• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    . A portable nutrunner is controlled by a working control unit and comprises a housing (10; 50) with a rotary motor, a gear housing (15; 55) including a gear device (18; 56.57) and a drive spindle (19; 60) and is connected to the housing ( 10; 50) via a swivel or multi-position connection, together with the working parameter sensing sensor device (22,23,68) associated with the drive spindle (19; 60). The drive spindle (19; 60) has an internal coaxial cavity 24; 71) which houses a number of signal processing electronic components (72) connected to the sensor device (22,23; 68) and communicating with the work controller via signal transmitting devices (28,3l; 82,84) the intermediate drive spindle ( 19; 60) and the gear housing (15; 55) and the intermediate gear housing (15; 55) and the housing (10; 50), at least one of the signal transmitting devices (28; 82) being of a non-contact type.
    公开号:SE0900795A1
    申请号:SE0900795
    申请日:2009-06-11
    公开日:2010-12-12
    发明作者:Lars Karl Johan Elsmark
    申请人:Atlas Copco Tools Ab；
    IPC主号:
    专利说明:

    P20-09706-100224When such a nutrunner is provided with one or moreworking parameter sensors located in the gearbox, they mustthe signals generated thereby are transmitted from the gearbox toan electronic operation control unit which is either providedin the nutrunner housing or in a stationary unit separately fromthe nutrunner. In both cases there is a requirement thatachieve a simple yet reliable signal transmission fromthe sensor or sensors in the gearbox to a wiring inthe housing for further transmission to the control unit, located inthe house or at a distance.
    It is an object of the invention to create a portablenutrunner that includes a housing, a gear housing that isrotatably and / or releasably connected to the housing via a.swivel or multi-position clutch, in which case the gearbox housing. '"comprises at least one power-transmitting rotating part, at leasta working parameter sensing sensor device, andmotion-transmitting signal transmitting devices arrangedto transmit operation parameter related signalsgenerated by the sensor device or devices forthe gearbox housing and the nutrunner housing.
    It is another object of the invention to create oneportable nutrunner that includes a housing, a gear housingwhich is rotatably and / or releasably connected to the housing viaa swivel connection, the gear housing comprising at least onepower-transmitting rotating part, at least oneworking parameter sensing sensor device assigned to itpower-transmitting rotating part, as well as a non-contactmotion-transmitting signal transmitting device arrangedbetween the rotating part and the gear housing.
    P20-09706-100224Yet another object of the invention is to create a portablenutrunner comprising a housing, a gear housing which isrotatably and / or releasably connected to the housing andcomprising a power transmission part, at least oneworking parameter sensing sensor device assigned to itthe power transmission part, as well as signal processing electroniccomponents connected to the sensor device, itthe power transmission part has a coaxial cavity inwhich the electronic components are located.
    Additional objects and advantages of the invention will become apparentof the following description and claims.
    Preferred embodiments of the invention are described belowwith reference to the accompanying drawings.
    List of drawingsFig. 1 shows a side view of a nutrunner according tothe invention.
    Fig. 2 shows a longitudinal section through the gear housing ofthe nutrunner in Fig. 1.
    Fig. 3 shows a longitudinal section through the gear housing of anutrunner according to an alternative embodiment ofthe invention.
    The nutrunner illustrated in Figs. 1 and 2 includesa housing 10 with a rear handle 11 and an engine section 12which extends substantially parallel to the handle 11and encloses the engine. A gear housing 15 is rotatable andreleasably connected to the housing 10 and supported at its frontend a torque bracket 16. The torque bracket 16 is mountedon and rotationally locked relative to the gear housing 15 via aP20-09706-100224splined portion 17. The interface between the housing 10 andthe gear housing 15 is illustrated by the line A-A.
    The gear housing 15 is axially locked relative to the housing 10conventionally by means of balls 26 in cooperation with grooves inthe two parts, and an actuating sleeve 27 is movably guided onhousing 10 and arranged to retain the balls 26 in theirslocking positions and to release the gear housing 15 by soundingthe balls 26 leave at least one of the grooves.
    The gear housing 15 comprises a two-stage reduction gear 18 ofplanet type and a power transmission drive spindle 19. Denlater forms an output shaft with a square end forconnection to a nut sleeve. The first step inthe reduction gear 18 has a sun gear 20 which is coupledto the motor via a clutch shaft 21 and one not shownbevel gear. However, the reduction gear is itself offconventional type, and since it does not form part ofthe invention, it is not described in further detail.
    The drive spindle 19 is provided with a torque sensordevice 22 which comprises an elastically deformablefolded portion 23 of the drive spindle 19 and awire stretching device (not shown in further detail)affixed thereto. The drive spindle 19 is provided with a coaxialcavity 24, the soft portion 23 being formed therefromperipheral wall of the cavity 24. Inside the cavity 24is arranged a number of electronic components which forma signal processing unit 25 connected tothe wire tensioning device.
