EP0942807B1 - Tournevis ou embout tournevis - Google Patents

Tournevis ou embout tournevis Download PDF

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Publication number
EP0942807B1
EP0942807B1 EP97952010A EP97952010A EP0942807B1 EP 0942807 B1 EP0942807 B1 EP 0942807B1 EP 97952010 A EP97952010 A EP 97952010A EP 97952010 A EP97952010 A EP 97952010A EP 0942807 B1 EP0942807 B1 EP 0942807B1
Authority
EP
European Patent Office
Prior art keywords
screwdriver
flank
notch
flanks
face
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
EP97952010A
Other languages
German (de)
English (en)
Other versions
EP0942807A1 (fr
Inventor
Andreas Reusch
Giuseppe De Bona
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
Priority claimed from DE29715772U external-priority patent/DE29715772U1/de
Application filed by Wera Werk Hermann Werner GmbH and Co KG filed Critical Wera Werk Hermann Werner GmbH and Co KG
Publication of EP0942807A1 publication Critical patent/EP0942807A1/fr
Application granted granted Critical
Publication of EP0942807B1 publication Critical patent/EP0942807B1/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
    • B25B15/00—Screwdrivers
    • B25B15/001—Screwdrivers characterised by material or shape of the tool bit
    • B25B15/004—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
    • B25B15/005—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section with cross- or star-shaped cross-section

