EP3566813B1 - Support de tête de vis pour un outil à vis portatif - Google Patents

Support de tête de vis pour un outil à vis portatif Download PDF

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Publication number
EP3566813B1
EP3566813B1 EP19167960.4A EP19167960A EP3566813B1 EP 3566813 B1 EP3566813 B1 EP 3566813B1 EP 19167960 A EP19167960 A EP 19167960A EP 3566813 B1 EP3566813 B1 EP 3566813B1
Authority
EP
European Patent Office
Prior art keywords
shaft
screw head
axially
holding
holding device
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.)
Active
Application number
EP19167960.4A
Other languages
German (de)
English (en)
Other versions
EP3566813A2 (fr
EP3566813A3 (fr
EP3566813C0 (fr
Inventor
Lars Dannenmann
Frank Nothacker
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.)
Friedrich Duss Maschinenfabrik & Co GmbH
Original Assignee
Friedrich Duss Maschinenfabrik & Co 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 Friedrich Duss Maschinenfabrik & Co GmbH filed Critical Friedrich Duss Maschinenfabrik & Co GmbH
Publication of EP3566813A2 publication Critical patent/EP3566813A2/fr
Publication of EP3566813A3 publication Critical patent/EP3566813A3/fr
Application granted granted Critical
Publication of EP3566813B1 publication Critical patent/EP3566813B1/fr
Publication of EP3566813C0 publication Critical patent/EP3566813C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25B23/02—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
    • B25B23/10—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means

Definitions

  • the invention relates to a screw head holder with the features of the preamble of claim 1.
  • a screw head holder is from the DE 1 603 888 A known.
  • the known screw head holder has a shaft which has at one end a connecting section for connecting to an output shaft of a screwing tool and at the other end a drive section for driving a screw head.
  • the drive section is provided with a screw head drive in the form of a blade-shaped bit for positive engagement in the screw head.
  • the known screw head holder provides a holding device mounted on the shaft.
  • the holding device has several spherical holding elements. The holding elements can be displaced radially between a holding position and an opening position relative to the drive section of the shaft by means of a relative movement between the shaft and the holding device.
  • the holding elements are displaced radially inwards, whereby the screw head is held axially between the bit and the holding elements.
  • the holding elements are displaced radially outwards, whereby the screw head is axially released.
  • Another screw head holder is from the US 2002/0166421 A1 known and has a shaft and a holding device mounted on the shaft with several spherical holding elements.
  • the holding device has an inner sleeve mounted on the shaft and an outer sleeve mounted on the inner sleeve.
  • the holding elements can be displaced radially to hold and release a screw head depending on an axial relative movement between the outer sleeve of the holding device and the shaft.
  • an annular locking element is provided which can be moved between different positions and effects axial securing between the inner sleeve and the shaft.
  • Another screw head holder is from the US 6,155,145 A known and has a holding device with spherical holding elements for holding and releasing a screw head.
  • Another screw head holder is from the DE 298 22 074 U1 known and has a sleeve with an annular recess and a shaft that is rotatably and displaceably seated in the sleeve.
  • the sleeve is screwed to another cylindrical sleeve via a thread.
  • a holder is slidably accommodated in the further sleeve.
  • the holder has a hole for pushing a drive pin in or through and at least two balls that can be moved radially to hold and release a screw head.
  • the object of the invention is to create a screw head holder of the type mentioned at the outset, which has improved properties compared to the prior art and in particular enables improved handling in connection with screws to be screwed in countersunk.
  • the solution according to the invention achieves a releasable, axially fixed locking of the handling device on the shaft.
  • This locking counteracts in particular an unwanted axial lifting of the drive section from the screw head when the shaft and/or a screw held by the screw head holder is subjected to tension.
  • Such a tensile load can occur, for example, when an axial counterforce pointing away from the screw-in point acts on the screwing tool.
  • Such a counterforce can in particular be due to gravity and can occur when working with the screwing tool and the screw head holder overhead.
  • the drive section can be prepared for a detachable connection with a screw head drive in the form of a bit, a bit holder, a socket wrench insert or the like. Alternatively or additionally, the drive section itself can be designed in the form of a screw head drive.
  • the at least one holding element can be designed in the form of a ball, a roller, a roller or a pin with a rounded end. The same can apply to the at least one locking element.
