EP3720659B1 - Machine-outil portative comprenant un dispositif de réglage de mode - Google Patents

Machine-outil portative comprenant un dispositif de réglage de mode Download PDF

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Publication number
EP3720659B1
EP3720659B1 EP18808336.4A EP18808336A EP3720659B1 EP 3720659 B1 EP3720659 B1 EP 3720659B1 EP 18808336 A EP18808336 A EP 18808336A EP 3720659 B1 EP3720659 B1 EP 3720659B1
Authority
EP
European Patent Office
Prior art keywords
mode
gear
torque
power tool
setting
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
EP18808336.4A
Other languages
German (de)
English (en)
Other versions
EP3720659A1 (fr
Inventor
Thomas Duerr
Istvan Munkacsi
Tibor Bohos
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
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3720659A1 publication Critical patent/EP3720659A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • 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
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0023—Tools having a percussion-and-rotation mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0038—Tools having a rotation-only mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/165—Overload clutches, torque limiters

Definitions

  • the present invention relates to a hand-held power tool with a housing in which a drive motor and a gear that can be driven by the drive motor for driving an output shaft are arranged, with a mode setting device being provided which has at least one rotatable actuating element for setting the operating mode, a torque setting element for setting the torque and a gear changeover element for Having gear shifting of the transmission.
  • a handheld power tool of this type designed as a drill and impact drill is known from the prior art.
  • the hand-held power tool has a drive motor arranged in a housing and a gear.
  • the drive motor drives the gearbox to drive an output shaft.
  • the hand-held power tool can be set to different operating modes, e.g. a screwing mode, a drilling mode and a percussion drilling mode.
  • the handheld power tool has a mode setting device provided with a rotatable actuating element. By rotating the actuating element, an operating mode is set, in which a torque setting assigned to the respective operating mode, a gear setting of the transmission and optionally an activation/deactivation of a percussion mechanism takes place.
  • a torque setting and a gear change take place via an inner contour assigned to the actuating element.
  • the EP 2 062 697 A1 describes a screwdriver with a housing and a motor, which is coupled via a gear with an output element.
  • the present invention provides a hand-held power tool with a housing in which a drive motor and a gear that can be driven by the drive motor for driving an output shaft are arranged, with a mode setting device being provided which has at least one rotatable actuating element for setting the operating mode, a torque setting element for setting the torque and a gear shifting element for changing gears of the transmission.
  • the torque setting element and the gear shifting element are detachably coupled to each other during gear shifting.
  • the invention thus makes it possible to provide a hand-held power tool in which simple and safe operation of the mode setting device can be made possible by the detachable coupling of the torque setting element to the gear shifting element.
  • a single actuating element can thus be provided in a simple manner, by means of which an automatic gear change can be made possible.
  • the torque setting element and the gear shifting element are preferably decoupled from one another when the torque is set.
  • the gear ratio can thus be arranged unchanged in first gear in a simple and uncomplicated manner over an entire adjustable torque setting range, including a maximum torque position of the torque setting element.
  • the mode setting device has a coupling element which is movably arranged on the torque setting element. A compact and robust coupling can thus be made possible.
  • the coupling element is arranged pivotably on the torque setting element.
  • a suitable arrangement of the coupling element can thus be made possible in a simple and uncomplicated manner.
  • the coupling element is preferably arranged on the torque setting element in an axially movable manner.
  • An alternative arrangement of the coupling element can thus be made possible in a simple manner.
  • the coupling element preferably has a guide element which, when the actuating element rotates, interacts with a guide track fixed to the housing.
  • the guide element is preferably formed in the radial direction of the mode setting device. A robust and reliable guidance of the guide element in the guideway can thus be made possible.
  • the guide track is formed in the circumferential direction on an inner surface of the housing. A compact and uncomplicated arrangement of the guideway can thus be made possible.
  • the gear shifting element is preferably rotatably mounted.
  • a rotational movement of the actuating element can be transmitted to the gear shifting element for gear shifting.
  • a torque limiting device is preferably provided, with the torque setting element interacting with the torque limiting device. Activation and/or deactivation of the torque limiting device via the mode setting device can thus be made possible in a simple manner.
