EP0336136B2 - Embout de tournevis - Google Patents

Embout de tournevis Download PDF

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Publication number
EP0336136B2
EP0336136B2 EP89104230A EP89104230A EP0336136B2 EP 0336136 B2 EP0336136 B2 EP 0336136B2 EP 89104230 A EP89104230 A EP 89104230A EP 89104230 A EP89104230 A EP 89104230A EP 0336136 B2 EP0336136 B2 EP 0336136B2
Authority
EP
European Patent Office
Prior art keywords
section
intermediate section
length
screwdriver
screwdriver bit
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
EP89104230A
Other languages
German (de)
English (en)
Other versions
EP0336136B1 (fr
EP0336136A1 (fr
Inventor
Karl Lieser
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.)
Wera Werk Hermann Werner GmbH and Co KG
Original Assignee
Wera Werk Hermann Werner 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6349389&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0336136(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Wera Werk Hermann Werner GmbH and Co KG filed Critical Wera Werk Hermann Werner GmbH and Co KG
Priority to AT89104230T priority Critical patent/ATE75982T1/de
Publication of EP0336136A1 publication Critical patent/EP0336136A1/fr
Application granted granted Critical
Publication of EP0336136B1 publication Critical patent/EP0336136B1/fr
Publication of EP0336136B2 publication Critical patent/EP0336136B2/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
    • 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
    • B25B15/00—Screwdrivers
    • 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
    • B25B15/00—Screwdrivers
    • B25B15/001—Screwdrivers characterised by material or shape of the tool bit
    • 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

Definitions

  • the invention relates to a screwdriver bit according to the preamble of claim 1 (see 2.B EP-A-0221279)
  • a twistable zone serves as a predetermined breaking point.
  • the intermediate section breaks when a target torque is reached.
  • the object of the invention is based on the object of a generic screwdriver insert to design in a technically simple manner so that acting on the screwdriver bit Torque peaks do not cause deformation of the screwdriver tip section that Lifespan increased and working with machine screwdrivers is considerably easier.
  • a generic screwdriver insert is of increased height Use value specified. If higher torque peaks are effective on the screwdriver insert, for example caused by abruptly occurring drive force peaks or by different Condition of the material receiving the screw, the intermediate section between Drive end section and output end section an elastic twist / torsion.
  • the intermediate section provides an elastic flexible element with corresponding resilience after overcoming the peak load. It endures larger Moments, even with repeated loads. He absorbs deformation work and partially stores it in the form of potential energy and releases it when it is relieved back again.
  • the intermediate section acts as a damper, so that torque peaks are not directly proportional to Screwdriver tip section take effect. This does in a particularly long service life of the screwdriver insert and the screw noticeable.
  • the intermediate section twists.
  • the screwdriver tip can be the intermediate section in its length and its cross-section are designed so that any energy peaks are always absorbed under load will.
  • the ratio at normal steel as material for DIN-standardized use
  • the ratio corresponds in particular the length of the intermediate section about 3 times hers Diameter.
  • a further possibility to solve the task according to the invention is one Provide axial cavity in the intermediate section by the Polygonal section runs out. The axial cavity can be changed / adjusted of the torsional resistance moment of the intermediate section can be chosen differently in diameter and also of different lengths.
  • the intermediate section is preferably one opposite the polygonal section stepped circular section. Screwdriver bits to transmit low torques a correspondingly smaller intermediate section.
  • the number 1 denotes a screwdriver bit in DIN standard (size 2). With this one Phillips screw 2 illustrated in Fig. 1 are rotated. The latter consists of one a thread 3 having screw shaft 4 and a countersunk head 5, which contains the cross recess 6.
  • the screwdriver tip 7 is designed in accordance with the cross recess 6 and the associated DIN standard. This has four driving ribs 8 arranged in the same circumferential distribution and thus forms the output end region 9 (screwdriver tip section). This is followed by a circular cross section Intermediate section 10, which the aforementioned screwdriver tip section 9 and the drive end portion 11 connects with each other.
  • the force-transmitting depth of penetration into the screw is generally sufficient only about a maximum of half of section Ab and is in any case DIN-standardized for the test torques.
  • At the conical step 12 from the circular cross section of the intermediate section 10 to the polygonal section 11 rests on the elastic ring 16, arranged in an inner groove 15 of the machine chuck 13, and pulls thereby inserting the screwdriver 1 into the machine chuck 13 until the thread surface 17 at the bottom of the Machine feed 13 is present.
  • This bracket can have considerable tolerances because of the pulling moment compensate for what in turn the production of insert 1 overall by way of (never so absolutely accurate cold deformation to be carried out.
  • the total length of the screwdriver bit 1 shown is 25 in accordance with the DIN standard mm.
  • the one minus the polygonal section is about 17 mm.
  • the intermediate section 10 (including the Section S) and output end section thus take up approximately 70% of the total length of the insert 1.
  • the length Zone S is approximately half the length of the section Ab and approximately just the length of the in Screw submersible output end section; the remaining length of the intermediate section 10 from the roots 8 '' up to level 16 a little more than twice the length of this output end section Ab or somewhat more than four times the length of zone S.
  • the length of the intermediate section 10 plus zone S is therefore approx. 11 mm, the one plus the output end section 9, ie 17 mm, the one up to the level of the normal screw insertion depth approx.
  • the screwdriver bit 1 is attached in such a way that his screwdriver tip 7 positively engages in the Phillips 6 of the Phillips screw.
  • this leads to a resistance that remains in the elastic range Torsion of the intermediate section 10, primarily on its area T. Its torsional modulus is also less than the section modulus Screwdriver tip section 9. Large energy spikes are accordingly eliminated so that the screwdriver tip 7 Protected against excessive loads remains associated with an increased service life.
  • the second embodiment of the screwdriver bit 18 illustrated in FIG. 3 largely corresponds the design described above.
  • the same components are therefore provided with the same reference numbers.
  • an axial cavity 19 now extends from the polygonal section 11 which extends over the intermediate section 10 and ends before the tip section 9 or the zone S.
  • a change or adaptation option for the torsional modulus is obtained of the intermediate section 10, so that torsion of the same may occur even at very low loads.
  • a variation can be obtained in such an embodiment in that the diameter is different large axial cavities can be selected.
  • the torsional modulus of the intermediate section can be determined by its shape and cross-sectional size 6 determine. It is therefore an optimal adaptation to a wide variety of circumstances possible.