  • the connecting section of the shaft can be prepared for a positive, non-positive and/or material connection with the output of the screwing tool.
  • the connecting section can be provided with a corresponding thread, a polygonal profile, teeth or the like. In the working position, the at least one holding element assumes the holding position, with the at least one locking element assuming the first locking position.
  • the at least one holding element In a release position corresponding to the working position, the at least one holding element preferably assumes the open position, whereby the at least one locking element preferably assumes a second locking position, in which the holding device and the shaft are unlocked by means of the locking element and are therefore axially displaceable relative to one another.
  • the at least one holding element and the at least one locking element are arranged axially spaced apart from one another.
  • the solution according to the invention is particularly advantageous as a screw head holder for a motor-driven screwing tool, for example for an electric drill or the like, and for holding comparatively long screws, such as those used in particular in the field of structural timber construction.
  • the at least one holding element can be displaced between the open position and the holding position depending on the position of the at least one locking element.
  • the locking element additionally serves to control the displaceability of the holding element between the open position and the holding position.
  • the holding element can only be moved from the opening position to the holding position when the holding device is releasably axially locked on the shaft by means of the locking element.
  • the holding device has an inner sleeve mounted on the shaft and an outer sleeve mounted on the inner sleeve, the at least one locking element being arranged radially between the inner and outer sleeves and/or the shaft and the outer sleeve.
  • both the inner and outer sleeves are oriented coaxially to the shaft.
  • the inner sleeve serves in particular to mount the holding device on the shaft.
  • the inner sleeve can be supported on the shaft in an axially movable or axially fixed manner relative to the shaft.
  • the outer sleeve can be connected to the inner sleeve in an axially movable or axially fixed manner, depending on whether the holding device occupies the working or the release position.
  • the inner sleeve can be releasably and axially fixedly connected to the shaft by means of the at least one locking element.
  • the locking element can have a dual function in that the inner sleeve and the outer sleeve can be releasably and axially fixedly connected to one another by means of the locking element.
  • the outer sleeve serves in particular for handling the holding device, and in particular the displacement of the at least one holding element between the holding and the opening position can be controlled by means of an axial relative movement between the outer and inner sleeves.
  • the at least one locking element can be moved between different locking positions by means of an axial relative movement between the inner and outer sleeves. For example, between the first locking position, in in which the inner sleeve is releasably axially fixed to the shaft and a second locking position in which the inner and outer sleeves are releasably axially fixed to one another by means of the locking element.
  • the inner sleeve in the working position, is releasably and axially fixedly connected to the shaft by means of the locking element, in particular the outer sleeve is supported on the inner sleeve in an axially resilient manner by means of a spring element.
  • the outer sleeve is supported in an axially resilient manner relative to the inner sleeve and is therefore, in contrast to the latter, axially movable relative to the shaft.
  • the spring element counteracts a rearward displacement of the outer sleeve.
  • the spring element is preferably made of metal in the form of a coil spring.
  • the spring element is axially supported at one end on a radial collar of the outer sleeve and at the other end on a radial collar of the inner sleeve.
  • the inner sleeve and the outer sleeve are releasably axially fixed to one another by means of the locking element, the inner sleeve being axially released relative to the shaft.
  • the axially fixed locking between the inner and outer sleeves enables, in particular, improved handling of the holding device in the release position.
  • the inner and outer sleeves can be moved together from the release to the working position by manually moving the outer sleeve. This allows for simplified operation.
  • the locking element is guided radially in a guide recess in the inner sleeve, the locking element being displaced radially inwards in the first locking position and interacting axially in a form-fitting manner with a shaft profile of the shaft and/or in an axially form-fitting manner in a second locking position which is displaced radially outwards interacts with a sleeve profiling of the outer sleeve.
  • the guide recess is preferably arranged on a region of the inner sleeve facing the connecting section of the shaft. The locking element is fixed axially in the guide recess relative to the inner sleeve.
  • the shaft profiling can be in the form of a shoulder formed on the shaft, a radial circumferential groove made in the shaft or the like.
  • the sleeve profiling can be in the form of a shoulder formed on the outer sleeve, a radial circumferential groove made in the outer sleeve or the like.
  • the locking element can be moved from the first locking position into the second locking position by means of an axial relative movement between the inner sleeve and the outer sleeve.
  • an axial relative movement between the inner and outer sleeves can occur, for example, when the outer sleeve comes to rest on the front end at a screw-in point during a screwing-in process and the inner sleeve, which is axially fixed with the shaft, is moved axially forward.
