EP3517247B1 - Haltevorrichtung für eine handwerkzeugmaschine - Google Patents

Haltevorrichtung für eine handwerkzeugmaschine Download PDF

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Publication number
EP3517247B1
EP3517247B1 EP19151548.5A EP19151548A EP3517247B1 EP 3517247 B1 EP3517247 B1 EP 3517247B1 EP 19151548 A EP19151548 A EP 19151548A EP 3517247 B1 EP3517247 B1 EP 3517247B1
Authority
EP
European Patent Office
Prior art keywords
holding
holding unit
output shaft
holding device
designed
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
EP19151548.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3517247A1 (de
Inventor
Sebastian Melsa
Thomas Duerr
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3517247A1 publication Critical patent/EP3517247A1/de
Application granted granted Critical
Publication of EP3517247B1 publication Critical patent/EP3517247B1/de
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
    • 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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • 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
    • 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 present invention relates to a holding device for a hand-held power tool with a tool holder which is designed at least to hold an insert tool, in particular a screwdriver bit, the holding device being provided for holding a fastening element, in particular a screw element.
  • the hand-held power tool has a tool holder which is designed to hold an insert tool designed as a screwdriver bit.
  • the holding device is provided for holding a screw element, with the holding device being designed as a bit holder of the hand-held power tool.
  • the present invention provides a holding device for a hand-held power tool according to claim 1.
  • the invention thus makes it possible to provide a holding device in which the first holding unit enables the holding device to be arranged directly on the hand-held power tool and in which the holding element assigned to the second holding unit enables a simplified screwing process.
  • a compact holding device can thus be provided, the comparatively short design of which allows a safer and user-friendly screwing process.
  • the first holding unit is assigned at least one holding part for forming a form fit and/or a non-positive fit with an output shaft driving the tool holder.
  • a secure and reliable arrangement of the holding device on a hand-held power tool can thus be made possible.
  • the at least one holding part is designed in the manner of a snap hook, a retaining spring and/or a spring-loaded loading element.
  • a suitable holding part adapted to the output shaft can thus be provided in a simple manner.
  • the at least one holding part is preferably designed to form a non-positive and/or positive connection with a shoulder and/or a recess, which is formed on an output shaft driving the tool holder.
  • a holding part can thus be provided for a stable and robust arrangement of the holding device on the output shaft.
  • the at least one holding part is preferably designed in the manner of a magnet, a magnet with at least one guide sleeve and/or at least one actuating part.
  • An alternative holding part for arranging the holding device on the output shaft can thus be provided easily and in an uncomplicated manner.
  • the magnet is preferably ring-shaped and arranged in a receptacle facing the tool receptacle and/or a receptacle of the first holding unit facing the free end of the holding device. So can a reliable arrangement of the magnet can be made possible in a simple manner.
  • the at least one activating part is designed in the manner of a rib and/or a wedge for forming a press fit with an output shaft driving the tool holder.
  • a secure and stable fixing of the holding device on the output shaft can be made possible.
  • the wedge is preferably arranged in the longitudinal direction and/or in the tangential direction of the first holding unit and is designed to engage in corresponding grooves, which are designed on an output shaft driving the tool holder.
  • the at least one holding part is formed in one piece with the first holding unit, is fastened to the first holding unit or is arranged in a receptacle assigned to the first holding unit.
  • a suitable holding part can thus be made available in a simple manner.
  • the first holding unit can preferably be connected in a torque-proof manner to an output shaft driving the tool holder, with rotary entrainment being provided up to a torque value of preferably 0.1 Nm.
  • a reliable holding device can thus be provided in which, if the 0.1 Nm is exceeded, destruction of the holding device and/or the hand-held power tool can be at least largely prevented or limited.
  • hand-held power tool 100 can be mechanically and electrically connected to a battery pack 190 for mains-independent power supply and is designed, for example, as a cordless drill/driver, but can alternatively also be operated mains-dependent, for example.
  • the present invention is not limited to cordless drills, but rather can be used in different handheld power tools in which an insert tool is rotated, e.g. in a screwdriver or cordless screwdriver, etc.
  • At least one electric drive motor 180 supplied with power by the battery pack 190 is preferably arranged in the tool housing 105 .
  • a gear 109 is arranged in the tool housing 105, to which a torque clutch 199 is optionally assigned.
  • the drive motor 180 can be switched on and off, for example using a manual switch 195, and can be any type of motor, for example an electronically commutated motor or a DC motor.
  • Drive motor 180 is preferably connected via gear 109 to a drive shaft 120 , for example a drive spindle, and drives this drive shaft 120 in rotation, preferably via gear 109 , when hand-held power tool 100 is in operation.
  • the gear 109 and the drive motor are preferably here 180 in a transmission housing 110 or a motor housing 185, which are illustratively arranged separately from one another in the tool housing 105. It is pointed out that the drive motor 180 and the gear 109 can also be arranged directly in the tool housing 105 .
  • hand-held power tool 100 is assigned a tool holder 140 for receiving an insert tool 170, in particular a screwdriver bit.
  • the tool holder 140 has, for example, a bit holder 145 and is arranged in the area of an end face 112 of the tool housing 105 or of the gear housing 110 .
  • the bit holder 145 is preferably made of stainless steel in order to avoid field lines of one of the holding devices according to the invention (300 in 3 ) associated magnet (330 in 3 ) not to be absorbed.
  • the bit holder can also have any other material, eg steel.
  • a magnet is preferably assigned to the bit holder 145 in order to hold the screwdriver bit 170 .
  • Such a magnet is preferably not sufficient to hold a screw element (270 in 2 ) to magnetize and thus also to hold.
  • the tool holder 140 of the hand-held power tool 100 from FIG 1 wherein the drive shaft 120 is operatively connected to an output shaft 224 of the handheld power tool 100 or is formed in one piece therewith.
  • the tool holder 140 or the bit holder 145 is preferably formed on the output shaft 124 .
