EP2098336A2 - Support pour insertions de tournevis - Google Patents

Support pour insertions de tournevis Download PDF

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Publication number
EP2098336A2
EP2098336A2 EP09154462A EP09154462A EP2098336A2 EP 2098336 A2 EP2098336 A2 EP 2098336A2 EP 09154462 A EP09154462 A EP 09154462A EP 09154462 A EP09154462 A EP 09154462A EP 2098336 A2 EP2098336 A2 EP 2098336A2
Authority
EP
European Patent Office
Prior art keywords
section
holder
outer sleeve
cross
torsion
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Withdrawn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
EP09154462A
Other languages
German (de)
English (en)
Other versions
EP2098336A3 (fr
Inventor
Horst Holland-Letz
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.)
Felo Werkzeugfabrik Holland Letz GmbH
Original Assignee
Felo Werkzeugfabrik Holland Letz GmbH
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 Felo Werkzeugfabrik Holland Letz GmbH filed Critical Felo Werkzeugfabrik Holland Letz GmbH
Publication of EP2098336A2 publication Critical patent/EP2098336A2/fr
Publication of EP2098336A3 publication Critical patent/EP2098336A3/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Withdrawn legal-status Critical Current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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0007—Connections or joints between tool parts
    • B25B23/0035—Connection means between socket or screwdriver bit and tool
    • 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

