EP1824643B1 - Hand tool machine with a torque limiter - Google Patents

Hand tool machine with a torque limiter Download PDF

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Publication number
EP1824643B1
EP1824643B1 EP20050796977 EP05796977A EP1824643B1 EP 1824643 B1 EP1824643 B1 EP 1824643B1 EP 20050796977 EP20050796977 EP 20050796977 EP 05796977 A EP05796977 A EP 05796977A EP 1824643 B1 EP1824643 B1 EP 1824643B1
Authority
EP
European Patent Office
Prior art keywords
torque
clutch
limiting unit
overload
spring
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
EP20050796977
Other languages
German (de)
French (fr)
Other versions
EP1824643A1 (en
Inventor
Bruno Aeberhard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE200410058809 priority Critical patent/DE102004058809A1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to PCT/EP2005/055369 priority patent/WO2006061286A1/en
Publication of EP1824643A1 publication Critical patent/EP1824643A1/en
Application granted granted Critical
Publication of EP1824643B1 publication Critical patent/EP1824643B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25B21/00Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • 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
    • 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
    • B25B23/141Mechanical overload release couplings

Abstract

The invention relates to a hand tool machine with a torque limiter (2) enabling a user to set a maximum torque which is transmitted by a motor drive (4) to a tool carrier (6). According to the invention, the hand tool machine comprises an overload clutch which interrupts a power flux between the motor drive (4) and the tool carrier (6) when the transmitted torque exceeds the overload torque.