  • a hammer mechanism is provided, with the mode setting device being designed to activate and/or deactivate the hammer mechanism.
  • the mode setting device being designed to activate and/or deactivate the hammer mechanism.
  • the transmission is preferably designed in the manner of a planetary gear with a switching ring gear that can be displaced via a shift bracket, the gear shifting element having an actuating element for actuating the shift bracket at least during a gear change.
  • a gear change can thus be made possible in a simple and reliable manner.
  • the gear shifting element is preferably assigned a mode display element which, when the operating mode is set, in the longitudinal direction of the housing is moved and a respectively assigned operating mode is visualized.
  • a currently set operating mode can thus be made clear to a user in a simple and uncomplicated manner.
  • the mode display element is preferably designed as an actuation element for actuation of the switch bracket and/or for mode display.
  • a suitable mode display element can thus be provided in a simple manner.
  • the gear shifting element has a guide pin and the mode indicator element has a guide groove, the guide pin moving the mode indicator element along the guide groove when an operating mode is set.
  • a simple and space-saving operating mode display can thus be provided.
  • FIG. 1 shows an exemplary hand-held power tool 100 with a housing 110 in which at least one drive motor 120 for driving an insertable tool that can be arranged in a tool holder 180 and is preferably exchangeable is arranged.
  • Control electronics 140 are preferably assigned to hand-held power tool 100 at least for controlling drive motor 120 .
  • the tool holder 180 is illustratively designed as a chuck attachment with three clamping jaws 182, 184, for example, but could also be designed as a quick-action chuck.
  • the housing 110 preferably has a handle 126 with a manual switch 117 .
  • the drive motor 120 can be actuated, ie switched on and off, for example via the hand switch 117, and preferably electronically controlled or regulated in such a way that both reverse operation and specifications with regard to a desired rotational speed can be implemented.
  • a direction of rotation switch 116 is preferably arranged in the area of the manual switch 117, via which a direction of rotation of the drive motor 120 or of an output shaft assigned to the drive motor 120 (205 in 2 ) is adjustable.
  • the handheld power tool 100 can preferably be connected to a battery pack 130 for mains-independent power supply, but can alternatively also be operated mains-dependent.
  • the hand-held power tool 100 preferably has a switchable transmission 150 that can be switched between at least a first and a second gear.
  • Gear 150 is preferably designed in the manner of a planetary gear.
  • Hand-held power tool 100 is preferably designed in the manner of a percussion drill or drill/screwdriver, with the first gear corresponding to a screwdriving mode, for example, and the second gear to a drilling and/or percussion drilling mode.
  • the screwing mode is assigned to the first gear
  • the drilling mode and the hammer drilling mode are assigned to the second gear.
  • a mode setting device 160 is preferably used to set the various operating modes.
  • An operating mode can preferably be set by rotating the mode setting device 160 in the circumferential direction.
  • an operating mode setting, a torque setting and/or a gear change can take place by rotating the mode setting device 160 in the circumferential direction.
  • the mode setting device 160 is assigned a mode display element 170 which is designed to visualize a set operating mode, torque and/or a gear stage.
  • the mode display element 170 is illustratively arranged on a top side of the housing 110 or on a side of the housing 110 opposite the handle 126 . However, the mode display element 170 could also be arranged at any other location on the hand-held power tool 100 .
  • FIG 2 shows the handheld power tool 100 from FIG 1 with the housing 110 in which the drive motor 120 and the drive motor 120 can be driven gear 150 for driving an output shaft 205 are arranged.
  • the housing 110 preferably has two housing shells 111, with 2 only one of the two housing shells 111 is shown to illustrate the mode setting device 160 .
  • At least one rotatable actuating element 240 for setting the operating mode, one torque setting element 220 for setting the torque, and/or one gear shifting element 230 for shifting gears of transmission 150 is preferably assigned to mode setting device 160 .
  • the operating element 240 is assigned to the mode setting device 160 for setting the various operating modes.
  • the actuating element 240 is preferably rotatably connected to the mode setting device 160 such that a rotation of the actuating element 240 in the circumferential direction 204 results in an operating mode setting, a torque setting and/or a gear shift.
