EP3820649B1 - Ensemble de visseuse dynamométrique et procédé de fonctionnement d'un tel ensemble de visseuse dynamométrique - Google Patents

Ensemble de visseuse dynamométrique et procédé de fonctionnement d'un tel ensemble de visseuse dynamométrique Download PDF

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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
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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
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German (de)
English (en)
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EP3820649A1 (fr
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
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Swedex Industrieprodukte GmbH
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Publication of EP3820649A1 publication Critical patent/EP3820649A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose

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.

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

Claims (16)

  1. Arrangement de tournevis dynamométrique (1) avec un boîtier de tournevis (4), une chaîne d'entraînement (5) disposée dans le boîtier de tournevis (4), qui présente un boîtier d'entraînement (7), un moteur (8), en particulier un moteur électrique, disposé dans le boîtier d'entraînement (7), et un arbre de sortie (10), qui dépasse du boîtier d'entraînement (7) sur son côté frontal axialement avant et dont l'extrémité axialement avant comprend un porte-embout (11) pour la fixation d'un embout de vissage ou peut être relié à un tel porte-embout de manière solidaire en rotation, et un dispositif de mesure de torque (16), un arrangement d'appui (13) étant prévu en exactement un point d'appui (14), par l'intermédiaire duquel le torque de réaction exercé sur le boîtier d'entraînement (7) pendant le fonctionnement de l'arrangement de tournevis dynamométrique (1) s'appuie sur le boîtier de tournevis (4), et le boîtier d'entraînement (7) étant par ailleurs prévu ou logé de manière à pouvoir tourner dans le boîtier de tournevis (4), et le dispositif de mesure de torque(16), qui est en particulier prévu sur l'arrangement d'appui (13), est conçu et/ou agencé pour détecter le torque de sortie de l'arbre de sortie (10) sous la forme du torque de réaction supporté sur l'arrangement d'appui (13), caractérisé en ce que le boîtier d'entraînement (7) est relié au boîtier de tournevis (4) au niveau du point d'appui (14) par l'intermédiaire de l'arrangement d'appui (13),
    en ce que l'arrangement d'appui (13) présente des moyens de liaison de boîtier d'entraînement qui sont conçus et/ou aménagés pour relier de manière amovible l'arrangement d'appui (13) au boîtier d'entraînement (7), et comprend des moyens de liaison de boîtier de tournevis qui sont conçus et/ou aménagés pour relier l'arrangement d'appui (13) au boîtier de tournevis (4) ou à un élément intermédiaire prévu entre le boîtier de tournevis (4) et l'arrangement d'appui (13),
    en ce que l'arrangement d'appui (13) est réalisé sous forme d' arrangement d'appui (13) élastique en rotation et comprend une douille (26), sur laquelle sont réalisés les moyens de liaison du boîtier de tournevis, et une bague extérieure présentant les moyens de liaison du boîtier d'entraînement, qui entoure radialement la douille (26), la douille (26) et la bague extérieure étant reliées l'une à l'autre de préférence de manière élastique en rotation par l'intermédiaire de nervures de liaison radiales (28), et
    en ce que la douille (26) est reliée à la bague extérieure dans une zone d'extrémité axiale, en particulier dans sa zone d'extrémité axiale arrière, par l'intermédiaire des nervures de liaison (28), et est pourvue, dans la zone d'extrémité axiale opposée, en particulier dans sa zone d'extrémité axiale avant, d'un tronçon fileté intérieur ou extérieur (31) servant de moyen de liaison du boîtier de tournevis, par l'intermédiaire duquel l'arrangement d'appui (13) élastique en rotation est en prise par filetage avec un tronçon fileté intérieur ou extérieur (32), réalisé de manière correspondante, du boîtier de tournevis (4) ou d'un élément intermédiaire prévu entre l'arrangement d'appui (13) élastique en rotation et le boîtier de tournevis (4), le tronçon fileté intérieur ou extérieur (32) correspondant étant prévu en particulier à l'extrémité axiale arrière du tronçon intermédiaire.
