EP2450148A2 - Clé plate dotée d'un renforcement de couple - Google Patents

Clé plate dotée d'un renforcement de couple Download PDF

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Publication number
EP2450148A2
EP2450148A2 EP20110185874 EP11185874A EP2450148A2 EP 2450148 A2 EP2450148 A2 EP 2450148A2 EP 20110185874 EP20110185874 EP 20110185874 EP 11185874 A EP11185874 A EP 11185874A EP 2450148 A2 EP2450148 A2 EP 2450148A2
Authority
EP
European Patent Office
Prior art keywords
torque
wrench according
support plate
drive shaft
wrench
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Withdrawn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
EP20110185874
Other languages
German (de)
English (en)
Inventor
Josef Bättig
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2450148A2 publication Critical patent/EP2450148A2/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Withdrawn legal-status Critical Current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
    • B25B17/00—Hand-driven gear-operated wrenches or screwdrivers
    • B25B17/02—Hand-driven gear-operated wrenches or screwdrivers providing for torque amplification
    • 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
    • B25B23/0078—Reaction arms

Definitions

  • the invention is in the field of manually operable tools and relates to a wrench with a torque gain according to the preamble of the first claim.
  • the tool has a pivotable key part with a recess (8 or 12-Kant) for transmitting an output torque and a separate support over which by means of a screw, which is operated with a torque wrench, a tangential force is transmitted to the key part.
  • the support has 2 holes on which it is positively supported on two spaced from the screw to be operated screwing.
  • the torque is translated by means of the screw drive whereby the control of the input or output torque is done with a hand-operated torque wrench. Due to the action of the screw drive, the key part can be swiveled by approx. 30 to 50 °. After reaching this pivot angle of the screw must be rotated back to its original position either to operate the next screw can, or to operate the same screw by repositioning the key part to another pivoting angle.
  • the inventive wrench should be suitable for very high torques without overloading and deformation occur. Its construction should be simple and its manufacture inexpensive. The direction of actuation of the drive lever and the direction of rotation of the driven wheel should be identical. The wrench should be easy to use and ready to use again.
  • the inventive torque wrench wrench includes a ring key cassette having a pivot arm rotatably mounted on said cassette, torque receiving means externally accessible on the pivot arm for receiving drive torque, externally accessible torque output means on the ring key cassette for output torque output greater than drive torque, and between the ring key cassette and the pivot arm mounted connecting means for establishing an operative connection between the torque receiving means and the torque output means and for amplifying the drive torque in the output torque.
  • the connecting means include a drive eccentric, one with the torque output means operatively connected ring spanner lever and a support plate acting between the output lever and the drive eccentric with a spiral groove.
  • the torque receiving means, the torque output means and the connecting means are substantially surface symmetric with respect to a common plane of symmetry.
  • the ring key cassette and the swivel arm are preferably closed by two parallel to the plane of symmetry, preferably also symmetrical with respect to the symmetry sheet metal parts, which are spaced apart by at least one central part or spacer and are positively connected thereto.
  • the side plates, the at least one spacer plate, the ring key lever plates and the at least one ring key middle part are substantially flat plates which are positively connected preferably by means of cylindrical pins and or rivets, and preferably made of metal.
  • the support device includes a support plate with circular arc-shaped recesses which are arranged along a spiral groove. During each swivel stroke of the drive eccentric, the support plate can be supported on the support pin of the output lever. After each swivel stroke, the support plate is pivoted further by a latching groove and thus gradually increases the support lever length.
  • the arrangement of the torque-absorbing means within the drive eccentric bearing and the eccentric pin allows on the one hand the realization of a small eccentricity or lever arm and thus a large torque ratio and on the other hand small bearing and journal radii, which keep the friction losses within limits.
  • the continuous drive square and the symmetrical design of the drive eccentric enable on the one hand a simple and cost-effective production as well as an actuation from both sides.
  • the ring key cassette and the swing arm are preferably constructed of three or more sheet metal parts.
  • the parts can be produced in a simple and cost-effective manner by means of punching, laser cutting or water jet cutting.
  • the two components can also be produced in one piece by means of investment casting or forging.
  • the torque receiving means and / or the torque output means each have a form element for receiving a shaft.
  • the connecting means are designed such that the driving torque and the output torque are rectified, i. H. By means of pivotal movements during the drive a rectified output rotary motion is generated. The operator would like to intuitively pull the drive in the same direction in which the fastener is to be rotated.
  • the wrench Due to the perfect symmetry, the wrench is evenly loaded. so that unwanted bending or torsional loads omitted.
  • the ratchet wrench can be easily turned to reverse the direction of rotation.
