EP1502708B1 - Clé dynamométrique - Google Patents

Clé dynamométrique Download PDF

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Publication number
EP1502708B1
EP1502708B1 EP04008410A EP04008410A EP1502708B1 EP 1502708 B1 EP1502708 B1 EP 1502708B1 EP 04008410 A EP04008410 A EP 04008410A EP 04008410 A EP04008410 A EP 04008410A EP 1502708 B1 EP1502708 B1 EP 1502708B1
Authority
EP
European Patent Office
Prior art keywords
torque
torque wrench
digit
tube
handle
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
EP04008410A
Other languages
German (de)
English (en)
Other versions
EP1502708A1 (fr
Inventor
Hermann J. Zerver
Thomas Beyert
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.)
Hazet Werk Hermann Zerver GmbH and Co KG
Original Assignee
Hazet Werk Hermann Zerver 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 Hazet Werk Hermann Zerver GmbH and Co KG filed Critical Hazet Werk Hermann Zerver GmbH and Co KG
Publication of EP1502708A1 publication Critical patent/EP1502708A1/fr
Application granted granted Critical
Publication of EP1502708B1 publication Critical patent/EP1502708B1/fr
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
    • 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 torque wrench according to the preamble of patent claim 1, from the document EP 1 317 997 is known.
  • Torque wrenches are used in a wide variety of practical applications wherever screws with a defined torque and set preload must be tightened.
  • the desired torque is adjusted by turning a compression spring in which the handle connected to a threaded spindle is rotated relative to the housing of the torque wrench.
  • the housing is usually formed by a circular diameter in the lever tube which carries a tool head, such as a ratchet at the front end, and the handle at the rear end.
  • the handle In order to secure the respectively set torque when using the torque wrench against adjustment, the handle is in the Use position set on the lever tube.
  • the set torque can be read on a display.
  • the display Predominantly the display is executed with the currently usual torque wrenches as a scale or vernier scale.
  • the invention is based on the object of the prior art to provide a torque wrench with an improved display of the set torque.
  • the crux of the invention is the measure that the display comprises a Zählrollentownwerk. In this way, a mechanical-digital display is created.
  • the numeric counter works reliably and accurately. A separate power supply for the display is not required.
  • the numerical counter is set to a specific base or starting value, for example 20 Nm. From this position, the adjustment can be made to higher values and back.
  • the philosophicalrollensorgetician has at least two number wheels, which are linked via a transmission. In practice, predominantly three numbered rollers will be used, through which the one, ten and hundred values of the torque will be displayed. For smaller torque ranges, tenths, ones and tens can also be displayed on corresponding numbered wheels.
  • the number wheels are linked via a gear with two gears so that with a full rotation of the one-digit role, the tens-digit role by an equally large angular step and a full turn of the tens digit roll the Hundert-digit role also by an equal angular increment to be moved.
  • the respective angular step corresponds to one-tenth of a full revolution.
  • the numerical counter is connected via a rotatable spindle tube with the handle, so that the rotational movement of the handle is transmitted to the beneficiarollenminutetechnik.
  • a number role, and conveniently the one-digit role and the spindle tube is connected via a sleeve.
  • the sleeve has at least one longitudinal slot in which a driver provided on the spindle tube slidably engages.
  • the numerical counter and the associated gear are arranged protected in a robust housing with viewing window, which surrounds the lever tube.
  • the spindle tube is axially displaceable relative to the housing.
  • the number wheels of the Zählrollen warmthwerks are preferably mounted on the lever tube. This measure ensures a reliable and störunan juxtaposen operation of the Zählrollen warmthwerks.
  • the number-roll counter can also be connected via a rotatable spindle tube to the spindle for adjusting the compression spring of the torque wrench.
  • the viewing window for displaying the set values can be equipped with an alternating field via which a change of the torque units is possible.
  • the torque wrench 1 has a lever tube 2 with a handle 3 and a tool head 4 and a display 5 for a set torque.
  • the tool head 4 is executed in the illustrated embodiment as Umschaltknarre 6 with a square pin 7. In principle, however, different tool heads can be used, for example, ring, mouth or Allen socket.
  • a connecting shaft 8 extends into the front longitudinal section 9 of the lever tube 2, which is flattened on its upper and lower sides in this area.
  • Two embedded in the connecting shaft 8 balls 10 form a guide for the connecting shaft 8 in the longitudinal section.
  • the connecting shaft 8 is pivotally mounted via a pin 11 at the end 12 of the flattened length portion 9 in the lever tube 2 and is supported at its end 13 on a so-called tilting cube 14.
