EP2774724A1 - Outil à couple avec mécanisme de déclenchement - Google Patents

Outil à couple avec mécanisme de déclenchement Download PDF

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Publication number
EP2774724A1
EP2774724A1 EP14000266.8A EP14000266A EP2774724A1 EP 2774724 A1 EP2774724 A1 EP 2774724A1 EP 14000266 A EP14000266 A EP 14000266A EP 2774724 A1 EP2774724 A1 EP 2774724A1
Authority
EP
European Patent Office
Prior art keywords
torque
lever
switching edge
release
torque tool
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.)
Granted
Application number
EP14000266.8A
Other languages
German (de)
English (en)
Other versions
EP2774724B1 (fr
Inventor
Joachim Wilhelm
Marco Theissen
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
Publication of EP2774724A1 publication Critical patent/EP2774724A1/fr
Application granted granted Critical
Publication of EP2774724B1 publication Critical patent/EP2774724B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 screw connection is the most commonly used connection in mechanical engineering.
  • suitable assembly tools include torque tools, as mentioned above.
  • Torque tools are needed to apply a specific torque to a workpiece.
  • Torque tools such as torque wrench or torque screwdrivers are known.
  • triggering torque tools a setpoint torque is set. Once this torque is achieved when tightening a screw, the torque tool signals the achievement of the desired torque to a user. This can be signaled, for example, by an audible click or a noticeable click through power interruption.
  • Torque tools are used to load a bolt with a high preload force that is within the elastic range of the bolt or also to load the bolt with only slight preload forces.
  • new construction materials such as magnesium, aluminum or plastic, especially for lightweight construction in the automotive or aircraft industry can increase both the demand, as well as the requirements of the torque tools. These new materials increase the number of sensitive screw connections. The lower tensile strength of these lightweight materials compared to steel materials, would lead to damage the thread in an overuse of the screw, which would make these expensive components unusable.
  • the DE 3933913 A1 relates to a torque wrench, with a key body, a key shank and a transmission element, wherein a torque from the key body to the key shaft by means of the transmission element is transferable and the transmission element is movable at a defined load exceeding force from a transmission position to an overload position, in which a Relative movement between the key body and the key shank is enabled.
  • a torque wrench is known, wherein designed as a rotary handle key body is associated with a ball bearing, relative to the key body radially movable key shank.
  • the DE 102004043217 A1 discloses a torque wrench with a handle and a tool holder and a display device for representing the reaching or exceeding of a preset torque, wherein the display device is composed of light-emitting elements, such as light-emitting diodes having a specific light indicator.
  • the display device consists of a plurality of band or line-like arranged lighting elements and that the light display of a certain, often repetitive light pattern consists, which is achieved by a passage of the light elements.
  • a torque tool for measuring and / or triggering torque on a workpiece.
  • the torque tool includes a housing with a handle and a rod for transmitting the torque.
  • a measuring element is used for the electronic detection of the torque, which is processed by a measuring and control electronics torque.
  • a trigger switch controlled by the electronic measuring and control electronics triggers the torque tool at a setpoint.
  • the torque wrench described therein has a reduction mechanism which has at least one actuator actuated by the release switch. In this case, the reduction mechanism between the rod for transmitting the torque and the electronically controlled release switch for triggering the torque tool is arranged.
  • the reduction mechanism includes a shift lever with a shift edge controlled by the electronically controlled release switch.
  • the object of the invention is therefore to avoid in particular the disadvantages of the prior art and to create a triggering torque wrench, no longer need to be time consuming measured in the production, sorted and mounted in a particular constellation. It is another object of the invention to provide a user-friendly torque tool.
  • the distance to the other bearing pin can be varied by being simply rotated for adjustment. After adjustment, the position of the bearing pin is fixed. Thus, the pivotally mounted on the bearing pin trigger lever is moved accordingly, so that the overlap of the switching edge can be adjusted to the attacking switching edge of the other trigger lever.