  • the locking element can be moved from the second locking position into the first locking position by means of an axial relative movement between the shaft and the outer sleeve.
  • a relative movement can occur, for example, if, after a screwing-in process, the outer sleeve is manually gripped and moved forward relative to the shaft from the release position. Due to the axially fixed locking between the inner and outer sleeves, the inner sleeve is inevitably carried along relative to the shaft. If this relative movement reaches a certain position, the locking element is forcibly transferred from the second to the first locking position, whereby the inner sleeve is locked to the shaft and the locking between the inner and outer sleeves is released.
  • the at least one holding element is designed in the form of a ball, which is guided in a radial bore of the inner sleeve and is radially supported on an inner cone formed on the outer sleeve. It is advantageous if several balls, preferably three balls, are provided, each of which is guided in a radial bore.
  • the balls preferably form a spherical ring with a variable diameter and which is oriented coaxially to the shaft.
  • the variable diameter ball ring makes it possible to hold screw heads of different shapes and/or dimensions.
  • the radial bore is advantageously designed in such a way that the ball is prevented from falling through in the direction of the central longitudinal axis of the shaft. Due to the radial support of the ball on the inner cone, an axial relative movement between the inner and outer sleeve can be converted into a radial displacement of the ball between the holding and the opening position in a particularly simple manner.
  • the outer sleeve has a cylindrical and radially oriented sleeve which is axially adjacent to the inner cone and is assigned to at least one ball Internal support surface. Accordingly, the inner cone merges into the cylindrical inner support surface in the axial direction.
  • the ball does not experience any radial relative displacement in the area of the inner support surface. This is because, in contrast to the cone, the inner support surface is cylindrical and therefore has no slope.
  • this embodiment of the invention can counteract unwanted loosening of the screw head. Such an unintentional axial relative movement can occur, for example, if misalignment between the screw and the screw head holder causes a flexing movement between these two components.
  • the drive section has an axial receiving recess which is provided for the rotationally fixed reception of a screw head drive, the receiving recess being assigned a positioning element by means of which an axial position of the screw head drive can be adjusted relative to the shaft.
  • the receiving recess can be provided to accommodate a screw head drive, in particular in the form of a bit, a bit holder or a socket wrench insert.
  • the positioning element is preferably oriented coaxially to the receiving recess and forms an adjustable stop for the screw head drive to be received in the receiving recess.
  • the positioning element can be designed in the form of a set screw, a locking bolt or the like.
  • the positioning element can be inserted into a positioning bore that extends axially from the receiving recess.
  • a push or pull member operatively connected to the holding device is provided, by means of which the holding device can be moved relative to the shaft in the direction of the connecting section into a release position subject to axial force, starting from a working position which is releasably axially fixed to the shaft after reaching the open position, in which the drive section protrudes axially forward from the holding device.
  • the holding device moves in the direction of the at least one holding element by means of the push or pull member after reaching the open position Connecting section can be moved into the release position.
  • Connecting section can be moved into the release position.
  • the term “forward” means an axial orientation in the direction of the drive section of the shaft and thus in the direction of the screw-in point.
  • the term “towards the rear” means an axial orientation in the direction of the connecting section of the shaft and thus in the direction of a screwing tool that may be connected to the screw head holder.
  • the holding device is preferably oriented coaxially to the shaft and fixed radially on the shaft. Depending on the operating state and/or position of the holding device relative to the shaft, any components or sections of the holding device can be mounted axially movably relative to the shaft or supported axially fixed on the shaft. After reaching the open position of the at least one holding element, the holding device is axially movable relative to the shaft.
  • the holding device can be moved backwards relative to the shaft into the release position by means of the push or pull member.
  • the holding device In the working position, the holding device is at least partially and/or partially supported axially fixed on the shaft, with further components or sections of the holding device being able to be axially movable relative to the shaft.
  • the at least one holding element assumes the holding position.
  • the drive section In the working position, the drive section is preferably displaced axially backwards into a recess in the holding device and is therefore not visible in a radial viewing direction.
  • the at least one holding element In the release position, the at least one holding element assumes the open position.
  • the holding device In the release position, the holding device is displaced backwards relative to the shaft by means of the push or pull member, with the drive section protruding axially from the holding device.