Landscapes

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

Claims (7)

  1. Pièce d'insertion pour tournevis, avec une zone d'entraínement placée à l'extrémité pour enfichage dans un mandrin de machine, un tronçon intermédiaire et une zone entraínée, avec une pointe de tournevis (7), qui présente des nervures d'entraínement (8), disposées suivant une répartition périphérique régulière, pour s'engager dans des vis à fente en croix et dont les sommets (8') font saillie radialement au-dessus de la section transversale du troncon intermédiaire (10), caractérisée en ce que le tronçon intermédiaire comporte une zone susceptible d'être tordue, en ce que le rapport entre le diamètre et la longueur du tronçon intermédiaire (10) qui présente une section transversale constante, est inférieur à 0,5 et supérieur à 0,2 et en ce que le quotient entre la limite de déformation à la torsion et le module de torsion de la zone susceptible d'être tordue est tel que, jusqu'à ce que l'on ait atteint le couple de rotation aboutissant à une déformation plastique/à la rupture, l'angle de rotation de retour, qui résulte de la force de rappel élastique du tronçon intermédiaire (10), est situé entre 3,5 et 8 degrés, à l'exception des pièces d'insertion pour tournevis, pour lesquelles le rapport entre le diamètre et la longueur du tronçon intermédiaire est inférieur/égal à 0,253 et à l'exception de celles pour lesquelles l'angle de rappel en rotation est inférieur à 4,1 degrés.
  2. Pièce d'insertion pour tournevis selon la revendication 1, caractérisée en ce que le rapport entre le diamètre et la longueur du tronçon intermédiaire, d'une longueur d'environ 14mm, est inférieur à 0,5.
  3. Pièce d'insertion pour tournevis selon une ou plusieurs des revendications précédentes, caractérisée en ce que le rapport entre le diamètre et la longueur du tronçon intermédiaire (10), qui arrive jusqu'aux sommets (8') des nervures (8) est de 1/3 et d'environ 1/4 jusqu'à la pointe de la pièce d'insertion de tournevis (9').
  4. Pièce d'insertion pour tournevis selon une ou plusieurs des revendications précédentes, caractérisée par un évidement axial (19) ménagé dans le tronçon intermédiaire (10).
  5. Pièce d'insertion pour tournevis selon une ou plusieurs des revendications précédentes, caractérisée en ce que les sommets (8') des nervures d'entraínement (8) forment jusqu'à leur racine une zone S, dont la résistance dynamique à la torsion est inférieure à celle du reste du tronçon intermédiaire (10).
  6. Pièce d'insertion pour tournevis selon une ou plusieurs des revendications précédentes, caractérisée en ce que le tronçon intermédiaire (10) s'étend, avec une section transversale circulaire constante, jusqu'à un étagement tronconique (16) de transition vers le tronçon à plusieurs pans (11), cet étagement ne prenant qu'environ 1/7 de la longueur du tronçon intermédiaire (10) et, sur cette longueur, faisant la transition avec environ le double de la section transversale du tronçon à plusieurs pans (11), avec un angle de cône d'environ 50°.
  7. Pièce d'insertion pour tournevis selon une ou plusieurs des revendications précédentes, caractérisée en ce que le diamètre du tronçon intermédiaire (10) est supérieur à la longueur de la zone S et est un peu inférieur à la longueur (Ab) du tronçon d'extrémité entraíné (9).
EP89104230A 1988-03-10 1989-03-09 Embout de tournevis Expired - Lifetime EP0336136B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89104230T ATE75982T1 (de) 1988-03-10 1989-03-09 Schraubendrehereinsatz.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3807972 1988-03-10
DE3807972 1988-03-10