Definitions

  • the invention relates to a holder for screwdriver inserts according to the preamble of patent claim 1.
  • an elongate receiving part at one longitudinal end of a blind hole with polygonal cross-section and at the other longitudinal end a rigidly mounted drive part.
  • the blind hole serves to receive a correspondingly shaped shaft of a screwdriver bit, a so-called bit, and contains z. B. at its bottom a glued permanent magnet for holding the insert.
  • the drive member has a standard shaft for insertion into a correspondingly formed receiving opening of the drive spindle of a drive device, for.
  • the drive part can also be introduced into the usual receiving chuck of an electric or pneumatic drilling machine or the like.
  • a likewise already known device for limiting the torque in screwdrivers of this type comprises a drive part, a plug-on head for attachment to fastening parts in the form of nuts or screw heads and a shaft section arranged between the two ( DE 74 03 870 U1 ).
  • the shank portion has in this case a diameter / length ratio determined in such a way that the tightening of the fastening parts up to a preselected highest torque is possible, while tightening is prevented with a torque exceeding this torque by elastic rotation of the shaft portion.
  • Exceeding the specified torque should also be made visible by a striking rotation of the shaft portion.
  • Different tightening torques may be taken into account by providing a set of devices in which the shank portions have diameter / length ratios selected according to a plurality of standard moments occurring in practice. Such devices are essentially unsuitable for screwdrivers.
  • suitable means for torque limiting are for screwdriver and in particular for power screwdriver, to be used interchangeably in the screwdriver bits, also only partially usable for two reasons.
  • the load increases when the described devices are used the tip of the insert or on the screw in the final stages of the screwing up to the trigger torque steeply, which is why a faster wear or breakage of the tips of the screwdriver bits or screws occurs more often than usual.
  • DE 41 43 678 B4 discloses a drive member having in one end portion a transmission cross-section for a chuck of a drill or the like, while the other end portion forms a sleeve-like holding body in which a torsion bar is insertable to form a positive connection for transmitting an actuating torque.
  • the projecting from the holding body free end portion of the torsion bar finds corresponding positive reception in a non-circular recess of a receiving body.
  • the receiving body has in the end portion remote from the torsion bar a square transmission cross section. On this square transmission cross section a receiving sleeve is attached to form a rotationally fixed connection.
  • a screwdriver insert can be inserted into the receiving sleeve, wherein in the inserted position of the screwdriver insert, this can be secured by a permanent magnet, which is arranged in the receiving sleeve between the receiving part and the screwdriver insert.
  • An outer sleeve can extend from the receiving sleeve via the receiving part, a gap between the receiving part and the holding body, the torsion bar exposed in this gap to an axial portion of the holding body.
  • the torsion bar is cylindrical here and has serrations in the end regions for non-rotatable connection with the holding body and the receiving part.
  • a generic holder is off EP 0 988 134 B1 known.
  • a drive member in a transmission cross-section opposite end portion rotationally fixed receptacle in a first receiving sleeve in which a "dumbbell-shaped" Torsionsstab is also used under rotation-resistant recording.
  • a "dumbbell-shaped" Torsionsstab is also used under rotation-resistant recording.
  • the dumbbell-shaped torsion bar form the thickening of the dumbbell transmission cross-sections, on the one hand, a transmission of the drive torque from the drive part via the first receiving sleeve to the torsion bar and in the end remote from the drive part transmission of the drive torque to a second receiving sleeve.
  • An additional positive connection directly between the first receiving sleeve and the second receiving sleeve is provided when a certain degree of torsion of the torsion bar is achieved, resulting in a non-linear torsional stiffness behavior, which is approximately linear in a first portion with the torsional stiffness of the torsion bar and in a second portion is stiffer due to the parallel connection of the torsional stiffness of the torsion bar and the first receiving sleeve.
  • a screwdriver insert can be used to form a rotationally fixed connection.
  • the drive member itself is formed with a torsion portion, which in one end region finds positive reception in the second receiving sleeve.
  • the non-linearity of the torsional stiffness is brought about by the fact that between the torsion portion of the drive part on the transmission cross section for a drive-side facing side rotatably the first receiving sleeve is connected.
  • the drive part has a further transfer cross section between the torsion section and the end area coupled to the second receiving sleeve. The first receiving sleeve radially outwardly bridges the torsion portion and extends with a small circumferential clearance into the region of the aforementioned second transmission cross section.
  • the above-mentioned clearance between the further transfer cross section and the first receiving sleeve is overcome, so that a rotationally fixed connection between the further transfer cross section and the first receiving sleeve is created for a structurally predetermined extent of the torsional stress.
  • the torsional stiffness of the torsion section and the torsional stiffness of the first receiving sleeve are thus connected in parallel, resulting in a piecewise linear, progressive Torsionssteiftechniks of the holder.
  • the present invention has for its object to provide a holder for screwdriver inserts, in which the optical and mechanical properties of the Torsionsabitess are improved and / or the holder is inexpensive to produce.
  • the present invention finds use for any holder for screwdriver bits, for example according to the aforementioned prior art, in which a receiving part is provided with a receptacle which is rotatably connected to the screwdriver bit. Furthermore, the holder according to the invention has a drive member which is rotatably connected to the receiving part. In addition, a Torsionsabêt is provided, which has a torsional stiffness, which leads to a twist between a functional tip of the screwdriver insert and a coupling portion of the drive part with usually acting on the screwdriver actuating torques and operating torque peaks.