  • the push or pull member serves for a driven displacement of the holding device in the direction of the connecting section.
  • the push or pull member is preferably designed to be elastic in order to store the drive energy intended for this purpose.
  • the push or pull member can be designed as a spring element in the form of a helical spring made of metal or plastic.
  • the push or pull member is supported at one end on the shaft and at the other end on the holding device.
  • the thrust member causes preferably an axial compressive force applied to the holding device.
  • the tension member preferably causes an axial tensile force to be applied to the holding device.
  • the shaft has a maximum outside diameter, at least in the area of the drive section, which is smaller than the maximum diameter of the screw head to be driven. This prevents the shaft from coming into contact with the relevant screw-in point in the area of the drive section when the screw head to be driven is screwed in. This allows the screw head to be screwed in countersunk.
  • a hand-held screwing tool in the form of an electrically powered drill/driver 1 is shown when screwing in a screw 2 into a material 3 to be screwed.
  • the drill/screwdriver 1 which can also be referred to as a drill, has a basically known design and is therefore provided, among other things, with a chuck 4 on the output side.
  • the material 3 to be screwed is wood, which is based on Fig. 1
  • the apparent shape is greatly simplified for graphical reasons.
  • the material 3 to be screwed can be a workpiece of a building structure made of wood.
  • the screw 2 in the present case has a design that is usually used in structural timber construction.
  • the screw 2 has a screw head 5 in the form of a countersunk head, which is designed with a driving profile 6 in the form of an internal hexagon ( Fig. 2 ).
  • the screw 2 is relatively large for the present intended use and has, for example, a thread diameter of 10 mm and a nominal length of 400 mm. It goes without saying that dimensions that deviate from this are also possible. Due to the dimensions of the screw 2, the required screwing torque is comparatively high. This means that a high axial force must be applied to the drill/driver 1 in order to ensure reliable torque transmission between the drill/driver 1 and the fully threaded screw 2. Due to the design of the driving profile 6 in the form of an internal hexagon, theoretically no axial force is required.
  • the torque transmission is usually carried out by means of a screw head drive which engages in the driving profile 6 and is connected to the drill driver 1 in a torque-transmitting manner Shape of a bit guaranteed.
  • this bit - to put it simply - jumps out of the driving profile 6.
  • This can lead to damage to the bit and/or the driving profile 6.
  • This can cause the screw 2 and/or the screw head drive to become unusable.
  • such a bit jumping out poses a risk of accident for the operator. Due to the sudden interruption of torque, the operator may lose balance, which could result in a fall and injury.
  • a screw head holder 7 is provided, the structural design and functionality of which will be described below using the Fig. 2 to 5 is explained in more detail.
  • the screw head holder 7 has a shaft 8, which has at one end a connecting section 9 for connecting to the chuck 4 of the drill driver 1 and at the other end a drive section 10 for driving the screw head 5.
  • the connecting section 9 is here designed in the form of an external hexagonal profile, which can be clamped non-rotatably into the chuck 4 in a generally known manner.
  • the connecting section is designed in the form of an SDS-plus profile. Regardless of this, different configurations of the connecting section are of course also possible.
  • the drive section 10 has an axial receiving recess 11, in which a screw head drive 12 in the form of a bit is received in a rotationally fixed manner.
  • the bit 12 engages in a form-fitting, non-rotatable manner in the hexalobular internal profile 6.
  • the screw head holder 7 has a holding device 13 with at least one holding element 14.
  • the holding device 13 is designed in such a way that the at least one holding element 14 is radially between a holding position (depending on an axial relative movement between the shaft 8 and the holding device 13 relative to the drive section 10 Fig. 2 , 3 ) and can be moved to an open position ( Fig. 4 , 5 ). In the holding position, the screw head 5 is held axially between the drive section 10, more precisely: the bit 12, and the holding element 14.
  • the holding element 14 In the open position, the holding element 14 is displaced radially outwards, so that the screw head 5 is axially released forward in the direction of the material 3 to be screwed.
  • the screw head holder 7 provides a push or pull member, which in the present case is designed as a push member 15.
  • the thrust member 15 is operatively connected to the holding device 13 and is supported on the shaft 8 and acts in one way Fig. 2 In the apparent working position of the holding device 13, in which the at least one holding element 14 assumes the holding position, an axial force is applied to the holding device backwards in the direction of the connecting section 9.