  • the ratchet wrench is characterized by a particularly simple structure and a cost-effective production.
  • the entire power transmission between the individual sheet metal parts takes place in a form-fitting manner via the cylindrical pins or rivets.
  • the plates and the spacers could preferably be connected to one another in a material-locking manner, for example by soldering, only on one side.
  • FIG. 1 shows a view of the wrench with torque gain.
  • the wrench consists essentially of the ring key cassette 1, the pivot arm 10, the support plate 20 and the drive shaft 25.
  • the pivot arm 10 is mounted by means of the bearing pin 18 in the bore 9 of the ring key middle part 3.
  • the pivot arm 10 consists of the spacer plate 12 and the two side plates 11 which are positioned and connected by means of the connecting elements 17.
  • the connecting elements 17 are preferably steel rivets which fix the three parts by corresponding holes 16 in the spacer 12 and in the side plates 11.
  • the drive shaft 25 is mounted with its bearing pin 27 in the holes 14 of the pivot arm side plates 11 and has an eccentric pin 28 in its central region.
  • the eccentric pin 28 has a bore 29 for non-positive reception of a cylindrical pin 30, which projects into the arc groove 15 of the side plates 11 and thus limits the pivot angle of the drive shaft 25 to a meaningful value, in the present case about ⁇ 40 °.
  • the drive shaft 25 has a shaped element 26, preferably a standardized inner square, in which a commercial tool can be applied.
  • the drive shaft acts with the eccentricity 31 of the eccentric pin 28 on the bore 21 of the support plate 20.
  • the support plate 20 acts as the connecting rod of a crank mechanism and thus transmits the eccentric force on the long ring key lever 2.
  • the ratio of the drive lever length or eccentricity 31 to the output lever length 32 should be less than one in any case, so that a corresponding torque transmission takes place. It is z. B. between 1: 2 and 1: 100, preferably between 1: 5 and 1:50 and in the present embodiment is about 1:12.
  • the support plate 20 has a spiral groove 22 with a plurality of circular arc-shaped recesses 23, in the present case eleven locking grooves. During each pivoting stroke of the drive eccentric, the support plate can be supported on the support pin 8 of the output lever 2. After each pivoting stroke, the support plate is pivoted further by a latching groove and thus the support lever length 49 is gradually increased.
  • FIG. 2 illustrates the stepwise Nachong the support plate 20 in the locking grooves 23 of the spiral groove 22.
  • the eccentric 28 is relieved by rotating the drive shaft counterclockwise again.
  • the Rastnutencic 45 now takes place by the support plate 20 in a clockwise direction about a locking groove is pivoted further.
  • the support plate 20 has in its outer region a bearing bore 21 with a lateral opening 24.
  • the opening 24 is smaller than the diameter of the eccentric pin 28 so that it is positively held in the bore 21 but larger than the chord length 50 of the outstanding over the eccentric pin drive shaft journal 27 so that it can be mounted.
  • the bearing bore 21 of the support plate in the region of the opening 24 is accessible from the outside. In the embodiment according to FIG. 3 this opening is covered by a connecting web 36. As a result, contamination of the eccentric pin 28 is prevented from the outside.
  • FIG. 4 shows the wrench in one compared to FIG. 1 about a locking groove elevated position.
  • the drive shaft 25 is again in its maximum possible pivot position by the stop of the eccentric pin 30 at the end of the arc groove.
  • the Abstützhebelin 49 has increased accordingly and the angle of attack has 46 to the angle change 47, in the present case by about 5 °, increased.
  • FIG. 5 and the FIG. 6 show the wrench in an isometric view once analog FIG. 1 in a middle position and once in the maximum possible end position.
  • the 3-part construction of the ring key cassette 1 and the pivot arm 10 is clearly visible.
  • FIG. 7 shows a ring key cassette analogous to the FIGS. 5 and 6 in isometric view.
  • Such cassettes can be manufactured for different key widths and can be easily replaced if necessary by means of the releasable bolts 8 and 18.
  • FIG. 8 shows the support plate 20 with the drive shaft 25 also in an isometric view.
  • the mold element 26 penetrates both the drive shaft journal 27 and simultaneously also the eccentric pin 28. This can on the one hand a small eccentricity and thus realize a large torque ratio and on the other hand, small bearing and journal radii.
  • FIG. 9 shows the wrench in a third embodiment.
  • the support plate 20 has a closed bore 21.
  • To reduce the bearing friction of the eccentric pin 28 is mounted by means of cylindrical rollers 48.
  • a full roller bearing without cage is used.
  • FIGS. 10 and 11 show the inventive wrench in a first embodiment according to the FIG. 1 when tightening a screw 42, 43 of a flange 40,140 with multiple fasteners 142, 143, 242, 243.
  • a commercially available torque wrench 44 is used, with which the required drive torque is applied.
  • the wrench is supported with its supporting region 35 of the support arm 10 on the adjacent nut 142 (to the right of the nut to be attracted 42), through which the reaction force occurring is absorbed.
  • the wrench When changing the direction of rotation (not shown), for example for loosening the screw 42, the wrench is rotated by 180 degrees to the plane of symmetry S twisted onto the fastener 42 so that its support arm side plate 11, which was on top when tightening, now lies down.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP20110185874 2010-11-08 2011-10-20 Clé plate dotée d'un renforcement de couple Withdrawn EP2450148A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH18632010A CH704058A1 (de) 2010-11-08 2010-11-08 Schraubenschlüssel mit Drehmomentverstärkung.