  • the torsion section it is proposed not to form a partial region of the torsion section in a cylindrical manner, but instead to make the contour profile of the torsion section curved in the direction of a longitudinal axis of the torsion section, at least in a partial region. Any curves are possible here. This results in increased design possibilities for the voltage curve in the torsion section, voltage gradients in the material, voltage peaks in the use of the holder and the resulting Torsional rigidity. Crucial importance for the design of the rigidity can hereby be the minimum cross section in the area of the curved contour.
  • the invention leads to a "soft" cushioning of high actuation torques, in particular of jerky actuation torques, as occur, for example, especially if in metal construction, a screw head touches on a hereby braced material without a sufficient elasticity of the screw and / or with the Screw is given strained material.
  • the contour runs in such a way that a decreasing cross section results in a minimal cross section with subsequent renewed enlargement of the cross section.
  • the maximum cross sections can be the same or different.
  • the torsion section with a straight outer contour that is to say a cylindrical torsion section
  • imperfections over the entire axial longitudinal region of the torsion section lead to a deviation of the stiffness behavior from the desired stiffness behavior.
  • the minimum cross section of the torsion section which represents the "softest" area of the torsion section, does not exist over the entire longitudinal area, so that for this softest area the probability of an occurrence of imperfections is relatively low. If, on the other hand, such imperfections occur away from this softest subarea, ie in an area of increased diameter, they can be compensated by excess material for the enlarged cross sections. Thus, according to the invention results in increased reliability and reduced manufacturing requirements.
  • an outer sleeve is provided, which is connected to the receiving part so that at least one axial position of the outer sleeve is secured relative to the receiving sleeve and a rotational degree of freedom is ensured.
  • the outer sleeve can have a suitable lateral surface, via which a guidance or handling of the holder is made possible or supported.
  • the contour of the outer sleeve can be suitably shaped such that a guidance of the holder is made possible by the fact that the outer sleeve between the thumb and the Index finger is aligned, guided or held.
  • the invention proposes a different training and Support the outer sleeve before: Between the torsion and the transfer cross-section, a cylindrical portion or at least a portion of circular cross-section is arranged according to the invention.
  • the outer sleeve has a partial or end region, which preferably has an annular or cylindrical inner surface.
  • the outer sleeve forms with this portion or end portion of a small gap, a play or a transition fit with the lateral surface of the cylindrical portion or the portion of circular cross section.
  • the outer sleeve has a certain protective function for the torsion section, which constitutes the "weakest area" of the drive section.
  • a kind of radial guide for the outer sleeve may be formed between the outer sleeve and the cylindrical portion.
  • a second radial guide of the outer sleeve at its other end may be given by their storage on the cylindrical outer surface of the receiving part.
  • a guide surface or a guide ring is formed between the outer sleeve and the drive part, which ensures radial and / or axial guidance and / or sealing of the outer sleeve, directly or only after overcoming a gap, without (regardless of the size of the torsion portion) To impede rotation of the outer sleeve.
  • the invention is based on the recognition that in this case, a relative movement between the fingers of the user and the receiving part or Torsionsabites occurs, resulting in rapid rotation due to the resulting Frictional heat can cause problems. Such friction-induced heating can be kept away from the user or completely avoided according to the invention.
  • the transition from the curved portion of the torsion portion to the at least one cylindrical portion there are many possibilities for the transition from the curved portion of the torsion portion to the at least one cylindrical portion.
  • a curved transition region between the cylindrical portion and the curved portion may be provided, so that the overall contour curve is smooth without a kink.
  • a transition from the curved portion to the cylindrical portion of a jump or a kind of undercut takes place.
  • the transition of the contour of the curved portion to the cylindrical portion with a kink whereby good production possibilities a good transition of the voltages between the sections is ensured.
  • the torsion portion is provided in the drive part itself, as for example for a in EP 0 988 134 B1 illustrated embodiment of the case, however, with said curved contour of the Torsionsabitess.
  • the drive part is a multifunctional component, which serves on the one hand, the introduction of the actuating torque in the holder and on the other hand, the provision of the Torsionsabitess. In this way, a particularly compact embodiment of the holder can be made possible by reducing the number of components involved, whereby the possibilities for an occurring game are reduced, if a game - unlike in EP 0 988 134 B1 - not wanted.
  • the drive part is part of a screwdriver blade for a screwdriver equipped with a holder according to the invention
  • the drive part in the end remote from the screwdriver insert has a non-circular transfer cross-section, which can be used, for example, as a square drive. or hexagonal cross section or with a cross section according to DIN 3126 is formed.
  • the drive part has in the screwdriver insert end region facing a non-circular transmission cross section, in particular a square or hexagonal cross-section, via which the rotationally fixed connection with the receiving part.
  • a particularly compact embodiment results when the torsion portion is arranged at least partially inwardly of the receiving part.
