EP0331868B1 - Drehmomentschlüssel - Google Patents

Drehmomentschlüssel Download PDF

Info

Publication number
EP0331868B1
EP0331868B1 EP89100363A EP89100363A EP0331868B1 EP 0331868 B1 EP0331868 B1 EP 0331868B1 EP 89100363 A EP89100363 A EP 89100363A EP 89100363 A EP89100363 A EP 89100363A EP 0331868 B1 EP0331868 B1 EP 0331868B1
Authority
EP
European Patent Office
Prior art keywords
outer housing
handle
set forth
spring
dynamometric key
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
EP89100363A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0331868A2 (de
EP0331868A3 (en
Inventor
Klaus Neuhaus
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.)
Stahlwille Eduard Wille GmbH and Co KG
Original Assignee
Eduard Wille GmbH and Co KG
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 Eduard Wille GmbH and Co KG filed Critical Eduard Wille GmbH and Co KG
Priority to AT89100363T priority Critical patent/ATE104196T1/de
Publication of EP0331868A2 publication Critical patent/EP0331868A2/de
Publication of EP0331868A3 publication Critical patent/EP0331868A3/de
Application granted granted Critical
Publication of EP0331868B1 publication Critical patent/EP0331868B1/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
    • 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

  • DE-A-679 042 shows a wrench with limited force.
  • two obliquely cut-off housing parts a housing part on the tool side and a housing part on the handle side, are connected to one another by a pivot axis.
  • a spiral spring is on one side supported on this swivel axis and on the other hand on a transverse axis attached in the tool-side housing part.
  • On the opposite side there is a set screw on the spiral spring between these two axes.
  • a desired pre-tension of the spiral spring can be set on the adjusting screw.
  • a handle sits on the end of the spiral spring protruding from the handle-side housing part.
  • a nose sits on the spiral spring, which engages over a pawl pivotally mounted on the handle-side housing part and holds it in its operative position.
  • the pawl engages over a catch provided on the tool-side housing part and holds the housing parts in an extended working position with respect to one another.
  • the housing part on the tool side carries a tool.
  • the spiral spring bends.
  • the nose releases the pawl.
  • the pawl in turn releases the catch so that the housing parts buckle.
  • US-A-4 655 104 shows a torque wrench in which the inner part is a solid body which is mounted in the outer housing at its first end and carries a tool at its end which protrudes from the outer housing.
  • a handlebar is articulated at one end to the handle-side end of the inner part.
  • At the other end of the handlebar sits a pin, which is pressed by a spring acting in the longitudinal direction of the outer housing.
  • the inner part and the spring-loaded handlebar form a toggle lever mechanism, which triggers when a predetermined torque is exceeded while overcoming the spring preload and allows an audible and tactile snap movement of the inner part relative to the outer housing.
  • toggle mechanism consists of a spring-loaded lever which is connected to a roller or otherwise on the inner wall of the outer housing is supported, and a handlebar that connects this lever to the inner part.
  • the toggle lever mechanism contains a lever which is pivotably mounted in the outer housing and the handle part, which thus consists of one part. One end of this lever presses on the handle-side end of the inner part. The other end of the lever is connected via a link to a spring-loaded slider that is longitudinally movable in the outer housing.
  • the invention has for its object to provide a simple and lightweight torque wrench.
  • the invention is further based on the object of moving the pivot point of the inner part closer to the screw pivot point and thereby reducing the dependence of the trigger point on the force application point at which the user engages on the handle part.
  • the invention is further based on the object of increasing the length of the lever arm on which the toggle lever mechanism engages in a torque wrench with a toggle lever mechanism, so that the effective forces and the preload of the spring can be reduced.
  • the required stability can be achieved with a relatively small wall thickness of the outer housing.
  • the torques effective on the inner part are smaller.
  • the inner part can therefore be made considerably lighter than in the known torque wrenches described. This results in a total weight reduction of the entire torque wrench with the same dimensions and the same torques.