  • the switching edge can in principle also be formed by a tilting cube or a toggle lever, which trigger the torque tool via its edge.
  • the position of the release levers can be optimized with their switching edge The advantage that results from the adjustability is that the release levers no longer need to be processed so precisely. This saves time and money in the production. Likewise, there is no sorting according to certain criteria in order to select the right and matching release levers. Because the release lever can be readjusted if necessary.
  • two bearing pins for adjusting the distance are mounted eccentrically. This measure serves to ensure that each bearing pin can be adjusted with a release lever via the eccentric bearing. As a result, the distances between the bearing bolts can be realized larger or smaller than would be possible with a single eccentric bearing of a bearing pin.
  • an eccentric bearing of a bearing pin for coarse adjustment and an eccentric bearing of a bearing pin is designed for fine adjustment.
  • the axes of the eccentric are at different radii of the bearing bolts. This ensures that the one bearing pin whose axis is on the smaller radius, used for fine adjustment and the other bearing pin whose axis is on the larger radius, used for coarse adjustment. This allows the measuring tool to be adjusted particularly well and precisely.
  • an adjustment mechanism for adjusting the triggering torque is provided.
  • the adjustment mechanism serves to carry out the respectively required setpoint torque on the torque tool.
  • the torque tool then triggers at this set target torque.
  • the adjustment mechanism thus causes the torque tool not only triggers at a fixed torque, but can be set variably.
  • a locking mechanism for fixing the set release torque is provided on the adjustment mechanism. So that a set target torque for the release can not be adjusted, the locking mechanism is provided for this purpose.
  • the locking mechanism blocks the accidental adjustment of the set target torque.
  • the locking can be realized for example with a fixing screw, which permanently detects the adjustment mechanism in a set position until the fixing screw is released again. Then, by means of adjustment mechanism, a new setpoint torque can be set at which the torque tool is to trigger.
  • the locking mechanism is spring-loaded. This has the advantage that the locking mechanism is biased.
  • the locking mechanism triggers, for example, by being actuated against the spring force by actuation of a pin or a push button or lever. This happens faster than e.g. with a screw, which must first pass through a thread pitch until it either releases or locks the locking mechanism, as the case may be.
  • the locking mechanism has a latching mechanism.
  • a pin or lever engages in the locking mechanism. Accordingly, to release the pin or the lever is removed again from the locking mechanism.
  • the locking mechanism may include a bore or other profile recesses, in which engage the pin or the lever or a ball spring loaded.
  • a further preferred embodiment of the invention is that the adjusting mechanism of the torque tool has a slide which is guided in a slot gate.
  • the slider is preferably mounted externally on the lever housing so that it can be conveniently operated by a user to set the desired torque.
  • the slider may have a mark, which points to a scale.
  • the scale displays torque values. Depending on where the slider is, the marker points to a different torque.
  • the locking mechanism By means of the locking mechanism, the slider can be found in the slot gate.
  • Fig. 1 is designated 10 an inventive triggering torque tool. It is a torque wrench 10, which is shown in a schematic schematic diagram in longitudinal section.
  • the torque wrench 10 includes a shaft-like lever housing 12 having a handle portion 14 and a head portion 16 for transmitting torque to a workpiece.
  • This head portion 16 usually consists of a drive head 17, which can accommodate for coupling with a workpiece, such as a screw, a plug-in or Aufstecktechnikmaschine.
  • the drive head 17 may include a ratchet mechanism to facilitate tightening a screw to the desired torque for a user.
  • a lever assembly 18 is further arranged for transmitting the torque to the drive head 17.
  • levers 20 are pivotally mounted via bearing pins 22 in the lever housing 12 in a mounting frame 23.
  • the bearing pins 22 are arranged substantially parallel and provided transversely to the longitudinal axis of the lever housing 12.
  • a trigger mechanism 24 is used to trigger the torque wrench 10.
