EP0027183A2 - Clé anglaise - Google Patents

Clé anglaise Download PDF

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Publication number
EP0027183A2
EP0027183A2 EP80105567A EP80105567A EP0027183A2 EP 0027183 A2 EP0027183 A2 EP 0027183A2 EP 80105567 A EP80105567 A EP 80105567A EP 80105567 A EP80105567 A EP 80105567A EP 0027183 A2 EP0027183 A2 EP 0027183A2
Authority
EP
European Patent Office
Prior art keywords
lever arm
ring
wrench according
driver
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.)
Granted
Application number
EP80105567A
Other languages
German (de)
English (en)
Other versions
EP0027183B1 (fr
EP0027183A3 (en
Inventor
Johann Müller
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.)
Wagner Paul-Heinz
Original Assignee
Wagner Paul-Heinz
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 Wagner Paul-Heinz filed Critical Wagner Paul-Heinz
Publication of EP0027183A2 publication Critical patent/EP0027183A2/fr
Publication of EP0027183A3 publication Critical patent/EP0027183A3/de
Application granted granted Critical
Publication of EP0027183B1 publication Critical patent/EP0027183B1/fr
Expired 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
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/04—Spanners; Wrenches with rigid jaws of ring jaw type
    • 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
    • B25B23/16—Handles