  2. Arrangement de tournevis dynamométrique (1) selon la revendication 1, caractérisé en ce que l'arrangement d'appui (13) est disposé entre une extrémité axiale du boîtier d'entraînement (7), de préférence une face frontale axiale du boîtier d'entraînement (7), et le boîtier de tournevis (4), et le boîtier d'entraînement (7) est monté de manière à pouvoir tourner dans le boîtier de tournevis (4), en particulier à son extrémité axialement opposée à l'arrangement d'appui (13), de préférence sur le côté frontal, par l'intermédiaire d'un palier, en particulier un palier à rouleau (15), de préférence d'un roulement à billes rainuré.
  3. Arrangement de tournevis dynamométrique (1) selon la revendication 1 ou 2, caractérisé en ce que l'arrangement d'appui (13) est relié au boîtier de tournevis (4) par un élément intermédiaire, l'élément intermédiaire étant de préférence relié de manière amovible, en particulier vissé, à l' l'arrangement d'appui (13) et/ou au boîtier de tournevis (4).
  4. Arrangement de tournevis dynamométrique (1) selon l'une des revendications 1 à 3, caractérisé en ce qu'il est prévu un dispositif d'accouplement (17) par lequel un porte-embout (11) est relié à l'arbre de sortie (10), en particulier à l'extrémité avant axiale de l'arbre de sortie (10), bloqué en rotation mais déplaçable axialement par rapport à celui-ci, le dispositif d'accouplement (17) étant relié à l'arbre de sortie (10), de préférence de manière amovible, en particulier par vissage, et l'extrémité axialement arrière du porte-embout (11) étant en prise avec le dispositif d'accouplement (17) de manière solidaire en rotation, mais déplaçable axialement, des moyens de rappel élastiques (21), tels qu'un ressort de compression hélicoïdal, une rondelle-ressort et/ou un ressort en caoutchouc, étant notamment prévus, lesquels s'appuient entre le dispositif d'accouplement (17) et le porte-embout (11) et poussent le porte-embout (11) dans une position de départ axialement avant, les moyens de rappel élastiques (21) entourant de préférence le porte-embout (11) pour être soutenus par celui-ci du côté intérieur.
  5. Arrangement de tournevis dynamométrique (1) selon la revendication 4, caractérisé en ce que le dispositif d'accouplement (17) est entouré d'un boîtier de dispositif d'accouplement (19) qui est disposé dans la partie d'extrémité axialement avant du boîtier de tournevis (4) et est relié de manière amovible, en particulier par vissage, à ce dernier, l'arrangement d'appui (13) étant de préférence relié au boîtier de tournevis (4) par le boîtier de dispositif d'accouplement (19) en tant qu'élément intermédiaire.
  6. Arrangement de tournevis dynamométrique (1) selon l'une des revendications précédentes, caractérisé en ce que le dispositif de mesure de torque (16) est conçu et/ou agencé pour détecter le torque de réaction axialement entre les moyens de liaison du boîtier de tournevis et les moyens de liaison du boîtier d'entraînement, et/ou
    en ce qu'au moins une nervure de liaison (28) comprend le dispositif de mesure de torque (16) ou une partie de celui-ci ou est constituée du dispositif de mesure de torque (16) ou est reliée au dispositif de mesure de torque (16) ou à une partie de celui-ci, et/ou
    en ce que la douille (26) et la bague extérieure sont reliées l'une à l'autre exclusivement par les nervures de liaison radiales (28) et sont par ailleurs espacées l'une de l'autre par une fente (29), la fente (29) étant en particulier remplie au moins partiellement d'une masse élastique.
  7. Arrangement et de tournevis dynamométrique (1) selon l'une des revendications précédentes, caractérisé en ce que l'arrangement d'appui (13) comprend, en tant que moyen de liaison du boîtier d'entraînement, une bride de fixation (22) annulaire, en particulier circulaire, qui forme en particulier la bague extérieure du moyen de liaison du carter d'entraînement et qui présente entre ses deux faces frontales des trous traversants (23) par lesquels la bride de fixation (22) est reliée à une face frontale du boîtier d'entraînement (7).