Description

    State of the art
  • The invention relates to a hand tool with a torque limiting unit according to the preamble of claim 1. Such a device is made US 6142243 A1 known.
  • Hand tool machines, such as cordless screwdrivers, cordless drills, or cordless impact drills, have high drive torque, the limitation of which is desirable for some applications. By an adjustable torque limiter, for example, a number of screws with the same screwing be screwed into a workpiece, wherein a torque limiting unit disengages as soon as the screws oppose a motor output a certain torque resistance. To adjust the maximum torque to the task to be performed, the torque limiting unit is adjustable by an operator.
  • From the DE 103 09 057 A1 is a hand tool machine with a torque limiter as described above. An operator sets the maximum torque to be transmitted to the tool driver with a torque limiting unit disengaged when the torque produced by the engine exceeds the set maximum torque. For shutting off or bridging the torque limiting unit, a drilling position is provided in which the torque limiting unit can no longer separate and thus an uninterrupted power flow between the engine output and the tool driving is guaranteed even with a strong resistance of the tool.
  • Advantages of the invention
  • The invention is based on a handheld power tool with a torque limiting unit, with which a maximum torque, which is transmitted from a motor output to a tool driver, is adjustable by an operator.
  • It is proposed according to claim 1, that the hand tool machine has an overload clutch, which interrupts a power flow between the engine output and the tool driver, when the transmitted torque exceeds an overload torque. It can undesirable, very high torques, for example, torques above 45 Nm, which can lead to a risk of injury to an operator and to damage in the power tool can be intercepted.
  • Usually, an adjustable maximum torque between 1 Nm and 15 Nm, for example, to be able to make a speedy screwing in wood without damage to screws or wood. During drilling, larger torques must sometimes be transmitted, so that a drilling position is provided, in which the hand tool can be used to its power limit and an interruption of the torque by the torque limiting unit is inadmissible. Although larger working torques up to about 45 Nm can be absorbed by an operator in the event of a sudden blockage, for example by tilting a drill in one Drill hole, however, can briefly torques above 75 Nm occur, which are passed directly to the operator. Such torques were previously not common on hand tool machines with a torque limiting unit. To be able to absorb these high torques, the overload clutch interrupts the power flow between the engine output and the tool drive above an overload torque. An overload torque is understood to mean a torque which poses a risk potential for the operator. The overload torque is suitably above 45 Nm, in particular above 55 Nm. The overload torque is advantageously preset and unchangeable for an operator and also suitably preset independently of a maximum torque of the torque limiting unit.
  • A reliably adjustable and quickly disengaging torque limiting unit can be achieved if the torque limiting unit interrupts a power flow between the engine output and the tool driving when the torque is exceeded by the maximum torque.
  • Advantageously, the torque limiting unit interrupts the power flow between the engine output and the tool take on a first clutch, and the overload clutch interrupts the power flow to a second clutch. Due to the independent separation of the power flow through the torque limiting unit and the overload clutch, the power tool can be made particularly secure and the maximum torque can be easily adjusted.
  • In an advantageous development of the invention, the torque limiting unit has a bridging position, in which the torque which can be transmitted by it is greater than the overload torque. The torque limiting unit can be adjusted or bypassed independently of the overload clutch, whereby a simple operability of the torque limiting unit can be achieved with a high level of safety for an operator through the overload clutch.
  • It is also proposed that the overload clutch comprises an element which is an element of a planetary gear. Hand tool machines with a planetary gear are usually made very compact. By using an element of the planetary gear as an element of the overload clutch, the compactness of the power tool can be further increased.
  • Also conducive to compactness of the power tool is the use of an element that is an element of the torque limiting unit and also an element of the overload clutch. It can also be saved additional elements, whereby the hand tool is kept cheap. The element is expediently such an element, at which the power flow is interrupted by the engine output on the tool driving by the torque limiting unit or the overload clutch, in particular by both the torque limiting unit and the overload clutch is interrupted.
  • A simple and thus inexpensive installation of the power tool can be achieved if the Torque limiting unit and the overload clutch acting in the same direction spring elements. In addition, a compact hand tool can be achieved. Also, the compactness of the power tool is conducive when the direction is the axial direction.
  • The arrangement of the spring elements in a spring assembly, the power tool can also be kept very compact.
  • A particularly dynamic adjustment of the maximum torque in a large torque range can be achieved if at least the spring elements of the torque limiting unit have different lengths of coil springs. Due to the different lengths, a progressively increasing maximum torque can be achieved in a particularly simple manner with uniform impressions of the spring assembly.