Definitions

  • the invention relates to a wrench with a non-rotatably connectable ring with a key nut and a lever arm acting on the ring.
  • the lever arm With the usual wrenches, the lever arm is firmly connected to the ring. The moment for tightening or loosening a screw is exerted manually or via a power drive on the lever arm, which in turn then rotates the ring.
  • the ring can have a freewheel or a ratchet, by means of which the key nut can only be taken in one direction of rotation, while the wrench can be turned back empty in the other direction of rotation.
  • a particularly high torque is required in the last phase of tightening or in the first phase of loosening a screw.
  • gear wrenches are known in which power is amplified by a gear transmission. If a screw has been loosened with the aid of the force amplification, the transmission ratio can be changed so that the screw can be turned faster and with less force amplification or without any force amplification in the further course of the free turning on the thread.
  • Such gear wrenches are complex and thus expensive and they have a considerable weight due to the toothed gear.
  • the object of the invention is; to create a wrench of the type mentioned, which can be used both in the usual way by direct action of the lever arm on the ring and in conjunction with a power amplifier for applying high torques.
  • the ring is rotatably mounted on a support foot and that the lever arm is articulated on the support foot and drives the ring via a force-intensifying transmission.
  • the lever arm is thus not fixedly attached to the ring, but is articulated on the support foot.
  • the support foot can be attached to a stationary part, for example to a screw adjacent to the screw to be rotated, in order to derive the reaction force that occurs when the lever arm is acted upon.
  • the lever arm that is at a distance from the Axis of the ring is articulated on the support foot, drives the force-intensifying transmission when it rotates, which in turn then rotates the ring. In this way it is possible to have the necessary high torque act on the key nut or on the screw head with simple means.
  • the lever arm can be rotatably connected to the support foot by a locking device. Since it is now no longer possible to pivot the lever arm relative to the support foot, the force-increasing transmission is switched off.
  • the lever arm and the support foot act in this state as a single part on the ring, so that the ring is rotated to the same extent as the lever arm is pivoted about the axis of the ring.
  • the ring has at least one driver which projects into the pivoting range of the lever arm around its articulation point on the support foot.
  • the lever arm presses against the driver.
  • the lever arm acts as a one-armed lever, which increases the force.
  • the ring therefore performs a smaller angular rotation than the lever arm. This means that the torque applied to the ring is greater than the torque applied to the lever arm.
  • the driver can be connected to the lever arm in an articulated manner, the lever arm being connected via an elongated hole guide the slot is supported.
  • the elongated hole guide is necessary because the distance that the end of the lever arm has from the axis of the ring changes in the course of the pivoting movement of the lever arm.
  • the pin can also be designed as a freely rotatable roller.
  • the driver consists of an opening in an extension projecting laterally from the ring, into which a pin projecting from the lever arm engages.
  • the driver can also consist of at least one projection protruding from the ring, which acts laterally on the lever arm directly or via a roller.
  • the ring has a first toothing element, on which a second toothing element mounted on the support foot and firmly connected to the lever arm rolls in mutual engagement of the toothings.
  • the force or torque is amplified from the lever arm to the ring via a gear drive.
  • the ring In the case of the wrench, the ring can be connected to the key socket in such a way that it is rotated in both directions. But it is also possible to make the connection between the ring and key nut only in one direction of rotation, while in the other direction of rotation the ring can be freely turned back relative to the key nut.
  • a freewheel or a ratchet can be arranged between the ring and the key nut.
  • a wrench that is equipped with such a ratchet only needs one driver if the force is to be increased in only one direction of rotation.
  • the tension element can be a hinge plate, which is articulated to the driver and the lever arm.
  • the pulling element can also be a cable pull or the like.
  • the wrench can be equipped with a conventional torque measuring device for measuring the tightening torque, which is expediently attached to the support foot.
  • the wrench has a ring 10 which is provided with a continuous hexagon opening 11 for inserting a key nut.
  • the ring 10 is rotatably mounted in a bore of a support leg 12 consisting of a flat iron. Its cylindrical bearing surface is delimited by an annular shoulder 13 and by a circlip 14 inserted into an annular groove. The ring 10 can thus be rotated in the opening of the support foot 12.
  • the ring 10 also has above the plate-shaped support foot 12 lugs 15, 16 which protrude like pliers from the main body of the ring 10.
  • the lever arm 17 In the plane of the lugs 15 and 16 there is the lever arm 17 which is mounted on a pin 18 protruding from the support foot 12.
  • the lever arm 17 can thus be pivoted parallel to the plane of the support foot 12 and in a plane running perpendicular to the axis of the ring 10.
  • the distance that the axis of the pin 18 has from the axis of the ring 10 or the opening 11 is smaller than the distance that the effective outer ends of the lugs 15 and 16 have from the axis of the ring 10 or the opening 11 .
  • the lever arm 17 has essentially parallel edges which, however, have bulges 19, 20 in the region of the lever 17 which cooperates with the effective ends of the lugs 15 and 16.
  • the wrench works according to the
  • Figures 1 and 2 is as follows: If the screw head to be rotated is to be rotated counterclockwise with a large torque, for example to loosen the screw, then the support foot 12 is placed with its side shown on the right in FIG. 1 against a fixed support. The lever arm 17 is rotated counterclockwise. The bulge 20 presses against the shoulder 15 of the ring 10, whereby a torque is exerted on the ring 10 in the counterclockwise direction. As a result of the distance that the pin 18 has from the axis of the ring 10, this torque is considerably greater than the torque, for example manually applied to the lever arm 17.
  • the lever arm 17 can be locked in relation to the support leg 12 for the purpose of turning it further. This takes place, for example, with a pin 21 which is inserted transversely through the lever arm 17 and can be inserted into a recess 22 in the support leg 12, so that the lever arm 17 and the support leg 12 are locked relative to one another.
  • the support leg 12 In order to be able to turn the wrench in the locked state, the support leg 12 must of course be removed from the stationary support (not shown). Since the hexagon bore 11 is continuous, the key nut according to FIG. 2 can be inserted into the hexagon bore either from the right or from the left.
  • the wrench is used in the same way in principle, but with the lever arm 17 when the lock is released 21, 22 is rotated clockwise. In this case, the bulge 19 presses against the shoulder 16 in the last phase of tightening, so that torque is also amplified in this direction.
  • a freewheel can be arranged between the ring 10 and the key nut (not shown), which only allows the key nut to be carried in one direction of rotation.
  • a pin 18 ′ protrudes into an elongated hole 28 of the support foot 12 which extends in the longitudinal direction of the support foot 12.
  • the pin 25 has a greater distance from the axis of the ring 10 than the pin ⁇ 8 1 .
  • the non-circular pin 18 "shown in FIG. 4a can be used instead of a cylindrical pin 18 '.
  • the pin 18" consists of a triangular rolling element with spherical outer surfaces.
  • the torque can be increased independently of the pivoting position of the lever arm 17 by appropriate shaping of the pin 18 ". It is thus possible to attach a torque measuring device either to the lever arm 17 or to the support foot 12 in order to determine the force or force applied the reaction force to measure the torque exerted on the screw.
  • FIGS. 5 and 6 also largely corresponds to the exemplary embodiment in FIGS. 1 and 2.
  • the ring has only a single extension 15 which lies in the same plane as the lever arm 17. This wrench is therefore only in one direction of rotation effective.
  • the end of the extension 15 is connected to the lever arm 17 via a joint member 27.
  • the articulated member 27 is a tab which at one end articulates on the end of the extension 15 and at the other end articulates on the lever arm 17. If the lever arm 17 is turned back (clockwise), the joint member 27 also pulls the ring 10 back over the extension 15. During this movement, the sleeve 26 is not rotated. Instead of the joint member 27 another pulling element could also be used.
  • the force is amplified via a gearwheel 30 which is non-rotatably connected to the lever arm 12 and which rolls on the internal toothing 31 of a toothing element 32 connected to the ring 10.
  • the toothing element 32 represents an arc around the axis of the ring 10. It overlaps the front end of the lever arm 17th
  • the axis 33 of the gear 30 is rotatably supported in a bore of the support foot 12.
  • the axis 33 protrudes through a bore at the front end of the support leg 12. In this bore, it is connected to the lever arm 17 in a rotationally fixed manner with a cross section 34.
  • the gear 30 is rotatably attached.
  • lever arm 17 If the lever arm 17 is pivoted about the axis 33, then it rotates the gearwheel 30 and this in turn rotates the toothing element 32. Because of the different pitch circle diameters, there is a strong reduction, so that the rotary movement which the ring 10 executes is substantially smaller than that Pivotal movement that the lever arm 17 has performed. This results in a torque increase.
  • the gear 30 need not be provided with a circumferential toothing, since only a part of the circumference of this gear is used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP80105567A 1979-10-10 1980-09-17 Clé anglaise Expired EP0027183B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2941045 1979-10-10
DE2941045A DE2941045C2 (de) 1979-10-10 1979-10-10 Schraubenschlüssel

