EP1260319A2 - Dispositif à visser pour des embouts de tournevis - Google Patents

Dispositif à visser pour des embouts de tournevis Download PDF

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Publication number
EP1260319A2
EP1260319A2 EP02010975A EP02010975A EP1260319A2 EP 1260319 A2 EP1260319 A2 EP 1260319A2 EP 02010975 A EP02010975 A EP 02010975A EP 02010975 A EP02010975 A EP 02010975A EP 1260319 A2 EP1260319 A2 EP 1260319A2
Authority
EP
European Patent Office
Prior art keywords
sleeve
outer sleeve
screwing device
profile
permanent magnet
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
EP02010975A
Other languages
German (de)
English (en)
Other versions
EP1260319A3 (fr
EP1260319B1 (fr
Inventor
Martin 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
Priority claimed from DE10148943A external-priority patent/DE10148943B4/de
Application filed by Felo Werkzeugfabrik Holland Letz GmbH filed Critical Felo Werkzeugfabrik Holland Letz GmbH
Publication of EP1260319A2 publication Critical patent/EP1260319A2/fr
Publication of EP1260319A3 publication Critical patent/EP1260319A3/fr
Application granted granted Critical
Publication of EP1260319B1 publication Critical patent/EP1260319B1/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
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/02—Arrangements for handling screws or nuts
    • B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
    • B25B23/12—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using magnetic means