  • the holding device 13 After reaching the open position of the holding element 14, the holding device 13 is relative to the working position by means of the thrust member 15 the shaft 8 can be moved backwards into a release position ( Fig. 5 ).
  • the release position the drive section 10 protrudes axially forward from the Holding device 13 out.
  • the screw head 5 and a relevant screw-in point 16 are on the material 3 at the end of the screw-in process, as can be seen from Fig. 5 can be seen by the operator in an improved manner. This means that the operator can visually check the required countersinking depth of the screw head 5 without having to interrupt the screwing process and without having to withdraw the screw head holder 7 from the screwing point 16.
  • the drive section 10, together with the bit 12 protrudes axially forward from the holding device 13 by approximately half of the axial length of the holding device 13. This ensures particularly good visibility of the screw-in point 16 by the operator.
  • At least one locking element 19 is provided, which, depending on an axial relative movement between the holding device 13 and the shaft 8, can be moved into a first locking position locked on the shaft 8, in which the holding device 13 is releasably axially fixed to the shaft 8 by means of the locking element 19 is.
  • the holding device 13 is thus axially secured in the working position relative to the shaft 8.
  • the holding device 13 has an inner sleeve 18 mounted on the shaft 8 and subjected to axial force by means of the thrust member 15 and an outer sleeve 17 mounted on the inner sleeve 18.
  • the inner sleeve 18 is releasably and axially fixed to the shaft 8 by means of the locking element 19.
  • the outer sleeve 17 is supported on the inner sleeve 18 in an axially resilient manner by means of a spring element 20.
  • the inner sleeve 18, the outer sleeve 17, the thrust member 15 and the spring element 20 are each oriented coaxially to the shaft 8.
  • the thrust member 15 is in the present case made of metal in the form of a helical spring and is supported at one end at the front on an unspecified radial shaft shoulder of the shaft 8 and at the other end at the rear on an unspecified radial collar of the inner sleeve 18.
  • the inner sleeve is thus prestressed with axial force in the direction of the connecting section 9.
  • the inner sleeve 18 has a guide recess 21.
  • the locking element 19 is fixed in the guide recess 21 in the axial direction relative to the inner sleeve 18.
  • the locking element 19 In the working position, the locking element 19 is supported radially outwards on a cylindrical inner wall section 22 of the outer sleeve 17. Radially on the inside, the locking element engages axially in a form-fitting manner in a shaft profile 23 in the form of a radial groove formed all around the shaft 8. In this way, the inner sleeve 18 is axially firmly connected to the shaft 8. The locking element 19 assumes the first locking position. In contrast to the inner sleeve 18, the outer sleeve 17 is in the working position due to the resilient support by means of the spring element 20 Inner sleeve 18 is axially movable relative to the shaft 8 with a limited stop.
  • the spring element 20 in the present case is a helical spring subjected to pressure.
  • the spring element 20 is supported at one end at the front on an unspecified radial collar of the outer sleeve 17 and at the other end at the rear on an axial locking ring 24 fixed to the inner sleeve 18.
  • the outer sleeve 17 is subjected to forward axial force relative to the inner sleeve 18 and thus relative to the shaft 8.
  • the outer sleeve 17 has a stop collar 25 projecting radially inwards.
  • the inner sleeve 18 has a counter-stop collar 26 assigned to the stop collar 25 and projecting radially outwards.
  • the stop collar 25 and the counter-stop collar 26 are positioned axially against one another.
  • the inner sleeve 18 has at least one radial bore 27, in which the at least one retaining element 14, which is presently spherical in shape, is guided radially and fixed axially relative to the inner sleeve 18.
  • the outer sleeve 17 has an inner cone 28 assigned to the at least one holding element 14. The inner cone 28 is oriented coaxially to the shaft 8 and widened towards the front. In the working position ( Fig.
  • the at least one holding element 14 is supported radially outwards on the inner cone 28. In this way, the at least one holding element 14 can be adjusted in the radial direction by means of an axial relative movement between the outer sleeve 17 and the inner sleeve 18 and thus between the holding position ( Fig. 2 ) and the open position can be moved ( Fig. 4 , 5 ).
  • spherical locking elements 19 and spherical holding elements 14 are provided. These are arranged in a way that is not clearly visible in the circumferential direction of the inner sleeve 18, equally spaced from one another, so that a type of ball ring is formed in each case.