Publications (1)

Publication Number Publication Date
EP2450148A2 true EP2450148A2 (fr) 2012-05-09

Family

ID=45065641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110185874 Withdrawn EP2450148A2 (fr) 2010-11-08 2011-10-20 Clé plate dotée d'un renforcement de couple

Country Status (2)

Country Link
EP (1) EP2450148A2 (fr)
CH (1) CH704058A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492470A (en) 1945-11-29 1949-12-27 American Locomotive Co Torque-reducing wrench

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2607382A1 (de) * 1976-02-24 1977-08-25 Fleischmann Friedrich M Universeller exzenter-kraftschluessel mit drehmomenteinrichtung
DE3131582A1 (de) * 1981-08-10 1983-02-24 Hubert Prof. Dr.-Ing. 8000 München Kurz Vorrichtung zum drehen von radschrauben
DE3404304A1 (de) * 1984-02-08 1984-06-20 Hans-Joachim 5253 Lindlar Müller Radmuttern-hebelschluessel bzw. kombinations-krafthebel
DE3501235A1 (de) * 1985-01-16 1985-06-13 Hans-Joachim 5253 Lindlar Müller Drehmomentverstaerker fuer ratschen
EP0216000A1 (fr) * 1985-09-27 1987-04-01 Hans-Joachim Müller Cliquet pour serrer ou pour desserrer des écrous ou des boulons

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492470A (en) 1945-11-29 1949-12-27 American Locomotive Co Torque-reducing wrench

Also Published As

Publication number Publication date
CH704058A1 (de) 2012-05-15

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