Definitions

  • the invention relates to a screw device in the preamble of claim 1 specified genus.
  • a known screwing device of this type (e.g. US Pat. No. 5,724,873) has a Drive shaft, which at one end in a receiving chuck or a plug device Power wrench, e.g. B. an electric screwdriver, is used at the other end with a Provide receptacle, interchangeably inserted in the screwdriver bits become.
  • Power wrench e.g. B. an electric screwdriver
  • the drive shaft and the end sections of the bits usually have Hexagon external cross-sections and the corresponding inner profiles.
  • the screw is magnetic against the large magnetic force conductive disc pulled, but there is a full contact of the profile tip of the Screwdriver insert in the inner profile of the screw head only if the depth of the Receiving opening in the receiving sleeve, the length of the screwdriver bit and the Thickness of the magnetically conductive disc are adjusted so that the length of the Washer excellent profile tip exactly the depth of the inner profile of the screw head equivalent.
  • screws with the same inner profile for example cross recess Phillips (PH) 2, whose heads are different in height with different screw sizes, accordingly the cross recess inner profile is of different depths.
  • the internal profile of the screws varies in depth due to manufacturing tolerances and widths, and also the length of the screwdriver bits and the tip profiles are subject to certain manufacturing tolerances.
  • the axial position of the screwdriver insert to the contact surface of the disc cannot be changed, accordingly the length of the protruding profile tip.
  • the Screw head rests on the face of the magnetically conductive disc, but that The tip profile does not lie completely over the inner profile of the screw. This will make it The tip profile is particularly stressed at its edges, which leads to a relatively fast Wear of the profile leads and the entire screwdriver insert are replaced got to.
  • the entire top profile lies in the inner profile of the Screw on, but there is no gap-free contact of the screw heads on the front of the magnetically conductive disc reached.
  • the magnetic field acting on the screw and thus the tightening force is therefore weaker.
  • a further screwing device is the one mentioned at the beginning Genre known (DE 199 07 837 A1), in which the second, annular Permanent magnet is attached to the front end of an outer sleeve that has an internal thread has and on a corresponding external thread section of the receiving or Twisted inner sleeve and thus axially adjusted relative to the screwdriver insert can be.
  • This is to ensure that both the profile of the profile tip full-surface contact with the inner profile of the screw head as well as the end surface of the screw head for gap-free contact with the ring-shaped permanent magnet formed contact surface can be brought.
  • Such settings are, however for practical applications, e.g. B. when screwing in one after the other Many screws, too time consuming and therefore hardly usable.
  • the compression spring pushes the guide sleeve forward until it is Shoulder rests on a ring which is arranged inside the holder and with the Intermediate piece is connected.
  • the screw is not at the profile tip of the screwdriver insert centered because this stands back from the end face of the ring magnet and the guide sleeve with the ring magnet is only pushed back when the end face the guide sleeve on the surface into which the screw is screwed.
  • the screw must be put by hand into the head Guide sleeve inserted and attached to the profile tip of the screwdriver bit become.
  • Screwing device shows a screwdriver insert with a larger shaft Diameter and a reduced diameter tip on which a spacer sleeve is attached, which is provided on both ends with ring magnets.
  • the shaft goes over one step up into the top.
  • the length of the spacer sleeve, along with the ring magnets is dimensioned such that the profile of the screwdriver tip is in contact with the back of the step on a length such that when the screw is placed between the screw head and the front end of the spacer sleeve remains a gap (g).
  • the screw head is pulled by the ring magnet against the profile tip of the screwdriver bit, however, there is an additional axial alignment of the screw to the axis of the screwdriver insert when attaching the screw not because the screw head with its Head surface is not in contact with the end face of the ring magnet. This can lead to the The screw is at an angle to the axis of the screwdriver bit.
  • two rubber rings are installed inside, the dimensions of which are so the diameter of the shaft of the tip is matched by the rubber rings Tension between the circumference of the shaft of the tip and the jacket of the spacer sleeve is effected.
  • the spacer sleeve is preselected axial position held on the shaft of the tip.
  • this situation should be such that on the one hand the head of the screw rests on the face of the front ring magnet, on the other hand with the inner profile on the profile of the tip of the screwdriver bit.
  • a such a preselected position would correspond to the position as with the "screwing tool magnetic bearing surface "is set according to DE 199 07 837 A1 automatic compensation between tolerances in the inner profile and outer profile of the Screwdriver tip is not possible.
  • the friction caused by the rubber rings on the Shank is greater than the attraction of the ring magnets on the screw head. If at corresponding tolerance between the profile tip and the inner profile of the screw both do not rest on the full surface, the screw can not by the force of the ring magnets Profile tip can be used until the profiles are completely in place.