  • several guide recesses 21 and radial bores 27 are accordingly provided. It has proven to be particularly advantageous if three locking elements 19 or holding elements 14 are provided, each offset by 120° in the circumferential direction. For simplified description, reference will still be made below to at least one locking element 19 and at least one holding element 14.
  • the screw head holder 7 during the screwing process will be further explained below based on the following Fig. 2 visible working position explained.
  • the screw head 5 is held axially and centered radially.
  • the drill driver 1 is positioned accordingly together with the screw head holder 7 and the screw 2 held on it and aligned and put into operation to apply the required screw-in torque.
  • the screw-in torque is transmitted starting from the chuck 4 via the connecting section 9 through the shaft 8 to the bit 12 mounted in a rotationally fixed manner in the receiving recess 11, which in turn engages in a torque-proof, form-fitting manner in the driving profile 6.
  • the operator applies a counter-torque to the screwdriver 1 that corresponds in magnitude to the screw-in torque.
  • the application of an axial force is not absolutely necessary since the screw head 5 is held axially on the bit 12 in the manner described above. Due to the rotational movement of the screw caused in this way, it moves axially into the screw-in point 16, with the screw head holder 7 being forcibly tracked together with the drill/driver 1 due to the axial holding of the screw head 5.
  • the outer sleeve 17 has a cylindrical inner support surface 29.
  • the inner support surface 29 is assigned to the at least one holding element 14 and adjoins the inner cone 28 axially. Due to the cylindrical design of the inner support surface 29, the at least one holding element 14 does not experience any radial infeed during a relative movement relative to the inner support surface 29. This counteracts unwanted release of the screw head 5 due to unwanted force. Such an unwanted force can occur, for example, if misalignment between the screw and the screw head holder causes a flexing movement between these two components.
  • the front end region of the outer sleeve 17 comes into contact with the material 3 to be screwed. Further axial movement of the outer sleeve 17 together with the inner sleeve 18 and the shaft 8 is thereby prevented.
  • the shaft 8 moves axially forward together with the inner sleeve 18, which is axially firmly connected by means of the at least one locking element 19, through the outer sleeve 17 resting on the material 3. Due to this relative movement between the inner sleeve 18 and the outer sleeve 17, this becomes at least one Holding element 14 is displaced axially in the direction of a catching groove 30 formed on the outer sleeve 17.
  • the catch groove 30 adjoins the inner support surface 29 axially and is offset radially outward and circumferential.
  • the at least one locking element 19 becomes axially in the direction of one relative to the outer sleeve 17 along the support surface 22
  • Sleeve profiling 31 moves.
  • the sleeve profile 31 is presently designed in the form of a circumferential radial groove on the inner wall of the outer sleeve 17. If the screwing process is continued, the at least one holding element 14 moves radially outwards into the catch groove 30, whereby the screw head 5 is released axially forward. In addition, the at least one locking element 19 moves radially outwards from the wave profile 23 into the sleeve profile 31. This situation is based Fig. 4 clarified.
  • the application of axial force to the thrust member 15 causes the inner sleeve 18 to be displaced in the direction of the connecting section 9. Since the inner sleeve 18 is now axially positively connected to the sleeve profile 31 by means of the at least one locking element Outer sleeve 17 is connected, the latter is forcibly guided backwards in the direction of the connecting section 9. This causes the holding device 13 to move into the base Fig. 5 visible release position is relocated. In this, the inner sleeve 18 rests axially on a stop 32 formed on the shaft, which can be designed in the form of an axial locking ring.
  • the screwing-in process can be completed under visual control of the screwing-in point 16.
  • a required countersunk depth of the screw head 5 in the material 3 can be checked without the screwing process having to be interrupted.
  • the drill driver 1 is used together with the screw head holder 7 based on the reference Fig. 5 apparent situation withdrawn from the screw-in point 16.
  • the additional screw is attached axially to bit 12 in the usual way.
  • the operator grips the outer sleeve 17 and manually moves it axially forward. Due to the in the release position ( Fig. 5 ) existing axial locking between the inner sleeve 18 and the outer sleeve 17, the inner sleeve is positively guided forward and the thrust member 15 is tensioned.
  • the at least one locking element 19 is displaced relative to the shaft 8 in the direction of the shaft profiling 23 and engages with it. The locking element 19 now occupies the first locking position.
  • the screw head holder 7 has a positioning element 33.