  • the torsion portion is formed with three axially successive subregions:
  • the outer contour is curved or circular-segment-shaped, with a transition to a smaller diameter of the torsion segment taking place via the curve or circular segment shape.
  • a tapered portion results in a transfer of the voltages to the smaller diameter below Avoidance of voltage peaks.
  • a subsequent partial region has approximately the same end cross-sections, between which the outer contour of this partial region runs in a curved or circular segment.
  • the diameter of this portion is approximately at the center, so that a significant influence on the torsional behavior can take place here.
  • the outer sleeve is rotatably mounted relative to the receiving part. This makes it possible that, for example between two fingers, the outer sleeve and thus the holder can be held by the user, even if the holder is in operation and rotates the receiving part as a result of a drive movement relative to the outer sleeve.
  • a screw-near guide is useful to effect a precise screwing.
  • an inner contour of the outer sleeve is basically arbitrary.
  • the outer sleeve may have a circumferential radially inwardly oriented shoulder, which forms the small gap, the play or transition fit with the lateral surface of the portion for guidance and / or sealing.
  • the invention proposes to produce the outer sleeve at least partially made of metal.
  • a particularly advantageous embodiment of the holder according to the invention results when the outer sleeve has a stepped or non-stepped inner bore.
  • the diameter of this inner bore is larger than the corner measure of at least one transmission cross-section. This makes it possible that the outer sleeve can be pushed over the transmission cross-section with the smaller Eckcuit on the drive part.
  • the outer sleeve is formed with a ring which is slotted, for example, or two - or multiple parts.
  • the slotted or multi-part ring can be inserted into the inner bore, where it occupies a fixed position.
  • the inner diameter of this ring can then form the interaction with the lateral surface of the portion in the region of the gap or the play or transition fit. This results in improved manufacturing and assembly conditions.
  • a sliding contact of the ring with the lateral surface of the cylindrical or circular portion it is also possible that over the ring also a one-sided axial support of the outer sleeve relative to the drive member by this rests on a shoulder or collar of the drive member.
  • a shoulder or collar is formed by a transition region from the cylindrical or circular portion to the immediately adjacent transmission cross section or an undercut in the transition region to this.
  • the outer sleeve on the drive part is both rotatable and axially supported on one side.
  • the outer sleeve is rotatable on the receiving part and supported on one side in the other axial direction.
  • rotational support at two axially spaced locations is possible, as a result of which tilting of the outer sleeve is reliably prevented.
  • the outer sleeve can be fixed axially by the two unilateral axial supports, or it can be given an axial clearance, which is ensured in a structurally simple manner.
  • the invention proposes that the receiving part is connected via a press fit with the drive part. This represents a particularly simple and inexpensive assembly technique.
  • the entire lateral surface or only one or more subsections of the sleeve can be provided with the color, different colors being selected for outer sleeves of holders having different characteristic properties. It is understood that such a colored marking can also exist in a kind of point, a ring or similar colored partial surfaces of the lateral surface of the outer sleeve.
  • the characteristic properties of the holder characterized by the marking are, for example, a length of the holder, a torsional rigidity of the holder and / or the torsion portion of the holder and / or an identification of a screwdriver insert preferably to be operated with the holder. If a set of holders with different markings is offered, for example as a kind of unit or cassette for the installer, the user can select the holder which is advantageous for the respective intended use on the basis of the marking.
  • the outer sleeve is sprayed onto the receiving part, the torsion portion and / or the lateral surface of the cylindrical portion or the portion with a circular cross-section. While for a separate production of the outer sleeve in an injection molding inserting a core would be required in a mold for setting an inner contour, such a core can be made unnecessary by the inventive design, since the inner contour through the receiving part, the torsion, the lateral surface of the cylindrical portion and / or the portion is limited with a circular cross-section.
  • the invention proposes in addition, that prior to spraying the material of the outer sleeve the receiving part, the torsion portion and / or the lateral surface of the cylindrical portion or the portion of circular cross section is / are coated with a release agent.
  • a silicone release agent can be applied to said parts, which prevents formation of the material connection.
  • a release agent can be sprayed in particular as a liquid release agent. It is also possible that a solid coating is formed by the release agent. This may be a solid non-stick agent, in particular in the form of titanium nitrite.
  • Fig. 1 shows a drive part 1 with end portions 2, 3.
  • the end portions 2, 3 form transmission cross-sections 4, 5, via which the drive member 1 in rotatable connection with adjacent components can be brought.
  • the transmission cross-section 4 serves for indirectly transmitting an actuating torque to a screwdriver bit 6, while the transmission cross-section 5 serves for the non-rotatable connection with a chuck of a suitable actuating tool.
  • the transmission cross sections 4, 5 are formed with hexagonal cross sections, in which case the transmission cross section 5 is designed as a transmission cross section according to DIN 3126-6.3. Between the transfer sections 4, 5, a torsion section 7 is formed. Adjacent to the transfer sections 4, 5, the torsion section 7 is formed in each case with a cylindrical subregion 8, 9.
  • the transition from the transfer cross sections 4, 5 to the subregions 8, 9 takes place via a suitable transition contour with a step, an undercut, a continuous transition or the like.