  • US 3,707,894 describes a device in which concentric sleeves are attached and this by radially arranged screws in a preselected position to the tip of the Screwdriver insert can be fixed. There is at least one between the sleeves sleeve-like magnet arranged.
  • the screw head dips into one spherical recess on the end face of the inner sleeve and lies on the surface of the Formation.
  • the tip of the bit engages in the inner profile of the screw head on.
  • the sleeves are fixed on the screwdriver insert in a preselected position so that the profile of the tip of the screwdriver bit to the inside profile of the screw head assumes a fixed position, but does not automatically compensate for tolerances is possible.
  • the function of this device thus corresponds essentially to that Device according to DE 199 07 837 A1.
  • Magnetic Tools devices are known in which essentially a plate-shaped magnetic material is rolled into a cylindrical sleeve and is arranged concentrically between an inner sleeve and an outer sleeve made of steel.
  • the outer sleeve has an inner profile at its front opening for receiving a hexagon screw - or nut -, the inner sleeve and the magnetic intermediate layer are set back with respect to the front edge of the outer sleeve.
  • a screw or nut immersed in the inner profile is held there by the magnetic field.
  • This device is placed on a drive device, for example a handle for socket heads.
  • a drive device for example a handle for socket heads.
  • the device is plugged onto a screwdriver insert.
  • the front edges of the outer and inner sleeves are in one plane, the magnetic material arranged between them is set back slightly from the edges.
  • the head surface of a screw should rest on the edges of the two sleeves and be held by the magnetic field.
  • Inner sleeve, magnetic interlayer and outer sleeve form a solid unit.
  • the device is held on the shaft of the screwdriver insert by two spring washers which grip around the shaft of the screwdriver insert or snap into a groove in the shaft.
  • 3,707,894 is that the elastic magnetic material provided develops a relatively weak magnetic force, in particular if the length of the magnetic intermediate layer is as short as it should be when the device is open a standard short screwdriver insert with a length of 25 mm is to be attached.
  • the attraction only acts on its front side, but not in the direction of the rear shaft part of the screwdriver bit.
  • the inner sleeve is seated, Magnetic sleeve and outer sleeve as a unit on the shaft of a long screwdriver bit.
  • a coil spring inside the device is supported on the one hand Spring washer, which is embedded in a groove in the screwdriver shaft, on the other hand on one Ring that is mounted at the rear end of the inner sleeve.
  • the device is made by the between the rings biased spring in a certain position to the profile tip of the Brought screwdriver insert.
  • the screw is in an opening on the front of the Device used and lies on the edge of the inner sleeve.
  • a disadvantage of the known devices is that the end components continue to expand turn when the device with the screw adhering to the end face on a Touches the surface and damages it by turning the front components further becomes.
  • the invention has the advantage that a precise adjustment of the outer sleeve on the No inner sleeve by means of a screw thread or radially arranged screws is required. Due to the essentially free axial displacement of the outer sleeve the inner sleeve and a corresponding arrangement and dimensioning of the different Rather, parts is achieved that the desired settings when approaching the Obtain screw heads to the front of the screw device by itself.
  • a screwing device does not contain one from one Receiving or inner sleeve 1 made of ferromagnetic material with a hexagonal inner cross section.
  • Receiving or inner sleeve 1 made of ferromagnetic material with a hexagonal inner cross section.
  • drive shaft 2 which also is axially fixed in the inner sleeve 1.
  • the front part of the inner sleeve 1 is used for Image of a screwdriver bit made of a ferromagnetic material 3, the rear portion of which is positively in the direction of rotation in the inner sleeve 1 matching hexagon outer cross section and on the front with one Profile tip 3a is provided.
  • the insert 3 is axially z. B. with a snap ring 5 in the Secured inner sleeve 1, which engages in corresponding annular grooves of both parts.
  • the inner sleeve 1 On the inner sleeve 1 is made of a non-ferromagnetic material Outer sleeve 6 axially slidably guided, the one on the inner sleeve 1 axially outstanding front side with an opening 7a inserted into it having permanent magnets 7 (ring magnets) projecting axially beyond the inner sleeve 1 is provided.
  • the permanent magnet 7 is preferably in the front end of the outer sleeve 6 used that he with an end face 7b slightly over the front protrudes, and by gluing or otherwise firmly connected to the outer sleeve 6.
  • the internal cross section of the opening 7a is preferably somewhat smaller than that External cross section of the inner sleeve 1.
  • the opening 7a of the permanent magnet 7 is arranged approximately in a central region of the profile tip 3a of the insert 3 and preferably in such a way that the permanent magnet 7 abuts at the front end of the inner sleeve 1 or at the front end of the spacer sleeve 8 abutting against it.
