EP1030762B1 - Motorisch angetriebener handschrauber - Google Patents

Motorisch angetriebener handschrauber Download PDF

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Publication number
EP1030762B1
EP1030762B1 EP99955686A EP99955686A EP1030762B1 EP 1030762 B1 EP1030762 B1 EP 1030762B1 EP 99955686 A EP99955686 A EP 99955686A EP 99955686 A EP99955686 A EP 99955686A EP 1030762 B1 EP1030762 B1 EP 1030762B1
Authority
EP
European Patent Office
Prior art keywords
torque
screwdriver
handheld
head
screwdriver according
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.)
Expired - Lifetime
Application number
EP99955686A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1030762A1 (de
Inventor
Konstanze Saathoff
Achim LÜBBERING
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.)
Johannes Luebering AG
Johannes Luebbering AG
Original Assignee
Johannes Luebering AG
Johannes Luebbering AG
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 claimed from DE1998141870 external-priority patent/DE19841870A1/de
Priority claimed from DE29908022U external-priority patent/DE29908022U1/de
Priority claimed from DE29910742U external-priority patent/DE29910742U1/de
Application filed by Johannes Luebering AG, Johannes Luebbering AG filed Critical Johannes Luebering AG
Publication of EP1030762A1 publication Critical patent/EP1030762A1/de
Application granted granted Critical
Publication of EP1030762B1 publication Critical patent/EP1030762B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • B25B13/461—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
    • B25B13/462—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis
    • B25B13/463—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis a pawl engaging an externally toothed wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/004—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/142—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
    • B25B23/1422—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters
    • B25B23/1427—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters by mechanical means

