the drive housing
7b7b
axial vorderer Teil des Antriebsgehäusesaxially front part of the drive housing
88th
Motorengine
99
Getriebetransmission
1010
Abtriebswelleoutput shaft
1111
BithalterBit holder
1212
BitaufnahmeBit recording
1313
AbstützanordnungSupport arrangement
1414
AbstützstelleSupport point
1515
WalzlagerRoller bearing
1616
DrehmomentmesseinrichtungTorque measuring device
16a16a
DehnungsmessstreifenStrain gauges
16b16b
Magnetmagnet
16c16c
HallsensorHall sensor
16d16d
PiezoelementPiezo element
1717
KupplungseinrichtungCoupling device
1818
LageranordnungStorage arrangement
1919
KupplungseinrichtungsgehäuseClutch device housing
2020
Verschraubungsstellescrew connection point
2121
elastische Rückstellmittelelastic restoring means
2222
Befestigungsflanschmounting flange
2323
DurchgangsbohrungThrough hole
23a23a
Abschnitt kleineren DurchmessersSmaller diameter section
23b23b
Abschnitt größeren DurchmessersLarger diameter section
2424
BefestigungsschraubeFastening screw
2525
Schraubenkopfscrew head
2626
Hülsesleeve
2727
zentrale Durchgangsöffnung der Abstützanordnungcentral through opening of the support arrangement
2828
Verbindungsstegconnecting bridge
2929
Spaltgap
3030
Seitenflächeside surface
3131
AußengewindeabschnittMale thread section
3232
InnengewindeabschnittInternal thread section
3333
SpeicherStorage
3434
BenutzerschnittstelleUser interface
3535
Übertragungsleitungtransmission line
3636
FlächeArea
3737
PodestPedestal
3838
FlächeArea
3939
PodestPedestal
4040
antriebsgehäuseseitiges AbstützelementDrive housing side support element
4141
schraubendrehergehäuseseitiges Abstützelementscrewdriver housing side support element
4242
zentrale Bohrung des Befestigungsflanschescentral hole in the mounting flange
4343
Stirnseitefront side
4444
Aussparungrecess
4545
ringförmige Platteannular plate
4646
Stirnseitefront side
4747
Vorsprunghead Start
4848
Stirnseitefront side
4949
hülsenartiger Fortsatzsleeve-like extension
5050
zentrale Bohrung der ringförmigen Plattecentral hole in the annular plate
5151
AußengewindeabschnittMale thread section
5252
Seitenflächeside surface
5353
Spaltgap

Claims (16)