  • a tensionable compression spring 16 is incorporated in the form of a helical compression spring.
  • the compression spring 16 is supported with its end facing the tool head 4 via a pressure piece 17 against the tilting cube 14.
  • the tilting cube 14 is located in receptacles 18 and 19 at the end 13 of the connecting shaft 8 and in the pressure piece 17 and connecting them in a row force fit rotatably to reach a certain torque. If the set over the spring tension of the compression spring 16 torque exceeded, the tool head 4 rotates relative to the tilting cube 14 and the torque wrench 1 triggers.
  • an unspecified electrical signal generator 20 is addressed, so that the triggering of the torque wrench 1 is displayed.
  • the other end of the compression spring 16 is located on a pot-shaped in the lever tube 2 cup-shaped sleeve 21.
  • the jacket of the sleeve 21 is in sliding contact with the inner surface of the lever tube. 2
  • the sleeve 21 summarizes an end-side print head 22 of a threaded spindle 23.
  • the threaded spindle 23 is supported in a spindle nut 24 which is fixed in the end 15 of the lever tube 2 by means of pins 25.
  • a driving body 27 At the profiled end 26 of the threaded spindle 23, this is held in a driving body 27 and rotatably locked via a nut 28 with the driving body 27.
  • the driving body 27 has radially projecting driver 27 ', which protrude in axially extending grooves 3a, 3b of the handle 3, so that the driving body 27 is rotatably connected to the handle 3.
  • a spindle nut 29 On the threaded spindle 23, a spindle nut 29 is displaceable, which is connected via a pin 30 with a spindle tube 31.
  • the handle 3 serves both as an ergonomically designed handle for introducing force and for torque adjustment.
  • the respective release torque is adjusted by adjusting the compression spring 16 by the handle 3 is rotated relative to the lever tube 2 of the torque wrench 1.
  • FIGS. 1 to 3 shown position shows the position of use of the torque wrench 1. That means, the handle 3 can not be rotated in this position. Consequently, no torque adjustment can be performed.
  • a locking piece 33 is rotatably incorporated. This has on its lying in the handle 3 end face 35 pin 36. On a coronary shoulder 37 of the locking piece 33, a compression spring 38 is supported, which abuts on its other side on the driving body 27.
  • the pins 36 prevent in the locking position of the locking piece 33, the displacement of the handle 3 in the direction of arrow P, since they are located above the filled stop area of the driving body 27.
  • the balls 43 are clamped by the clamping portion 45 of the locking sleeve 41 against the lever tube 2, so that a rotation of the handle 3 relative to the lever tube 2 is not possible.
  • the locking sleeve 41 is moved forward as mentioned.
  • the balls 43 enter the freewheeling section 46, so that a rotational movement of the handle 3rd and thus a torque adjustment by adjusting the tension of the compression spring 16 via the threaded spindle 23 is possible.
  • the handle 3 is connected to a legislativerollenexcellenttechnik 47 of the display 5.
  • the cuisinerollenexcellenttechnik 47 includes three digit rollers 48, 49, 50 which are mounted on the lever tube 2 and linked via a gear 51.
  • the number wheel 48 displays the unit values of the three-digit display 5. On the number wheel 49 are the tens and on the number wheel 50 are the hundreds of values of a set torque read.
  • the Zählrollenentownwerk 47 is arranged in a robust housing 52 which surrounds the lever tube 2 and has a viewing window 53 for reading the triggering torque. As based on the FIG. 1 to recognize the trigger torque is set to 158 Nm in the embodiment shown here.
  • the spindle tube 31 is axially displaceable relative to the housing 52, wherein the spindle tube 31 is connected via a sleeve 54 with the number roller 48.
  • longitudinal slots 55 are provided, into which the spindle tube 31 located on the carrier 56 slidably engage.
  • the spindle tube 31 is rotated and moved in the image plane to the left. In this case, it pushes into the sleeve 54.
  • the driver 56 the sleeve 54 and thus simultaneously the number role 48 is rotated.
  • the drivers 56 of the spindle tube 31 slide forward.
  • the gear 51 has two gears 57, 58 which are mounted on a shaft 59 in the housing 52.
  • the number wheels 48, 49, 50 are through the gears 57, 58 of the transmission 51 so linked that at a full revolution of the number role 48, the number role 49 by an angular step which corresponds to one-tenth of the rotation, that is rotated by a tens value. Accordingly, one full revolution of the number roller 49, the number roller 50 is rotated by an angle step corresponding to one-tenth of the revolution to display the next hundred value.
  • For this sequence of steps are on the numbered rollers 48-50 on the gear geometry tuned recesses 60 and cam 61 is provided, which cooperate with the gears 57, 58 and cause a corresponding adjustment of the Zählrollenexcellentwerks 47.
  • the "Nm" indicator for changing the torque units can be factory-changed by changing the viewing window 53 to another unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Claims (9)