Definitions

  • the invention relates to a motor-driven handheld screwdriver according to the preamble of claim 1.
  • Such screwdrivers are used, for example, in the automotive sector, especially in the manufacturing plants but also in repair shops used. In practice, they are hand-held Devices referred to as handheld screwdrivers, even if these Devices are motor-driven. Below are these Devices referred to as stick screwdrivers if they are a stick-shaped Have housings, and they are called pistol screwdrivers, if their housing is angled. With Angle headed screwdrivers are often not more than a stick screwdriver, but then as an "angle screwdriver" designated. A head is designated as an angle head, the Drive shaft angled relative to its output shaft is, often at an angle of 90 °.
  • Safety-relevant screw connections e.g. B. in the field of Steering or the braking system
  • a two-stage suit carried out: first, if possible fast screwing to about 80 or 90% of the target tightening torque carried out, followed by a comparative slowly tighten the screw.
  • the discharge between these two levels in the suit contributes to the seating behavior of the screw connection and provides with the the tightening torque actually achieved is a special one reliable compliance with the desired or Nominal torque safe.
  • the slower one by comparison Tightening the screw connection in the second stage represents a Adherence to the nominal torque as precise as possible.
  • the first, fast suit with such a two-stage screw connection is usually done by means of the motor mentioned Hand Held Devices.
  • the end of this motorized first suit the screw is reached by a torque limiter, which is realized directly in the handheld screwdriver is, or in pneumatic so-called “stall screwdrivers" can the maximum torque to be applied by the Limited air pressure with which the tool is driven, so that here the torque limiter assigned to the drive motor realized outside of the actual tool is.
  • the torque wrench has the required accuracy so that within the specified tolerances of the torque wrench exactly at the previously set nominal torque triggers, for example by means of a kink mechanism, so that a clearly audible click and a certain idle stroke of the torque wrench is generated, which the achievement of correct tightening torque. From practice are adjustable or are preset at the factory Torque wrench known. a shows a torque wrench designed as a kink wrench also DE AS 21 06 263.
  • DE-A-43 42 464 shows just like DE-U-1 871 193 one Generic, manually operated torque wrench, on which an electric motor is placed.
  • This torque wrench enables a motorized fixed or Loosening the screw connection with low torque, followed by the otherwise unchanged torque wrench is used in a manner known per se.
  • the Handling of this device is cumbersome because it is due to the mounted motor comparatively large dimensions and thus poor accessibility to tight screwing points having.
  • the handling will continue impaired that the comparatively high weight of the engine relatively far outside the longitudinal axis of the torque wrench lies, so that the user always this eccentricity compensate with a correspondingly firmer, tiring grip must to avoid undesired tilting movements of the tool to avoid its longitudinal axis.
  • the invention has for its object a motor-driven Handheld screwdriver to create a quick work and quick completion of a fitting, too with two-stage suit, favored with high accuracy.
  • the invention proposes as a first Step forward, the motor provided in the handheld screwdriver Equip the drive with a first torque limiter and an additional ratchet drive with its own torque limiter to be provided, as with torque wrenches are provided.
  • the "ratchet drive” each drive designates the transmission of a tightening torque in one direction and in the opposite direction of rotation runs freely, e.g. B. a ring gear with locking device, which a finding or leading in allows one direction, often one in technology Ratchet drive is also called freewheel.
  • the proposal according to the invention therefore ensures that after attaching the hand screwdriver to the screw fixing the screw driven by the motor Handheld screwdriver can be made up to its torque limiter triggers, and that now, without a decrease in the Handheld screwdriver is required, then with this Handheld screwdriver controls or reaches the correct torque can be by now namely the handle of the Screwdriver serves as a handle for the torque wrench and the two operations "fixing the screw” and "Control of the screw” by one person in one pass can be carried out without changing tools, d. H. the The torque wrench is not operated by the motor drive, but by purely manual operation of the screwdriver until the one in the head and the ratchet drive assigned second torque limiter triggers.
  • the two torque limiters for the motor one and on the other hand the manual use of the hand screwdriver are typically set to different values, so that without any adjustment or change on Hand screwdriver having to make screw connections two different achievable moments and accordingly screw connections tightened in two stages are possible.
  • Torque limiter there is always the additional, in the head torque limiter provided by the hand screwdriver, during the first, the motor drive of the Torque limiter assigned to the hand screwdriver as an integral, anyway existing part of the hand screwdriver is viewed or as an external facility, such as one Pneumatic stripping screwdriver supplied air pressure.
  • the torque wrench that the manually operated handheld screwdriver forms can in a known manner as Kink wrench or be designed as a bending beam, with Training of the torque wrench as a kink wrench mechanical control takes place while training the Torque wrench as an electronic bending beam Control can be provided.
  • the nominal or nominal torque at which the torque limiter triggers is usually above the shutdown torque of the motor-driven screwdriver.
  • the two-stage screw connection first by the on Screwdriver already provided switch as with a motor powered handheld screwdriver common at a given Moment that triggers about 80 or 90% of the target torque can correspond. This can e.g. with an electric powered handheld screwdriver done by a sensor that triggers the engine shutdown.
  • the screwdriver can be used not by hand but by hand driven screwdriver used as a torque wrench be until the torque limiter under this second tightening or screwing stage at 100% of the preset Triggers the desired tightening torque, which is not the actual one Handheld screwdriver, but on the torque limiter is set.
  • This setting can be specified by the manufacturer and thus tamper-proof, but can be advantageous a user adjustability can be provided, so that the handheld screwdriver has different screwing conditions is easily adaptable.
  • the proposed handheld screwdriver will be a significant one Simplification of the workflow enables the user does not have to constantly handle two different devices. Thereby, that the motorized handheld screwdriver with his comparatively sensitive mechanics filed again to be able to take a torque wrench also a protection of this comparatively expensive and sensitive tool causes so that its life is extended.
  • the torque limiter and the ratchet drive arranged together in the head of the screwdriver. On in this way a compact assembly is created in which the individual functional parts optimally adjusted to each other and are adapted to each other.
  • An adapter can advantageously be provided, on the one hand connects to a standardized drive shaft of the head and on the other hand - depending on the basic body used of the existing screwdriver - one on its output shaft has adapted connection. That way is one inexpensive manufacture of the designed according to the invention Heads in large numbers possible, the adaptation to a variety of different types of screwdriver also comparatively inexpensive way by using appropriate Adapter.
  • the drive shaft of the head even without an adapter already for connection to a certain type of output shaft is designed so that with such an output shaft designed screwdriver without using an adapter the head designed according to the invention can.