  • Conveniently, the overload clutch in the spring assembly comprises shorter coil springs than the torque limiting unit. These shorter coil springs can be made very tight and thereby provide in the area in which the package is very compressed, a very high spring force of the package, which is relevant for the overload torque. The overload clutch and the torque limiting unit can be made very compact together in this way.
  • In a further embodiment of the invention, the torque limiting unit comprises an adjusting element with a control cam which has a first segment for setting the maximum torque and a control in the first having different second segment for setting a drilling operation without adjustable torque limiter. For example, the second segment of the control cam may be made steeper than the first segment, so that with a short operation of the adjustment member, a large change in torque from a maximum torque to a lock-up position and the overload torque, respectively. It is also possible to design the second segment very flat or without a torque change, whereby an undesired pushing out of the adjusting element from the setting of the drilling operation can be prevented.
  • Slight mechanical stress on the elements of the overload clutch can be achieved when the overload clutch has a multi-element package with a preloaded spring element, with the bias held within the package. The package is expediently limited by at least two elements which are holding the bias voltage with each other, in particular attached to each other. A high preload can be achieved with a plate spring to save space.
  • drawing
  • Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.
  • Show it:
  • Fig. 1
    a front part of a cordless screwdriver with a torque limiting unit and an overload clutch in an exploded view,
    Fig. 2
    the front part off FIG. 1 in a sectional view,
    Fig. 3
    a perspective view of a guide sleeve FIG. 1 and
    Fig. 4
    an alternative arrangement of elements of a torque limiting unit and an overload clutch.
    Description of the embodiments
  • The FIGS. 1 and 2 show a front part of a power tool designed as a cordless power tool in an exploded view ( FIG. 1 ) and a sectional view ( FIG. 2 ). To drive the tool driver 6, a torque is transmitted from the engine output 4 to a three-stage planetary gear with, inter alia, planet wheels 8, which consequently rotate about their own axis. The planet gears 8 are mounted on a planet carrier 10, which does not rotate in the normal working mode, that is fixedly connected to a housing 12 of the power tool. The planetary gears 8 drive a ring gear 14, the internal toothing of which engages around a driver 16 and drives it. The driver 16 drives a star 18 and this via an inner square the tool driver. 6
  • In normal operation, the planet carrier 10 rests stationary to the housing 12. It is rotatably connected via two locking washers 20, 22, six spring elements 24 and two plungers 26, 28 with a guide sleeve 30, which in turn is rotatably mounted on the housing 12 of the power tool. The non-rotatable connection is achieved via cam 32 of the planet carrier 10, which engage in cams of the first locking disc 20, wherein the first locking disc 20 in turn connected to cam 34, which are in engagement with cam 36 of the second locking disc 22, with the second locking disc 22 , The second locking disc 22 in turn is held by arms 38 of the pressure piece 26, which engage between elevations 40 of the second locking disc 22. The two pressure pieces 26, 28 are formed by formations 42 in internal grooves 44 (FIG. FIG. 3 ) of the guide sleeve 30 is held.
  • Transmission side behind the planet carrier 10, a plate spring 46 is arranged, which is inserted in a holder 48. The holder 48 includes with arms 50, the plate spring 46 and the planet carrier 10 and engages in pockets 52 of the first locking disk 20 a. In these pockets 52, the arms 50 are held by thickenings 54, wherein the holder 48 is held at a voltage with which the plate spring 46 is compressed a little way, on the locking disc 20 and the planet carrier 10 between disc spring 46 and locking disc 20 clamps. The holder 48, the plate spring 46, the planetary carrier 10 and the locking disc 20 form a biased package 56. The force exerted by the plate spring 46 on the planetary carrier 10 and the retaining wheel 58 pressure force is by the arms 50 and the pockets 52 within held the package 56 and thus does not supported by the retaining wheel 58 and a wire ring 64 in the guide sleeve 30 become. Behind the holder 48, the retaining wheel 58 is arranged, which engages with protrusions 60 in the inner grooves 62 of the guide sleeve 30 and rotatably connected thereto and is secured to the wire ring 64 axially in the guide sleeve 30.
  • To set a maximum torque that is transmitted to the tool driver 6, the spring pressure of the spring elements 24 can be varied to the second locking disc 22 by means of an adjusting means 66. For this purpose, the adjusting means 66 on an actuating means 68, a cam ring 70, a perforated disc 72, a pin 74 and a spring 76. A recess 78 and a groove 80 hold the cam ring 70 and the perforated disc 72 rotationally fixed in the actuating means 68. Upon rotation of the actuating means 68 of the cam ring 70 is rotated, wherein on a control cam 82 of the cam ring 70 slipping arms 84 for movement of the second pressure piece 28 in the axial direction 86 provide. The arms 84 engage through recesses 88 of the guide sleeve 30 and, loaded by the spring force of the spring elements 24, pressed against the control cam 82. During a movement of the second pressure piece 28 in the axial direction 86, the spring pressure of the spring element 24, with which the second locking disk 22 is pressed onto the first locking disk 20, varies. By arranging four shorter spring elements 24 between two longer spring elements 24, a progressive adjustment of the maximum torque with uniform adjustment of the cam ring 70 can be achieved, as below FIG. 4 is described. The perforated disc 72 prevented with their holes into which the bolt 74 engages detent, an unintentional adjustment of the actuating means 68 during operation of the power tool.