  • This position is achieved because the magnetic force field of the permanent magnet 7 attracts the solid part of the insert 3, which has the hexagonal cross section, more strongly than the profile tip 3 a, which has a considerably smaller cross section and is surrounded by an air gap.
  • the freely movable outer sleeve 6 is automatically moved in the direction of the drive shaft 2 until the permanent magnet 7 strikes the front end of the inner sleeve 1 or the spacer sleeve 8.
  • the axial length of the inner sleeve 1 and the permanent magnet 7, the axial length of which is preferably less than that of the profile tip 3a it is also achieved that the profile tip 3a protrudes forward in this preselected position by as much as the prescribed surface 7b Immersion depth in the associated inner profile of the screws 4 plus a preselected tolerance dimension s in Fig. 1 corresponds.
  • This tolerance dimension s is chosen so that - as long as the outer sleeve 6 assumes the preselected position shown in FIG. 1 - on the one hand the profile tip 3a, taking into account the different head heights of the screws provided for processing with the device, always up to the positive contact in the inner profile of the screw heads 4a can penetrate, on the other hand, after reaching this prescribed immersion depth between the end faces 4b of the screw heads 4a and the contact surface 7b, a small air gap remains.
  • the arrangement according to the invention has the result that it is automatically transferred from the position shown in FIG. 1 to the position shown in FIG.
  • the attraction force of the permanent magnet 7 continues to act more strongly on the solid shaft section of the insert 3 lying in full contact in the inner sleeve 1 than on the profile tip 3a with the seated screw, that is to say a contractive force between the permanent magnet 7 and the Behind section of the insert 3 acts, the result is that the outer sleeve 6 with the permanent magnet 7 and the adhering screw head 4a until the immersion and stop of the profile tip 3a of the screwdriver insert 3 is used in the inner profile of the screw head 4a.
  • the attractive force of the magnetic field continues to act strongly in the direction of the shaft section, so that the screw 4 is held firmly on the profile tip 3a.
  • FIGS. 1 and 2 are the same parts with the same reference numerals Mistake.
  • the only difference to FIGS. 1 and 2 is that the insert 3 does not pass through the snap ring 5, but by a rod-shaped or disk-shaped second permanent magnet 9 is held in the inner sleeve 1.
  • the permanent magnet 9 is, for. B. on the Insert facing end face of the drive shaft 2 arranged by gluing or otherwise connected to this and provided with an outer cross section that the External cross section of the drive shaft 2 corresponds.
  • the power is second Permanent magnets 9 to be selected so that the insert 3 is securely in the inner sleeve 1 is held, but this does not significantly impair the use of FIGS. 1 and 2 described function occurs.
  • Outer sleeve 10 in which again the same parts with the same 1 and 2 is a two-part instead of a one-part Outer sleeve 10 is provided.
  • the outer sleeve 10 contains a permanent magnet 7 load-bearing front section 10a and a rear section 10b with a radially inward projecting approach 10c is provided, which protrudes through a middle, from the drive shaft 2 Breakthrough with an inner cross section that is smaller than the outer cross section of the Inner sleeve 1 is d.
  • the approach 10c corresponds to the approach 6a in FIGS. 1 to 4.
  • the front section 10a and the rear section 10b are also used to produce an axial Connection certain locking means 11 and 12, 14 provided.
  • the latching means 11 from an annular groove formed in the outer jacket of the front section 10a, while the locking means 12, 14 at least one axially forward from the rear portion 10b extended, resilient tongue 12 and one attached to the front end, radially inward protruding and intended to enter the annular groove 11 cam 14.
  • the locking means 11 also on the rear section 10b and the locking means 12, 14 could be attached to the front portion 10a. After all, other than that locking means or snap connection elements are provided, and instead the locking means 11 or 12, 14 could of course also have other fastening elements his.
  • FIG. 5 to 10 further show, the insert 3 and the inner sleeve 1 by a Clamping connection axially interconnected, the at least one ball 15 and one on Includes circumference of the inner sleeve 1 adjacent band ring spring 16.
  • the ball 15 is in one arranged radial recess of the inner sleeve 1 and under the elastic biasing force the radially outer band ring spring 16 limited, but so far radially inward movable so that it in a on the outer circumference of the hexagonal portion of the insert 3rd trained notch enter and can therefore fix it axially in the inner sleeve 1.
  • a sufficient clamping effect can be achieved even without a notch be achieved.
  • the use of such clamp connections can be like one Snap ring 5 (Fig. 1) compared to the use of a second permanent or Holding magnet 9 (Fig. 3) may be advantageous, as this will have the effect of the first permanent magnet 7 can not be affected and therefore no adjustment of the two Permanent magnets 7 and 9 to each other