Publications (3)

Publication Number Publication Date
EP0027183A2 true EP0027183A2 (fr) 1981-04-22
EP0027183A3 EP0027183A3 (en) 1981-09-02
EP0027183B1 EP0027183B1 (fr) 1983-10-12

Family

ID=6083145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105567A Expired EP0027183B1 (fr) 1979-10-10 1980-09-17 Clé anglaise

Country Status (4)

Country Link
US (1) US4377955A (fr)
EP (1) EP0027183B1 (fr)
JP (1) JPS5656390A (fr)
DE (1) DE2941045C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992008620A1 (fr) * 1990-11-13 1992-05-29 Norberto Lopez Martinez Appareil dynamogenique pour serrer-desserrer des ecrous ou boulons de roues de vehicules

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4546676A (en) * 1984-04-16 1985-10-15 Kiefer Tool Co., Inc. Torque-multiplying hand wrench
DE3504315C1 (de) * 1985-02-08 1986-10-23 Karl Dipl.-Ing.(FH) 4040 Neuss Weinhold Vorrichtung zum Lösen von Radmuttern und Radschrauben bei Kraftfahrzeugen
AT393152B (de) * 1986-11-25 1991-08-26 Steyr Daimler Puch Ag Vorrichtung zum verdrehen der nockenwelle einer hubkolben-brennkraftmaschine in ihre auf die kurbelwellendrehstellung bezogene grundstellung
KR890701924A (ko) * 1987-10-22 1989-12-22 원본미기재 가변 토크 전개장치
EP0323350B1 (fr) * 1987-12-28 1993-10-20 Shin-Etsu Handotai Company Limited Procédé pour l'extinction des incendies de matériaux dangereux difficiles à éteindre
SE509414C2 (sv) 1997-05-26 1999-01-25 Ingvar Hejninger Handverktyg med stödarm och spärrmekanism och ett förfarande för lossning av fästorgan
CH701403A1 (de) 2009-07-03 2011-01-14 Josef Baettig Ratschenschlüssel mit Drehmomentverstärkung.
KR101144006B1 (ko) * 2011-02-11 2012-05-15 미주오토텍주식회사 스패너
TW201417960A (zh) * 2012-11-06 2014-05-16 Ji-Lin He 具有兩種鎖緊操作方式之扳手
US10399214B2 (en) * 2014-12-17 2019-09-03 Stanley D. Winnard Ratchet wrench

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH402770A (de) * 1961-11-22 1965-11-15 Carl Walter Schraubwerkzeug Fa Schraubwerkzeug
DE1603842A1 (de) * 1967-09-07 1971-09-09 Eggert Ohg Jakob H Schraubenschluessel
US3789707A (en) * 1972-10-24 1974-02-05 J Belknap Two speed wrench

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1101022A (en) * 1913-06-27 1914-06-23 Howard R Adams Wrench.
DE1013488B (de) * 1955-09-06 1957-08-08 Wagner & Co Werkzeugmaschinenf Vorrichtung zum Ausueben grosser Drehmomente auf Verstellspindeln oder Muttern von Spanneinrichtungen u. dgl.
US2875658A (en) * 1957-12-12 1959-03-03 Benjamin Howard Insulated lever-means for a ratchet wrench
US2972919A (en) * 1959-03-03 1961-02-28 Alfred R Stalkup Reversible ratchet wrench
US3019681A (en) * 1959-11-20 1962-02-06 Everett D Grissom Reversible ratchet wrench
US3447404A (en) * 1967-09-27 1969-06-03 Gaston Lachance Socket wrench with lever operated pawl means and a thrust block for said pawl means
US3557644A (en) * 1968-11-18 1971-01-26 Gerrett W Gregory Squeeze action wrench
US3616714A (en) * 1969-08-25 1971-11-02 Gerrett W Gregory Rack and pinion squeeze action wrench

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH402770A (de) * 1961-11-22 1965-11-15 Carl Walter Schraubwerkzeug Fa Schraubwerkzeug
DE1603842A1 (de) * 1967-09-07 1971-09-09 Eggert Ohg Jakob H Schraubenschluessel
US3789707A (en) * 1972-10-24 1974-02-05 J Belknap Two speed wrench

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992008620A1 (fr) * 1990-11-13 1992-05-29 Norberto Lopez Martinez Appareil dynamogenique pour serrer-desserrer des ecrous ou boulons de roues de vehicules

Also Published As

Publication number Publication date
EP0027183B1 (fr) 1983-10-12
US4377955A (en) 1983-03-29
JPS5656390A (en) 1981-05-18
DE2941045A1 (de) 1981-06-04
DE2941045C2 (de) 1981-11-19
EP0027183A3 (en) 1981-09-02

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