  • the distance between the tool and the pivot point between the outer housing and the inner part can be reduced. Since the toggle lever mechanism acts on the outer housing as the part carrying the tool and not on the inner part, the point of application of the toggle lever mechanism can be shifted towards the handle side. Both influences act in the sense of an enlargement of the "function lever", ie the lever arm with which the toggle lever mechanism acts on the inner part.
  • the pivot point of the inner part can be moved closer to the screw pivot point.
  • Embodiments of the invention are the subject of the dependent claims.
  • the torque wrench has an outer housing 10, which is formed by a profile tube of rectangular cross section. At its right end in FIG. 1, the profile tube 10 forms a grip part 12 on which the hand of the user engages.
  • the mean force application point is designated 14.
  • an inner part 16 is pivotally mounted in the outer housing 10 about a bearing pin 18.
  • the inner part 16 is formed by a solid forged part.
  • the inner part 16 protrudes on the left in FIG. 1 from the outer housing 10 and forms a tool holder 20 for an insertion tool 22.
  • the insertion tool 22 acts around a screw pivot point 24.
  • a shaft 26 of the inner part 16 projects to the right in FIG.
  • a two-armed lever 30 is mounted on a journal 28.
  • the two-armed lever 30 has a nose 32.
  • the nose 32 bears against the inner part 16.
  • the second arm of the lever 30 is connected via a link 34 to a slider 36 which is slidably guided in the outer housing 10.
  • the slider 36 is under the influence of a spring 38 which is supported on a nut 40.
  • the nut 40 is guided non-rotatably in the cross-sectionally rectangular outer housing and is seated on a threaded spindle 42.
  • the threaded spindle 42 is rotatably but axially immovably mounted in a bearing part 44.
  • the threaded spindle 42 can be rotated by a button 46.
  • the nut 40 is axially adjusted and the bias of the spring 38 is changed.
  • the spring 38, the link 34 and the lever 30 form a toggle lever mechanism 48.
  • the spring 38 seeks to pivot the lever 30 counterclockwise via the link 34, which includes an angle with the longitudinal direction of the outer housing 10.
  • the lever 30 holds the inner part 16 in the position shown. If a clockwise torque of FIG. 1 is exerted on the outer housing 10, then the reaction torque of the screw acts on the inner part 16 to produce a torque around the bearing journal 18, which the inner part 16 relative to the Outer part 10 tries to pivot counterclockwise of Fig.1. This is counteracted by the torque exerted by the spring 38 via the toggle lever mechanism 48 with the lever 30.
  • 50 denotes an outer housing.
  • the outer housing 50 is formed by a profile tube with a rectangular cross section.
  • a handle part 52 also consists of a profile tube of rectangular cross section.
  • the grip part is designed as a component separate from the outer housing.
  • An inner part 54 is also designed as a profile tube with a rectangular cross section. This inner part 54 is firmly connected to the handle part 52.
  • the outer housing 50 is pivotably mounted on the inner part 54 by means of a bearing pin 56.
  • a tool 58 is inserted into the left end of the outer housing 50 in FIG.
  • the right end of the outer housing 50 in FIG. 2 is oblique cut off.
  • the lower wall of the outer housing 50 in FIG. 2 projects over the upper wall in FIG.
  • the handle part 52 is cut obliquely at its left end in FIG. 2.
  • the upper wall in FIG. 2 projects over the lower wall in FIG. 2.
  • a narrow, obliquely extending gap 60 is thereby formed between the outer housing 50 and the grip part 52, which permits a relative movement of the parts.
  • a two-armed lever 62 is mounted on a bearing journal 64 in the side walls of the grip part 52, which project obliquely with respect to the lower wall.
  • the lever 62 rests with its tool-side end in FIG. 2 left on the projecting wall 66 on the right end of the outer housing 50.
  • the other end of the lever 62 is connected to a slider 70 via a link 68.
  • the slider 70 is slidably guided in the handle part 52.
  • a biased spring 72 abuts the slider.
  • the spring 72 is supported on a nut 74.
  • the nut 74 has a rectangular cross section and is non-rotatably but displaceably guided in the handle part 52.
  • the nut 74 is guided on a threaded adjusting spindle 76.
  • the adjusting spindle is rotatably but axially immovable in an end piece 78 of the grip part 52.
  • At the end of the adjusting spindle there is an adjusting button 80.
  • the upper part 84 of the wall of the handle part 52 projecting to the left in FIG. 2 is firmly connected to the inner part 54.
