EP1524083A1 - Dispositif pour la limitation de couple réglable d'une machine-outil à main - Google Patents

Dispositif pour la limitation de couple réglable d'une machine-outil à main Download PDF

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Publication number
EP1524083A1
EP1524083A1 EP03023024A EP03023024A EP1524083A1 EP 1524083 A1 EP1524083 A1 EP 1524083A1 EP 03023024 A EP03023024 A EP 03023024A EP 03023024 A EP03023024 A EP 03023024A EP 1524083 A1 EP1524083 A1 EP 1524083A1
Authority
EP
European Patent Office
Prior art keywords
ring
gear
adjusting
intermediate ring
locking element
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.)
Withdrawn
Application number
EP03023024A
Other languages
German (de)
English (en)
Inventor
Armin Dipl.-Ing. Eisenhardt
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.)
Techtronic Industries GmbH
Original Assignee
A&M Electric Tools GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by A&M Electric Tools GmbH filed Critical A&M Electric Tools GmbH
Priority to EP03023024A priority Critical patent/EP1524083A1/fr
Publication of EP1524083A1 publication Critical patent/EP1524083A1/fr
Withdrawn legal-status Critical Current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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/141—Mechanical overload release couplings
    • 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 invention relates to a device for adjustable Torque limitation of a hand-held machine tool, in particular a drill or the like with the features according to the preamble of claim 1.
  • An adjustable torque limit is desired.
  • Dependent of different screwing can be a customized Torque can be adjusted by means of which a Screw is firmly tightened without turning off its head.
  • For Operation as a drilling machine is intended to limit the torque be switched off.
  • From DE 102 02 262 A1 is a hand-held, battery-powered Drill with a torque limit known.
  • the drill has a multi-stage planetary gear on.
  • the ring gear of a drive-side first gear stage is by means of an axially displaceable spring-biased Pin fixed in the direction of rotation.
  • the ring gear when exceeded a certain torque against the pin slip.
  • the torque that can be transferred to a tool is limited by the limit torque, up to the Ring gear still be held by the axially biased pin can.
  • a rotatable ring provided, the inside a spiral-shaped, in Having axially extending oblique ramp. at a rotation of the ring is on the slope of the ramp Pin axially displaced, in turn, a helical compression spring biases.
  • This helical compression spring acts on the on Ring gear applied latching pin.
  • Upon rotation of the adjusting ring rubs the sloping ramp on the adjacent pin. This experiences not only axial forces but also perpendicular to them Radial forces that can lead to tilting. It kick high surface pressures between pin and ramp.
  • the order a single eccentric spring pin can also to a tilting of the adjusting ring and / or the ring gear to lead.
  • the invention is based on the object, an adjustable Torque limitation in such a way that at safer Functioning a limit torque is sensitively adjustable.
  • the task is performed by a device for adjustable Torque limitation solved with the features of claim 1.
  • the intermediate ring at least one and in particular three distributed around the circumference, radially inwardly extending noses, which in corresponding arranged on the outside of the transmission housing longitudinal grooves intervention.
  • the leadership of the noses in the longitudinal grooves results a reliable and almost wear-free torque protection with free and tilt-safe axial guidance.
  • a locking element and in particular three around the circumference distributed latch elements advantageous in the corresponding Guided longitudinal grooves, wherein they frontally to the respective Nose. This results in a lateral force-free axial guidance the locking elements.
  • Their sinking in the grooves requires no additional space in the radial direction.
  • the adjustment and the intermediate ring at least one and in particular three in axial direction, sloping ramps and a corresponding number of adjacent to the respective ramp Feet arranged.
  • the adjustable foot is advantageous arranged on the intermediate ring and the ramp on the adjustment. However, it can also be a reverse arrangement appropriate be.
  • the ramps and extending in the axial direction extending feet result in a corresponding relative movement to each other to an axial displacement of the intermediate ring.