  1. Clé dynamométrique, qui comprend un levier tubulaire (2) avec une poignée (3), une tête d'outil (4) et un afficheur (5) pour un couple de rotation qui a été réglé, caractérisée en ce que l'afficheur (5) comprend un compteur numérique à rouleau (47).
  2. Clé dynamométrique selon la revendication 1, caractérisée en ce que le compteur numérique à rouleau (47) comprend au moins deux rouleaux numériques (48, 49, 50) qui sont raccordés par un engrenage (51).
  3. Clé dynamométrique selon la revendication 1 ou la revendication 2, caractérisée en ce que le compteur numérique à rouleau (47) est raccordé par l'intermédiaire d'une broche tubulaire rotative (31) à la poignée (3).
  4. Clé dynamométrique selon La revendication 3, caractérisée en ce qu'un rouleau numérique (48) et la broche tubulaire (31) sont raccordés par une douille (54).
  5. Clé dynamométrique selon la revendication 4, caractérisée en ce que la douille (54) présente au moins une fente longitudinale (55), dans laquelle un toc d'entraînement (56) prévu sur la broche tubulaire (31) s'engage de façon déplaçable.
  6. Clé dynamométrique selon l'une des revendications 3 à 5, caractérisée en ce que le compteur numérique à rouleau (47) est disposé dans un logement (52) qui enserre le levier tubulaire (2), de telle sorte que la broche tubulaire (31) peut se déplacer axialement par rapport au logement (52).
  7. Clé dynamométrique selon l'une des revendications 1 à 6, caractérisée en ce que les rouleaux numériques (48, 49, 50) du compteur à rouleau numérique (47) sont logés sur le levier tubulaire (2).
  8. Clé dynamométrique selon l'une des revendications 1 à 7, caractérisée en ce que le compteur numérique à rouleau (47) est raccordé à la broche (23) au moyen d'une broche tubulaire rotative (31).
  9. Clé dynamométrique selon l'une des revendications 1 à 8, caractérisée en ce que la fenêtre de visualisation (53) est dotée d'une plage de variation (53') destiné à modifier les unités de couple de rotation.
EP04008410A 2003-07-31 2004-04-07 Clé dynamométrique Expired - Lifetime EP1502708B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20311811U 2003-07-31
DE20311811U DE20311811U1 (de) 2003-07-31 2003-07-31 Drehmomentschlüssel

Publications (2)

Publication Number Publication Date
EP1502708A1 EP1502708A1 (fr) 2005-02-02
EP1502708B1 true EP1502708B1 (fr) 2008-06-25

Family

ID=28685685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04008410A Expired - Lifetime EP1502708B1 (fr) 2003-07-31 2004-04-07 Clé dynamométrique

Country Status (4)

Country Link
EP (1) EP1502708B1 (fr)
AT (1) ATE399078T1 (fr)
DE (2) DE20311811U1 (fr)
ES (1) ES2308060T3 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2891176B1 (fr) * 2005-09-23 2009-04-03 Facom Sa Cle dynamometrique.
CN100509296C (zh) * 2005-12-02 2009-07-08 谢智庆 双支点扭力扳手
CN100575001C (zh) * 2007-07-05 2009-12-30 陈章英 扭力起子结构
DE202010003273U1 (de) * 2010-03-05 2010-06-02 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentwerkzeug
DE202011050282U1 (de) * 2011-05-30 2011-07-11 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentwerkzeug
DE202011050888U1 (de) * 2011-08-03 2011-09-08 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentwerkzeug
DE202011050887U1 (de) * 2011-08-03 2011-09-07 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentwerkzeug
CN106175907B (zh) * 2016-08-31 2020-10-20 天津正天医疗器械有限公司 计数型扭力手柄
DE202022100447U1 (de) * 2022-01-26 2023-04-27 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmoment-Schraubendreher

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4324888C3 (de) * 1993-07-26 2000-07-27 Frank Hohmann Lastwechselzähler
US6463811B1 (en) * 1999-04-28 2002-10-15 Snap-On Tools Company Bending beam torque wrench
DE20119801U1 (de) * 2001-12-06 2002-02-14 Hazet-Werk Hermann Zerver GmbH & Co. KG, 42857 Remscheid Schaft für einen Drehmomentschlüssel

Also Published As

Publication number Publication date
ES2308060T3 (es) 2008-12-01
ATE399078T1 (de) 2008-07-15
EP1502708A1 (fr) 2005-02-02
DE502004007424D1 (de) 2008-08-07
DE20311811U1 (de) 2003-09-25

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