  • During normal operation of the power tool, in which a torque is transmitted to the tool driver 6 below the set maximum torque, the planet carrier 10 rests relative to the housing 12. When the torque reaches the tool driver 6 the set maximum torque, the second locking disk 22 is through oblique flanks of the cams 34, 36 deflected against the spring elements 24, and the first locking disc 20 - and with it the entire package 56 - can rotate against the second locking disc 22. The rotationally fixed connection between planet carrier 10 and guide sleeve 30 is interrupted at a first coupling between the two locking disks 20, 22.
  • To bridge the torque limiting unit 2, the cam ring 70 comprises, in addition to a uniformly rising first segment 90 within the control cam 82, a second, steeper rising segment 92 and a third, flat segment 94 for implementing a drilling operation, which does not change the spring pressure when the cam ring 70 is rotated the spring elements 24 causes. When setting the bridging position, the arms 84 rest on the third segment 94 and are deflected maximally far in the direction of the engine output 4 of the handheld power tool. The spring elements 24 are compressed so far that the spring elements 24 holding pins 96, 98 touch each other, so that the locking disc 22 is held in the axial direction 86 inextricably between the locking disk 20 and the pressure member 28. A latching of the first locking disk 20 via the second locking disk 22 - and thus a separation of the power flow through the first clutch - is no longer possible. In addition, the arms 38 between the pockets 52 of the locking disc 20, whereby the locking disk 20 is rotatably connected to the guide sleeve 30.
  • By means of the torque limiting unit 2, a torque which is detrimental to the portable power tool and dangerous for an operator could be transmitted to the tool driver 6. In order to prevent the transmission of such a torque, an overload clutch is arranged within the package 56, which interrupts the power flow to the tool driver 6 when an overload torque is exceeded. If a torque transmitted to the tool driver 6, which reaches the overload torque, the planet carrier 10 is deflected by oblique edges of the cam 32 and the cam of the locking disc 20 in the direction of the plate spring 46 and the plate spring 46 is further compressed against its bias. The planet carrier 10 can now turn against the locking disk 20, whereby the power flow from the engine output 4 to the tool driver 6 is interrupted at a second coupling between the planet carrier 10 and the locking disk 20. While the locking disk 20 and the holder 48 rest in a rotationally fixed manner to the guide sleeve 30, the planet carrier 10 rotates and possibly with it the plate spring 46.
  • The locking disk 20 is thus part of the package 56 thus part of the overload clutch, which consists of just that package 56, and part of the torque limiting unit 2, which additionally includes the plungers 26, 28, the spring elements 24 and the locking disk 22.
  • In FIG. 4 is an alternative arrangement of elements of a torque limiting unit 2 and an overload clutch shown. Substantially identical components are basically numbered with the same reference numerals. Furthermore, with regard to features and functions that remain the same, the description of the exemplary embodiment in FIGS FIGS. 1 to 3 to get expelled.
  • As the spring elements 24 of the embodiment in FIG. 1 Spiral springs 100, 102, 104 are executed in different lengths. At a setting of the lowest possible maximum torque through the cam ring 70, the longest coil springs 100 are held with a small bias between the locking disc 22 and the pressure member 26. The maximum torque is set to 1 Nm. Upon rotation of the cam ring 70, first, the coil springs 100 are compressed, whereas the next shorter coil springs 102 are still arranged with a small clearance between the locking disc 22 and the pressure member 26. From a maximum torque of 4 Nm, the spiral springs 102 are compressed in a further rotation of the cam ring 70, so that the maximum torque with a smooth rotation of the cam ring 70 now increases faster, up to a value of 20 Nm. The shortest coil springs 104 are arranged in this position even with a game between the locking disc 20 and the pressure piece 26 and contribute to the force of the existing of the coil springs 100, 102 and 104 spring package yet nothing.
  • Only with an adjustment of the cam ring 70 in the Bohrstellung in which the arms 84 rest on the third segment 94, the very short and very tight coil springs 104 are also compressed, but between the pins 96, 98 still a small game remains.
  • The maximum torque is now set by the very tight coil springs 104 to 55 Nm. The resulting compressive force by the spring assembly of the coil springs 100, 102, 104 of about 400 N is received within the guide sleeve 30 by the retaining wheel 58 and the wire ring 64.
  • If the torque transmitted to the tool driver 6 reaches the overload torque, then the locking disk 22 is deflected by the inclined flanks of the cams 32, 36 in the direction of the pressure piece 26, and the cams 32, 36 are disengaged. The power flow from the engine output 4 to the tool driver 6 is thus interrupted at the same point at which it is interrupted by the torque limiting unit 2 even at a set outside the drilling position maximum torque.