  • the bit holder 145 preferably and illustratively has a receiving body 247 with a polygonal socket 248 and an outer circumference 249 .
  • the internal polygonal socket 248 is designed to accommodate tools 170 with external polygonal couplings, in particular a screwdriver bit 170, which is why the tool insert 170 is referred to below as “screwdriver bit 170” for the sake of simplicity and clarity.
  • the screwdriver bit 170 is preferably designed for screwing in and/or unscrewing a fastening element 270, in particular a screw element.
  • receiving body 247 On its outer circumference 249, receiving body 247 preferably has a receiving area 289 facing hand-held power tool 100, which extends in the direction of the free end of output shaft 224 into a holding area 286 transforms.
  • the receiving area 289 preferably has a larger diameter than the holding area 286 .
  • the holding area 286 is delimited in the direction of the free end of the output shaft 224 by a shoulder 284 designed as an annular ridge, with the annular ridge 284 preferably having a larger diameter than the holding area 286 .
  • a further receiving area 282 is preferably arranged between the annular web 284 and the free end of the output shaft 224 .
  • a fastening interface 250 In the area of the bit holder 145 or the tool holder 140, a fastening interface 250, also referred to below as the “machine interface”, is preferably provided.
  • the machine interface 250 is preferably used to attach an interchangeable tool attachment (300 in 3 ).
  • the machine interface 250 has an annular fastening device 258 with an outer circumference 259 and an inner circumference 257 that is secured against rotation on an end face 112 of the housing 110 on the transmission housing 119 or the housing 110 , preferably at least in sections. This encases the bit holder 145 at least in sections, for example, with a predetermined radial spacing.
  • a large number of groove-like receptacles 252, 254 are provided, which preferably form an angular position device 260 and are designed to receive at least one and preferably a large number of angle adjustment elements.
  • the groove-like receptacles 252, 254 are, for example, aligned in the longitudinal direction of the machine interface 150, i.e. in the direction of an arrow 299.
  • the groove-like receptacles 252, 254 are preferably formed by projections aligned axially in the direction of the arrow 299, of which only one is provided with the reference numeral 253 for the sake of clarity and clarity of the drawing.
  • the fastening device 258 is preferably arranged on the end face 112 of the housing 110 via at least one and illustratively three fastening elements 262, 264, 266.
  • the fastening elements 262, 264, 266 are preferably designed in the manner of rivets or screws.
  • FIG 3 shows the handheld power tool 100 from FIG 2 with a tool attachment 300 according to the invention, which is designed as a holding device and is referred to below as "holding device 300".
  • the holding device 300 is designed to hold the fastening element 270, in particular a screw element.
  • Holding device 300 preferably has a first holding unit 310 for fixing holding device 300 to hand-held power tool 100 and a second holding unit 320 for holding fastening element 270, in particular the screw element.
  • the first holding unit 310 is preferably designed to enable a detachable attachment of the holding device 300 to the output shaft 224 of the hand-held power tool 100 that drives the tool holder 140 .
  • the second holding unit 320 preferably has at least one holding element 330, in particular a magnet.
  • the at least one magnet 330 is preferably designed as a ring magnet.
  • the ring magnet 330 preferably has an interior receptacle 335 which is designed in such a way that the screwdriver bit 170 can be arranged in the interior receptacle 335 .
  • a screw head of screw element 270 that can be arranged on screwdriver bit 170 can only be arranged in sections in interior receptacle 335 .
  • the magnet 330 can also be formed from ring segments.
  • magnets for holding the screw element 270 can also be assigned to the second holding unit 320 .
  • the magnets can also have any other shape, e.g. a square shape.
  • the output shaft 224 may be made of magnetic steel. It is pointed out that the magnet 330 is essentially not designed to magnetize the screwdriver bit 170 .
  • the magnet 330 embodied as a ring magnet is preferably embodied in such a way that a north pole of the magnet 330 is arranged in the direction of the screw element 270 and a south pole in the direction of the output shaft 224, or vice versa.
  • the second holding unit 320 is preferably arranged in an axially movable manner on the first holding unit 310, it being possible for the second holding unit 320 to be arranged in a working position and a parking position. In 3 the second holding unit 320 is arranged in the working position.
  • the holding device 300 preferably the first and second holding units 310, 320, is preferably made of plastic, at least in sections.
  • the first and second holding unit 310, 320 are preferably designed as an injection molded part.
  • the holding device 300 can also comprise a different material, for example steel, aluminum or any other cast material.
  • First holding unit 310 can preferably be connected to output shaft 224 driving tool holder 140.
  • the first holding unit 310 is preferably arranged on the output shaft 224 in such a way that rotary entrainment takes place up to a predefined torque value.
  • the specified torque value is preferably 0.1 Nm. If this torque value is exceeded, e.g. by holding the holding device 300 during a screwing process, the rotary driver is released and the holding device 300 no longer rotates with the output shaft 224.
  • the screwdriver bit 170 rotates further with the screw element 270, since the magnet 330 is not aligned in such a way that it further holds the screw element 270 in place, since the magnet 330 is preferably configured only for holding the screw element 270 axially and not for holding it radially.
  • the first holding unit 310 preferably has a conical section 411 and a cylindrical section 413 adjoining the conical section 411 .
  • the conical section 411 is preferably arranged on a side of the first holding unit 310 facing the hand-held power tool 100 .
  • Conical section 411 preferably forms a transition section from a diameter of fastening device 258 assigned to hand-held power tool 100 to a diameter assigned to holding device 300 .
  • the conical section 411 preferably also prevents the fastening device 258 from getting dirty and/or damaged or dirt, sawdust, etc. from penetrating into the interior of the hand-held power tool 100.
  • the design of the section 411 of the first holding unit 310 only exemplary is conical.
  • the section 411 can also have any other shape, for example in the manner of a hemisphere.
  • the cylindrical section 413 can also optionally be omitted, with section 411 having a guide for the second holding unit 320 .