  • the two-part variant of the outer sleeve 10 according to FIGS. 5 and 6 has the advantage that the Front portion 10a is easily replaceable. This allows the front section 10a can be exchanged for a front section, if necessary, for another Diameter or another shape or size of the profile tip 3a is designed and z. B. also another permanent magnet 7 with a larger or smaller contact surface 7b can have. This is particularly advantageous because screws are the same Inner profile, e.g. B. a Pozidriv profile of size 2, depending on the thread diameter different Have head diameter. For screws with smaller head diameters expediently selected an annular permanent magnet 7, the smaller one Breakthrough has so that the largest possible contact surface 7b for the screw head 4a given is. Finally, the two-part variant makes it easier to replace the inserts 3, since their profile tips 3a after removing the front portion 10a easily by hand detected and then they can be pulled out of the inner sleeve 1.
  • FIGS. 7 to 9 in which the same parts with the same reference numerals as used in the above-described embodiments, the Preselected axial position of the outer sleeve 10 formed according to FIGS. 5 and 6 with the help a spring 17 shown here as a helical compression spring.
  • the spring 17 is on the Drive shaft 2 mounted and between the rear end of the inner sleeve 1 and Front end of the rear portion 10 b of the outer sleeve 10 supported. This will make the Outer sleeve 10 axially positioned so far in the direction of the drive shaft 2 that it and in the front end used permanent magnet 7, the preselected axial position relative to the Profile tip 3a of the screwdriver insert.
  • FIG. 7 to 9 also show a variant in which the preselected axial position of the outer sleeve 10 on the inner sleeve 1 is adjustable without the screwing device having to be dismantled and, if necessary, provided with a different spacer sleeve 8 (FIG. 1).
  • the drive shaft 2 is provided in an area protruding from the extension 10c or the rear section 10b with an external thread section onto which an adjusting nut 18 provided with a corresponding internal thread is screwed, against which the rear section 17b can engage under the action of the spring 17 ,
  • the axial movement of the outer sleeve 10 is limited in one direction by the rear section 10b abutting the adjusting nut 18 and in the opposite direction by the rear section 10b abutting the compressed spring 17.
  • the adjusting nut 18 can be set once when the screwing device is started up so that the profile tip 3a used in the individual case protrudes forward from the permanent magnet 7 just as much from the permanent magnet 7 as the sum of the prescribed penetration depth and when the outer sleeve 10 stops against the adjusting nut 18 corresponds to the tolerance dimension s described with reference to FIGS. 1 and 2. This position can then be fixed with a lock nut 19 which is also screwed onto the drive shaft 2.
  • the function according to the invention can be carried out in the same way can be achieved, as described above with reference to FIGS. 1 and 2. It is only for this required to choose the force (here the compressive force) of the spring 17 so that on the one hand not used screwing device, the outer sleeve 10 always in the visible from Fig. 7 withdraws the selected starting position, but on the other hand when a screw head approaches 4a is weaker than the tensile force of the permanent magnets 7 corresponds. This will the outer sleeve 10 as in the case of FIGS.
  • the outer sleeve 10 shows a variant of the exemplary embodiment according to FIGS. 7 to 9.
  • the outer sleeve 10 is here provided with a permanent magnet 20, in which a front contact surface 20a a conical or dome-shaped depression is provided.
  • This embodiment is therefore suitable especially for screws 21 with lens heads 21a, the end faces in Contrary to the essentially flat end faces 4b of normal countersunk screws 4 (e.g. Fig. 1) are rounded.
  • the better the contact surface 20a with its depression on the Rounding of the screw heads 21a is adjusted, the better the adhesion achieved of screws 21 on the screwing device.
  • a third sleeve 22 is attached to the outer sleeve 10, which is between a Heel in the front section 10a and a shoulder at the front end of the locking means 11 of the Rear section 10b is easily rotatably mounted.
  • 11 and 12 is the spacer sleeve shown in FIGS. 1 to 4 8 made in one piece with the outer sleeve 6 and as one at the front end integrally formed, radially inwardly projecting, annular projection 6b formed like the The spacer sleeve 8 is at least partially penetrated by the profile tip 3a. So that one Assembly of the screwing device by pushing the outer sleeve 6 onto the inner sleeve 1 is possible, the approach 6a is missing at the rear end of the outer sleeve. Instead, the 11 shows a pot-like, on the rear end of the outer sleeve 6th Pressable end piece 23 is provided.
  • the end piece 23 has a passage for the Drive shaft 2 and can be firmly connected to the outer sleeve 6 after this has been mounted on the inner sleeve 1.
  • a sleeve 24 which can be pressed into the rear end of the outer sleeve 6 be provided with a passage for the drive shaft 2 analogous to the end piece 23 and is mountable.
  • the two exemplary embodiments according to FIG. 11 and 12 that of FIGS. 1 and 2, which is why the same parts with the same reference numerals are provided.
  • the spacer sleeve 8 is by a Spacer in the form of a spring 25, here a helical compression spring replaced. This is supported with a rear end on a formed at the front end of the inner sleeve 1 Shoulder off, while its front end to rest on a rear contact surface 7c des Permanent magnet 7 is determined.
  • the inner sleeve 1 is at the front end expedient compared to Fig. 1 and 2 shortened so much that the hexagonal shaft of Screwdriver insert 3 protrudes further from the inner sleeve than on the one hand Constructions according to FIGS.