  1. Torque screwdriver arrangement (1) with a screwdriver housing (4), a drive train (5) arranged in the screwdriver housing (4), which has a drive housing (7), a motor (8), in particular an electric motor, arranged in the drive housing (7), and an output shaft (10), which projects out of the drive housing (7) at its axially front end face and whose axially front end comprises a bit holder (11) for fixing a screw bit or can be connected in a rotationally fixed manner to such a bit holder, and a torque measuring device (16), wherein a support arrangement (13) is provided at precisely one support point (14), via which the reaction torque exerted on the drive housing (7) during operation of the torque screwdriver arrangement (1) is supported on the screwdriver housing (4), and the drive housing (7) is otherwise provided or mounted rotatably in the screwdriver housing (4), and wherein the torque measuring device (16), which is provided in particular on the support arrangement (13), is designed and/or set up to detect the output torque of the output shaft (10) in the form of the supported reaction torque at the support arrangement (13), characterized in that the drive housing (7) is connected to the screwdriver housing (4) at the support point (14) via the support arrangement (13),
    in that the support arrangement (13) has drive housing connecting means which are designed and/or set up to connect the support arrangement (13) releasably to the drive housing (7), and comprises screwdriver housing connecting means which are designed and/or set up to connect the support arrangement (13) to the screwdriver housing (4) or to an intermediate element provided between the screwdriver housing (4) and the support arrangement (13),
    in that the support arrangement (13) is designed as a torsionally elastic support arrangement (13) and comprises a sleeve (26) on which the screwdriver housing connecting means are formed, and an outer ring which has the drive housing connecting means and radially surrounds the sleeve (26), the sleeve (26) and the outer ring preferably being torsionally elastically connected to one another via radial connecting webs (28), and
    in that the sleeve (26) is connected to the outer ring at one axial end region, in particular its axially rear end region, via the connecting webs (28) and is provided at the opposite axial end region, in particular its axially front end region, with an internal or external threaded section (31) as screwdriver housing connecting means, via which the torsionally elastic support arrangement (13) is in threaded engagement with an inner or outer threaded portion (32), designed to correspond thereto, of the screwdriver housing (4) or of an intermediate element provided between the torsionally elastic support arrangement (13) and the screwdriver housing (4), the corresponding inner or outer threaded portion (32) being provided in particular at the axially rear end of the intermediate portion.
  2. Torque screwdriver arrangement (1) according to claim 1, characterized in that the support arrangement (13) is arranged between an axial end of the drive housing (7), preferably an axial end face of the drive housing (7), and the screwdriver housing (4), and the drive housing (7) is rotatably mounted in the screwdriver housing (4), in particular at its end axially opposite the support arrangement (13), preferably at the end face, via a bearing, in particular a roller bearing (15), preferably a deep groove ball bearing.
  3. Torque screwdriver arrangement (1) according to claim 1 or 2, characterized in that the support arrangement (13) is connected to the screwdriver housing (4) via an intermediate element, preferably the intermediate element being detachably connected, in particular screwed, to the support arrangement (13) and/or the screwdriver housing (4).
  4. Torque screwdriver arrangement (1) according to one of the claims 1 to 3, characterized in that a coupling device (17) is provided, via which a bit holder (11) is connected to the output shaft (10), in particular the axially front end of the output shaft (10), but axially displaceable relative thereto, wherein the coupling device (17) is connected, preferably detachably connected, in particular screwed, to the output shaft (10) and the axially rear end of the bit holder (11) is in rotationally fixed but axially displaceable engagement with the coupling device (17), wherein in particular elastic restoring means (21), such as a helical compression spring, a disk spring and/or a rubber spring, are provided, which are supported between the coupling device (17) and the bit holder (11) and press the bit holder (11) into an axially forward starting position, wherein the elastic restoring means (21) preferably engage around the bit holder (11) in order to be supported by the latter on the inside.
  5. Torque screwdriver arrangement (1) according to claim 4, characterized in that the coupling device (17) is surrounded by a coupling device housing (19) which is arranged in the axially front end section of the screwdriver housing (4) and is detachably connected, in particular screwed, thereto, the supporting arrangement (13) preferably being connected to the screwdriver housing (4) via the coupling device housing (19) as an intermediate element.