  • the positioning element 33 is assigned to the receiving recess 11 and serves for axial positioning of the bit 12.
  • the positioning element 33 is designed in the form of a set screw which is screwed into a threaded hole adjoining the receiving recess 11 axially.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Gripping On Spindles (AREA)
  • Manipulator (AREA)

Claims (11)

  1. Support de tête de vis (7) pour un outil de vissage guidé manuellement (1) avec
    - un arbre (8) qui présente d'un côté une section de raccordement (9) pour le raccordement à une prise de force (4) de l'outil de vissage (1) et, de l'autre côté, une section d'entraînement (10) pour entraîner une tête de vis (5), et
    - un dispositif de maintien (13) monté sur l'arbre (8) avec au moins un élément de maintien (14),
    - sachant que le dispositif de maintien (13) est conçu de sorte que ledit au moins un élément de maintien (14) est déplaçable, selon un mouvement relatif axial entre l'arbre (8) et le dispositif de maintien (13) par rapport à la section d'entraînement (10), radialement entre une position de maintien dans laquelle la tête de vis (5) est maintenue axialement entre la section d'entraînement (10) et l'élément de maintien (14), et une position d'ouverture dans laquelle l'élément de maintien (14) libère axialement la tête de vis (5),
    - sachant qu'est prévu au moins un élément de blocage (19) qui en fonction d'un mouvement relatif axial entre le dispositif de maintien (13) et l'arbre (8), est déplaçable dans une première position de blocage verrouillée sur l'arbre (8) dans laquelle le dispositif de maintien (13) est fixé axialement à l'arbre (8) de manière amovible au moyen de l'élément de blocage (19) et adopte ainsi une position de travail bloquée axialement,
    - sachant que dans la position de travail, ledit au moins un élément de maintien (14) adopte la position de maintien,
    - et sachant que le dispositif de maintien (13) présente une douille interne (18) montée sur l'arbre (8) et une douille externe (17) montée sur la douille interne (18), sachant que ledit au moins un élément de blocage (19) est disposé radialement entre la douille interne (18) et la douille externe (17) et/ou l'arbre (8) et la douille externe (17),
    - caractérisé en ce que dans une position de libération, la douille interne (18) et la douille externe (17) sont fixées ensemble axialement de manière amovible au moyen de l'élément de blocage (19), sachant que la douille interne (18) est libérée axialement par rapport à l'arbre (8).
  2. Support de tête de vis (7) selon la revendication 1, caractérisé en ce que ledit au moins un élément de maintien (14) est déplaçable entre la position d'ouverture et la position de maintien, selon la position dudit au moins un élément de blocage (19).
  3. Support de tête de vis (7) selon la revendication 1 ou 2, caractérisé en ce que dans la position de travail, la douille interne (18) est fixée axialement à l'arbre (8) de manière amovible au moyen de l'élément de blocage (19), sachant notamment que la douille externe (17) repose axialement sur la douille interne (18) de manière élastique au moyen d'un élément à ressort (20).
  4. Support de tête de vis (7) selon l'une des revendications précédentes, caractérisé en ce que l'élément de blocage (19) est guidé radialement dans un évidement de guidage (21) de la douille interne (18), sachant que l'élément de blocage (19) dans la première position de blocage est déplacé radialement vers l'intérieur et interagit axialement par complémentarité de forme avec un profilé (23) de l'arbre (8) et/ou interagit axialement par complémentarité de forme avec un profil (31) de la douille externe (17) dans une seconde position de travail déplacée radialement vers l'extérieur.
  5. Support de tête de vis (7) selon la revendication 4, caractérisé en ce en ce que l'élément de blocage (19) partant de la première position de blocage est déplaçable dans la seconde position de blocage, au moyen d'un mouvement relatif axial entre la douille interne (18) et la douille externe (17).
  6. Support de tête de vis (7) selon la revendication 4 ou 5, caractérisé en ce que l'élément de blocage (19) partant de la seconde position de blocage, est déplaçable dans la première position de blocage, au moyen d'un mouvement relatif axial entre l'arbre (8) et la douille externe (17).
  7. Support de tête de vis (7) selon l'une des revendications précédentes, caractérisé en ce que ledit au moins un élément de maintien est conçu sous forme de boule (14) qui est conduite dans un alésage radial (27) de la douille interne (18) et repose radialement sur un cône interne (28) formé sur la douille externe (17).