  8. Arrangement de tournevis dynamométrique (1) selon l'une des revendications précédentes, caractérisé en ce que l'arrangement d'appui (13) comporte un élément d'appui (40) côté boîtier d'entraînement, sur lequel sont prévus les moyens de liaison du boîtier d'entraînement, et un élément d'appui (41) côté boîtier de tournevis, sur lequel sont prévus les moyens de liaison du boîtier de tournevis, et l'un des deux éléments d'appui (40, 41) est pourvu d'au moins un évidement (44) et l'autre élément d'appui (40, 41) est pourvu d'au moins une saillie (47) réalisée de manière correspondante à celui-ci et pénétrant dans l'évidement (44), une fente (53) étant formée respectivement entre deux surfaces latérales (52) opposées, orientées dans la direction périphérique de l'arrangement d'appui (13), d'un évidement (44) et d'une saillie (47) associée, et l'arrangement est tel que l'appui du torque de réaction s'effectue dans la direction périphérique de l'arrangement d'appui (13) entre les surfaces latérales (52), une partie du dispositif de mesure de couple (16), en particulier au moins un piézo-élément (16d) et/ou un capteur piézo-électrique et/ou un capteur piézo-résistif du dispositif de mesure de torque (16), étant en particulier logée dans au moins une fente (53), est disposé, de préférence fixé sur au moins l'une des deux surfaces latérales (52), de telle sorte que, lors d'une réduction de la largeur de la fente (53), une pression est exercée sur la partie du dispositif de mesure de torque (16) disposée dans la fente (53) lors d'une rotation réciproque des deux éléments d'appui (40, 41), laquelle pressionpeut être détectée sous forme de signal électrique.
  9. Arrangement de tournevis dynamométrique (1) selon la revendication 8, caractérisé en ce que l'élément d'appui (40) côté boîtier d'entraînement est réalisé sous la forme d'une bride de fixation annulaire (22) et/ou l'élément d'appui (41) côté boîtier de tournevis est réalisé sous la forme d'une plaque annulaire (45), sur la face frontale (46) de laquelle, tournée vers l'élément d'appui (40) côté boîtier d'entraînement, est disposée la au moins une saillie (47) ou le au moins un évidement, et sur la face frontale (48) opposée de laquelle se trouve un prolongement (49) en forme de douille, qui est disposé coaxialement à un perçage central (50) de la plaque annulaire (45),
    le prolongement (49) en forme de douille en particulier étant pourvu d'une section filetée intérieure ou extérieure (51) comme moyen de liaison du boîtier de tournevis, par l'intermédiaire duquel l'élément d'appui (41) côté boîtier de tournevis est en engagement par filetage avec une section filetée intérieure ou extérieure (32) du boîtier de tournevis (4), réalisée de manière correspondante, ou avec un élément intermédiaire prévu entre l'élément d'appui (41) côté boîtier de tournevis et le boîtier de tournevis (4).
  10. Arrangement de tournevis dynamométrique (1) selon l'une des revendications précédentes, caractérisé en ce que l'arrangement d'appui (13) comprend une ouverture centrale traversante (27) définie par la douille (26), à travers laquelle s'étend en particulier une partie de l'arbre de sortie (10) et/ou dans laquelle l'arbre de sortie (10) en particulier pénètre, et la douille (26) et la bague extérieure sont reliées l'une à l'autre exclusivement par les nervures de liaison radiales (28) et sont par ailleurs espacées l'une de l'autre par une fente (29), la fente (29) étant en particulier remplie au moins partiellement d'une masse élastique.
  11. Arrangement de tournevis dynamométrique (1) selon les revendications 9 et 10, caractérisé en ce que le perçage (50) et le prolongement (49) forment une partie de l'ouverture centrale traversantre (27) de l'arrangement d'appui (13).
  12. Arrangement de tournevis dynamométrique (1) selon l'une des revendications précédentes, caractérisé en ce que le dispositif de mesure de torque (16) comprend au moins une jauge de contrainte (16a) qui est disposée et/ou connectée de manière à pouvoir mesurer un torque et qui est connectée de préférence selon le principe du pont de Wheatstone en un ou plusieurs quarts de pont, demi-ponts et/ou ponts complets, plusieurs ponts étant en particulier connectés en série les uns avec les autres, parallèles et/ou mixtes, de préférence l'au moins une jauge de contrainte (16a) étant appliquée sur une surface latérale (30) d'une nervures de liaison (28) orientée dans la direction périphérique de l'arrangement d'appui (13) élastique en rotation, en particulier au moins une jauge de contrainte (16a) étant appliquée sur chacune des surfaces latérales (30) des nervures de liaison (28) orientées dans la direction périphérique de arrangement d'appui (13) élastique en rotation.