  6. Torque screwdriver arrangement (1) according to any one of the preceding claims, characterized in that the torque measuring device (16) is designed and/or arranged to detect the reaction torque axially between the screwdriver housing connecting means and the drive housing connecting means, and/or
    in that at least one connecting web (28) comprises the torque measuring device (16) or a part thereof or consists of the torque measuring device (16) or is connected to the torque measuring device (16) or a part thereof and/or
    in that the sleeve (26) and the outer ring are connected to one another exclusively via the radial connecting webs (28) and are otherwise spaced apart from one another by a gap (29), the gap (29) being in particular at least partially filled with an elastic mass.
  7. Torque screwdriver arrangement (1) according to one of the previous claims, characterized in that the support arrangement (13) comprises, as drive housing connection means, an annular, in particular circular, fastening flange (22), which in particular forms the outer ring of the drive housing connection means, which has, between its two end faces, through-holes (23), via which the fastening flange (22) is connected to an end face of the drive housing (7).
  8. Torque screwdriver arrangement (1) according to one of the previous claims, characterized in that the support arrangement (13) comprises a drive housing-side support element (40), on which the drive housing connecting means are provided, and a screwdriver housing-side support element (41), on which the screwdriver housing connecting means are provided, and one of the two support elements (40, 41) is provided with at least one recess (44) and the other supporting element (40, 41) is provided with at least one projection (47) corresponding thereto and projecting into the recess (44), a gap (53) being formed in each case between two opposing side faces (52), pointing in the circumferential direction of the supporting arrangement (13), of a recess (44) and of an associated projection (47), and the arrangement is made in such a way that the reaction torque is supported in the circumferential direction of the support arrangement (13) between the side faces (52), wherein in particular in at least one gap (53) a part of the torque measuring device (16), in particular at least one piezoelectric element (16d) and/or piezoelectric sensor and/or piezoresistive sensor of the torque measuring device (16), is arranged, preferably fastened, to at least one of the two side surfaces (52) in such a way that, in the event of a reduction in the width of the gap (53), when the two supporting elements (40, 41) are rotated relative to one another, a pressure is exerted on the part of the torque measuring device (16) arranged in the gap (53), which pressure can be detected as an electrical signal.
  9. Torque screwdriver arrangement (1) according to claim 8, characterized in that the drive housing-side support element (40) is designed as an annular fastening flange (22) and/or the screwdriver housing-side support element (41) is designed as an annular plate (45), on whose end face (46) facing the drive housing-side support element (40) the at least one projection (47) or the at least one depression is arranged and on whose opposite end face (48) a sleeve-like extension (49) is located, which is arranged coaxially with a central bore (50) of the annular plate (45),
    wherein in particular the sleeve-like extension (49) is provided with an internally or externally threaded portion (51) as screwdriver housing connecting means, via which the screwdriver housing-side support element (41) is in threaded engagement with a correspondingly formed internal or external threaded portion (32) of the screwdriver housing (4) or of an intermediate element provided between the screwdriver housing-side support element (41) and the screwdriver housing (4).
  10. Torque screwdriver arrangement (1) according to any one of the preceding claims, characterized in that the support arrangement (13) comprises a central through opening (27) defined by the sleeve (26) through which in particular a part of the output shaft (10) extends and/or into which in particular the output shaft (10) projects, and the sleeve (26) and the outer ring are connected to one another exclusively via the radial connecting webs (28) and are otherwise spaced apart from one another by a gap (29), the gap (29) being in particular at least partially filled with an elastic mass.
  11. Torque screwdriver arrangement (1) according to claims 9 and 10, characterized in that the bore (50) and the extension (49) form part of the central through-opening (27) of the support assembly (13).