Claims (8)

  1. Portable power tool having a torque limiting unit (2), by way of which a maximum torque which is transmitted from a motor output (4) to a tool drive (6) is settable by an operator, and having an overload clutch which interrupts a flux of force between the motor output (4) and the tool drive (6) when the torque transmitted exceeds an overload torque, wherein the torque limiting unit (2) has a first clutch having two clutch elements (20, 22) and the overload clutch has a second clutch having two clutch elements (10, 20), characterized in that one clutch element (20) of the overload clutch is a part of the torque limiting unit (2) and the other clutch element (10) of the overload clutch is an element of a planetary gear mechanism.
  2. Portable power tool according to Claim 1, characterized in that the torque limiting unit (2) has a bridging position, in which the torque that is transmittable thereby is greater than the overload torque.
  3. Portable power tool according to either of the preceding claims, characterized in that the torque limiting unit (2) comprises spring elements (24) that act in the same direction.
  4. Portable power tool according to Claim 3, characterized in that the spring elements (24) are arranged in a spring assembly.
  5. Portable power tool according to one of the preceding claims, characterized in that the torque limiting unit (2) comprises a setting element having a control cam (82) which has a first segment (90) for setting the maximum torque and a second segment (92, 94), which has a different control action from the first segment, for setting a drilling operation without settable torque limiting.
  6. Portable power tool according to one of the preceding claims, characterized in that the overload clutch has an assembly (56) having a plurality of elements and a preloaded spring element (46), wherein the preload is held within the assembly (56).
  7. Portable power tool according to one of the preceding claims, characterized in that one clutch element (10) of the overload clutch is a planet carrier of the planetary gear mechanism.
  8. Portable power tool according to Claim 6, characterized in that the assembly (56) comprises at least the element (10) of the planetary gear mechanism, the clutch element (20) of the overload clutch and a holder (48) for the spring element (46).
EP20050796977 2004-12-07 2005-10-19 Hand tool machine with a torque limiter Active EP1824643B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE200410058809 DE102004058809A1 (en) 2004-12-07 2004-12-07 Hand tool with a torque limiting unit
PCT/EP2005/055369 WO2006061286A1 (en) 2004-12-07 2005-10-19 Hand tool machine with a torque limiter

Publications (2)

Publication Number Publication Date
EP1824643A1 EP1824643A1 (en) 2007-08-29
EP1824643B1 true EP1824643B1 (en) 2012-07-25

Family

ID=35500897

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050796977 Active EP1824643B1 (en) 2004-12-07 2005-10-19 Hand tool machine with a torque limiter

Country Status (5)

Country Link
US (1) US8104546B2 (en)
EP (1) EP1824643B1 (en)
CN (2) CN100586660C (en)
DE (1) DE102004058809A1 (en)
WO (1) WO2006061286A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9550289B2 (en) 2012-12-20 2017-01-24 Black & Decker Inc. Hand-held power tool with torque limiting unit

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT476272T (en) * 2005-08-29 2010-08-15 Demain Technology Pty Ltd Powered tool
DE102007050307A1 (en) 2007-10-22 2009-04-23 Robert Bosch Gmbh Hand tool
DE102008033270A1 (en) * 2008-07-15 2010-01-21 Schaeffler Kg Electromechanical actuator, in particular for a roll stabilizer of a motor vehicle
AU2009279632B2 (en) * 2008-08-06 2013-09-26 Milwaukee Electric Tool Corporation Precision torque tool
DE102008041599A1 (en) 2008-08-27 2010-03-04 Robert Bosch Gmbh Switchable transmission in a hand tool
DE102008042033A1 (en) * 2008-09-12 2010-03-18 Robert Bosch Gmbh Hand tool with a switchable mechanism
DE102008042354A1 (en) * 2008-09-25 2010-04-01 Robert Bosch Gmbh Hand tool with a switchable gearbox
DE102008042423A1 (en) 2008-09-29 2010-04-01 Robert Bosch Gmbh Hand tool with a spindle for holding a tool
DE102008053481A1 (en) * 2008-10-28 2010-04-29 Bayerische Motoren Werke Aktiengesellschaft Split motor vehicle stabilizer for roll stabilization at front axle and rear axle of motor vehicle, has actuator with housing and output side connected with stabilizer parts, and torque limiting device adjusting maximum transmitted torques
DE102008043795A1 (en) 2008-11-17 2010-05-20 Robert Bosch Gmbh Switchable planetary gear in a hand tool
DE102009046663A1 (en) * 2009-01-16 2010-07-22 Robert Bosch Gmbh Machine tool, in particular hand-held machine tool
DE202009017422U1 (en) * 2009-06-26 2010-11-04 Robert Bosch Gmbh Hand-held power tool
DE102009027951A1 (en) * 2009-07-23 2011-01-27 Robert Bosch Gmbh Hand tool machine, in particular battery-operated electric hand tool machine
DE102010030307A1 (en) 2009-10-02 2011-04-07 Robert Bosch Gmbh Hand tool with a switchable mechanism
DE102009054930B4 (en) * 2009-12-18 2017-07-27 Robert Bosch Gmbh Drilling machine
EP2635410B1 (en) 2010-11-04 2016-10-12 Milwaukee Electric Tool Corporation Impact tool with adjustable clutch
DE202011110376U1 (en) 2011-01-03 2014-01-17 Robert Bosch Gmbh Planetary gear for a machine tool
DE102012018240A1 (en) 2012-09-17 2014-03-20 Lothar Strach Two-gear screw driller, particularly battery-screw driller, has two circular gear teeth arranged one after another for single- and sum circuit without friction, where gear speed is generated by sliding block
US9494200B2 (en) 2013-03-14 2016-11-15 Black & Decker Inc. Clutch for power tool
US9657155B2 (en) 2013-04-12 2017-05-23 Printpack Illinois, Inc. Containers and materials with improved punctureability