  13. Arrangement de tournevis dynamométrique (1) selon l'une des revendications précédentes, caractérisé en ce que les surfaces latérales (30) des nervures de liaison (28) orientées dans la direction périphérique de l'arrangement d'appui (13) élastique en torsion sont réalisées sous forme de surfaces planes et/ou les nervures de liaison (28) présentent chacune une épaisseur au moins sensiblement uniforme dans la direction périphérique de l'arrangement d'appui (13) élastique en torsion et/ou les nervures de liaison (28) sont disposées à une distance régulière les unes des autres dans la direction périphérique de l'arrangement d'appui (13) élastique en torsion.
  14. Arrangement de tournevis dynamométrique (1) selon l'une des revendications précédentes, caractérisé en ce que le dispositif de mesure de torque (16) comprend au moins un capteur, tel qu'un capteur résistif et/ou un capteur électromagnétique et/ou un capteur à effet Hall (16c) et/ou un capteur magnétorésistif et/ou un capteur galvanomagnétique et/ou un capteur optoélectronique et/ou un capteur, qui est réalisé et/ou aménagé pour détecter un angle de rotation et/ou une position et/ou une déformation et/ou ou une torsion et/ou une rotation et/ou une force de cisaillement et/ou un cisaillement de l'arrangement d'appui (13) en particulier élastique en rotation, en particulier d'une zone de l'arrangement d'appui (13), et/ou du boîtier d'entraînement (7) et/ou
    en ce que le dispositif de mesure de torque (16) comprend au moins deux éléments de dispositif de mesure qui sont conçus et/ou disposés de telle sorte qu'ils sont déplacés l'un par rapport à l'autre lors d'une déviation en rotation de l'arrangement d'appui (13) en particulier élastique en rotation, et dont au moins un est un capteur ou une partie d'un capteur, les éléments de dispositif de mesure étant en particulier un élément générateur de champ magnétique (16b) et un élément de mesure de champ magnétique, comme par exemple un capteur à effet Hall (16c) et/ou un élément magnétorésistif, et/ou
    qu'un élément de dispositif de mesure du dispositif de mesure de torque (16) est disposé sur une surface radialement extérieure (36) de la douille (26), en particulier monté sur une estrade (37), et un autre élément de mesure du dispositif de mesure de couple (16) est disposé sur une surface radialement intérieure (38) de la bague extérieure, de préférence de la bride de fixation annulaire (22), en particulier montée sur une estrade (39), ou inversement, les deux éléments de dispositif de mesure du dispositif de mesure de torque (16) étant opposés l'un à l'autre, en particulier sans toutefois se toucher, et le dispositif de mesure de torque (16) étant conçu et/ou agencé pour détecter un déplacement de ses deux éléments de dispositif de mesure dans la direction périphérique de l'arrangement d'appui (13) de support élastique en rotation l'un par rapport à l'autre lors d'une rotation de la douille (26) et de la bague extérieure, en particulier de la bride de fixation (22), l'une par rapport à l'autre, et de préférence,
    l'arrangement des deux éléments de dispositif de mesure opposés du dispositif de mesure de torque (16) est prévu à la place d'une nervure de liaison (28) et l'arrangement est positionné dans la direction périphérique de l'arrangement de d'appui (13)élastique en rotation, en particulier entre deux perçages traversants (23) voisins de la bride de fixation (22).
  15. Arrangement de tournevis dynamométrique (1) selon l'une des revendications précédentes, caractérisé en ce qu'il est prévu une électronique de commande (3) qui est couplée au dispositif de mesure de torque (16) et au moteur (8) afin d'arrêter le moteur (8) en fonction de signaux de sortie du dispositif de mesure de torque (16),
    l'électronique de commande (3) étant en particulier une électronique de commande interne (3b) disposée sur le boîtier de tournevis (4), en particulier disposée au moins partiellement à l'intérieur du boîtier de tournevis (4), une électronique de commande externe (3a) disposée à distance du boîtier de tournevis (4) et/ou un contrôleur de niveau supérieur.
  16. Arrangement de tournevis dynamométrique (1) selon l'une des revendications précédentes, caractérisé en ce que le boîtier d'entraînement (7) est séparé du boîtier de tournevis (4) dans la direction radiale par une fente (6), et/ou
    en ce que la chaîne d'entraînement (5) comporte un engrenage (9) qui se raccorde à l'extrémité axialement avant du moteur (8) et qui est disposé dans le boîtier d'entraînement (7).
EP20710077.7A 2019-03-08 2020-02-28 Ensemble de visseuse dynamométrique et procédé de fonctionnement d'un tel ensemble de visseuse dynamométrique Active EP3820649B1 (fr)