  • the mean force application point at which the user engages the handle part 52 is designated 86 in FIG.
  • the torque wrench described works as follows: In normal operation, the outer housing 50 is held in its illustrated position relative to the inner part by the lever 62 against the action of the torque applied via the tool 58. The upper wall of the outer housing in FIG. 2 bears against the upper wall of the inner part 54 in FIG. When a certain torque is exceeded, the lever 62 of the toggle mechanism 82 dodges and presses the slider 70 to the right in FIG. 2 via the link 68. The more the “knee" formed by the lever 62 and the link 68 is stretched, the greater the force component falling in the longitudinal direction of the torque wrench. After the lever 62 has dodged, the mechanical resistance of the toggle mechanism breaks down. The grip part 52 is suddenly pivoted against the outer housing 50 in a clockwise direction. This is heard and felt by the user.
  • FIG. 2 also allows the contact point between the part carrying the tool, namely here the outer housing, and the toggle mechanism to be shifted to the right in FIG. 2. With this, the force becomes smaller and the toggle mechanism can be made smaller.
  • the extension of the "function lever" does not lead to an increase in weight since the outer housing 50 which is present anyway is used for this.
  • the inner part can be designed as a relatively light profile tube.
  • FIG. 3 shows a design of the torque wrench. Corresponding parts are given the same reference numerals in FIG. 3 as in FIG. 2.
  • the inner part 54 is fastened to the handle part 52 by two screws 88 and 90.
  • the screws 88 and 90 are screwed into a nut block 92 on the inside of the inner part 54.
  • the slider 70 is a sheet metal part, which is bent in a U-shape and is guided in the handle part 52.
  • the two sides of the U-shaped sheet metal part spring back in the longitudinal direction, so that edges 94 are formed.
  • a thrust washer 96 rests on these edges 94.
  • the spring 72 bears against the thrust washer 96.
  • the spring 72 is biased and supported on the nut 74.
  • the adjusting spindle 76 has a hexagonal profile.
  • the adjusting spindle 76 is guided in a bore 98 of a cross bolt 100 so as to be longitudinally displaceable.
  • the adjusting spindle 76 has a circumferential groove 102, in which a spring-loaded locking ball engaging in the transverse bolt engages.
  • the adjusting spindle 76 is thus held in the axial position shown.
  • the adjusting spindle 76 can, however, be pulled out axially to the right in FIG. 3 by overcoming the locking spring loading the locking ball.
  • a threaded bushing 104 provided with an external thread is seated on the adjusting spindle 76.
  • an end piece 106 provided with an internal hexagon.
  • the end piece 106 is firmly connected to the threaded bushing 104 and guided on the adjusting spindle 76.
  • the nut 74 is guided, which in turn is guided non-rotatably in the handle part.
  • the end piece 106 rests on the cross bolt 100. As a result, the axial position of the threaded bushing 104 is fixed.
  • a stop body 108 is attached to the left end of the adjusting spindle in FIG. 3, which limits the movement of the adjusting spindle 76 to the right in FIG. 3 in that the stop body 108 comes to rest on the end face of the threaded bush 104.
  • An adjusting button 110 is seated on the right end of the adjusting spindle 76, which protrudes from the grip part 52.
  • the adjusting spindle can be used to adjust the torque at which the torque wrench should respond 76 are pulled out with the adjusting knob to the right in Fig. 3. The handling of the adjusting knob 110 is thereby facilitated.
  • a scale carrier 112 is connected to the nut 74 and carries a scale.
  • the scale can be read through an opening 114 in the handle line 52.
  • a handle 116 sits on the handle part 52.
  • the handle 116 has openings 118, 120 for the screws 88 and 90.
  • the heads of the screws 88.90 are located in the openings 118, 120.
  • the handle 116 is thereby secured in the longitudinal direction.
  • the handle also has an opening 122 which is aligned with the opening 114 of the handle part 52.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
  • Manufacture Of Motors, Generators (AREA)
EP89100363A 1988-03-11 1989-01-11 Drehmomentschlüssel Expired - Lifetime EP0331868B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89100363T ATE104196T1 (de) 1988-03-11 1989-01-11 Drehmomentschluessel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3808120A DE3808120A1 (de) 1988-03-11 1988-03-11 Drehmomentschluessel
DE3808120 1988-03-11