  • the trigger mechanism 24 includes two trigger levers 26, 28, which are also part of the lever assembly 18. Release lever 26, 28 each have a switching edge 30, 32, over which the torque wrench 10 triggers.
  • Fig. 2a shows in a longitudinal section the area of the torque wrench 10 where the triggering mechanism 24 is arranged.
  • the release levers 26, 28 are pivotally mounted in the lever housing 12 each about their bearing pin 22.
  • the switching edges 30, 32 of the release lever 26, 28 are clearly visible.
  • the trigger lever 28 consists of two components, namely switching edge lever 34 and lever 36.
  • the switching edge lever 34 is pivotally mounted on the adjusting lever 36 via a bearing pin 38.
  • the switching edge 32 is provided on a front side of the switching edge lever 34.
  • the release lever 28 is biased by a bow spring 40.
  • the adjusting lever 36 is pivotally mounted in the lever housing via an eccentrically mounted bearing pin 42. In this case, the bearing pin 42 with Snap rings 44 fixed.
  • the trigger lever 26 has the switching edge 30.
  • the switching edge 30 of the release lever 26 is in contact with the switching edge 32 of the release lever 28.
  • the release lever 26 is pivotally mounted about the bearing pin 46.
  • the adjusting lever 36 is changed in its position.
  • the distance between the bearing pin 42 and the bearing pin 46 can be varied.
  • the overlapping contact surfaces of the switching edges 30, 32 can thus be adjusted in the switching edge region 48 of the triggering mechanism in a suitable manner.
  • Further levers or reduction lever 20 for torque transmission are indicated in the illustration. These levers are also pivotally mounted with bearing pin 22 in the lever housing 12.
  • Fig. 2b therefore shows the switching edge region 48 of the triggering mechanism 24 in an enlargement.
  • this switching edge region 48 overlap the switching edges 30, 32.
  • the overlap region 50 of both switching edges 30, 32 is formed via the eccentrically mounted lever 36 adjustable.
  • the switching edge lever 34 is pivotally mounted on the adjusting lever 36 via the bearing pin 38.
  • the bow spring 40 holds the construction of the trigger mechanism 24 under sufficient tension.
  • Fig. 3 shows a section of the torque wrench 10 according to the invention in the region of the trigger mechanism 24.
  • the bearing pin 42 is mounted eccentrically.
  • a gear 51 designed as a toothing which is arranged on the bearing pin 42, a latching mechanism 52 is formed.
  • the locking mechanism 52 serves to fix the eccentrically mounted bearing pin 42 in a set position. As a result, the distance between the two bearing pins 42 and 46 can be varied.
  • the end of the one trigger lever 26 and the release lever 28 can also be seen.
  • Fig. 4 shows the detail of the torque wrench 10 according to the invention in the region of the trigger mechanism 24 according to FIG. 2 in a section AA according to the FIG. 3 ,
  • the bearing pin 42 is mounted eccentrically in the housing 12.
  • the bearing pin 42 is secured to the snap ring 44.
  • About réellemitlander 53 of the gear 51, the locking mechanism 52 is actuated for adjusting the bearing pin 42.
  • the position of the release lever 28 can be moved.
  • the switching edge 32 of the switching edge lever 34 relative to the switching edge 30 of the trigger lever 26 is moved accordingly.
  • the overlap of the switching edge 30 with the switching edge 32 takes place in the switching edge region 48.
  • the switching edge lever 34 is pivotally mounted on the adjusting lever 36 by means of the bearing pin 38.
  • the switching edge lever 34 forms with the adjusting lever 36, the release lever 28th
  • Fig. 5 schematically shows a section of an eccentrically mounted bearing pin 42.
  • the gear 51 of the latching mechanism 52 is fixed to the bearing pin 42.
  • a recess 54 is provided, which corresponds to the contours 56 of the gear 51.
  • the bearing pin 42 is arranged eccentrically in the gear 51.
  • the gear 51 is fixed in the contour 56 by the latching mechanism 52.
  • the bearing pin 42 and the gear 51 can not rotate in this position. By slight axial displacement of the gear 51, the bearing pin 42 can rotate with the gear 51, since it is no longer in the toothing.
  • the gear 51 is namely then outside the contour 56 of the latching mechanism 52 in the lever housing 12th
  • the release lever 28 is pivotally mounted on the eccentrically mounted bearing pin 42. By turning the bearing pin 42, the release lever 28 can be moved in its position. But this also allows the switching edge region 48 to be adjusted at the same time with the switching edges 30, 32 (cf. Fig. 2a or 2b).
  • the bearing pin 42 is further fixed with the appropriate snap ring 44 in its bearing of the lever housing 12. In this figure, further levers 20 of the lever assembly 18 of the torque wrench 10 can be seen.