  • the spring 25 could e.g. also between the inner sleeve 1 and the shoulder 10d Outer sleeve 10 (Fig. 5, 6) or the extension 6b of the outer sleeve 6 (Fig. 11, 12) is arranged his.
  • the axially acting force of the spring 25 is thus on the magnetic force of the permanent magnet 7 matched that in the apparent from Fig. 13 equilibrium to the front end the coil spring 25 abutting permanent magnet 7 and thus also the outer sleeve 6 Assume preselected axial positions described above with reference to FIGS. 1 and 2.
  • the spring 25 is preferably in a substantially relaxed state, so that its front end as in Fig. 1, the front end of the spacer 8 essentially only as Stop for the permanent magnet 7 is used. Therefore, the profile tip 3a of the insert 3 analogous to Fig. 2 inserted into the inner profile of the screw head 4a (Fig.
  • the rear contact surface 7c of the permanent magnet can, as shown in FIG. 14 shows, axially from the front end of the helical compression spring 25, which is inoperative is.
  • a major advantage of the spring 25 is that the outer sleeve 6 with the fingers and further compressing the spring 25 axially from the position shown in FIG. 13 backwards, i.e. can be moved in the direction of the drive shaft 2, as in FIG. 15 can be seen.
  • the front end of the outer sleeve 6 is axially relatively far behind Profile tip 3a of the insert 3 pushed back that the profile tip 3a practically completely free lies or at least protrudes so far forward over the permanent magnet 7 that it can easily be gripped with the fingers and pulled out of the device. That would not possible if the outer sleeve 6, as in the exemplary embodiments according to FIGS.
  • FIGS. 13 to 15 shows that the axial positions of one formed in the inner sleeve 1 Ring groove 5a with the snap ring inserted and formed in the hexagonal shaft of the insert 3 Notches 5b are selected so that the resilient snap ring 5 at as far as it will go insert 3 inserted into the inner sleeve 1 does not fully engage in the notches 5b, but is partially against an inclined surface of the annular groove 5b. This will make the axial Pulling out the insert 3 forward with your fingers facilitated without the use of pliers or Like. Must be taken to help. This applies even if the wire ends of the Snap rings or spring washers 5 are small burrs due to production. Still remains in this arrangement, the clamping force caused by the snap ring 5 is sufficiently large to to hold the insert 3 securely in the inner sleeve 1 when working.
  • a third sleeve 22 can preferably be rotatably mounted on the outer sleeve 6 be, which corresponds to the sleeve 22 in FIGS. 4 to 10, or the outer sleeve a jacket 26 Have plastic.
  • the exemplary embodiment according to FIGS. 16 to 18 corresponds to the exemplary embodiment according to FIG. 13 to 15 with the difference that the helical compression spring 25 is missing.
  • they are Force of the permanent magnet 7 and the dimensions of the inner sleeve 1 and outer sleeve 6 so designed that the described with reference to the above embodiments Function then results when the outer sleeve 6 is approximately one from FIG. 16 in the unused state apparent intermediate position.
  • This intermediate position is but not by a stroke limiting means for the permanent magnet 7 or the outer sleeve 6 fixed, stable position, which is when the device is not in use automatically sets, but a largely unstable situation.
  • the hexagonal shaft 3 of the insert in the inner sleeve 1 either by a snap ring 5, a permanent magnet 9 or by the ball 15, biased by the ring spring 16, held.
  • the hexagonal shaft of the insert 3 by a Ball 27 held in a radial bore in the front region of the extension 1a becomes.
  • the ball is radially inward by an axially displaceable further sleeve 29 moves until it in the on the outer periphery of the hex section of the insert 3 trained notch snaps into place.
  • the radial movement is effected by a cone 30, which in the front region of the axial bore of the sleeve 29 is incorporated and in Contact position with the ball 27, the axial force acting on the sleeve 29 by a spring 28 translates into a radial force.
  • a cone 30 which in the front region of the axial bore of the sleeve 29 is incorporated and in Contact position with the ball 27, the axial force acting on the sleeve 29 by a spring 28 translates into a radial force.
  • Clamping element are provided, which are machined radially into the extension 1a Slit moved essentially radially.
  • the axial movement of the sleeve 29 is not due to bracing with the clamping element is limited, so if there is no insert in the receptacle, the axial movement limited to the front by the locking ring 31.
  • the spring 28 is supported with the from the rear end on a shoulder, which is formed where the inner sleeve 1 in the Extension 1a merges.
  • the outer sleeve 6 is essentially axial on the inner sleeve 1 slidably guided, the outer surface of the sleeve 29 can be provided as an additional guide become.
  • the spring 25 is supported, which the outer sleeve 1 with the ring magnet 7 in the preselected position to the tip 3a of the insert.
  • the pushing back of the Sleeve 29 causes the outer sleeve 6 to be pushed back until the spring 25 so is stretched far or completely compressed that that acting on the sleeve 29 from the front Force is greater than the force of the spring 28 and the sleeve 29 are pushed back so far can that the ball 27 or another clamping element deflect radially outwards and the clamping of the hexagon section of the insert 3 is released.