Definitions

  • the invention relates to a screwdriver or screwdriver bit with one drive, one Output end and an intermediate shaft, the output end in the form of at least three, preferably four, which ribs is profiled from a center section lying around the axis of rotation radially go out, each have a front end, which has an inclination to the axis of rotation, and front and rear flanks, which in the area adjacent to the forehead essentially run parallel to each other, in which area the front flank on a related to the axis of rotation Diametral surface lies, the flanks being adjacent Ribs a longitudinal notch form with one in the lateral surface of a shaft section leaking notch base.
  • the ribs are offset, and essentially by the measure of the rib thickness.
  • the a flank namely the breast flank on the insertion side, lies with the corresponding flank of the opposite Rib (of course in the case of cross ribbing) with this on a common diamond.
  • the associated screw head is decentralized to this Inlets of the ribs matched.
  • the one in the same groove subsequent rear flank is over the insertion depth essentially parallel, but then goes into one concave fillet over so that the notch edge edges at the foot of the completely flat flank on the wall side to meet.
  • the rounding goes over a quarter circle. This leads to a fairly large volume of material clearing in the base area of the output end with a certain Tendency to weaken.
  • the object of the invention is a generic Screwdriver or screwdriver bit for screwdriving to design more advantageous and stable.
  • the front flank has an additional curvature around the longitudinal direction with projecting radially outer section of the forehead area the flank.
  • Such an embodiment is from Importance. It results from one going in the direction of work, in the most varied Way of creating torsion of the ribs. The also brings undercut radially inwards in the forehead area Flanks. So one is created for that Screw in screws far radially outwards and therefore a particularly leverage point of attack. It is also an advantage, even if the rear one Flank an additional curvature around the longitudinal direction has correspondingly falling back radially outer portion of the forehead area. Overall renders one diagonally in the corresponding Slot section of the cross slot inserting rib, which favors the clamping effect explained above.
  • the Output end in the form of at least three, preferably four, ribs is profiled, which ribs from one around the center section lying radially extends radially, each have an end face, which a Has inclination to the axis of rotation, and front and form back flanks, which in that of the forehead adjacent area substantially parallel to each other run in which area the front Flank on a diametrical surface related to the axis of rotation lies, the flanks of adjacent ribs form a notch running in the longitudinal direction with one that runs into the lateral surface of a shaft section Notch reason that the two flanks in the forehead area each rib, starting from one in the immersion profile (Phillips) of the screw head entering Parallel flank section, in the axial direction from each other are curved to the ground, the beginning of the curvature in Area of the mouth of the immersion profile.
  • the notch reason runs out with notch edges meeting at an acute angle, it is advantageous that the notch edges meet at an angle of approx. 40 °.
  • a advantageous development of the generic screwdriver or screwdriver bit in that the distance between the tip and the start of curvature is smaller than the immersion depth of the screw head into the immersion profile. This ensures an advantageous one Edge between tool and fastener speak screw. It is favorable here that the width the rib at the level of the profile depth of the screw head immersion profile is larger than the mouth width of the Immersion profile.
  • the invention brings in Proposal that the parallel flank section subsequent curvature surfaces are twisted. So The clamping effect explained above also arises here between the cross profile, i.e.
  • the screw profile according to the invention is used in aviation. It is common there Use screws only once.
  • the invention Profile is particularly suitable for the screws unscrew because the flanks of the ribs are no planes but curved surfaces.
  • the new geometry is particularly effective when unscrewing not through the center of rotation of the tool extending flank advantageous. That this flank assigned notch edge runs back slightly to the groove base in relation to a parallel plane the rear flank of the associated rib.
  • the screwdriver bit S shown is rod-shaped educated. In this respect it can also a screwdriver right away.
  • the screwdriver bit S has a drive end 1 and an output end 2, also called working end.
  • the drive end 1 is provided with an annular groove 3.
  • the tool can be used here, for example Assign the motor screwdriver axially secured.
  • the turning entrainment in a corresponding chuck is based on the non-circular, specifically hexagonal cross-sectional shape of shaft 4 of screwdriver bit S.
  • the largest length section is in the latter.
  • the output end 2 is approximately up to the width across flats of the hexagonal cross section and forms one predominantly cylindrical head as a stepped shank section 5 of the tool.
  • the free end of the shaft section 5 goes into a cross profile 6 over. This has four ribs 7. They go one around the geometric axis of rotation x-x of the tool lying center section 8, in essential radial extension and the same Angular distance.
  • the gaps between the ribs 7 of the cross profile 6 are realized as notches 9. They are asymmetrical V-notches. They are still far beyond the depth of intervention y of the cross profile 6 in the direction of the shaft 4 continues. You end up in a self-notched Base region 10 of the shaft section 5.
  • the aspect ratio from base area 10 to notched zone is approximately 1: 4.
  • ribs 7 are in relation to their Forehead inclined to the axis of rotation x-x- aligned.
  • On Part of the forehead 11 is at least partially rib-shaped already in the frustoconical Center section 8 over.
  • a cone tip 12 falls with the axis of rotation x-x together.
  • the ribs 7 each form a front flank 13 and a rear flank 14, based on an insertion direction a screw 15 clockwise. In cross section seen, they run, roughly speaking, parallel to each other (see Fig. 8).
  • the center offset and the same width of the ribs 7 can with the same radial distance of the notch 16 the Notches 9 flanks 13, 14 of different widths are formed.