  • the first holding unit 310 is preferably assigned an annular base body 412 which is preferably arranged within the conical section 411 .
  • the annular body 412 is integral with the tapered portion 411, but may also be mechanically attached thereto.
  • the two sections 411 and 413 can also be designed in the manner of a housing, in which the annular base body 412 is arranged or pressed in the manner of a receiving sleeve.
  • the ring-shaped base body 412 is preferably designed for arranging the holding device 300 on the output shaft 224 . When the holding device 300 is mounted on the hand-held power tool 100 or the output shaft 224, the annular base body 412 with its interior receptacle (522 in 6 ) arranged on the receiving area 289 of the output shaft 224.
  • the first holding unit 310 preferably has at least one holding part 490.
  • the at least one holding part 490 is preferably designed to form a form fit and/or a non-positive fit with output shaft 224.
  • holding part 490 preferably forms the non-positive and/or positive connection with shoulder 284, which is configured as an annular web and is assigned to output shaft 224, and/or a recess (912 in 11-14 ) out.
  • the at least one holding part 490 is preferably embodied in one piece with the first holding unit 310, fastened to the first holding unit 310, or in a receptacle assigned to the first holding unit 310 (1007 in 13 and 14 ; 1131 in 16 and 17 ; 1164 in 19 ; 1195 in 25 ) arranged.
  • the first holding unit 310 preferably has a plurality of holding parts 490, preferably four holding parts 490, with 4 only two holding parts 490 are shown.
  • the design of the first holding unit 310 with four holding parts 490 is merely exemplary in nature and should not be seen as a limitation of the present invention.
  • the first holding unit 310 can have any number of holding parts 490 .
  • the at least one holding part 490 is designed in the manner of a snap hook 414.
  • the four snap hooks 414 are preferably arranged on the base body 412 of the first holding unit 310, but can also be arranged on another element assigned to the first holding unit 310 or be attached to it via a connection.
  • the snap hook 414 can also be designed as a formed sheet metal part.
  • the ring-shaped base body 412 of the first holding unit 310 preferably has an interior receptacle 499 .
  • At least one spring element 410 for loading the second holding unit 320 into the working position is preferably arranged in the interior receptacle 499 .
  • the spring element 410 is preferably arranged between the end of the inner receptacle 499 facing the first axial end 404 of the holding device 300 and the end of the second holding unit 320 facing the first axial end 404 .
  • the cylindrical section 413 of the first holding unit 310 preferably has an interior receptacle 417, which preferably widens in the direction of an end 402 of the holding device 300 facing the handheld power tool 100 via a contact edge 418 into a guide section 416.
  • the guide section 416 preferably has a larger diameter than the inner receptacle 417 , the diameter of the guide section 416 being associated with a limiting element 438 associated with the second holding unit 320 .
  • the standing edge 418 is preferably designed to limit a movement of the second holding unit 320 in the direction of the free end 402 of the holding device 300 .
  • the second holding unit 320 preferably has an approximately cylindrical base body 431 .
  • the second holding unit 320, or the cylindrical base body 431 preferably has an outer diameter associated with the inner receptacle 417 of the first holding unit 310.
  • the second holding unit 320 preferably has an interior receptacle 432 which is designed to be guided on the output shaft 224 , in particular on the receptacle area 282 formed at the free end of the output shaft 224 .
  • To the at least one delimiting element 438 is preferably formed at the end of the second holding unit 320 that faces the first end 402 of the holding device 300.
  • limiting elements 438 are preferably arranged along the circumference of the cylindrical base body 431 .
  • the at least one delimiting element 438 can also be embodied as a peripheral collar.
  • the delimiting elements 438 are preferably designed to be spring-elastic, so that simple assembly can take place. During assembly, the delimiting elements 438 are acted upon in the radial direction inwards and can thus be arranged in the guide section 416 through the inner receptacle 417 .
  • the second holding unit has a receptacle 436 for arranging the magnet 330 .
  • the receptacle 436 is preferably formed in the cylindrical base body 431 .
  • the magnet 330 is preferably arranged in the receptacle 436 via a clamp connection and/or via a material connection.
  • the magnet 330 is preferably glued into the receptacle 436 .
  • the receptacle 436 is arranged at a free end 403 of the second holding unit 320 .
  • the receptacle 436 is formed at the free end 403, the magnet 330 being arranged in the receptacle 436 in such a way that a side of the magnet 330 facing the free end 403 and the second holding unit 320 form a planar surface.
  • the interior receptacle 432 of the second holding unit 320 preferably has a holding section 434 on which the magnet 330 rests on its side facing away from the free end 403 .
  • the holding section 434 is preferably designed as an annular wall 434 .
  • the annular wall 434 preferably prevents movement of the magnet 330 in the direction of the first axial end 404 of the holding device 300.
  • An adhesive is preferably only arranged in the area of the receptacle 436 and preferably not in the area of the annular wall 434.
  • the magnet 330 can also be placed in the Receptacle 436 may be pinched.
  • the second holding unit 320 is arranged in the working position in which, as described above, the at least one spring element 410 acts on the second holding unit 320.
  • the delimiting element 438 of the second holding unit 320 is preferably in contact with the standing edge 418 of the first holding unit 310 .
  • FIG 5 shows the holding device 300 of FIG 4 in the parking position.
  • the second holding unit 320 is preferably arranged displaced in the direction of the first end 404 of the holding device 300, or illustratively to the left.
  • the second holding unit 320 is preferably arranged inside the first holding unit 310 .
  • the second holding unit 320 is preferably displaced manually by a user of the hand-held power tool 100.
  • the spring element 410 is compressed in the process.
  • the screwdriver bit 170 arranged in the interior receptacle 248 preferably protrudes beyond the free axial end 403 of the second holding unit 320 in the parked position of the second holding unit 320.
  • the second holding unit 320 is preferably held by the magnet 330 in the parked position.
  • FIG. 6 shows the holding device 300 of FIG Figures 3 to 5 in the working position viewed from the first end 404 .