  • the diameter of the subregions 8, 9 corresponds to the minimum radial dimension of the transition cross sections 4, 5.
  • the transmission cross sections 4, 5 and the subregions 8, 9 are formed with the same cross sections. Between the cylindrical portions 8, 9, a portion 10 is arranged, whose outer contour is curved with a curve 12 is formed. A transition from the subregions 8, 9 to the subregion 10 takes place in each case with a bend 13, 14 of the contour.
  • the geometry of the drive part 1 is preferably as follows: Transmission cross section 4: Hexagonal profile with 6.3 mm Diameter of subarea 8: 6,30 mm Curvature of the contour 11: Radius 160 mm Minimum diameter of the partial area 10 in the middle between the partial areas 8, 9: 6 mm Diameter of subarea 9: 6.3 mm
  • Transfer cross section 5 Shank DIN 3126-6,3 Length of transfer section 4: 8 mm Length of section 8: 5 mm Length of section 10: 14 mm Length of section 9: 5 mm Length of the transfer section 5: 25 mm Total length of the drive part 1: 56 mm
  • Fig. 2 is different Fig. 1 , with otherwise corresponding basic design, between the sub-area 10a and the sub-areas 8a and 9a a tapered portion 15a and an extended portion 16a interposed.
  • the subregions 15a, 16a ensure that the contour between the subregion 10a and the subregions 8a and 9a extends without cracks, only with creases 17a, 18a, 19a, 20a.
  • the contour of the subregions 15a, 16a is curved, in particular part-circular.
  • the geometry of the drive part 1a is preferably as follows: Transfer cross-section 4a: Hexagonal profile with 6.3 mm Diameter of the subarea 8a: 6 mm Curvature of the contour 11a: Radius 180 mm Minimum diameter of the partial area 10a in the middle between the partial areas 8a, 9a: 4.6 mm Diameter of the portion 9a: 6.3 mm Transmission cross section 5a: Shank DIN 3126-6,3 Length of transfer section 4a: 7 mm Length of section 8a: 2 mm Length of section 10a: 13.1 mm Length of subarea 9a: 2 mm Length of the transfer section 5a: 25 mm Overall length of the drive part 1a: 56 mm Radius of the contour of the tapered portion 15a: 10 mm Minimum diameter of the portion 15a in the region of the bend 18a: 4.75 mm Length of the subarea 15a: 3.2 mm Radius of the contour of the partial area 16a: 10 mm Minimum diameter of the portion 16a in
  • Fig. 3 shows an alternative embodiment of a drive part 1b with changed geometric relationships:
  • the geometry of the drive part 1 b is preferably as follows: Transmission cross section 4b: Hexagonal profile with 6.3 mm Diameter of subarea 8b: 4.5 mm Curvature of the contour 11b: Radius 180 mm Minimum diameter of the partial area 10b in the middle between the partial areas 8b, 9b: 3 mm Diameter of the subarea 9b: 6.3 mm Transmission cross section 5b: Shank DIN 3126-6,3 Length of transfer section 4b: 9 mm Length subarea 8b: 3 mm Length of section 10b: 6,10 mm Length of subarea 9b: 2 mm Length of the transmission cross section 5b: 25 mm Overall length of the drive part 1b: 56 mm Radius of the contour of the tapered portion 15b: 15 mm Minimum diameter of the portion 15b in the region of the bend 18b: 3.03 mm Length of subarea 15b: 4.45 mm Radius of the contour of the subarea 16b: 15 mm Minimum diameter of the portion 16b in
  • FIGS. 4 and 5 show an exemplary embodiment of a holder 21 in which the drive parts 1, 1a, 1b can be used as interchangeable components 22, 23, 24 use.
  • the transfer section 4 of the drive member 1 is rotatably receiving in a receiving part 25, in which the drive member 1 is inserted to a stop, whereby a preferably secure operating position between the receiving part 25 and the drive part 1 is formed.
  • On the opposite side is releasably inserted into the receiving part 25 of the screwdriver bit 6, wherein the insertion also takes place here preferably up to a stop and a backup of the screwdriver bit 6 against accidental falling out of the same takes place from the receiving part 25.
  • the receiving part 25 is in the form of a receiving sleeve formed with a continuous recess, whose cross section is out of round to form a circumferentially positive receptacle for a transmission cross section of the screwdriver bit 6 on the one hand and the transmission cross section 4 of the drive part on the other.
  • a disk-like permanent magnet 26 is disposed approximately centrally in the receiving part 25 in the recess, wherein the permanent magnet 26 is fixedly connected to the receiving part 25, for example by gluing.
  • the permanent magnet 26 forms the stops to limit the insertion of drive part 1 and screwdriver bit 6, wherein by the magnetic forces of the permanent magnet 26 is a fuse of the screwdriver bit 6 in the illustrated operating position.
  • the position of the permanent magnet 26 is selected such that the receiving part 25 covers substantially the entire transmission cross section 4 of the drive part 1. It is also possible that the drive part 1 is pressed firmly in the sub-region 8 in the receiving part 25 or otherwise rotationally fixed and axially secured connected thereto.
  • An outer sleeve 27 has a stepped continuous inner bore, in the extended portion of the receiving part 25 is recording.
  • the connection between outer sleeve 27 and receiving part 25 takes place in such a way that at least the axial position of the outer sleeve 27 is secured relative to the receiving part 25. It can remain a rotational degree of freedom of the outer sleeve 27 relative to the receiving part 25 or this is eliminated by a suitable connection between the outer sleeve 27 and receiving part 25.
  • the outer sleeve 27 extends in the direction of the transfer cross section 5 of the drive part 1 to the subregion 9. Between the outer sleeve 27 and the torsion 7 remains an annular space 28.
  • the outer sleeve 27 has a circumferential radially inwardly oriented shoulder 29th which has the smallest possible gap, a play or transition fit with the lateral surface of the portion 9 is formed.
  • the portion 9 and the paragraph 29 are formed with non-circular, corresponding cross-sections, so that immediately or after overcoming a game parallel connection of a torsional stiffness of the torsion 7 is given to the torsional stiffness of the outer sleeve 27, see.
  • EP 0 988 134 B1 The receiving part 25 forms a receptacle 31 for rotatably receiving the screwdriver bit.
  • Another receptacle 32 serves a rotationally fixed operative connection with the transfer cross-section 4 of the drive part 1.
  • the outer sleeve 27 is advantageously made of plastic and engages resiliently auffedernd with an inner annular bead 33 in a corresponding annular groove in the receiving part 25 a. But the connection by annular bead 33 and annular groove can also be omitted.