  8. Support de tête de vis (7) selon la revendication 7, caractérisé en ce que la douille externe (17) présente une surface d'appui interne (29) cylindrique et orientée radialement, adjacente axialement au cône interne (28) et associée à la dite au moins une boule (14).
  9. Support de tête de vis (7) selon l'une des revendications précédentes, caractérisé en ce que la section d'entraînement (10) présente un évidement de logement axial (11) qui est prévu pour le logement solidaire en rotation d'un entraînement de tête de vis (12), sachant qu'est associé à l'évidement de logement (11) un élément de positionnement (33) au moyen duquel une position axiale de l'entraînement de tête de vis (12) est réglable par rapport à l'arbre (8).
  10. Support de tête de vis (7) selon l'une des revendications précédentes, caractérisé en ce qu'est prévu un organe de poussée ou de traction (15) relié fonctionnellement au dispositif de maintien (13), au moyen duquel organe le dispositif de maintien (13) après avoir atteint la position d'ouverture, peut être déplacé par rapport à l'arbre (8) en partant d'une position de travail fixée axialement à l'arbre de manière amovible, est déplaçable sous l'effet d'une force axiale, en direction de la section de raccordement (9), dans une position de libération dans laquelle la section d'entraînement (10) dépasse axialement vers l'avant, en saillie du dispositif de maintien (13).
  11. Support de tête de vis (7) selon la revendication 10, caractérisé en ce que l'arbre (8) présente, au moins dans la zone de la section d'entraînement (10), un diamètre extérieur maximal inférieur au diamètre maximal de la tête de vis à entraîner (5).
EP19167960.4A 2018-04-17 2019-04-08 Support de tête de vis pour un outil à vis portatif Active EP3566813B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018205847.4A DE102018205847A1 (de) 2018-04-17 2018-04-17 Schraubenkopfhalter für ein handgeführtes Schraubwerkzeug

Publications (4)

Publication Number Publication Date
EP3566813A2 EP3566813A2 (fr) 2019-11-13
EP3566813A3 EP3566813A3 (fr) 2020-02-12
EP3566813B1 true EP3566813B1 (fr) 2023-11-01
EP3566813C0 EP3566813C0 (fr) 2023-11-01

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EP19167960.4A Active EP3566813B1 (fr) 2018-04-17 2019-04-08 Support de tête de vis pour un outil à vis portatif

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EP (1) EP3566813B1 (fr)
DE (1) DE102018205847A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1856998U (de) * 1962-07-03 1962-08-16 Helmut Schmitt Schraubvorrichtung, insbesondere zum finschrauben von holz- oder blechschrauben, fur nicht vorgebohrte werkstuecke.
DE1603888C3 (de) 1967-05-09 1975-12-11 Kajetan 8170 Bad Toelz Leitner Futter zum Spannen von Kopf- und Stiftschrauben beim Einschraubvorgang
DE2521380A1 (de) * 1975-05-14 1976-11-25 John B Eby Zusatzgeraet zum halten von befestigungsmitteln
DE19650799C1 (de) * 1996-12-06 1998-07-02 Sfs Ind Holding Ag Nuß zur Aufnahme eines oder zum Einsetzen in einen Befestigerkopf(es)
US5996452A (en) * 1998-10-13 1999-12-07 Chiang; Shu Chi Chuck device for power tool
US6155145A (en) * 1999-05-14 2000-12-05 Oh; Sae Young Screw and screw driving apparatus
US20020166421A1 (en) * 2001-05-11 2002-11-14 Bowerman Jeffrey Allen Screw driving, locking and alignment device
EP2033740A3 (fr) * 2007-08-09 2009-05-20 Techtronic Industries Company Limited Guide-vis
US7921753B2 (en) * 2009-04-28 2011-04-12 Ho-Tien Chen Screw locking tool
TWI501841B (zh) * 2014-10-17 2015-10-01 Chung Taan Ind Co Ltd 接頭
US9764452B2 (en) * 2015-06-27 2017-09-19 Kevin Scott Koch Device and method for fastener element retention and installation

Also Published As

Publication number Publication date
EP3566813A2 (fr) 2019-11-13
DE102018205847A1 (de) 2019-10-17
EP3566813A3 (fr) 2020-02-12
EP3566813C0 (fr) 2023-11-01

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