  • the base body 412 illustratively has four recesses 512.
  • the base body 412 preferably has a number of recesses 512 corresponding to a number of delimiting elements 438 of the second holding unit 320 .
  • the delimiting elements 438 are preferably arranged in the recesses 512 .
  • clarified 6 an inner circumference 522 of the base body 412, the inner circumference 522 being able to be arranged on the output shaft 224.
  • FIG. 7 shows the holding device 300 of FIG Figures 3 to 5 , which has at least one, preferably four, illustratively three, actuating elements 612 for moving the second holding unit 320 into the parking position.
  • the second holding unit 320 preferably has the actuating elements 612 for manually adjusting the second holding unit 320 from the working position to the parking position, or vice versa.
  • the actuating elements 612 are preferably arranged on the outer circumference of the second holding unit 320 . In this case, the actuating elements 612 are preferably designed as radial extensions 614 of the second holding unit 320 .
  • the first holding unit 310 or the cylindrical section 413 of the first holding unit 310 preferably has recesses 622 assigned to the actuating elements 612 .
  • FIG 8 shows the holding device 300 of FIG 7 in the working position, wherein the second holding unit 320 is not acted upon by the spring element 410 in the working position.
  • the second holding unit 320 has in FIG 8 shown embodiment at its end facing the first end 404 of the holding device 300 end an axial extension 712.
  • the axial extension 712 is preferably designed as a cylindrical extension.
  • the interior receptacle 499 of the first holding unit 310 is preferably designed as a guide 725 of the axial extension 712, with the axial extension 712 being arranged in the guide 725 in a displaceable manner.
  • the delimiting element 438 is in the in 8 shown working position of the second holding unit 320 at the standing edge 418 of the first holding unit 310.
  • FIG 9 shows the holding device 300 of FIG 7 and 8 in the parking position.
  • the second holding unit 320 can be held in place by manual displacement by a user or by actuation of the actuating elements 612 by 7 arranged in the direction of the first end 404 of the holding device 300 within the first holding unit 310 .
  • An illustrative left-hand end of the axial extension 712 rests on an illustrative left-hand end of the interior receptacle 499 or the guide 725 of the first holding unit 310.
  • FIG. 10 shows the holding device 300 of FIG Figures 3 to 6 with the holding part 490 embodied as a snap hook 414, for example, in the working position.
  • snap hooks 414 form a non-positive and/or positive connection with output shaft 224 or with annular web 284 assigned to output shaft 224.
  • First holding unit 310 or a side of the first holding unit facing hand-held power tool 100 is also located 310, on an annular web 812 assigned to the output shaft 224.
  • the snap hooks 414 preferably press the first holding unit 310 against the annular web 812.
  • a side 830 of the screw element 270 arranged on the holding device 300 that faces the magnet 330 preferably lies on a side that faces the screw element 270 Page 829 of the magnet 330. Screw element 270 is thus at least approximately magnetized and is thus held on holding device 300 at least in axial direction 299 .
  • the output shaft 224 preferably has a recess 912 between the receiving area 289 and the annular web 284.
  • the puncture 912 is in 11 preferably rectangular, but can have any shape.
  • the holding part 490 preferably forms the non-positive and/or positive connection with the recess 912.
  • the interior receptacle 432 is assigned to the first holding unit 310 .
  • the interior shot 432 is in 11 arranged on the receiving area 282 of the output shaft 224 .
  • the indentation 912 is preferably designed as a trapezoidal indentation. Analogous to 11 the holding part 490 preferably forms the non-positive and/or positive connection with the recess 912.
  • the first holding unit 310 has a receptacle 1007.
  • the receptacle 1007 is preferably formed in the radial direction of the output shaft 224 and preferably has at least one, illustratively two, constriction sections 1008 on its open end facing the output shaft 224 .
  • the holding part 490 is in 13 designed in the manner of a spring-loaded loading element 1004.
  • the impinging element 1004 is designed in the manner of a sphere, but can also have any other shape, for example a rectangle.
  • the loading element 1004 and a spring element 1002 loading the loading element 1004 are arranged in the receptacle 1007 .
  • the spring element 1002 acts upon the urging element 1004 out of the receptacle 1007 or into the recess 912 and thus fixes the holding device 300 on the output shaft 224.
  • the illustrative two constriction sections 1008 prevent the actuating element 1004 from falling out of the receptacle 1007.
  • FIG. 14 shows the output shaft 224 with the recess 812 of 12 and 13 and a holding part 490, which is preferably designed in the manner of a holding spring 1110.
  • the retaining spring 1110 is preferably designed as a c-shaped clip. Furthermore clarified 14 the arrangement of the retaining spring 1110 in the receptacle 1007 of the first retaining unit 310.
  • the retaining spring 1110 is arranged on the output shaft 224 or the recess 912, with an outer circumference of the retaining spring 1110 in the receptacle 1007 is arranged.
  • the output shaft 224 is preferably made of ferromagnetic steel and the holding part 490 is preferably designed in the manner of a magnet 1122.
  • the magnet 1122 is preferably designed as a ring magnet 1121 .
  • the annular magnet 1121 is preferably arranged on the receiving area 282 of the output shaft 224, preferably between the annular web 284 of the output shaft 224 and a side 1124 of the receptacle 1007 of the first holding unit 310 that faces the free end of the output shaft 224.
  • the receptacle 1007 is designed in such a way that that the diameter is larger than the diameter of the annular ridge 284, so that the annular ridge 284 can be arranged within the receptacle 1007.
  • the magnet 1122 which is preferably designed as a ring magnet 1121, is arranged at the free end of the output shaft 224.
  • the ring magnet 1121 is arranged in front of, or illustratively to the right of, the interior receptacle 248 for arranging an insertion tool 170 .
  • the first holding unit 310 preferably has a receptacle 1131 for arranging the ring magnet 1121 in front of the interior receptacle 248 .