  • the front (13) are dimensioned radially shorter.
  • the ratio is 1: 1.5 (see Fig. 8).
  • the transition is the inner edge the uncurved flank 13 to the curved flank 14 of the Score 16.
  • the flanks 13, 14 adjacent ribs 7 in approximately the penetration depth y corresponding end area of the ribs 7 in the circumferential direction curved away from each other. That draws on the outer wall side of the head and base area 10 formed shaft section 5 so that that of the front Flank 13 facing notch edge 13 'in further course going in the direction of the shaft 4 the continuously curved flanks 13 is curved over a smaller circumferential angle alpha than the notch edge 14 'which is also continuous continuously curved rear flank 14. This larger circumferential angles are denoted by beta.
  • the Ratio is 1: 3.
  • each notch 9 runs in the end region of the tool acute-angled to the axis of rotation x-x near the center off, of course related to an axis parallel to the room Axis of rotation x-x, defined there by the front Exit point 16 'of the notch base 16.
  • the zero point the wedge-out course lies in height in the center area 8.
  • the The end area of the tool is the course of the curvature of the flanks 13 and 14 and that of the notch base 16 to the extent that a slightly converging Alignment of the areas or lines exists.
  • This can be an advantageous centering plus clamping effect with regard to the cross-sectional contour of a Reach cross slot 17 of screw 15.
  • the corresponding one Phillips 17 is in the head 18 of the Screw 15 (see Fig. 10).
  • each rib 7 has an additional Curvature, namely around the longitudinal direction of the screwdriver bit S going. That practically leads to a trough of the flank 13 and a clear one Twisting of the ribs 7. This causes the radial to jump outer section 13 '' of the forehead area in the working direction A facing edge 13 is striking.
  • the Distortion angle is designated with gamma and leads peripheral to about 3 ° lead compared to that in FIG. 8 registered vertical diametrals D-D.
  • the through the corresponding twist achieved additional curvature 7 is also particularly relevant to the longitudinal direction vividly.
  • the mentioned section 13 '' corresponds to the contour Formation of the cross slot 17 is not diagonal Alignment against the corresponding slot counter surface, but with a protruding point of attack at a more favorable lever position.
  • the rear flank 14 also has an additional, however opposite curvature around the longitudinal direction of the screwdriver bit S. Accordingly there is also a falling back radially outer one Section of the end region of the flank 14 in front, here but going inwards and also a clear one Forming trough of flank 14.
  • the weakly conical shape of the central section 8 includes the ribs 7 approximately at an angle of 45 ° inclined course, approximately in the form of an imaginary one Truncated cone.
  • the obtuse-angled transition between the portion of the Ribs 7 and the peripherally adjoining, frustoconical side The main area of the ribs 7 is 19 designated.
  • the distance z corresponds approximately one third of the radial distance between the tip of the cone and the line of the obtuse-angled transition 19.
  • the sweeping is meant on a level basis.
  • notch reason 16 towards the base area 10 with those meeting at an acute angle Notch edges 13 ', 14' runs out.
  • the one there Meeting point is marked with 20 and coincides with the peripheral end 16 '' of the concave notch base 16 together.
  • the notch edges 13 ', 14' meet in one acute angle of about 40 ° together.
  • the cross profile 6 can be in the manner shown generate advantageous in the rotary manufacturing process.
  • the corresponding profiler is through the DE patent 19 21 514 known and is here full content included, also for the purpose, characteristics of these documents to include in claims of the present application.
  • the screwdriver bit shown in Figures 11 to 15 is with regard to the flank geometry trained.
  • the design features relating to the basic principle correspond to those of the basic version the screwdriver bit S or screwdriver, for whatever reason the reference symbols are analogous are used, some without repetitions.
  • the structure is now such that the two flanks 13, 14 in the forehead area of each rib 7, starting from one in the immersion profile speak cross recess 17 of Screw head 18 entering parallel flank section 7a curved in the axial direction pointing away from each other are.
  • the beginning of the curvature of the rib 7 is 7b designated. It can be a continuous one Connection to the curved parts of the flanks 13, 14 act or a trapezoidal flank section 7c.
  • the wider base of the trapezoidal flank section 7c faces the shaft section 5 of the tool.
  • the angles of the trapezoidal flanks can be steeper at 13 than at 14.
  • the start of the curvature lies in the plug connection with the screw 15 7b in the area of the mouth 21 of the immersion profile of the screw head 18, compare FIG. 15.
  • the corresponding taper towards the cone tip 12 of the trapezoidal flank section 7c and the same in the same width as the head subsequent parallel flank section 7a favor the pin assignment due to the initial larger game and then the rich takeaway in the Area of mouth 21.
  • the cone tip 12 stands from the base 22 of the plug-in profile, the Phillips 17 so from.
  • the ratios are such that the distance between the tip of the cone 12 and the start of curvature 7b is smaller than the immersion depth T in the immersion profile of the screw head 18th
  • a reference plane E-E is therefore placed in FIG. which is the main region on the frustum wall side corresponds to the ribs 7 and is designated 19. Accordingly, the subject is geometric according to further training formed so that the flanks of the parallel flank section 7a lie on an axial length J1.
  • the flanks of the trapezoidal flank section run only after the length J1 7c to that shown in the drawing defined length J2, under two cutter head infeed angles except for a width F2 (cf. Figure 12).
  • the corresponding cutter head infeed angle are given in Figures 13 and 14.
  • the latter goes out of the line of the Score 16 out.
  • the width F2 of the rib 7 is at the level of the profile depth T of the screw head immersion profile larger than that of the immersion profile.
  • Edges of the flanks 13 lie in the illustrated Four ribs mainly in a common diametral D-D. Which also on this front flank 13 steeper curvature or trapezoidal flank course results from a comparison of the angles entered in FIG. 11, the Values are given there.