Publications (3)

Publication Number Publication Date
EP0331868A2 EP0331868A2 (de) 1989-09-13
EP0331868A3 EP0331868A3 (en) 1990-10-10
EP0331868B1 true EP0331868B1 (de) 1994-04-13

Family

ID=6349473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89100363A Expired - Lifetime EP0331868B1 (de) 1988-03-11 1989-01-11 Drehmomentschlüssel

Country Status (9)

Country Link
US (1) US4898068A (enrdf_load_stackoverflow)
EP (1) EP0331868B1 (enrdf_load_stackoverflow)
JP (1) JP2755662B2 (enrdf_load_stackoverflow)
KR (1) KR0133674B1 (enrdf_load_stackoverflow)
CN (1) CN1014781B (enrdf_load_stackoverflow)
AT (1) ATE104196T1 (enrdf_load_stackoverflow)
DE (2) DE3808120A1 (enrdf_load_stackoverflow)
ES (1) ES2051895T3 (enrdf_load_stackoverflow)
IN (1) IN170819B (enrdf_load_stackoverflow)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE470448B (sv) * 1992-08-25 1994-04-11 Sandvik Ab Verktyg med momentindikering
CN1070081C (zh) * 1998-04-15 2001-08-29 韩来增 碳素光在疾病治疗上的应用及碳素光照射治疗保健仪
US6722235B2 (en) * 2002-02-25 2004-04-20 Chih-Ching Hsieh Torque wrench with a scale
CN1735483A (zh) * 2002-11-12 2006-02-15 诚实公司 可脱开式扭矩扳手
US7182006B1 (en) * 2006-08-16 2007-02-27 Matatakitoyo Tool Co., Ltd. Torque-controlling wrench
US8033201B2 (en) * 2007-08-10 2011-10-11 Brain James Cutler Signaling torque driver and method
TWI399266B (zh) * 2011-01-27 2013-06-21 Ting Ko Tsai Torque wrench structure
TWI396608B (zh) * 2011-06-03 2013-05-21 Kabo Tool Co 電子式扭力螺絲起子
DE102012100970B4 (de) * 2012-02-07 2014-01-09 MAQUET GmbH Vorrichtung zum manuellen Entriegeln eines mit einer Last beaufschlagbaren Haltemechanismus
TWI537106B (zh) * 2013-05-20 2016-06-11 Kabo Tool Co Torque wrenches for torque correction and their torque correction methods
US20160236340A1 (en) * 2015-02-17 2016-08-18 Snap-On Incorporated Remote Wrench Handle and Accessories
DE102017009074B4 (de) * 2017-09-28 2020-11-19 Deutz Ag Drehzahlregler einer Brennkraftmaschine
DE102018100665A1 (de) * 2018-01-12 2019-07-18 STAHLWILLE Eduard Wille GmbH & Co. KG Auslösemechanismus für ein Drehmomentwerkzeug
DE102018100664A1 (de) 2018-01-12 2019-07-18 STAHLWILLE Eduard Wille GmbH & Co. KG Drehmomentwerkzeug
CN109931846A (zh) * 2019-04-10 2019-06-25 江西江铃集团新能源汽车有限公司 汽车悬挂高度检测仪及汽车车轮阻尼力矩检测仪
CN112792775A (zh) * 2021-01-27 2021-05-14 杭州倍力耐工具有限公司 一种扭矩扳手
CN112917426B (zh) * 2021-01-27 2022-09-06 芜湖协航测控技术有限公司 一种数显扭矩扳手的电子限力方法
DE102021109191B4 (de) 2021-04-13 2024-04-11 Wiha Werkzeuge Gmbh Schraubwerkzeug mit mechanisch verstellbarer Drehmomentanzeige sowie zugehöriges Verfahren
CN113324698B (zh) * 2021-05-27 2022-04-29 河北省计量监督检测研究院廊坊分院 便携式扭矩扳手在线检测装置
WO2025091449A1 (en) * 2023-11-03 2025-05-08 Apex Brands, Inc. Mechanical torque wrench

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Publication number Priority date Publication date Assignee Title
DE679042C (de) * 1936-12-08 1939-07-27 Werke Kiel Akt Ges Deutsche Schraubenschluessel mit begrenzter Kraftwirkung
GB732013A (en) * 1953-01-19 1955-06-15 Frank Wendell Livermont Torque limiting wrench
US3202021A (en) * 1962-02-23 1965-08-24 Reed Roller Bit Co Torque release wrench
GB966947A (en) * 1962-07-04 1964-08-19 Merritt & Company Engineering Improvements in torque spanners
US3357284A (en) * 1966-04-05 1967-12-12 William E Van Hoose Torque wrench
US3581606A (en) * 1969-05-23 1971-06-01 Bosco Grabovac Torque wrench
GB1366309A (en) * 1971-11-02 1974-09-11 Robinson T Torque wrenches
FR2230465A1 (en) * 1973-05-22 1974-12-20 Moulinoux Andre Torque wrench emitting noise at desired torque - lever striking arm is connected by leaf spring carried by arm
DE2535236B2 (de) * 1975-08-07 1980-08-07 Alois 7130 Muehlacker Hohenschlaeger Belastbarer Rasenplatz, insbesondere für Sportzwecke
SU781044A1 (ru) * 1979-01-04 1980-11-23 Краснодарский Филиал Всесоюзного Научно-Исследовательского Института По Монтажным И Специальным Строительным Работам "Монтажспецстрой" Устройство дл зат жки резьбовых соединений
DE3413761A1 (de) * 1984-04-12 1985-10-24 Hazet-Werk Hermann Zerver Gmbh & Co Kg, 5630 Remscheid Steckschluessel, insbesondere radmutternschluessel fuer kraftfahrzeuge
US4655104A (en) * 1986-01-06 1987-04-07 Ryeson Corporation Adjustable torque wrench

Also Published As

Publication number Publication date
JP2755662B2 (ja) 1998-05-20
CN1014781B (zh) 1991-11-20
EP0331868A2 (de) 1989-09-13
EP0331868A3 (en) 1990-10-10
IN170819B (enrdf_load_stackoverflow) 1992-05-23
DE3808120A1 (de) 1989-09-28
KR0133674B1 (ko) 1999-05-01
CN1036162A (zh) 1989-10-11
US4898068A (en) 1990-02-06
ATE104196T1 (de) 1994-04-15
ES2051895T3 (es) 1994-07-01
DE58907423D1 (de) 1994-05-19
KR890014214A (ko) 1989-10-23
JPH01271180A (ja) 1989-10-30

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