  • extension 1a The dimensions of the extension 1a, the distance from its front to Ring magnets 7, the lengths of the springs 25 and 28 in the compressed state and the Length of the sleeve 29 are adjusted so that when pressed to the stop Springs 25 and 28 of the outer sleeve 6 pushed back using the screwdriver insert 3 its front part protrudes far from the screwing device, gripped well with the fingers and can be pulled out of the screwing device.
  • FIG. 21 shows a device according to the invention, which essentially corresponds to the embodiment according to FIG. 13.
  • the embodiment according to FIG. 21 has a stop sleeve 32 in the rear region of the device, which is pressed or pushed onto the shaft 2 and secured with the spring ring 35 and with the front end 33 to the Abuts the rear end of the inner sleeve 1, extends through the enlarged opening in the extension 6a of the outer sleeve 6, 10 and forms a stop with the rear end 34, which prevents the shaft 2 of the device from being too far into the receptacle, for example a three-jaw chuck Electric screwdriver is inserted and about the end of the three-jaw chuck comes to rest on the back of the outer sleeve 6, 10, so that an axial movement of the outer sleeve to the rear is no longer possible.
  • the shaft 2 could have a collar as a stop at this point.
  • the stop sleeve 32 and a collar preferably have a circular peripheral contour so that the outer sleeve 6, 10 can rotate on the inner sleeve 1 and the stop sleeve 32.
  • the stop is formed by a spring ring which is embedded in a groove in the shaft 2 at a corresponding point and whose circumferential diameter is larger than the diameter of the shaft.
  • all of the design variants shown in the figures can also be provided with a stop sleeve or collar.
  • the coaxial position of the screw 4 is achieved in that the outer sleeve 6 has a precise and relatively long guide on the inner sleeve 1, so that the end face 7b of the permanent magnet 7 is always at right angles to the axis of the screwdriver bit 3 and the screw is not is pulled into an oblique position by an abutment surface 7b which is not approximately at right angles to the axis and thus remains standing, there is no longer any coaxial centering of the screw by the inner profile in the screw head 4a on the profile tip 3a.
  • the later behavior of the outer sleeve 6, 10 when a screw 4, 21 is screwed in is largely insignificant.
  • the axial deflection or retraction of the outer sleeve 6, 10 enables screws to be countersunk. Since the outer sleeve 6, 10 can rotate on the inner sleeve, the rotation of the outer sleeve 6, 10 is stopped as soon as the front contact surface 7b of the permanent magnet 7 touches the surface into which the screw is screwed, and friction on the contact surface 7b acts. This largely prevents damage to the surface. At this moment there is a relative rotary movement of the end face 4b of the screw head 4a, but only in relation to the contact face 7b on the permanently degreased until the screw is slightly countersunk.
  • the main design features of the device in the different Design variants are that the outer sleeve 6, 10 with the inserted in its end face Permanent magnet 7 on the inner sleeve 1 in two directions axially easily displaceable and is rotatably guided that the dimensions and shapes of the inner sleeve 1 and the outer sleeve 6, 10 and the magnetic force are selected so that under the influence of the magnetic force and / or the elements influencing the positioning of the sleeves, such as the spring, Spacer sleeve, the outer sleeve occupies a position in an initial position relative to the inner sleeve, in which the standard screwdriver insert 3 inserted into the inner sleeve 1 with its Profile tip 3a from the opening of the permanent magnet comprising the profile tip protrudes so far that the outstanding length is larger than the tolerance dimension s greatest occurring depth of the inner profile in one of the profile tip 3a assigned Screw Type.
  • the invention is not restricted to the exemplary embodiments described, which are based on can be modified in many ways. This initially applies to the type of used Screwdriver bits, especially their profile tips, as well as the associated ones Screws. Instead of screws with Phillips internal profiles, Torx, Pozidriv and other screws and associated inserts can be provided. That is further Invention is not limited to the design of the inner and outer sleeves described. If the benefits of the rotatable outer sleeve can be neglected, it could not rotatable on the inner sleeve even with a cross-section other than cylindrical his. Furthermore, the contact surfaces for the screw heads do not necessarily need to be on the Permanent magnets 7, 20 themselves be formed.
  • Screwdriver bits on the market are included Shaft cross section made of 4 mm, 6.35 mm (1/4 ") and 8 mm hexagon of the screwdriver shafts certain parts of the device must of course be adapted to different dimensions, including the width of the opening in the Permanent magnets, while other parts may remain the same. But it appears expedient, the screw device overall the dimensions of the different sizes of Adjust screwdriver bits.
  • Construction principle also as a special version on special versions of Screwdriver bits can be adapted, for example to those with a round Cross-section of the shaft and a driving surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Joining Of Building Structures In Genera (AREA)
EP02010975A 2001-05-17 2002-05-16 Dispositif à visser pour des embouts de tournevis Expired - Lifetime EP1260319B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10125218 2001-05-17
DE10125218 2001-05-17
DE10148943A DE10148943B4 (de) 2001-05-17 2001-10-02 Schraubvorrichtung für Schraubendreher-Einsätze
DE10148943 2001-10-02