  • the receptacle 1131 is arranged, for example, on a side facing the free end 402 of the holding device 300 .
  • the receptacle 1131 preferably has a larger diameter than the inner receptacle 432.
  • the ring magnet 1121 preferably has an interior receptacle 1132 for arranging the screwdriver bit 170 at least in sections.
  • the holding part 490, here in 16 the ring magnet 1121, for holding the holding device 300 and the screw element 270 may be designed.
  • FIG 17 shows the output shaft 224 of FIG 16 , wherein the holding part 490 is designed in the manner of a magnet 1122, preferably with at least one guide sleeve 1141.
  • the magnet 1122 which is preferably designed as a ring magnet 1121, is assigned at least one, illustratively two, guide sleeves 1141, with the ring magnet 1121 preferably being arranged between the two guide sleeves 1141.
  • the guide sleeves 1141 are preferably arranged in the receptacle 1131 of the first holding unit 310 and, analogous to the ring magnet 1121, have an internal receptacle 1142 for the at least partial arrangement of the screwdriver bit 170.
  • the two guide sleeves 1141 have different lengths, it also being possible for the guide sleeves 1141 to be of the same length.
  • the guide sleeves 1141 are preferably ferromagnetic in order to conduct a magnetic flux to the holding device 300 and to the screw element 270 held by the holding device 300 .
  • a distance from the output shaft 224 and/or from the screw element 270 can be determined by the length of the guide sleeves 1141, as a result of which a desired holding force can be set.
  • the first holding unit 310 preferably has a cylindrical base body 1152 with an interior receptacle 1153 .
  • At least one, preferably a plurality, illustratively six holding parts 490 embodied as loading parts 1154 are arranged on the interior receptacle 1153 .
  • the application parts 1154 are designed in the manner of a rib to form a press fit with the output shaft 224 .
  • the loading parts 1154, or the ribs 1154 in the interior receptacle 1153, are preferably formed radially inwards.
  • the first holding unit 310 is preferably made of an elastic or rubber-like material. Thus, the first holding unit 310 can be pushed onto the output shaft 224 and through the press fit between the first holding unit 310, the holding part 490 and the output shaft 224 preferably creates the adhesive force.
  • the first holding unit 310 has a receptacle 1164 for arranging a holding part 490 embodied as a loading part 1154 .
  • the applying part 1154 is analogous to 18 formed from an elastic material, preferably as a rubber ring.
  • the rubber ring 1154 is preferably pressed into the receptacle 1164 in order to prevent it from falling out.
  • the rubber ring 1154 preferably protrudes in sections from the receptacle 1164 and thus forms the press fit with the output shaft 224 or its receptacle area 282 .
  • FIG 20 shows the first holding unit 310 of FIG 3 to 9 , which are analogous to the first holding unit 310 of FIG 18 has a cylindrical base body with the interior receptacle 432, the at least one holding part 490 being arranged on the interior receptacle 432.
  • the first holding unit 310 is preferably analogous to FIG 18 made of an elastic material.
  • the at least one holding part 490 is designed as an application part 1172, wherein the application part 1172 in comparison to the application part 1154 of 18 is formed only in sections in the longitudinal direction 1175 of the first holding unit 310 .
  • a plurality of urging parts 1172 are arranged in the circumferential direction of the first holding unit 310 .
  • the urging parts 1172 for forming the press fit with the output shaft 224 are preferably designed in the manner of splines 1174 .
  • the wedges 1172 are designed to engage in corresponding grooves (1182 in 21 ) formed, which are formed on the output shaft 224.
  • the wedges 1174 are preferably arranged on the inner receptacle 432 in such a way that a respective tip of the wedge 1174 faces the hand-held power tool 100 when it is mounted on the output shaft 224 .
  • the wedges 1174 are formed integrally with the first holding unit 310, however, the wedges 1174 can be analogous to 19 into the first holding unit 310 be pressed in.
  • the plurality of wedges 1174 can also be combined as a ring and pressed into the first holding unit 310 .
  • the output shaft 224 preferably has at least one longitudinal groove 1182, preferably a plurality of longitudinal grooves 1182 and preferably a number of longitudinal grooves assigned to the number of actuating parts 1172.
  • the first holding unit 310 is pushed onto the output shaft 224 .
  • the output shaft 224 has interruptions or grooves 1184 .
  • the interruptions or grooves 1184 are designed as indentations in the webs formed by the longitudinal grooves 1182 .
  • the wedge 1172 is designed to engage in corresponding grooves 1182, 1184, which are formed on the output shaft 224
  • the at least one holding part 490 is designed as a loading part 1172, with the loading part 1172 in comparison to the loading parts 1172 designed as wedges in FIG 20 is formed in the radial or tangential direction 1176 of the first holding unit 310 .
  • the wedges 1174 are arranged as ring sections on the inner receptacle 432 .
  • the wedges 1172 are formed integrally with the first holding unit 310, however, the wedges 1172 can be analogous to 19 also be pressed into the first holding unit 310 .
  • the plurality of wedges 1172 can also be combined as a ring and pressed into the first holding unit 310 .
  • the wedges 1172 are designed to engage in corresponding grooves 1184 of the output shaft 224 .
  • the first holding unit 310 is first pushed onto the output shaft 224 in the longitudinal direction and then rotated in the circumferential direction.
  • the wedges 1172 are then arranged in the area of the interruptions 1184 of the output shaft 224 and form the press fit there.
  • the magnet 1194 is preferably embodied as a ring magnet and is arranged on a side of the holding device 300 that faces the hand-held power tool 100.
  • the magnet 1194 can also be formed from ring segments.
  • the magnet 1194 In order to arrange the magnet 1194 on the end face of the holding device 300 or the first holding unit 310 facing the handheld power tool 100 , the latter has a receptacle 1195 on its end face facing the handheld power tool 100 .
  • the magnet 1194 forms a magnetic flux with the fastening device 258 of the hand-held power tool 100 .