  • Fig. 6 shows in a schematic schematic diagram of the bearing pin 42 for the torque wrench 10 according to the invention.
  • the gear 51 of the locking mechanism 52 At one end face of the cylindrical bearing pin 42 is the gear 51 of the locking mechanism 52.
  • a disc-like bearing support 58 is provided at the other end of the bearing pin 42.
  • the axis 60 of the bearing pin 42 is arranged eccentrically with respect to the disc-like bearing holder 58 and the gear 51.
  • the bearing pin 42 moves eccentrically. This also moves the trigger lever 28 (see Fig. 2a ) corresponding to which is mounted pivotably about such a bearing pin 42.
  • Fig. 7 schematically shows the torque wrench 10 according to the invention without the lever housing 12 in a plan view with an adjustment mechanism 62.
  • the adjustment mechanism 62 has a slider 64 on.
  • the slider 64 is displaced in a slot slot 66 for setting a target torque.
  • a support 71 acts via a guide 69 on a bending rod 70.
  • the bending rod 70 is guided in the support 71.
  • the flexure rod 70 is coupled to the triggering mechanism 24 via the lever assembly 18.
  • the support 71 is actuated via the slider 64.
  • a scale 68 is provided with torque values (see Figure 8 ).
  • the slider 64 is moved in the slot gate 66 until a mark on the desired target torque of the scale 68 shows, ie at the torque at which the torque wrench finally trigger.
  • a locking mechanism 72 fixes the slider 64 at the desired torque.
  • the locking mechanism 72 may be formed as a screw, so that a certain position in the slot gate 66 can be fixed.
  • a spring-loaded locking lever 74 may be used instead of the screw.
  • the locking lever 74 has a latching nose 75.
  • This spring-loaded latching lever 74 engages with its latching nose 75 in a latching mechanism 76 a. This fixes a set target torque.
  • the locking lever 74 is in this case actuated via the slider 64.
  • the slider 64 has an actuating pin 78 which moves the locking lever 74.
  • the actuating pin 78 presses the locking lever 74 against the spring force of spring 79 from the locking mechanism 76.
  • the locking lever 74 is pivotally mounted for this purpose. Letting go of the slider 64 causes the locking lever 74 with its locking lug 75 back into the Locking mechanism 76 engages. A set target torque can then no longer be adjusted.
  • the triggering mechanism 24 of the torque wrench 10 functions in the same manner as in the previously described figures. Both the triggering mechanism 24 and the lever assembly 18 are energized by the bow spring 40. Corresponding components are therefore also denoted by the corresponding reference numerals. The adjustability of the bearing pin 42 is provided in the embodiment thereof.
  • Fig. 8 shows the torque wrench 10 according to the invention Fig. 7 in another perspective view with the adjustment mechanism 62.
  • the slider 64 is as long in the slot slot 66 of the lever housing or the mounting frame 23 is moved until a marker on the scale 68, the desired target torque for the release of the torque wrench 10 is set.
  • the support 71 acts via the guide 69 on the bending rod 70, which is coupled via the lever assembly 18 with the trigger mechanism 24. By moving the support 71 along the bending rod 70 change bending properties of the bending rod 70, which in addition to the lever assembly 18 transmits the torque.
  • the torque wrench 10 triggers at the set torque.
  • the spring-loaded locking lever 74 locks the slider 64 at a set target torque (see also Fig. 9 ).
  • the pin 78 engages in the latching mechanism 76.
  • Fig. 9 a more detailed section of the torque wrench 10 without lever housing 12 in the region of the locking mechanism 72 for the slider 64.
  • the slider 64 can be moved in the slot slot 66 of the mounting frame 23 until the desired target torque for the release of the torque wrench 10 is set.
  • the support 71 shortens or lengthens the effective range of the bending rod 70, whereby the target torque is set.
  • the bending rod 70 is connected via the lever assembly 18 with the trigger mechanism 24, ie with the release levers 26, 28, in connection.
  • the spring-loaded locking lever 74 locks the slider 64 at a set target torque.
  • the locking lever 74 engages with its locking lug 75 positively or non-positively in a suitable latching structure, such as one or more profile notches, the latching mechanism 76 a.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP14000266.8A 2013-03-08 2014-01-25 Outil à couple avec mécanisme de déclenchement Active EP2774724B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202013101035U DE202013101035U1 (de) 2013-03-08 2013-03-08 Drehmomentwerkzeug mit Auslösemechanismus