    The signals generated by the torque sensorthe device 22 is transferred to an operation control unit forP20-09706-100224control of the nutrunner's work in relation to thereporting signals received from the torque sensorthe device 22. The control unit is not shown in detail but canbe located either in the house 10 or at a distance fromthe nutrunner. Regardless of location, the signals thatgenerated by the torque sensing device 22 is transmittedto the house 10. The very first step to implement thisis to transmit the signals from the drive spindle 19 tothe gearbox housing 15. This is done via a first non-contactsignal transmitting device 28 which is connected toelectrical conductors 29 in the gearbox 15. Thissignal transmitting device 28 is illustrated onlyschematically and may be of any non-contact type.,for example, an induction device having magnets and»Coils, a device comprising a magnetostrictivematerial in the output shaft, a telemetric devicesignal transmission, etc.
    For transmitting the torque signals from the gear housing 15 tothe housing 10 and the control unit are arranged a secondsignal transmitting device 31 and an electrical wiring30 in the housing 10 for connecting the device 31 tothe control unit, either directly in the year located in the housing 10or via an external cable if it is placed at a distancefrom the nutrunner. The second signal transmissionthe device 31 may be of a non-contact type orbrush type. Since rotation between the gear housing 15 andthe housing 10 is relatively limited, it will not occursome mechanical wear why a signal transmittingbrush type device is sufficiently safe andreliable.
    P20-09706-100224In the case of powerful nutrunners where a torque is restrainedis used to transfer the reaction forces to asuitable stationary object and to protect the operatorfrom being exposed to these great forces, it is importantthat the gearbox with mounted torque bracket is rotatableor swiveled relative to the nutrunner housing and handle. Themeans that when a working parameter sensing device,for example a torque sensor, is arranged on or nearnext to the output shaft of the nutrunner must include onerotationally compliant signal transmitting device, not onlybetween the drive spindle / output shaft and the gearbox withoutalso between the gear housing and the nutrunner housing. In order toavoid mechanical wear and poor connection it mustthe signal transmitting device between the drive spindle / soutput shaft and gearbox be non-contact. Thethe signal transmitting device between the gearbox andthe nutrunner housing is not subjected to the same intensityrotational movement, which means that the signal transmittingthe device between these two parts may be of a simple onebrush type as described above.
    The arrangement with a first and a second signal transmissiondevice makes it possible to place oneworking parameter sensing device on or near adjacentthe output shaft and to arrange the gearbox rotatably andreleasably connected to the nutrunner housing. It also meansto the gearbox housing with a working parameter sensing deviceand a mounted torque bracket can be made in a simple mannerremovable as a unit and interchangeable with another gearboxwith a different gear ratio and / or with anothertorque bracket mounted.
    P20-09706-100224Fig. 3 shows the front portion of an angle nutrunnerwhich comprises a housing 50 in which arotary motor and a reduction gear 58 of the planetary gear type.
    The front part of the nutrunner consists of a gear housing 55 with aangular gear having a pinion gear 56 and a crown wheel57. The crown wheel 57 is formed in one piece with an outputshaft 59 which is provided with a square pin and which is mountedin stock 61.62. The pinion gear 56 is formed in one piecewith a drive spindle 60 which is stored in bearing 63,64. Atits rear end, the drive spindle 60 is formed with asplined portion 65 for releasable drive connection with aplanet gear holder 66 in the reduction gear 58.
    A torque sensor that includes strain gauges 68 which aremounted on the drive spindle 60 and arranged to be activated viaelastic torsional deformation of the drive spindle 60 belowtorque transmission. The drive spindle 60 includes a coaxialcavity 71 in which a printed circuit board 73 is placed.
    The circuit board 73 carries electronic components 72 which areconnected to the strain gauges 68 and arranged to be treatedthe signals emitted by the latter.
    The gear housing 55 is formed with a neck portion 75 intended toincluded in a socket portion 76 in the housing 50. The gear housing 55 isaxially locked relative to the housing 50 via balls 77 androtationally locked thereto via a spline connection 78.
    The balls 77 are held in their locking positions by an actuating sleeve 79which is movably mounted on the housing 50. The interface betweenthe gear housing 55 and the housing 50 are illustrated by a line B-B.
    The electrical signals generated by the strain gauges 68transmitted from the drive spindle 60 to the gear housing 55 via afirst transfer device 82 which should be of someoneP20-09706-100224non-contact type based on, for example, inductive ortelemetric principles. In the gear housing 55 are not arrangedillustrated conductors for transmitting signals from itfirst transfer device 82 to a secondtransmission device 84 arranged between the gear housing 55 andhousing 50. This second transfer device 84 need notconsists of a non-contact type as it does not occurany rotational movement between the gear housing 55 and the housing 50.