Publications (3)

Publication Number Publication Date
EP1260319A2 true EP1260319A2 (fr) 2002-11-27
EP1260319A3 EP1260319A3 (fr) 2005-02-23
EP1260319B1 EP1260319B1 (fr) 2007-12-19

Family

ID=26009374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02010975A Expired - Lifetime EP1260319B1 (fr) 2001-05-17 2002-05-16 Dispositif à visser pour des embouts de tournevis

Country Status (4)

Country Link
EP (1) EP1260319B1 (fr)
AT (1) ATE381414T1 (fr)
DE (1) DE50211385D1 (fr)
ES (1) ES2298307T3 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1508406A3 (fr) * 2003-08-18 2005-05-11 Felo-Werkzeugfabrik Holland-Letz Gmbh Dispositif de retenue pour tournevis
WO2005017368A3 (fr) * 2003-08-18 2005-05-19 Holland Letz Felo Werkzeug Dispositif magnetique de maintien de vis
WO2006111447A1 (fr) * 2005-04-19 2006-10-26 Wera Werk Hermann Werner Gmbh & Co. Kg Mandrin comprenant une butee de profondeur reglable
US7261023B2 (en) 2003-06-25 2007-08-28 Vessel Industrial Co., Ltd. Bit holder device
US8747043B2 (en) 2010-01-13 2014-06-10 National Nail Corp. Fastener, installation tool and related method of use
US9120214B2 (en) 2010-01-13 2015-09-01 National Nail Corp. Fastener, installation tool and related method of use
US9144896B2 (en) 2010-01-13 2015-09-29 National Nail Corp. Fastener, installation tool and related method of use
CN105563408A (zh) * 2016-03-17 2016-05-11 叶淑惠 工具磁吸滑移装置
US9802300B2 (en) 2010-01-13 2017-10-31 National Nail Corp. Fastener, installation tool and related method of use
DE202018003837U1 (de) 2018-08-18 2018-09-20 Andreas Rack Inline-Mehrfachsteckschlüssel
CN110065036A (zh) * 2018-01-24 2019-07-30 罗伯特·博世有限公司 用于手持式工具机的保持装置
USD1138631S1 (en) 2024-05-02 2026-08-04 Milwaukee Electric Tool Corporation Tool bit assembly

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011000710A1 (de) 2011-02-14 2012-08-16 Wera-Werk Hermann Werner Gmbh & Co. Kg Drehmomentübertragungseinrichtung in Form eines Bitfutters
CN212683073U (zh) * 2020-05-07 2021-03-12 阿特拉斯·科普柯工业技术公司 一种批头连接装置以及拧紧模组

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE722496C (de) * 1939-09-19 1942-07-11 Aeg Schraubenzieher
US3253626A (en) * 1964-08-03 1966-05-31 Gardner Denver Co Magnetic tool
US3392767A (en) * 1965-11-15 1968-07-16 Gardner Denver Co Magnetic tools
US3347293A (en) * 1965-12-23 1967-10-17 Magna Driver Corp Removable bit construction for screwdrivers and the like
DE3704356A1 (de) * 1986-02-20 1987-08-27 Volkswagen Ag Fuehrungshuelse auf einem schrauberschaft
JP3091663B2 (ja) * 1995-02-28 2000-09-25 日東精工株式会社 ビット
DE19907837A1 (de) * 1999-02-24 2000-09-14 Schmidt Ulrich Ush Schraubwerk Schraubwerkzeug mit magnetischer Widerlagerfläche

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7261023B2 (en) 2003-06-25 2007-08-28 Vessel Industrial Co., Ltd. Bit holder device
EP1637285A4 (fr) * 2003-06-25 2008-08-27 Vessel Ind Co Ltd Dispositif de support de meche
EP1508406A3 (fr) * 2003-08-18 2005-05-11 Felo-Werkzeugfabrik Holland-Letz Gmbh Dispositif de retenue pour tournevis
WO2005017368A3 (fr) * 2003-08-18 2005-05-19 Holland Letz Felo Werkzeug Dispositif magnetique de maintien de vis
WO2006111447A1 (fr) * 2005-04-19 2006-10-26 Wera Werk Hermann Werner Gmbh & Co. Kg Mandrin comprenant une butee de profondeur reglable
DE102005017872A1 (de) * 2005-04-19 2006-10-26 Wera-Werk Hermann Werner Gmbh & Co. Kg Futter mit einem einstellbaren Tiefenanschlag
US8747043B2 (en) 2010-01-13 2014-06-10 National Nail Corp. Fastener, installation tool and related method of use
US9120214B2 (en) 2010-01-13 2015-09-01 National Nail Corp. Fastener, installation tool and related method of use
US9144896B2 (en) 2010-01-13 2015-09-29 National Nail Corp. Fastener, installation tool and related method of use
US9802300B2 (en) 2010-01-13 2017-10-31 National Nail Corp. Fastener, installation tool and related method of use
US10315295B2 (en) 2010-01-13 2019-06-11 National Nail Corp. Fastener, installation tool and related method of use
CN105563408A (zh) * 2016-03-17 2016-05-11 叶淑惠 工具磁吸滑移装置
CN110065036A (zh) * 2018-01-24 2019-07-30 罗伯特·博世有限公司 用于手持式工具机的保持装置
DE202018003837U1 (de) 2018-08-18 2018-09-20 Andreas Rack Inline-Mehrfachsteckschlüssel
USD1138631S1 (en) 2024-05-02 2026-08-04 Milwaukee Electric Tool Corporation Tool bit assembly

Also Published As

Publication number Publication date
EP1260319A3 (fr) 2005-02-23
EP1260319B1 (fr) 2007-12-19
DE50211385D1 (de) 2008-01-31
ATE381414T1 (de) 2008-01-15
ES2298307T3 (es) 2008-05-16

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