  • the fastening device 258 is preferably made of a ferromagnetic material.
  • Fastening device 258 preferably does not rotate with output shaft 224 and thus holding device 300 does not rotate with output shaft 224 either. It is therefore necessary for the holding device 300 or the first holding unit 310 to be mounted on the output shaft 224 .
  • a plain bearing is preferably arranged between the first holding unit 310 and the output shaft 224, wherein a material pairing of the materials of the two elements is to be selected such that sliding between the output shaft 224 and the first holding unit 310 is possible.
  • the storage mentioned is in 23 not shown.
  • the first holding unit 310 has a recess 1192 in the area of the holding area 286 of the output shaft 224, in which the output shaft 224 can rotate.
  • the 24 shows the first holding unit 310 of FIG 3 to 9 , which is analogous to the first holding unit 310 of FIG 24 has holding parts 490 on its end face.
  • the holding parts 490 are preferably designed in the manner of coupling elements 1211 which form a coupling contour 1210 .
  • the coupling elements 1211 are preferably trapezoidal and have an elastic material.
  • the coupling elements 1211 form a fixation with the fastening device 258 of the hand-held power tool 100, which is preferably embodied as a clamp connection.
  • the coupling elements 1211 are arranged in the groove-like receptacles 252, 254 of the fastening device 258 and jam there.
  • 25 12 shows the alternative embodiment fastener 258 of FIG 2 of the hand tool machine 100 of 1 , wherein the projections 253 of the fastening device 258 are formed as undercuts, which are connected to a coupling element 1211 of 26 form a bayonet connection.
  • the first holding unit 310 of 26 in the direction of an arrow 1222, or in the longitudinal direction of the fastening device 258, and preferably by means of a rotary movement in the circumferential direction, the coupling elements 1211 are clamped in the direction of an arrow 1221 under the undercut 253 of the fastening device 258.
  • the first holding unit 310 has the coupling contour 1210 with the coupling elements 1211 on its end face facing the hand-held power tool 100 .
  • the coupling elements 1210 have an illustrative and preferably rectangular base body 1225 with a recess 1227, the coupling elements 1210 for arrangement on undercuts of the fastening device 258 of 25 are trained.
  • FIG. 27 shows the coupling element 1210 of FIG 26 in the direction of an arrow 1226 or viewed from below. This makes it clear 27 an exemplary configuration of the recess 1227 of the coupling element 1210, or of the preferably rectangular base body 1225. It is pointed out that the base body 1225 of the coupling element 1210 can also have a different shape.
  • a depth stop 1230 is preferably assigned to the second holding unit 320, which sets a desired screwing-in depth of the screw element 270 arranged on the holding device 300.
  • the depth stop 1230 also allows a screw element 270 to be screwed in deeper than the surface of a workpiece. This is typically the case with a workpiece made of wood.
  • the screw-in depth can be adjusted via a thread 1233, 1234 formed between the first and second holding unit 310, 320.
  • An internal thread 1234 is preferably assigned to the first holding unit 310 and an external thread 1233 is assigned to the second holding unit 320 .
  • the second holding unit 320 preferably has a receptacle 1231 with a fixing element 1232 arranged therein.
  • the fixing element 1232 is preferably designed as a rubber ring. This preferably increases the friction when turning the thread 1233, 1234, so that an inadvertent adjustment of the set screw-in depth can be prevented.
  • the holding device 300 preferably the first holding unit 310, has a guide groove 1242 with locking positions formed therein, a locking pin 1244 assigned to the second holding unit 320 being arranged in the guide groove 1242.
  • the second holding unit 320 has an actuating element 1249 for setting the desired screw-in depth.
  • a detent spring 1247 assigned to the second holding unit 320 engages with a toothing 1246 assigned to the first holding unit 310 .
  • Actuation of the actuating element 1249 releases the detent spring 1247 and a desired screw-in depth can be set by rotating the second holding unit 320 .
  • the second holding unit 320 is slid toward the rearward position until the locking pin 1244 strikes the guide groove 1242, thereby defining the depth stop 1230.
  • 31 shows the teeth 1246 of the first holding unit 310 with the detent spring 1247 of the second holding unit 320 of FIG 30 in the direction of an arrow 1241 from 30 considered, or viewed from the front. This makes it clear 31 the arrangement of the detent spring 1247 in the toothing 1246.
  • the detent spring 1247 has a counter-contour 1248 of the toothing 1246 for this purpose.
  • the recesses 622 are preferably formed between two adjacent webs 1320 .
  • the webs 1320 preferably each have the guide section 1324 facing the recesses 622 and the actuating elements 612 preferably have a guide groove 1322 on their sides facing the webs 1320 .
  • the guide portions 1324 and the guide grooves 1322 are designed to slide easily.
  • Figure 33 shows the holding device 300 of FIG 32 with the screw element 270. This clarifies Figure 33 the webs 1320 with the guide sections 1324 and the guide grooves 1322 of the actuating elements 612.
  • 34 shows the holding device 300 of FIG 32 and 33 in the parking position. This makes it clear 34 an axial extension 1312 of the second holding unit 320.
  • the axial extension 1312 is formed in the direction of the first holding unit 310.
  • Figure 35 shows the holding device 300 of FIG 32 to 34 in the working position.
  • Figure 35 the arrangement of the holding device 300 on the output shaft 224 of 2 with the holding parts 490, designed as snap hooks 414, of the first holding unit 310 and the actuating elements 612 assigned to the second holding unit 320
  • Figure 35 the axial extension 1312, at the end of which facing the output shaft 224 the limiting element 438 is arranged.
  • the limiting element 438 is in the in Figure 35 shown working position on the standing edge 418 of the conical section 411 of the first holding unit 310 associated standing element 1338 arranged.
  • the first holding unit 310 has a guide track 1339 on its guide sections 1324 .
  • the axial extension 1312 On its inner circumference, the axial extension 1312 has a receptacle 1334 for arranging the spring element 410 .