    However, it is important that the second transfer device 84is capable of transmitting signals regardless of the angular positionbetween the gear housing 55 and the housing 50.
    In the housing 50 a wiring (not shown) is arrangedconnecting the second transfer device 84 towork control unit not illustrated in itself butwhich is located either in the house 50 or at a distance fromthe nutrunner.
    By arranging a relatively one nutrunner housingseparate and detachable and / or replaceable gearbox withat least one working parameter sensing deviceassigned to the drive spindle and signal transmitting devicesbetween on the one hand the drive spindle and the gearbox and on the otherthe side between the gear housing and the nutrunner housing such ascharacterizing the invention, the advantage of having one is achievedseparately detachable and / or replaceable gearbox that iscomplete with working parameter sensing devices such asautomatically and simultaneously connected to a work control unitwhen the gear housing is connected to the nutrunner housing. Thisavoids sources of error and bad contacts and makes it possibleto place the working parameter sensing devicesafter the reduction gear and thereby to a large extentavoid signal interference.
    权利要求:
    Claims (9)
    [1]
    A portable nutrunner controlled via a work control unit, including a housing (10; 50) with a rotary motor, a gear housing (15; 55) with a power-transmitting drive spindle (19; 60), a rotatable and / or releasable connection (26,27; 77-79) between the gear housing (15; 55) and the housing (10; 50), and a sensor device (22, 23; 68) associated with the drive spindle (19; 60) and arranged to generate signals in relation to the instantaneous value of a working parameter characterized in that a first signal transmitting device (28; 82) is located between the drive spindle (19; 60) and the gear housing (15; 55), and a second signal transmitting device (31; 84) is located between the gear housing ( and the housing (10; 50) and connected to a wiring in the housing (10; 50) for communication with the work control unit, said first signal transmitting device (28; 82) comprising a non-contact device and being connected to said second signal transmitting device (3l; 84) via electrical conductors (29) in the gear housing (l5; 55).
    [2]
    A portable nutrunner according to claim 1, characterized in that said first signal transmitting device comprises means for transmitting via induction of signals as well as electrical power between the drive spindle and the gear housing.
    [3]
    Portable nutrunner according to claim 1, characterized in that said first signal transmitting device (28; 82) comprises means for telemetric transmission of signals as well as electrical power between the drive spindle (19; 60) and the gear housing (15). ; 55).
    [4]
    Portable nutrunner according to any one of claims 1-3, characterized in that the sensor device (22,23) comprises a torque sensor which consists of an elastically deformable folding section (23) of the drive spindle (19), and a strain sensor arrangement arranged on said wick section (23) and communicating with said first signal transmitting device (28).
    [5]
    Portable nutrunner according to claim 4, characterized in that the drive spindle (19) is formed with a coaxial cavity (24), and that said soft section (23) is constituted by the peripheral wall of said cavity (24).
    [6]
    Portable nutrunner according to any one of claims 1-3, characterized in that the drive spindle (19; 60) is formed with a coaxial cavity (24; 71), and that the signal processing electronic components are placed in said cavity and communicate with the sensor device (22.23; 68).
    [7]
    Portable nutrunner according to one of Claims 1 to 6, characterized in that the drive spindle (19) forms an output shaft with an outer end extending out of the gear housing (15) and adapted to support a nut sleeve.
    [8]
    Portable nutrunner according to one of Claims 1 to 6, characterized in that the gear housing (55) comprises an angular gear (55,57), and in that the drive spindle (60) carries the pinion gear of the angular gear (56,57). (56).
    [9]
    Portable nutrunner according to one of Claims 1 to 8, characterized in that the control unit is located in the housing (10; 50).
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    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE0900795A|SE533830C2|2009-06-11|2009-06-11|Nut wrench with gearbox and parameter transducer|SE0900795A| SE533830C2|2009-06-11|2009-06-11|Nut wrench with gearbox and parameter transducer|
    PCT/SE2010/050656| WO2010144048A1|2009-06-11|2010-06-11|Portable power wrench with a gear casing and a parameter sensing device|
    JP2012514924A| JP5695640B2|2009-06-11|2010-06-11|Portable power wrench with gear casing and parameter sensing device|
    EP10786464.7A| EP2440372B1|2009-06-11|2010-06-11|Portable power wrench with a gear casing and a parameter sensing device|
    US13/377,426| US8991518B2|2009-06-11|2010-06-11|Portable power wrench with a gear casing and a parameter sensing device|
    CN201080025642.7A| CN102458773B|2009-06-11|2010-06-11|Portable power wrench with a gear casing and a parameter sensing device|
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