Landscapes

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

Claims (11)

  1. Tournevis ou embout de tournevis (S) avec une extrémité d'entraínement, une extrémité entraínée (1 ou 2) et une tige (4) intermédiaire, l'extrémité entraínée étant profilée sous la forme de nervures (7) au nombre d'au moins trois, de préférence quatre, ces nervures (7) partant radialement d'un tronçon central (8) situé autour de l'axe de rotation (x-x). en présentant chacune du côté de l'extrémité une partie frontale, placée de façon inclinée par rapport à l'axe de rotation, et constituant des flancs (13 ou 14) du côté avant et du côté arrière, qui, dans la zone voisine de la partie frontale (11), s'étendent de façon sensiblement parallèle entre eux, zone dans laquelle le flanc (13) situé du côté avant est placé sur une surface diamétrale (diamètre D-D) par rapport à l'axe de rotation (x-x), les flancs (13, 14) de nervures (7) voisines constituant une entaille (9) s'étendant en direction longitudinale, avec un fond d'entaille (16) se développant dans la surface d'enveloppe d'un tronçon de tige, caractérisé en ce que les deux flancs (13, 14) sont incurvés dans des sens opposés en partant de l'arête de bordure de la partie frontale (11) de chaque nervure (7), le flanc (13) situé du côté avant ayant une courbure autour de la direction longitudinale, comprenant une partie (13") en saillie, radialement extérieure, de la zone frontale du flanc (13).
  2. Tournevis ou embout de tournevis (S) avec une extrémité d'entraínement, une extrémité entraínée (1 ou 2) et une tige (4) intermédiaire, l'extrémité entraínée étant profilée sous la forme de nervures (7) au nombre d'au moins trois, de préférence quatre, ces nervures (7) partant radialement d'un tronçon central (8) situé autour de l'axe de rotation (x-x), en présentant chacune du côté de l'extrémité une partie frontale, placée de façon inclinée par rapport à l'axe de rotation, et constituant des flancs (13 ou 14) du côté avant et du côté arrière qui, dans la zone voisine de la partie frontale (11), s'étendent de façon sensiblement parallèle entre eux, zone dans laquelle le flanc (13) situé du côté avant est placé sur une surface diamétrale (diamètre D-D) par rapport à l'axe de rotation (x-x), les flancs (13, 14) de nervures (7) voisines constituant une entaille (9) s'étendant en direction longitudinale, avec un fond d'entaille (16) se développant dans la surface d'enveloppe d'un tronçon de tige, caractérisé en ce que les deux flancs (13, 14) de chaque nervure sont incurvés à l'opposé l'un de l'autre, de manière que l'arête de bordure d'entaille (13') tournée vers le flanc (13) situé du côté avant, soit incurvée pour la suite du flanc incurvé (13), dans la direction axiale en s'éloignant du fond d'entaille, d'un angle périphérique (alpha), plus faible que celui de l'arête de bordure d'entaille (14') du flanc (14) situé du côté arrière.
  3. Tournevis ou embout de tournevis selon la revendication 1, caractérisé en ce que l'arête de bordure d'entaille (13'), tournée vers le flanc (13) situé du côté avant, est incurvée pour la poursuite de la partie de flanc (13) à incurvation continue, sur un angle périphérique (alpha), plus faible que celui de l'arête de bordure d'entaille (14') du flanc (14) situé du côté arrière.
  4. Tournevis ou embout de tournevis selon la revendication 2 ou 3, caractérisé en ce que le flanc (13) situé du côté avant présente une incurvation supplémentaire dans la direction longitudinale, avec une partie (13") en saillie, radialement extérieure, de la zone frontale du flanc (13).
  5. Tournevis ou embout de tournevis selon la revendication 1, 3 ou 4, caractérisé en ce que le flanc (14) du côté arrière présente une incurvation supplémentaire dans la direction longitudinale, avec une partie extérieure radiale retombant de la zone frontale du flanc (14).
  6. Tournevis ou embout de tournevis selon l'une des revendications précédentes, caractérisé en ce que les deux flancs (13, 14), dans la zone frontale de chaque nervure (7), en partant d'un tronçon à flancs parallèles (7a) se raccordant directement à l'arête de bordure frontale et entrant dans le profil à pénétration (17) d'une tête (18) d'une vis (14), sont incurvés dans des directions opposées l'une de l'autre dans la direction axiale, le début (7b) de l'incurvation étant situé dans la zone de l'embouchure (21) du profil à pénétration.
  7. Tournevis ou embout de tournevis selon l'une des revendications précédentes, caractérisé en ce que le fond d'entaille (16) de chaque entaille (9) est incliné sous un angle aigu par rapport à l'axe de rotation (x-x) dans la zone frontale.
  8. Tournevis ou embout de tournevis selon l'une des revendications précédentes, caractérisé en ce que la partie frontale (11) des flancs (13, 14) constitue des parties de surface d'une enveloppe tronconique imaginaire.
  9. Tournevis ou embout de tournevis selon l'une des revendications précédentes, caractérisé en ce que le prolongement imaginaire de la projection axiale de chaque fond d'entaille (16) passe à une distance (z) de l'axe de rotation (x-x).
  10. Tournevis ou embout de tournevis selon l'une des revendications précédentes, caractérisé en ce que le fond d'entaille (16) s'étend avec des bords d'entaille (13'. 14') se coupant sous un angle aigu.
  11. Tournevis ou embout de tournevis selon l'une des revendications précédentes, caractérisé en ce que les bords d'entaille (13', 14') se coupant sous un angle d'environ 40°.
EP97952010A 1996-12-05 1997-11-29 Tournevis ou embout tournevis Expired - Lifetime EP0942807B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE29621122U 1996-12-05
DE29621122 1996-12-05
DE29715772U 1997-09-03
DE29715772U DE29715772U1 (de) 1996-12-05 1997-09-03 Schraubendreher oder Schraubendrehereinsatz
PCT/EP1997/006661 WO1998024597A1 (fr) 1996-12-05 1997-11-29 Tournevis ou embout tournevis