  • Figure 36 shows the holding device 300 of FIG 32 to 35 .
  • the magnet 330 is arranged in the receptacle 436 of the second holding unit 320 .
  • the spring element 410 is arranged between the first and second holding units 310, 320.
  • the first and second holding units 310, 320 are then arranged next to one another, with the axial extension 1312 of the second holding unit 320 being arranged on the respectively associated guideway 1339.
  • the axial extension 1312 is preferably designed to be spring-elastic, so that it can be acted upon radially inwards and can be arranged in the guideway 1339 in such a way that it is illustratively arranged to the right of the standing element 1338 of the first holding unit 310, or in the Figure 35 shown queuing position can be arranged.
  • FIG 37 shows the first holding unit 310 of FIG 32 to 35 . This makes it clear 37 the webs 1320 with the guide sections 1324 and the guide tracks 1339. Furthermore, FIG 37 the configuration of the first holding unit 310 with four illustrative webs 1320, which are merely exemplary. Thus, the first holding unit 310 can also have more or fewer webs 1320 , with the number of webs 1320 corresponding to the number of axial extensions 1312 of the second holding unit 320 .
  • the snap hooks 414 are preferably distributed evenly in the circumferential direction of the first holding unit 310 .
  • the snap hooks 414 can also be distributed unevenly in the circumferential direction of the first holding unit 310 .
  • the design of the first holding unit 310 with four snap hooks 414 is merely exemplary and should not be seen as a limitation of the invention. In this way, the first holding unit 310 also have fewer or more than four snap hooks 414.
  • the snap hooks 414 are designed as segments, but the retaining part 490 designed as a snap hook 414 can also be designed as a single ring.
  • 38 shows the first holding unit 310 of FIG 37 . This makes it clear 38 the webs 1320 and the recesses 622 for arranging the axial extensions 1312 of the second holding unit 320.
  • Figure 39 shows the first holding unit 310 of FIG 38 on the output shaft 224 from 2 .
  • the ring-shaped base body 412 of the first holding unit 310 is arranged on the receiving area 289 of the output shaft 224 and bears against the ring web 812 in the direction of the hand-held power tool 100 .
  • the snap hooks 414 preferably form the non-positive and/or positive connection with the shoulder 284 assigned to the output shaft 224 .
  • figure 40 shows the holding device 300 of FIG 32 to 39 in the working position with a further arrangement of the magnet 330 associated with the second holding unit 320.
  • the receptacle 436 for arranging the magnet 330 is preferably arranged at a distance from a free axial end 403 of the second holding unit 320.
  • the second holding unit 320 is preferably molded onto the magnet 330 by means of plastic injection molding.
  • the magnet 330 can also be beaded in some other way.
  • a holding section 1434 is arranged on the free axial end 403 of the second holding unit 320, so that the magnet 330 is arranged between the holding section 434 and the holding section 1434 and fixed by them.
  • Figure 41 shows the holding device 300 of FIG figure 40 with the screwdriver bit 170 and the screw element 270 in the working position.
  • the side 830 of the screw element 270 arranged on the holding device 300 that faces the magnet 330 is preferably in contact with the side 829 of the magnet 330 that faces the screw element 270 .
  • the screw element 270 is at least approximately magnetized and is thus held on the holding device 300 at least in the axial direction 299 .
  • the magnet 330 is preferably displaced axially from a free axial end 1398 of the output shaft 224 in the direction of the axial end 404 facing the first holding unit 310 such that the magnet 330 comes into contact with the screw element 270.
  • An axial end 1399 associated with the interior receptacle 432 of the second holding unit 320 and facing the first holding unit 310 is arranged at a distance from the annular web 284 of the output shaft 224 in the working position.
  • Figure 42 shows the holding device 300 of FIG Figure 41 and preferably illustrates a gap-free arrangement of screw element 270 on magnet 330 .
  • Figure 43 shows the holding device of 41 and 42 in the parking position.
  • the magnet 330 In the parking position, the magnet 330 is displaced axially in the direction of the free axial end 403 of the second holding unit 320 in such a way that the second holding unit 320 releases the screwdriver bit 170 .
  • a tool change can thus take place in the parking position.
  • An element 1397 forms a stop surface for the magnet 330 in the parking position.
  • the magnet 330 is designed in such a way that it forms such a strong magnetic connection with the stop surface 1397 that a release of the magnet 330 from the stop surface 1397 due to a spring force of the spring element 410 is prevented. Only when a user acts on it detaches the magnet 330 from the stop surface 1397 and moves the second holding unit 320 into the working position.
  • the free axial end 1398 of the output shaft 224 is preferably designed as a stop surface 1397 for the magnet 330 .
  • Element 1397 is illustratively designed as a stop surface of output shaft 224, but element 1397 can also be another component that is arranged in the area of the free axial end 1398 of output shaft 224 or can be arranged on the free axial end 1398 of output shaft 224.
  • the axial end 1399 of the inner receptacle 432 of the second holding unit 320 that faces the first holding unit 310 is preferably in contact with the annular web 284 of the output shaft 224 in the parking position.
  • the second holding unit 320 is preferably designed in such a way that the magnet 330 rests without a gap, ie directly against the annular web 284 .
  • the magnet 330 is in contact with the annular web 284, it is preferred no further element of the holding device 300 on the output shaft 224 and/or the first holding unit 310.
  • Figure 44 shows the holding device 300 of FIG Figure 43 .
  • the side 830 of the screw element 270 arranged on the holding device 300 that faces the magnet 330 is preferably arranged at a distance from the side 829 of the magnet 330 that faces the screw element 270 .
  • the screwdriver bit 170 is thus released and an insert tool can be changed.
  • the magnet 330 is preferably in contact with the stop surface 1397 of the output shaft 224 and forms a magnetic connection, so that the holding device 300 remains arranged in the parking position.
  • the magnet 330 preferably holds the holding device 300 in the parking position.