  • the outer sleeve 27 can also be applied in such a way that it is sprayed by injection molding on the mounted holder. Since the sleeve then rests only on rotationally symmetrical parts, no positive connection is given and the friction alone changes the torsional rigidity little.
  • holder 21 can also for other embodiments of the drive part 1, for example. According to DIN 3126 or other connection forms, z. B. with thread, be formed.
  • a set of holders according to the invention consists of a proposal of several, in particular 3 or 4, holders with different torsional stiffnesses.
  • the assignment of the individual holders to specific torsion ranges or to sizes of functional tips of the screwdriver inserts is indicated by an identification of the outer sleeve 27, in particular the color of the same or a color ring.
  • the kit may be arranged in a cassette for the customer and user.
  • the torsional stiffness of the holder can not be recognized in the geometry of the torsion 7 because it is covered by the outer sleeve 27, the color of the outer sleeve 27 is an identification of the torsional stiffness and assignment of the holder, for example Phillips screws of sizes 1, 2 or 3 or Torx screws in a certain size range.
  • a unit 30, which is formed with an outer sleeve 27, the receiving part 25 and the permanent magnet 26 is selectively used with pairs of a screwdriver bit 6 and a drive part 1.
  • Each such pair a screwdriver insert 6 and a drive part 1 is adapted for operating different types of screws, for example, the tread depth and / or the profile of a functional tip of the screwdriver bit 6 of such a pair is adapted to the resulting torsional stiffness of the torsion portion 7 of the drive part 1 of this pair.
  • the screwdriver bit may be formed in two pieces, for example, according to the embodiments and the manufacturing method described in the publications of the applicant DE 103 49 415.4-15 .
  • DE 103 62 089.3-15 and DE 101 44 990.9 are described.
  • the transition fit or clearance fit between the receiving sleeve 27 and the cylindrical surface 35 of the portion 9 formed with a ring 41 which is formed in two parts with two half-ring segments 37, 38 and inserted into an end cross-sectional enlargement 39 of an inner bore 40 and fixed there is, for example via a material connection and / or pressing the ring 41.
  • a gap 36 or a play or transition fit is formed between the inner bore of the ring 41 and the lateral surface 35 of the portion 9.
  • the outer sleeve 27 has a further cross-sectional widening 42 with a cylindrical inner surface, in which the receiving part 25 with a cylindrical lateral surface is accommodated, forming a radial gap 43, a transition or clearance fit.
  • a shoulder 44 in the transition region from the cross-sectional widening 42 to the inner bore 40 forms an axial gap 45 with the associated end face of the receiving part 25.
  • the outer end face of the ring 41 forms a further axial gap 46 with a shoulder 47, which is formed by the cross-sectional widening in the transition region from the cylindrical portion 9 to the transfer section 5.
  • the outer sleeve 27 is due to the transition fits, the clearance fits or radial gaps 36, 43 rotatable relative to the rotationally fixed connected unit, which is formed with the screwdriver bit 6, the receiving part 25 and the drive part 1 while ensuring only limited tilting. Furthermore, the outer sleeve 27 is limited axially displaceable with a shift degree of freedom, which is limited to the sum of the axial column 45, 46. Of course, the axial gaps 45, 46 can be omitted to form an axial play or transition fit.
  • the outer sleeve 27 is rotatably mounted on the cylindrical portion 9 and secured in the axial direction, the ring 41 is inserted with the two half-ring segments 37, 38 between the outer sleeve 27 and the cylindrical portion 9.
  • the ring 41 is manufactured with a plastic with bearing properties by injection molding. The ring encloses the cylindrical portion 9 with the radial gap 36 and abuts the shoulder 47 in the axial direction.
  • the drive member 1 is pressed with the receiving part 25, wherein the receiving part 25 is pushed so far on the transfer section 4 until the desired axial column 45, 46 are present.
  • An equipment of the drive part 1 with the cylindrical portion 8 is optional, for example, depending on the desired length of the Torsionsabitess 7 and the holder. 1
  • Fig. 12 shows a further embodiment of a holder according to the invention, which does not have a cylindrical portion 8. Rather, a transition from the transfer section 4 to the contour 11 takes place here directly. Whether a cylindrical subregion 8 is to be provided depends on the desired longitudinal extent of the drive part 1 and ultimately of the holder 21, the desired geometries and the required torsional rigidity.
  • Fig. 13 shows an embodiment of a holder 21 according to the invention, in which the outer sleeve 27 is sprayed onto the outer sleeve 25 (with drive part 1 arranged therein) and the drive part 1.
  • the receiving part 25 is inserted with the drive part 1 inserted therein, possibly also with a permanent magnet 26 disposed therein, in a form the cavity of the shape of in Fig. 13 shown outer contour 48 of the outer sleeve 27 corresponds.
  • the material enters constrictions, which are formed in particular in the transition region from the transfer section 5 to the sub-area 9 and / or from the receiving part 25 and / or the transfer section 4 to the sub-area 8 and corresponding constrictions of the torsion 7, whereby the outer sleeve 27 is axially secured.
  • a release agent or a separating coating may be used between the outer sleeve and the adjacent components.
  • FIG. 14 a further embodiment of a holder 21, which basically according to the embodiment according to Fig. 12 is formed, but is distributed and / or used without the use of the outer sleeve 27. Accordingly, of course, all other disclosed embodiments of a holder according to the invention can be used without an outer sleeve 27, whereby in particular the variety of components can be reduced and / or costs can be reduced , It is advantageous if with the same configuration of the receiving part 25, the permanent magnet 26 and the drive part 1 on the one hand holders are sold, which are equipped with an outer sleeve 27, and on the other hand holders are sold without an outer sleeve 27th