Publications (2)

Publication Number Publication Date
EP2774724A1 true EP2774724A1 (fr) 2014-09-10
EP2774724B1 EP2774724B1 (fr) 2015-12-02

Family

ID=48129439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14000266.8A Active EP2774724B1 (fr) 2013-03-08 2014-01-25 Outil à couple avec mécanisme de déclenchement

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EP (1) EP2774724B1 (fr)
DE (1) DE202013101035U1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106217398A (zh) * 2016-08-25 2016-12-14 杭州宇控机电工程有限公司 一种扭矩工具
WO2022077433A1 (fr) * 2020-10-16 2022-04-21 胡厚飞 Clé dynamométrique à affichage numérique pour un réglage de couple facile
TWI812373B (zh) * 2022-07-29 2023-08-11 胡厚飛 以機械方式調整扭力的數位顯示扭力扳手
WO2024021015A1 (fr) * 2022-07-29 2024-02-01 胡厚飞 Clé dynamométrique à affichage numérique capable de régler le couple de manière mécanique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103707256B (zh) * 2013-12-16 2016-08-17 宁波德诚工具有限公司 一种手用扭矩螺钉旋具的滚针多工位轴向离合结构
JP2024506083A (ja) 2021-05-31 2024-02-08 厚 飛 胡 機械的にトルク調節を行いデジタル表示するトルクレンチ

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996940A (en) * 1959-01-26 1961-08-22 Pendleton Tool Ind Inc Predetermined torque release wrench
DE3911744A1 (de) * 1989-04-11 1990-10-25 Richard Abr Herder Kg Grenzkraft-schraubenschluessel
DE3933913A1 (de) 1989-10-11 1991-04-18 Forst Saltus Werk Drehmomentschluessel
DE19912837C2 (de) 1999-03-22 2001-04-19 Raimund Wilhelm Drehmomentschlüssel
DE10051011A1 (de) 2000-10-14 2002-04-25 Saltus Werk Max Forst Gmbh Drehmomentschlüssel mit einer elektronischen Messeinrichtung
DE102004043217A1 (de) 2003-09-04 2005-03-31 Saltus-Werk Max Forst Gmbh Drehmomentschlüssel
DE102006013147A1 (de) 2006-03-20 2007-09-27 Eduard Wille Gmbh & Co. Kg Drehmomentwerkzeug mit Untersetzungsmechanismus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996940A (en) * 1959-01-26 1961-08-22 Pendleton Tool Ind Inc Predetermined torque release wrench
DE3911744A1 (de) * 1989-04-11 1990-10-25 Richard Abr Herder Kg Grenzkraft-schraubenschluessel
DE3933913A1 (de) 1989-10-11 1991-04-18 Forst Saltus Werk Drehmomentschluessel
DE19912837C2 (de) 1999-03-22 2001-04-19 Raimund Wilhelm Drehmomentschlüssel
DE10051011A1 (de) 2000-10-14 2002-04-25 Saltus Werk Max Forst Gmbh Drehmomentschlüssel mit einer elektronischen Messeinrichtung
DE102004043217A1 (de) 2003-09-04 2005-03-31 Saltus-Werk Max Forst Gmbh Drehmomentschlüssel
DE102006013147A1 (de) 2006-03-20 2007-09-27 Eduard Wille Gmbh & Co. Kg Drehmomentwerkzeug mit Untersetzungsmechanismus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106217398A (zh) * 2016-08-25 2016-12-14 杭州宇控机电工程有限公司 一种扭矩工具
WO2022077433A1 (fr) * 2020-10-16 2022-04-21 胡厚飞 Clé dynamométrique à affichage numérique pour un réglage de couple facile
TWI812373B (zh) * 2022-07-29 2023-08-11 胡厚飛 以機械方式調整扭力的數位顯示扭力扳手
WO2024021015A1 (fr) * 2022-07-29 2024-02-01 胡厚飞 Clé dynamométrique à affichage numérique capable de régler le couple de manière mécanique

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Publication number Publication date
DE202013101035U1 (de) 2013-03-18
EP2774724B1 (fr) 2015-12-02

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