  • An insert tool can thus be changed in which a user of the holding device 300 does not have to act on the second holding device 320 during the insert tool change.
  • Figure 45 shows the holding device 300 of FIG 32 to 44 with an alternative arrangement of the magnet 330 associated with the second holding unit 320.
  • the receptacle 436 for arranging the magnet 330 is analogous to the arrangement of the magnet in FIG 40 to 44 , preferably arranged on an axial end 404 of the second holding unit 320 that faces the first holding unit 310 . According to the alternative arrangement of the magnet 330, it is fixed in the receptacle 436 via a clamping sleeve 1440.
  • the clamping sleeve 1440 preferably has a cylindrical base body 1442 with a first end 1441 facing the first holding unit 310 and an axial end 1443 facing the magnet 330 . Furthermore, the clamping sleeve 1440 has at least one first clamping element 1446 and at least one second clamping element 1444. The at least one first clamping element 1446 is preferably arranged on the inner circumference of the cylindrical base body 1442. The at least one first clamping element 1446 is designed as an annular collar. The at least one first clamping element 1446 is preferably provided at the second end 1443 of the clamping sleeve 1440 and is designed to act on the magnet 330 in the receptacle 436.
  • the at least one second clamping element 1444 is preferably arranged at the first end 1441.
  • the at least one second clamping element 1444 is on the outer circumference of the Clamping sleeve 1440 formed.
  • the at least one second clamping element 1444 is preferably embodied as an annular collar.
  • the second holding unit 320 preferably comprises at least one fixing element 1452.
  • the fixing element 1452 is preferably designed as a receptacle.
  • the at least one fixing element 1452 is embodied as an annular groove for arranging the at least one second clamping element 1444 of the clamping sleeve 1440.
  • the at least one fixing element 1452 is preferably arranged on an end of the interior receptacle 432 of the second holding unit 320 that faces the first holding unit 310.
  • the at least one first clamping element 1446 preferably fastens the magnet 330 to the second holding unit 320, and the at least one second clamping element 1444 preferably forms an operative connection with the fixing element 1452.
  • the active connection is preferably designed as a positive and/or non-positive connection.
  • the magnet 330 preferably projects beyond the receptacle 436 in sections, and the clamping sleeve 1440 has a receptacle at its second end 1443 for arranging the section of the magnet 330 that projects beyond the receptacle 436 .
  • the second axial end 1143 of the clamping sleeve preferably rests against a shoulder 1454 that steps down the receptacle 436 .
  • an axial end 1449 of the magnet 330 facing the second end 1443 of the clamping sleeve 1440 is in contact with the at least one first clamping element 1446. It is pointed out that the magnet 330 can also be acted upon at its axial end 1449 from an end face arranged at the second axial end 1443 .
  • Figure 46 shows the holding device 300 of FIG Figure 45 .
  • Figure 46 the arrangement of the clamping sleeve 1440 in the interior receptacle 432 of the second holding unit 320.
  • the at least one first clamping element 1446 acts on the magnet 330 at its axial end 1449 against the holding section 1434 of the second holding unit 320 formed on the free end 402.
  • the clamping sleeve 1440 is through the operative connection between the at least one second clamping element 1444 of the clamping sleeve 1440 and the fixing element 1452 of the inner receptacle 432 is fixed in the inner receptacle 432.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP19151548.5A 2018-01-24 2019-01-14 Haltevorrichtung für eine handwerkzeugmaschine Active EP3517247B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018201090.0A DE102018201090A1 (de) 2018-01-24 2018-01-24 Haltevorrichtung für eine Handwerkzeugmaschine

Publications (2)

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EP3517247A1 EP3517247A1 (de) 2019-07-31
EP3517247B1 true EP3517247B1 (de) 2022-12-21

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EP (1) EP3517247B1 (zh)
CN (1) CN110065023B (zh)
DE (1) DE102018201090A1 (zh)

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Publication number Priority date Publication date Assignee Title
DE102019131292A1 (de) * 2019-11-20 2021-05-20 Metabowerke Gmbh Vorrichtung zum Einspannen eines Bearbeitungswerkzeugs in einem Elektrohandwerkzeuggerät

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DE8230242U1 (de) * 1982-10-28 1983-01-27 Stephan Witte Gmbh & Co Kg, 5860 Iserlohn Abstandshaltervorrichtung fuer schraubendrehervorsaetze fuer bohrmaschinen
US5586847A (en) * 1995-06-06 1996-12-24 Mattern, Jr.; Charles J. Power tool adapter
US5564717A (en) * 1995-07-19 1996-10-15 Alberts; Eric Removable adapter for a power-driven screwdriver
CN2307659Y (zh) * 1997-08-28 1999-02-17 屠恒灿 多功能电动螺丝刀
US6079716A (en) * 1997-12-12 2000-06-27 Black & Decker Inc. Removable chuck
DE20015641U1 (de) * 2000-09-09 2000-12-21 Aesculap Ag & Co Kg Schraubendreher für Knochenschrauben
WO2004106007A1 (en) * 2003-05-27 2004-12-09 Robert Bosch Tool Corporation Screw holding and driving device
US7757590B2 (en) * 2006-06-23 2010-07-20 Darian Swartz Fastener holding device
KR20100007700U (ko) * 2009-01-22 2010-07-30 박여웅 나사홀더
KR20110085738A (ko) * 2010-01-21 2011-07-27 주식회사성수프론티어 석면 해체 드라이버용 나사 해체 고정구
US9028088B2 (en) * 2010-09-30 2015-05-12 Black & Decker Inc. Lighted power tool
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DE102016206050A1 (de) * 2016-04-12 2017-10-12 Robert Bosch Gmbh Handwerkzeugmaschine mit einer elektronischen Drehmomentbegrenzungseinheit

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CN110065023A (zh) 2019-07-30
EP3517247A1 (de) 2019-07-31
CN110065023B (zh) 2023-05-02
DE102018201090A1 (de) 2019-07-25

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