  • the between ramp and adjusting foot occurring frictional forces are by the circumferentially fixed and axially displaceable guide of the intermediate ring functionally reliable.
  • the adjustment is advantageous as a the intermediate ring enclosing, rotatable adjustment formed.
  • the adjusting ring is encompassable on all sides by the user and thus easy to operate.
  • the arrangement of the intermediate ring within of the adjusting ring leads to a compact design.
  • ramp and adjustable foot expediently have a in the direction of rotation of the Adjusting ring acting mutual stop. A rotating one Impact force is doing of the rotationally fixed leadership of Intermediate ring reliably received.
  • the adjustment range the adjusting ring is reliably limited, without a separate, towards the device housing acting stop required would.
  • the ramp in its oblique extending part of gradations In particular in connection with numbers, for example, on the adjustment ring is the Find a desired torque setting based on the numbered stages.
  • the grading can also be formed as a detent for the adjustment. It has in particular, a training has been found to be appropriate, in which the detent is biased in the radial direction, in particular a compression spring and a ball comprehensive locking element having.
  • the locking element is advantageous in the Adjusting ring arranged and engages in the circumferential side of the gear housing arranged latching depressions. It results a space-saving design in relation to the axial direction.
  • the separation of the circumferentially acting detent from the power transmission between ramp, intermediate ring and locking element leads to a low-friction, sensitive adjustable Preselection of torque limitation.
  • the locking element advantageously has a spring and an a cam of the ring gear in the circumferential direction attacking ball on.
  • the planetary gear is a multi-stage gear, wherein the locking element on the ring gear the drive-side first gear stage acts, and wherein the Adjustment and the intermediate ring circumferentially another Gear stage are arranged.
  • the axial direction is no additional, over the length of the multi-stage transmission additional space required.
  • Fig. 1 shows in a perspective exploded view the essential components of a planetary gear 1 of a battery operated drill. It can also be a mains powered Screw and / or drill and another hand-held Machine tool with an adjustable torque limit be appropriate.
  • the planetary gear 1 has a Gear housing 6, in which a ring gear 2 rotatably arranged is. The corresponding sun and planet wheels are the better clarity not shown.
  • the gear housing 6 has three outside in the circumferential direction offset at an angle of 120 ° to each other arranged longitudinal grooves 8, in which locking elements 3 longitudinally displaceable are guided.
  • the locking elements 3 act elastically resiliently biased in the axial direction on the Ring gear 2 for setting a limit torque. details These are in connection with Figs. 2 and 3 closer described.
  • an intermediate ring 5 the three offset by 120 ° mutually arranged, radially inwardly extending Noses 7 has.
  • the Noses 7 in the longitudinal grooves 8, wherein the intermediate ring 5, the transmission housing 6 encompasses the outside.
  • the noses 7 lead in the longitudinal grooves 8 to a rotationally fixed mounting of the intermediate ring 5, wherein this on the circumference of the transmission housing. 6 Slidably guided in the axial direction approximately free of play is.
  • the spring-biased locking elements are 3 frontally to the respective lugs 7 at.
  • Arrangement with three locking elements 3 and a corresponding Number of noses 7 can also be an arrangement with a different number of locking elements 3 expedient be.
  • an adjustment 4 which in the shown Embodiment is formed as an adjustment ring 11, the the intermediate ring 5 engages on the outside in the mounted state.
  • the inside of the adjusting ring 11 is slidably on the outside of the intermediate ring 5 out.
  • Inside facing the adjusting ring 11 integrally formed ramps 9, with their oblique surfaces spiral and thereby in the axial direction extending.
  • the intermediate ring 5 points in axial direction on its ramps 9 side facing a number of feet 10, which under the pressure of the spring preload the locking elements 3 in the axial direction abut the respective ramps 9.