Publications (3)

Publication Number Publication Date
EP0336136A1 EP0336136A1 (fr) 1989-10-11
EP0336136B1 EP0336136B1 (fr) 1992-05-13
EP0336136B2 true EP0336136B2 (fr) 1998-03-11

Family

ID=6349389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89104230A Expired - Lifetime EP0336136B2 (fr) 1988-03-10 1989-03-09 Embout de tournevis

Country Status (6)

Country Link
EP (1) EP0336136B2 (fr)
JP (1) JPH02503405A (fr)
AT (1) ATE75982T1 (fr)
DE (1) DE58901364D1 (fr)
ES (1) ES2032619T5 (fr)
WO (1) WO1989008536A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4243608C2 (de) * 1992-12-22 2000-10-19 Werner Hermann Wera Werke Werkzeug
US5535867A (en) * 1993-11-01 1996-07-16 Coccaro; Albert V. Torque regulating coupling
AU686597B2 (en) * 1994-01-26 1998-02-12 Vermont American Corporation Insert bit for use with a powered screwdriver
GB2476917B (en) 2008-11-07 2013-10-23 Milwaukee Electric Tool Corp Tool bit with curved shank
USD711719S1 (en) 2009-11-06 2014-08-26 Milwaukee Electric Tool Corporation Tool bit
DE102010038210A1 (de) 2010-10-15 2012-04-19 Wera-Werk Hermann Werner Gmbh & Co. Kg Drehmomentübertragungsvorrichtung zur Verwendung mit einem Drehschlagschrauber
US8955418B2 (en) 2013-03-08 2015-02-17 Black & Decker Inc. Threaded fastener driving tool
US10022845B2 (en) 2014-01-16 2018-07-17 Milwaukee Electric Tool Corporation Tool bit
US11638987B2 (en) 2017-12-01 2023-05-02 Milwaukee Electric Tool Corporation Wear resistant tool bit
USD921468S1 (en) 2018-08-10 2021-06-08 Milwaukee Electric Tool Corporation Driver bit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2619860A (en) * 1946-08-14 1952-12-02 Jr Ralph E Gray Flexible tool with predetermined overload yielding means
US2501386A (en) * 1947-11-13 1950-03-21 Gibbs George Gordon Portable power transmitting unit and changeable toolholder
DE1603708A1 (de) * 1966-02-17 1970-09-17 Bauer & Schaurte Schrauben U M Verfahren zum Anziehen von Schrauben
DE2231949A1 (de) * 1971-07-26 1973-02-08 Xerox Corp Drehmomentwerkzeug
SE7316910L (sv) * 1973-12-14 1975-06-16 Irvator Ab Momentverktyg, serskilt momenthylsnyckel.
DE3538675A1 (de) * 1985-10-31 1987-05-07 Werner Hermann Wera Werke Schraubendrehereinsatz

Also Published As

Publication number Publication date
DE58901364D1 (de) 1992-06-17
WO1989008536A1 (fr) 1989-09-21
ES2032619T3 (es) 1993-02-16
EP0336136B1 (fr) 1992-05-13
ES2032619T5 (es) 1998-07-01
ATE75982T1 (de) 1992-05-15
JPH02503405A (ja) 1990-10-18
EP0336136A1 (fr) 1989-10-11

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