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DE202019101333.8U DE202019101333U1 (de) 2019-03-08 2019-03-08 Drehmomentschrauberanordnung zum Betrieb einer solchen Drehmomentschrauberanordnung
PCT/EP2020/055348 WO2020182501A1 (fr) 2019-03-08 2020-02-28 Ensemble de visseuse dynamométrique et procédé de fonctionnement d'un tel ensemble de visseuse dynamométrique

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EP4029651A1 (fr) * 2021-01-18 2022-07-20 Johannes Lübbering GmbH Dispositif à vis pourvu d'engrenage angulaire et de moyens de détection de couple intégrés
CN112743323B (zh) * 2021-01-27 2023-10-27 马杰斌 一种十字螺丝刀生产用零件拼装装置

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DE3142682C2 (de) * 1981-10-28 1986-06-19 Black & Decker, Inc. (Eine Gesellschaft N.D.Ges.D. Staates Delaware), Newark, Del. Elektrowerkzeug, insbesondere Handwerkzeug
JPS5893474U (ja) * 1981-12-19 1983-06-24 日本電気精器株式会社 電動ドライバ
DE20209850U1 (de) * 2002-06-25 2002-09-19 Wille Gmbh & Co Drehmomentsensor mit Stegen
JP5201842B2 (ja) 2007-01-29 2013-06-05 勝行 戸津 電動ドライバーのねじ締めトルク検出装置
US10675913B2 (en) * 2016-06-24 2020-06-09 Specialized Bicycle Components, Inc. Bicycle wheel hub with power meter
DE102016010552B3 (de) * 2016-08-31 2017-11-09 Sensodrive Gmbh Drehmomentsensor mit Dichtungsmembran
DE102018124402A1 (de) * 2018-10-02 2020-04-02 DSM Meßtechnik GmbH Elektronisches Schraubwerkzeug
DE202019100283U1 (de) * 2019-01-18 2019-01-28 Kilews Industrial Co., Ltd. Drehmomentsteuervorrichtung für einen elektrischen Schraubendreher

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