  • In the illustrated embodiment are three each 120 ° to each other in the circumferential direction staggered ramps 9 and a corresponding number provided by feet 10. It can also be a deviant Number be appropriate. It can also be an arrangement be appropriate, in which the feet 10 on the locking element. 3 and the ramps 9 are provided on the intermediate ring 5.
  • the ramps 9 may be formed steadily rising. Im shown Embodiment, they are provided with gradations 13, in their division with the outside of the adjusting ring 11 attached symbols 24 match.
  • the gradations 13 can be designed as a detent for the feet 10. in the shown embodiment, they are staircase-shaped without Detent action formed.
  • a detent 14 is provided, which in the embodiment shown Locking elements 17, comprising a compression spring 15 and have a ball 16.
  • Locking elements 17, comprising a compression spring 15 and have a ball 16.
  • the gear housing 6 on the outside locking recesses 18, in which the balls 16 engage.
  • the balls 16 roll under pressure by the spring 15 through the various locking recesses 18th
  • each ramp 9 a stop 12 is provided, with a corresponding stop 12 of the associated Leveling foot 10 cooperates.
  • a stop 12 of the associated Leveling foot 10 cooperates.
  • About the non-rotatable leadership of Intermediate ring 5 on the gear housing 6 is thus the range of rotation of the adjusting ring 11 limited.
  • intermediate ring 5 rotatably on a device housing and longitudinally displaceable is guided. It may also be appropriate to provide a stop 12 and / or a detent 14, the acts between the adjusting element 4 and a device housing.
  • Fig. 2 shows a longitudinal sectional view of the arrangement of Fig. 1 in the assembled state.
  • the planetary gear 1 has a drive-side first gear stage 22 with the Ring gear 2 and an indicated output side second gear stage 23 on. It can also be a planetary gear 1 with be provided further gear stages.
  • the locking element 3 includes in the illustrated embodiment a pin 25 on which in the direction of the ring gear 2, a pin 26 with a reduced Outside diameter connects. On his thong 26 opposite end face of the pin 25 is flat the corresponding nose 7 of the intermediate ring 5 at. On the Pin 26 of the pin 25 is a helical compression spring 19th held, the outer diameter of which corresponds to the pin 25.
  • a ball 20 is arranged, which is under the biasing force the compression spring 19 on a front-side cam track 27 of the ring gear 2 is applied.
  • the circumferential cam track 27 has three circumferentially distributed, axially projecting cam 21st on, in which a total of three locking elements 3 each with abut their balls 20 held in the circumferential direction. It results this is a latching positive engagement between the in the circumferential direction fixed locking element 3 and the ring gear. 2 Below one depending on the biasing force in the spring 19th predetermined limit torque, the ring gear 2 is relatively rotationally fixed via the cams 21 and the locking elements 3 with the transmission housing 6 connected.
  • the intermediate ring 5 is shown in a rotational position in which the stops 12 are spaced from each other.
  • the adjustable feet 10 lie in a central region of the respective ramp 9, resulting in a mean biasing force in the compression spring 19th and thus a mean limit torque in the planetary gear 1 results.
  • the adjusting ring 11 and the intermediate ring 5 enclose the transmission housing 6 outside approximately in the range of the second gear stage 23.
  • Fig. 3 shows the arrangement of Fig. 2, wherein the adjusting ring 11 is rotated so far that the intermediate ring 5 means the ramp 9 is axially displaced so far that the pin 26th of the pin 25 is flush with the ball 22.
  • the ball 20 is held positively against the cam track 27 fitting. In the circumferential direction results in a positive connection between the cam 21 and the balls 20, as a result of the ring gear 20 rotatably without torque limiter for example for a Drilling operation is held. It can also be an arrangement appropriate be, in which a positive fixing of the ball 20 achieved over a compression of the spring 19 to block length becomes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)
EP03023024A 2003-10-13 2003-10-13 Dispositif pour la limitation de couple réglable d'une machine-outil à main Withdrawn EP1524083A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03023024A EP1524083A1 (fr) 2003-10-13 2003-10-13 Dispositif pour la limitation de couple réglable d'une machine-outil à main