  • the torque limiter can advantageously be used as a buckling element in be designed in a known manner, so that by the Bending the user away from reaching the specified target torque is displayed and the handling of the Screwers - except for the relief mentioned - on that Known users can be done without getting used to.
  • An optical display can advantageously be provided, which at Reached the specified target torque becomes.
  • an electrical signal transmitter can be provided, which at Reaching the specified target tightening torque Signal generated.
  • These signals can be wired or wireless, e.g. B. by radio, for example to one of the handheld screwdriver remote central control, which are transmitted the number of screw connections made and / or the strength of the tightening torques, at least reaching one predetermined target moments, can register.
  • Such signals of the electronic signal generator can, however can also be evaluated on the handheld screwdriver itself an electronic circuit that, for example, when reached the specified tightening torque an acoustic or optical Signaling with electrical means, for example through an indicator lamp or through a high frequency Beep triggers.
  • the electrical signals of the signal generator by the electrical Circuit can also be evaluated according to a given Number of screw connections carried out correctly trigger mentioned optical and / or acoustic display.
  • the worker can perform a functional check of his Work to be provided in a supportive manner For example at the screwing of wheels using five screws each after performing five correct screw connections Triggered. It is therefore easy for the worker reliable control of his work possible by following each properly screwed wheel the receipt signal or the visual display appears.
  • the mechanical or electrical, optical can be advantageous or acoustic display on the head of the hand screwdriver his. It is therefore not only optimal in the field of vision or hearing arranged by the worker, but in this way can the embodiment of the invention is also particularly advantageous Head all the advantageous functions and display options have, so that a particularly simple retrofitting existing Hand screwdriver is possible or a particularly simple one Repair of handheld screwdrivers is made possible by the head, which has all functions, is completely replaced can be.
  • the handheld screwdriver is an elongated Housing is designed, the handling of the hand screwdriver in contrast to the pistol screwdrivers mentioned simplified with a manual operation, as it is similar to conventional, also designed rod-shaped torque wrench is and accordingly a familiar handling allows.
  • a flat drive be arranged on the head of the screwdriver. This can in a manner known per se by plugging onto the output shaft the hand screwdriver or the angle head, so that depending on the situation, the flat drive is used or from Hand screwdriver can be removed. Alternatively, it is for achievement particularly compact tool dimensions possible, to integrate such a flat output directly into the head.
  • An open flat drive can advantageously be provided be, e.g. B. to enable screw connections to pipes.
  • the handle of the hand screwdriver is advantageous not only for Designed actuation of the drive motor, for example with a trigger switch for the motor, but such designed as a grip area that the entire hand screwdriver how a purely hand-operated screwdriver can be handled.
  • the transmission is of high tightening torques possible where conventional motorized handheld screwdrivers would be destroyed, for example that 2 times or even more than 10 times that of the motor torque to be applied.
  • a cordless screwdriver can be compared to the conventional 15 Nm tightening torques of 40, 50, 100 or even more than 150 Nm may be possible.
  • the housing can be made of plastic, in particular a fiber-reinforced one Plastic exist if the desired flexural strength the housing is guaranteed.
  • the housing are made of metal, here in favor of one Fatigue-free handling, preferably made of light metal.
  • 1 is generally the head of a hand screwdriver indicated.
  • the head 1 is designed as an angle head and on a rod-shaped housing of a so-called Fixed screwdriver, the housing made of a light metal alloy there is a high flexural strength of the Enables housing.
  • the stick screwdriver contains a complete Drive unit with an energy store or a connection for a power supply, a drive motor, an actuation switch for the drive motor and with a built-in Torque limiter that connects the engine to the output shaft the drive unit transmissible torque to known Way limited, e.g. B. in an electric motor by switching off of the motor, with a compressed air motor by partial or complete bypass of the drive air or the like Wise.
  • Rod screwdrivers are known per se, so that for reasons of clarity only the end of a shaft 2 this Straight screwdriver can be seen in the drawing.
  • the head 1 has a housing 3, in which one per se Known angular arrangement for force deflection is provided.
  • An output shaft 4 is provided on the head 1, which with its free end is designed as a square and for receiving of sockets.
  • the output shaft 4 is extended to the rear, one or can be configured in several parts. It extends the actual housing 3 of the head 1 and extends itself into a torque limiter which can be seen in particular from FIG. 2 5.
  • This is similar to a basically known one Torque wrench as a so-called kink wrench designed. It has a ratchet drive 6 with a changeover switch 7 for the selection of the torque-transmitting working direction, and it has an articulated joint 8, the articulated body of which 9 between a first, indicated by a spring 10 loaded bracket and a second bracket 15 machined is.
  • the spring 10 can be adjusted with the aid of an adjusting screw 11 can be relaxed or tensioned so that the preload for the articulated joint 8 is adjustable and thus the torque, in which the articulation 8 is bent.
  • the bracket 15 is pivotally mounted about a pivot axis, which coincides with the axis of the output shaft 8.
  • Such a lever arm would switch off the Torque limiter 5 can be influenced in that the handheld screwdriver at different points on its shaft is handled and in that the user may in his hand gesture between the palm of the hand and the thumb applies leverage and thus a moment in the handheld screwdriver initiates, which acts as a shear force on the lever, between the storage of the bracket of the articulated joint and the torque limited shaft.
  • Such Influences are excluded in the hand screwdriver shown, so that the shutdown torque of the Torque limiter 5 reliable and with high uniformity is observed, so that overall very precise Allow screw connections to be achieved.
  • the torque is limited Shaft also the output shaft 4 of the Manual wrench.
  • the bracket 15 coincides, the positive described remain effects:
  • the Screw axis not as in the illustrated embodiment with the pivot axis of the bracket 15 together.
  • the torque-limited axis namely an output shaft, which serves as the drive shaft for the flat output, with this Pivot axis of the bracket 15 together, so that the described Benefits remain.
  • the housing 3 surround the torque limiter 5, so that for the user outside the housing 3 only the set screw 6 and an operating handle for the switch 7 visible are.
  • the head 1 is attached to the shaft 2 by means of an adapter 12:
  • the adapter 12 has a housing 14, which on the one hand Has connecting means for the output shaft of the screwdriver and which on the other hand connecting means for the drive shaft of the head 1.
  • the head 1 can be connected to different types of Handheld screwdrivers can be used and vice versa Shaft 2 shown by using appropriate adapters a variety of differently designed heads use Find.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
EP99955686A 1998-09-14 1999-09-14 Motorisch angetriebener handschrauber Expired - Lifetime EP1030762B1 (de)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
DE1998141870 DE19841870A1 (de) 1998-09-14 1998-09-14 Motorisch angetriebener Handschrauber
DE19841870 1998-09-14
DE29908023U 1999-05-05
DE29908023 1999-05-05
DE29908022U 1999-05-05
DE29908022U DE29908022U1 (de) 1999-05-05 1999-05-05 Handgehaltener, motorisch angetriebener Handschrauber mit Gehäuse
DE29910742U 1999-06-19
DE29910742U DE29910742U1 (de) 1998-09-14 1999-06-19 Motorisch angetriebener Handschrauber
PCT/DE1999/002906 WO2000015393A1 (de) 1998-09-14 1999-09-14 Motorisch angetriebener handschrauber