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446363A (en) * 1945-03-23 1948-08-03 James Clark Jr Combination positive clutch and torque responsive friction coupling
US2884103A (en) * 1954-04-08 1959-04-28 Chicago Pneumatic Tool Co Predetermined torque release mechanism
DE1678656C3 (en) * 1965-07-08 1974-07-11 Robert Bosch Gmbh, 7000 Stuttgart
US3774738A (en) * 1972-01-31 1973-11-27 Twin Disc Inc Torque limiting coupling
US3893553A (en) * 1974-05-13 1975-07-08 Quinten A Hansen Overload release clutch
US4263996A (en) * 1979-10-01 1981-04-28 Harnischfeger Corporation Readily resettable torque-limiting coupling device
US4593800A (en) * 1983-02-22 1986-06-10 Helland Research & Engineering, Inc. Torque release drive connector
US4641551A (en) * 1983-12-27 1987-02-10 Hall Surgical, Division Of Zimmer, Inc. Apparatus for translating rotational motion and torque
DE3510605C2 (en) * 1985-03-23 1988-06-16 C. & E. Fein Gmbh & Co, 7000 Stuttgart, De
DE3912790C2 (en) * 1989-04-19 1991-10-24 Metabowerke Gmbh & Co, 7440 Nuertingen, De
US5025903A (en) * 1990-01-09 1991-06-25 Black & Decker Inc. Dual mode rotary power tool with adjustable output torque
DE4445017A1 (en) * 1994-03-12 1995-09-14 Kupplungstechnik Gmbh Limited torque clutch for relief of overload
US5538089A (en) * 1995-06-05 1996-07-23 The Black & Decker Corporation Power tool clutch assembly
US5897454A (en) * 1996-01-31 1999-04-27 Black & Decker Inc. Automatic variable transmission for power tool
DE19611622C1 (en) * 1996-03-25 1997-07-24 Walterscheid Gmbh Gkn Torque limiter clutch for agricultural vehicles
DE19809133B4 (en) * 1998-03-04 2012-07-19 Scintilla Ag Hand tool, in particular drill
US6431289B1 (en) * 2001-01-23 2002-08-13 Black & Decker Inc. Multi-speed power tool transmission
DE10161356B4 (en) * 2001-12-13 2013-03-07 Hilti Aktiengesellschaft screwdriving
DE10201988C2 (en) * 2002-01-21 2003-12-24 Walterscheid Gmbh Gkn Torque limiting clutch
DE10309057B4 (en) * 2003-03-01 2007-06-06 A & M Electric Tools Gmbh Hand-operated implement with adjustable torque limiter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9550289B2 (en) 2012-12-20 2017-01-24 Black & Decker Inc. Hand-held power tool with torque limiting unit

Also Published As

Publication number Publication date
US20090020301A1 (en) 2009-01-22
WO2006061286A1 (en) 2006-06-15
CN101090806A (en) 2007-12-19
CN100586660C (en) 2010-02-03
DE102004058809A1 (en) 2006-06-08
EP1824643A1 (en) 2007-08-29
US8104546B2 (en) 2012-01-31
CN101758476A (en) 2010-06-30

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