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Clamps And Clips (AREA)
EP09154462A 2008-03-05 2009-03-05 Support pour insertions de tournevis Withdrawn EP2098336A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008012658 2008-03-05

Publications (2)

Publication Number Publication Date
EP2098336A2 true EP2098336A2 (fr) 2009-09-09
EP2098336A3 EP2098336A3 (fr) 2011-10-05

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EP09154462A Withdrawn EP2098336A3 (fr) 2008-03-05 2009-03-05 Support pour insertions de tournevis

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EP (1) EP2098336A3 (fr)

Cited By (10)

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WO2012049079A1 (fr) * 2010-10-15 2012-04-19 Wera - Werk Hermann Werner Gmbh & Co. Kg Dispositif de transmission de couple de rotation en particulier sous la forme d'un mandrin de serrage pour mèches
WO2012049078A1 (fr) * 2010-10-15 2012-04-19 Wera - Werk Hermann Werner Gmbh & Co. Kg Dispositif de transmission de couple de rotation à utiliser avec une clé à chocs
EP2471485A1 (fr) * 2010-12-28 2012-07-04 Straumann Holding AG Adaptateur de transmission dýun moment de torsion sur l'élément de montage dýun implant dentaire
US8955418B2 (en) 2013-03-08 2015-02-17 Black & Decker Inc. Threaded fastener driving tool
WO2014019907A3 (fr) * 2012-07-31 2015-02-19 Hilti Aktiengesellschaft Barre de torsion
DE102014208050A1 (de) * 2014-04-29 2015-10-29 Siemens Aktiengesellschaft Schrauberklinge, Schrauber und Verfahren zum selbständigen Einfädeln einer Schrauberklinge
US11235448B1 (en) 2020-09-08 2022-02-01 Apex Brands, Inc. Overload protected impact driving device
US11364606B2 (en) 2020-03-18 2022-06-21 Apex Brands, Inc Radial band wedge impact driving device
US11491554B2 (en) 2019-07-18 2022-11-08 Apex Brands, Inc. Compact flexible impact bit holder
US11583989B2 (en) 2020-04-03 2023-02-21 Apex Brands, Inc. Multi-start threaded impact driving device

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US3744350A (en) 1971-03-11 1973-07-10 Raff Analytic Study Ass Inc Impact wrench torque limiting device
DE7403870U (de) 1973-12-14 1974-05-30 Irvator Ab Momentenwerkzeug, besonders Momentenaufsteckschlüssel
DE2427352A1 (de) 1974-06-06 1975-12-18 Ulrich Schmidt Vorsatzschraubendreher
DE3437083A1 (de) 1984-10-05 1986-04-17 Horst-Günter 1000 Berlin Rißmann Werkzeug, insbesondere schraubenwerkzeug mit begrenzt uebertragbarem drehmoment
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DE69415348T2 (de) 1994-01-26 1999-04-29 Vermont American Corp., Louisville, Ky. Schraubendreheinsatz für den gebrauch mit einem elektrischen schraubenzieher
EP1004284A2 (fr) 1998-11-23 2000-05-31 Johnson & Johnson Professional, Inc. Système d'entraínement modulaire médical avec limitation de couple
EP0988134B1 (fr) 1997-06-02 2002-01-09 WERA WERK HERMANN WERNER GMBH & CO. Mandrin de serrage pour embouts ou autres
DE10144990A1 (de) 2001-03-06 2003-02-27 Holland Letz Felo Werkzeug Schraubendreher-Einsätze und -Schäfte
DE20313373U1 (de) 2003-08-28 2003-11-20 Lntool Industrial Co., Ltd., Taichung Druckluftwerkzeugzubehör
DE4143678B4 (de) 1991-02-27 2005-03-10 Holland Letz Felo Werkzeug Halter für Schraubendreher-Einsätze
DE10349415A1 (de) 2003-10-21 2005-06-16 Felo-Werkzeugfabrik Holland-Letz Gmbh Schraubendreher-Einsätze und Verfahren zu deren Herstellung
WO2006044423A2 (fr) 2004-10-12 2006-04-27 Pilling Weck Incorporated Outil a main rotatif comprenant une unite de commande de couple et procede associe