Publications (2)

Publication Number Publication Date
EP0942807A1 EP0942807A1 (fr) 1999-09-22
EP0942807B1 true EP0942807B1 (fr) 2000-08-23

Family

ID=26059710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97952010A Expired - Lifetime EP0942807B1 (fr) 1996-12-05 1997-11-29 Tournevis ou embout tournevis

Country Status (4)

Country Link
US (1) US6520055B1 (fr)
EP (1) EP0942807B1 (fr)
CN (1) CN1073000C (fr)
WO (1) WO1998024597A1 (fr)

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US7690282B2 (en) * 2005-08-03 2010-04-06 Synthes Usa, Llc Screw-retaining screwdriver
GB2476917B (en) 2008-11-07 2013-10-23 Milwaukee Electric Tool Corp Tool bit with curved shank
USD623036S1 (en) 2008-11-07 2010-09-07 Milwaukee Electric Tool Corporation Insert bit
USD711719S1 (en) 2009-11-06 2014-08-26 Milwaukee Electric Tool Corporation Tool bit
USD623034S1 (en) * 2009-12-18 2010-09-07 Techtronic Power Tools Technology Limited Tool arbor
USD619152S1 (en) 2009-12-18 2010-07-06 Techtronic Power Tools Technology Limited Adapter
USD646542S1 (en) 2010-09-29 2011-10-11 Milwaukee Electric Tool Corporation Accessory interface for a tool
USD651062S1 (en) 2010-09-29 2011-12-27 Milwaukee Electric Tool Corporation Tool interface for an accessory
USD653523S1 (en) 2010-09-29 2012-02-07 Milwaukee Electric Tool Corporation Adapter for a tool
US9010223B2 (en) * 2013-02-06 2015-04-21 New Way Tools Co., Ltd. Tool bit
US9555554B2 (en) 2013-05-06 2017-01-31 Milwaukee Electric Tool Corporation Oscillating multi-tool system
US10022845B2 (en) 2014-01-16 2018-07-17 Milwaukee Electric Tool Corporation Tool bit
US10780559B2 (en) * 2017-04-25 2020-09-22 William Norton Helical toothed driver and compatible fastener
USD821842S1 (en) * 2017-05-16 2018-07-03 Shao-Hsien HSU Tool bit
US11059162B2 (en) 2017-05-17 2021-07-13 Milwaukee Electric Tool Corporation Screwdriver
USD855433S1 (en) 2017-08-09 2019-08-06 Milwaukee Electric Tool Corporation Screwdriver
US11638987B2 (en) 2017-12-01 2023-05-02 Milwaukee Electric Tool Corporation Wear resistant tool bit
USD897806S1 (en) * 2018-04-30 2020-10-06 William Norton Driver
USD921468S1 (en) 2018-08-10 2021-06-08 Milwaukee Electric Tool Corporation Driver bit
USD884755S1 (en) * 2019-08-16 2020-05-19 Ali Industries, Inc. Hex driver flap wheel sander
USD880545S1 (en) * 2019-08-21 2020-04-07 Ali Industries, Inc. Hex arbor
TWI704982B (zh) * 2019-12-03 2020-09-21 鴻安國際興業有限公司 具有防滑功能的驅動工具

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US2848024A (en) * 1958-04-18 1958-08-19 Ian A Smith Screw driver with offset wings
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FR1213166A (fr) 1958-11-05 1960-03-29 Guest Keen & Nettlefolds Ltd Perfectionnements apportés aux tournevis
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US4998454A (en) * 1988-11-14 1991-03-12 Black & Decker Inc. Screwdriver bit for phillips-head fasteners

Also Published As

Publication number Publication date
EP0942807A1 (fr) 1999-09-22
WO1998024597A1 (fr) 1998-06-11
US6520055B1 (en) 2003-02-18
CN1073000C (zh) 2001-10-17
CN1245454A (zh) 2000-02-23

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