  12. Torque screwdriver arrangement (1) according to one of the preceding claims, characterized in that the torque measuring device (16) comprises at least one strain gauge (16a) which is arranged and/or connected in such a way that a torque can be measured with it and which is preferably connected according to the principle of the Wheatstone bridge to form one or more quarter, half and/or full bridges, where, in particular, a plurality of bridges are connected to one another in series, in parallel and/or mixed, wherein preferably the at least one strain gauge (16a) is applied to a side face (30) of a connecting web (28) facing in the circumferential direction of the torsionally elastic support arrangement (13), wherein in particular at least one strain gauge (16a) is applied in each case to the side faces (30) of the connecting webs (28) facing in the circumferential direction of the torsionally elastic support arrangement (13).
  13. Torque screwdriver arrangement (1) according to one of the preceding claims, characterized in that the side surfaces (30) of the connecting webs (28) facing in the circumferential direction of the torsionally elastic support arrangement (13) are designed as planar surfaces and/or the connecting webs (28) in the circumferential direction of the torsionally elastic support arrangement (13) each have an at least substantially uniform thickness and/or the connecting webs (28) are arranged at a uniform distance from one another in the circumferential direction of the torsionally elastic support arrangement (13).
  14. Torque screwdriver arrangement (1) according to one of the preceding claims, characterized in that the torque measuring device (16) comprises at least one sensor, such as a resistance sensor and/or an electromagnetic sensor and/or a Hall sensor (16c) and/or a magnetoresistive sensor and/or a galvanomagnetic sensor and/or an optoelectronic sensor and/or a sensor, which is designed and/or set up to detect a torsion angle and/or a position and/or a deformation and/or a twist and/or a torsion and/or a shear force and/or a shear of the in particular torsionally elastic support arrangement (13), in particular of a region of the support arrangement (13), and/or of the drive housing (7), and/or
    in that the torque measuring device (16) comprises at least two measuring device elements which are designed and/or arranged in such a way that they are displaced relative to one another in the event of a rotational deflection of the, in particular, rotationally elastic support arrangement (13), and at least one of which is a sensor or part of a sensor, the measuring device elements being, in particular, a magnetic-field-generating element (16b) and a magnetic-field-measuring element, such as a Hall sensor (16c) and/or a magnetoresistive element, and/or
    in that a measuring device element of the torque measuring device (16) is arranged on a radially outer surface (36) of the sleeve (26), in particular mounted on a pedestal (37), and a further measuring device element of the torque measuring device (16) is arranged on a radially inner surface (38) of the outer ring, preferably of the annular mounting flange (22), in particular mounted on a pedestal (39), or vice versa, wherein the two measuring device elements of the torque measuring device (16) are opposite each other, in particular, however, do not touch each other, and the torque measuring device (16) is designed and/or arranged to detect a displacement of its two measuring device elements in the circumferential direction of the torsionally elastic support arrangement (13) relative to each other upon a twisting of the sleeve (26) and the outer ring, in particular, of the fastening flange (22), and wherein preferably,
    the arrangement of the two opposing measuring device elements of the torque measuring device (16) is provided instead of a connecting web (28) and the arrangement is positioned in the circumferential direction of the torsionally elastic support arrangement (13), in particular between two adjacent through holes (23) of the fastening flange (22).
  15. Torque screwdriver arrangement (1) according to one of the previous claims, characterized in that control electronics (3) are provided which are coupled to the torque measuring device (16) and the motor (8) in order to switch off the motor (8) as a function of output signals of the torque measuring device (16), wherein
    the control electronics (3) are in particular internal control electronics (3b) arranged on the screwdriver housing (4), in particular at least partially arranged inside the screwdriver housing (4), external control electronics (3a) arranged remotely from the screwdriver housing (4) and/or a higher-level controller.
  16. Torque screwdriver arrangement (1) according to one of the preceding claims, characterized in that the drive housing (7) is separated from the screwdriver housing (4) in the radial direction by a gap (6), and/or
    in that the drive train (5) has a gear unit (9) which adjoins the axially front end of the motor (8) and is arranged in the drive housing (7).
EP20710077.7A 2019-03-08 2020-02-28 Torque screwdriver arrangement and method for operating a torque screwdriver arrangement of this kind Active EP3820649B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202019101333.8U DE202019101333U1 (en) 2019-03-08 2019-03-08 A torque wrench assembly for operating such a torque wrench assembly
PCT/EP2020/055348 WO2020182501A1 (en) 2019-03-08 2020-02-28 Torque screwdriver arrangement and method for operating a torque screwdriver arrangement of this kind