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03023024A EP1524083A1 (fr) 2003-10-13 2003-10-13 Dispositif pour la limitation de couple réglable d'une machine-outil à main

Publications (1)

Publication Number Publication Date
EP1524083A1 true EP1524083A1 (fr) 2005-04-20

Family

ID=34354435

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03023024A Withdrawn EP1524083A1 (fr) 2003-10-13 2003-10-13 Dispositif pour la limitation de couple réglable d'une machine-outil à main

Country Status (1)

Country Link
EP (1) EP1524083A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1935569A1 (fr) * 2006-12-21 2008-06-25 HILTI Aktiengesellschaft Outil doté d'un accouplement à glissement
CN102101286A (zh) * 2009-12-18 2011-06-22 罗伯特.博世有限公司 手持工具机、尤其蓄电池式手持工具机
CN108626326A (zh) * 2018-06-21 2018-10-09 浙江明磊新能源科技有限公司 一种齿轮箱及带有该齿轮箱的电动工具
CN111473220A (zh) * 2020-04-03 2020-07-31 杭州福廷科技有限公司 一种显示器调节控制结构
CN113001478A (zh) * 2019-12-19 2021-06-22 罗伯特·博世有限公司 用于手持式工具机的手持式工具机设备及钻锤

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5277527A (en) * 1991-03-29 1994-01-11 Ryobi Limited Torque adjustment device
US5356350A (en) * 1991-07-15 1994-10-18 C. & E. Fein Gmbh & Co. Motor-driven screwdriver with variable torque setting for equal torques regardless or countertorques by fasteners
US5437524A (en) * 1994-06-02 1995-08-01 Huang; Jin-Tarn Torque-adjustment controller
US6076438A (en) * 1996-03-11 2000-06-20 Atlas Copco Tools Ab Power nutrunner with torque release clutch and a setting tool
US6196943B1 (en) * 1999-10-13 2001-03-06 Trinity Metallize Co., Ltd. Electric tool knob control apparatus
DE10202262A1 (de) * 2001-01-23 2002-09-26 Black & Decker Inc Mehrstufiges Getriebe für Motorwerkzeug
WO2003064890A1 (fr) * 2002-01-25 2003-08-07 Black & Decker, Inc. Système de navigation dynamique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5277527A (en) * 1991-03-29 1994-01-11 Ryobi Limited Torque adjustment device
US5356350A (en) * 1991-07-15 1994-10-18 C. & E. Fein Gmbh & Co. Motor-driven screwdriver with variable torque setting for equal torques regardless or countertorques by fasteners
US5437524A (en) * 1994-06-02 1995-08-01 Huang; Jin-Tarn Torque-adjustment controller
US6076438A (en) * 1996-03-11 2000-06-20 Atlas Copco Tools Ab Power nutrunner with torque release clutch and a setting tool
US6196943B1 (en) * 1999-10-13 2001-03-06 Trinity Metallize Co., Ltd. Electric tool knob control apparatus
DE10202262A1 (de) * 2001-01-23 2002-09-26 Black & Decker Inc Mehrstufiges Getriebe für Motorwerkzeug
WO2003064890A1 (fr) * 2002-01-25 2003-08-07 Black & Decker, Inc. Système de navigation dynamique

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1935569A1 (fr) * 2006-12-21 2008-06-25 HILTI Aktiengesellschaft Outil doté d'un accouplement à glissement
US7806200B2 (en) 2006-12-21 2010-10-05 Hilti Aktiengesellschaft Power tool with a slip clutch
CN101204805B (zh) * 2006-12-21 2013-05-08 希尔蒂股份公司 具有一个滑动离合器的工具机
CN102101286A (zh) * 2009-12-18 2011-06-22 罗伯特.博世有限公司 手持工具机、尤其蓄电池式手持工具机
GB2476560A (en) * 2009-12-18 2011-06-29 Bosch Gmbh Robert Bias switch to change mode of a power tool
GB2476560B (en) * 2009-12-18 2012-05-30 Bosch Gmbh Robert Switch construction in a power hand tool
CN102101286B (zh) * 2009-12-18 2015-11-25 罗伯特.博世有限公司 手持工具机、尤其蓄电池式手持工具机
US9573264B2 (en) 2009-12-18 2017-02-21 Robert Bosch Gmbh Handheld power tool
CN108626326A (zh) * 2018-06-21 2018-10-09 浙江明磊新能源科技有限公司 一种齿轮箱及带有该齿轮箱的电动工具
CN108626326B (zh) * 2018-06-21 2023-11-14 浙江明磊锂能源科技股份有限公司 一种齿轮箱及带有该齿轮箱的电动工具
CN113001478A (zh) * 2019-12-19 2021-06-22 罗伯特·博世有限公司 用于手持式工具机的手持式工具机设备及钻锤
CN111473220A (zh) * 2020-04-03 2020-07-31 杭州福廷科技有限公司 一种显示器调节控制结构

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