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DE19804081B4 (de) * 1997-06-02 2014-01-02 Wera-Werk Hermann Werner Gmbh & Co. Kg Spannfutter für Bits oder dergleichen
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DE20001865U1 (de) * 2000-02-03 2000-03-30 Willi Hahn GmbH & Co KG, 78136 Schonach Spannfutter für Werkzeugeinsätze, insbesondere Schraubendreherbits

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US2409385A (en) 1943-03-26 1946-10-15 Clarence B Pletcher Coupling
DE853280C (de) 1946-01-31 1952-10-23 Chicago Pneumatic Tool Co Durch Motor angetriebener Schlagschraubenschluessel mit einem zum Fassen der Schraube od. dgl. dienenden Werkzeugkopf und mit einer Schlagkupplung
US3744350A (en) 1971-03-11 1973-07-10 Raff Analytic Study Ass Inc Impact wrench torque limiting device
DE7403870U (de) 1973-12-14 1974-05-30 Irvator Ab Momentenwerkzeug, besonders Momentenaufsteckschlüssel
DE2427352A1 (de) 1974-06-06 1975-12-18 Ulrich Schmidt Vorsatzschraubendreher
DE3437083A1 (de) 1984-10-05 1986-04-17 Horst-Günter 1000 Berlin Rißmann Werkzeug, insbesondere schraubenwerkzeug mit begrenzt uebertragbarem drehmoment
DE3443072A1 (de) 1984-11-26 1986-05-28 Rudolf Dipl.-Ing. Höpfner (FH), 8500 Nürnberg Drehmomentbegrenzer
DE4143678B4 (de) 1991-02-27 2005-03-10 Holland Letz Felo Werkzeug Halter für Schraubendreher-Einsätze
DE69415348T2 (de) 1994-01-26 1999-04-29 Vermont American Corp., Louisville, Ky. Schraubendreheinsatz für den gebrauch mit einem elektrischen schraubenzieher
EP0988134B1 (fr) 1997-06-02 2002-01-09 WERA WERK HERMANN WERNER GMBH & CO. Mandrin de serrage pour embouts ou autres
EP1004284A2 (fr) 1998-11-23 2000-05-31 Johnson & Johnson Professional, Inc. Système d'entraínement modulaire médical avec limitation de couple
DE10144990A1 (de) 2001-03-06 2003-02-27 Holland Letz Felo Werkzeug Schraubendreher-Einsätze und -Schäfte
DE20313373U1 (de) 2003-08-28 2003-11-20 Lntool Industrial Co., Ltd., Taichung Druckluftwerkzeugzubehör
DE10349415A1 (de) 2003-10-21 2005-06-16 Felo-Werkzeugfabrik Holland-Letz Gmbh Schraubendreher-Einsätze und Verfahren zu deren Herstellung
WO2006044423A2 (fr) 2004-10-12 2006-04-27 Pilling Weck Incorporated Outil a main rotatif comprenant une unite de commande de couple et procede associe

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012049079A1 (fr) * 2010-10-15 2012-04-19 Wera - Werk Hermann Werner Gmbh & Co. Kg Dispositif de transmission de couple de rotation en particulier sous la forme d'un mandrin de serrage pour mèches
WO2012049078A1 (fr) * 2010-10-15 2012-04-19 Wera - Werk Hermann Werner Gmbh & Co. Kg Dispositif de transmission de couple de rotation à utiliser avec une clé à chocs
EP2471485A1 (fr) * 2010-12-28 2012-07-04 Straumann Holding AG Adaptateur de transmission dýun moment de torsion sur l'élément de montage dýun implant dentaire
WO2014019907A3 (fr) * 2012-07-31 2015-02-19 Hilti Aktiengesellschaft Barre de torsion
CN104582905A (zh) * 2012-07-31 2015-04-29 喜利得股份公司 扭力棒
JP2015524751A (ja) * 2012-07-31 2015-08-27 ヒルティ アクチエンゲゼルシャフト トーションバー
US8955418B2 (en) 2013-03-08 2015-02-17 Black & Decker Inc. Threaded fastener driving tool
DE102014208050A1 (de) * 2014-04-29 2015-10-29 Siemens Aktiengesellschaft Schrauberklinge, Schrauber und Verfahren zum selbständigen Einfädeln einer Schrauberklinge
US11491554B2 (en) 2019-07-18 2022-11-08 Apex Brands, Inc. Compact flexible impact bit holder
US11364606B2 (en) 2020-03-18 2022-06-21 Apex Brands, Inc Radial band wedge impact driving device
US11583989B2 (en) 2020-04-03 2023-02-21 Apex Brands, Inc. Multi-start threaded impact driving device
US11235448B1 (en) 2020-09-08 2022-02-01 Apex Brands, Inc. Overload protected impact driving device

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