Publications (2)

Publication Number Publication Date
EP3820649A1 EP3820649A1 (en) 2021-05-19
EP3820649B1 true EP3820649B1 (en) 2023-12-13

Family

ID=67068368

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20710077.7A Active EP3820649B1 (en) 2019-03-08 2020-02-28 Torque screwdriver arrangement and method for operating a torque screwdriver arrangement of this kind

Country Status (4)

Country Link
US (1) US20220176526A1 (en)
EP (1) EP3820649B1 (en)
DE (1) DE202019101333U1 (en)
WO (1) WO2020182501A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4029651A1 (en) * 2021-01-18 2022-07-20 Johannes Lübbering GmbH Screwing device with angular gear and integrated torque detection means
CN112743323B (en) * 2021-01-27 2023-10-27 马杰斌 Part assembling device for production of cross screw driver

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3142682C2 (en) * 1981-10-28 1986-06-19 Black & Decker, Inc. (Eine Gesellschaft N.D.Ges.D. Staates Delaware), Newark, Del. Power tools, in particular hand tools
JPS5893474U (en) * 1981-12-19 1983-06-24 日本電気精器株式会社 electric screwdriver
DE20209850U1 (en) * 2002-06-25 2002-09-19 Wille Gmbh & Co Torque sensor with bars
JP5201842B2 (en) 2007-01-29 2013-06-05 勝行 戸津 Screwdriver torque detection device for electric screwdriver
US10675913B2 (en) * 2016-06-24 2020-06-09 Specialized Bicycle Components, Inc. Bicycle wheel hub with power meter
DE102016010552B3 (en) * 2016-08-31 2017-11-09 Sensodrive Gmbh Torque sensor with sealing membrane
DE102018124402A1 (en) * 2018-10-02 2020-04-02 DSM Meßtechnik GmbH Electronic screwing tool
DE202019100283U1 (en) * 2019-01-18 2019-01-28 Kilews Industrial Co., Ltd. Torque control device for an electric screwdriver

Also Published As

Publication number Publication date
WO2020182501A1 (en) 2020-09-17
US20220176526A1 (en) 2022-06-09
DE202019101333U1 (en) 2019-06-06
EP3820649A1 (en) 2021-05-19

Similar Documents

Publication Publication Date Title
EP1754566B1 (en) Turntable with stepping drive
DE69922169T2 (en) TORQUE SENSOR FOR A TURNING SHAFT
DE69836444T2 (en) Electronic aircraft brake system with wear measurement, clearance adjustment and multiple electric motor actuators
EP0699508B1 (en) Hydraulic impact screwdriver especially for tightening threaded connection
EP3507580B1 (en) Torque sensor with a radially elastic torque transfer
EP2981796B1 (en) Force-measuring device
EP3820649B1 (en) Torque screwdriver arrangement and method for operating a torque screwdriver arrangement of this kind
DE69922168T2 (en) TORQUE SENSOR AND STEERING COLUMN WITH SUCH A SENSOR
EP3507582B1 (en) Torque sensor with seal membrane
EP3114449A1 (en) Component with at least one measuring element comprising a sensor
DE102017126906A1 (en) Achsrotations torque sensor
EP0042548B1 (en) Screwing device with torque detection
DE202006001458U1 (en) Ball bearing internal friction measuring device, has actuator, arranged between bearings, responding to measured value sensor for detecting friction and actuating over one bearing ring under influence of testing load on another bearing ring
EP1564522A2 (en) Micrometer
WO2005115686A1 (en) Clamping device
WO2020211891A1 (en) Manual-force actuator having a sensor system for torque detection
DE102021109860B3 (en) Bolt clamping force converter for bolt tightening operation
EP2894448B1 (en) Device for detecting the status of a machine element
EP1292809B1 (en) Sensor for recording extension and stress in solid materials
EP0824673A2 (en) Device for detecting forces acting on a measuring head and its use
EP1652749B1 (en) Determining of a driver hand torque in a hydraulic power steering device
DE202019100283U1 (en) Torque control device for an electric screwdriver
EP3663046A1 (en) Screw driver assembly and method for operating same
DE102018107320B4 (en) Force measuring device
EP2103410B1 (en) Plastic injection moulding machine with injection force measuring device

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

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

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

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

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

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

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

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20210126

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

RIN1 Information on inventor provided before grant (corrected)

Inventor name: USHAKOV, ANDREAS

Inventor name: LAZAR, ANDREAS

Inventor name: UTZENRATH, MARC

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20230707

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

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

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502020006379

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

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

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240314

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

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

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20231213

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

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

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

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240314

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

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

Ref country code: DE

Payment date: 20240123

Year of fee payment: 5

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

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

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

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213