Publications (2)

Publication Number Publication Date
EP1030762A1 EP1030762A1 (de) 2000-08-30
EP1030762B1 true EP1030762B1 (de) 2002-08-14

Family

ID=27438860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99955686A Expired - Lifetime EP1030762B1 (de) 1998-09-14 1999-09-14 Motorisch angetriebener handschrauber

Country Status (9)

Country Link
US (1) US7069816B1 (ja)
EP (1) EP1030762B1 (ja)
JP (1) JP2002524294A (ja)
CN (1) CN1128696C (ja)
AT (1) ATE222159T1 (ja)
BR (1) BR9906946A (ja)
ES (1) ES2182579T3 (ja)
PT (1) PT1030762E (ja)
WO (1) WO2000015393A1 (ja)

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JP3983027B2 (ja) * 2001-10-29 2007-09-26 株式会社空研 トルクレンチ
FR2856324B1 (fr) * 2003-06-20 2006-12-29 Chih Ching Hsien Structure de cle munie d'un mecanisme d'entrainement
JP2006346795A (ja) * 2005-06-15 2006-12-28 Shinano Seisakusho:Kk トルクレンチ
GB2445826B (en) * 2006-11-16 2010-06-09 Bosch Gmbh Robert Toolroom ratchet
DE102006054190A1 (de) * 2006-11-16 2008-05-21 Robert Bosch Gmbh Werkzeugratsche
US7823486B2 (en) 2008-05-09 2010-11-02 Wise Robert W Cordless motor assisted torque wrench
SE532720C2 (sv) 2008-12-22 2010-03-23 Atlas Copco Tools Ab Handhållen mutterdragare med manuellt styrt effektstyrorgan
GB2470228A (en) * 2009-05-15 2010-11-17 Crane Electronics Electronic Torque Wrench with Click Mechanism
EP2338644B1 (en) 2009-12-18 2019-06-26 Techtronic Power Tools Technology Limited Multi-function tool system
US9038504B2 (en) * 2012-10-17 2015-05-26 Snap-On Incorporated Auto-shift reversing mechanism
WO2018088443A1 (ja) * 2016-11-10 2018-05-17 日東工器株式会社 電動工具並びにその制御装置及び制御回路
DE102017109117B4 (de) * 2017-04-27 2021-05-06 Wiha Werkzeuge Gmbh Schraubendreher und Verfahren zum Anziehen einer Schraube
CN111208163A (zh) * 2018-11-21 2020-05-29 中国科学院化学研究所 可充/抽气式xps冷冻-准原位样品转移装置
TWI691385B (zh) * 2018-11-29 2020-04-21 胡厚飛 具有扭力設定之電動快轉扳手
CN112945448A (zh) * 2019-12-11 2021-06-11 上海贝力仪器有限公司 一种工程紧固力稳定性实时监控系统
CN112045405B (zh) * 2020-09-22 2024-06-21 沈阳航空航天大学 一种狭小长空间盲腔快速大力矩拧紧装置及拧紧方法

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Also Published As

Publication number Publication date
CN1287520A (zh) 2001-03-14
CN1128696C (zh) 2003-11-26
WO2000015393A1 (de) 2000-03-23
US7069816B1 (en) 2006-07-04
JP2002524294A (ja) 2002-08-06
ATE222159T1 (de) 2002-08-15
ES2182579T3 (es) 2003-03-01
EP1030762A1 (de) 2000-08-30
PT1030762E (pt) 2002-12-31
BR9906946A (pt) 2002-05-14

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