  • the torque adjustment member 220 is non-rotatably connected to the actuating member 240 .
  • the torque setting element 220 preferably has an annular base body 221 .
  • the torque setting element 220 preferably has a coupling element 222 on its side facing the drive motor 120 .
  • the mode setting device 160 preferably has the coupling element 222 which is movably arranged on the torque setting element 220 .
  • the coupling element 222 is preferably arranged pivotably on the torque setting element 220 .
  • the coupling element 222 is preferably designed as an in particular elastic coupling arm 223 .
  • the coupling element 222 is formed in the direction of the drive motor or at least in the longitudinal direction 206 of the housing 110 .
  • the coupling element 222 is formed in the longitudinal direction 206 of the housing 110 and in the circumferential direction 204 of the housing 110, wherein the coupling element 222 has a first section 225 formed in the longitudinal direction 206 and a second section 227 formed in the circumferential direction 204.
  • the coupling element 222 in particular the second section 227, preferably has a coupling recess 226 for coupling to the gear shifting element 230.
  • the coupling recess 226 preferably engages in a coupling projection 236 of the gear shifting element 230 during coupling.
  • the coupling element 222 preferably has a guide element 224, preferably on the second section 227.
  • the guide element 224 is preferably formed in the radial direction 202 of the mode setting device 160 or radially outwards towards the housing 110 .
  • the guide element 224 preferably interacts with a guide track 266 fixed to the housing when the actuating element 240 rotates.
  • the guide track 266 is preferably formed in the circumferential direction 204 on an inner surface 219 of the housing 110 .
  • the guide track 266 is formed on an inner surface 219 of a housing shell 111 .
  • the guide track 266 is preferably formed by at least two housing ribs 260 fixed to the housing.
  • a guide web 262 fixed to the housing and a decoupling web 264 preferably form the guide track 266 .
  • the gear shifting element 230 preferably has an annular base body 231 and is preferably rotatably mounted.
  • the base body 231 has a stepped area 238 at least in sections, it being possible for the coupling arm 223 of the torque setting element 220 to be arranged in the stepped area 238 .
  • the base body 231 has the coupling projection 236, the coupling recess 226 of the torque setting element 220 preferably engaging in the coupling projection 236 during coupling.
  • the base body 231 has at least one expansion area 237 formed in the longitudinal direction 206 of the housing 110 on its end facing the torque setting element 220 .
  • the expansion area 237 is preferably used as a deactivation element for an optional striking mechanism (510 in figure 5 ) and is hereinafter referred to as "deactivation element 239".
  • the gear shifting element 230 or the base body 231 preferably has an expanded region 232 formed in the longitudinal direction 206 of the housing 110 at its end facing the drive motor 120 .
  • the extended area 232 preferably has a link track 234 .
  • a guide pin (374 in 3 ) of a loading element 270 is arranged.
  • the application element 270 is preferably designed to bring about a gear change of the transmission 150 embodied as a planetary gear, for example.
  • the planetary gear is equipped with a ring gear (547 in figure 5 ) educated.
  • the application element 270 is designed to act on the shift bracket 254 at least during a gear shift.
  • the switch bracket 254 is preferably designed as a wire bracket.
  • the transmission 150 is arranged in a transmission housing 250, which preferably has a first and second transmission housing part 252, 253.
  • the first gear housing part 252 is illustratively arranged facing the drive motor 120 and the second gear housing part 253 is arranged facing the torque setting element 220 .
  • the gear shifting element 230 is preferably assigned the mode display element 170, which is moved in the longitudinal direction 206 of the housing 110 when an operating mode is set and visualizes or clarifies a respectively assigned operating mode.
  • the housing 110 illustratively the housing shell 111, has a recess 212 for visualizing the current operating mode.
  • the mode display element 170 has a guide area 172 with a guide recess 174 for visualizing the current operating mode.
  • a guide pin (332 in 3 ) in the guide recess 174 can be arranged.
  • the torque setting element 220 and the gear shifting element 230 are detachably coupled to one another when shifting gears. Furthermore, the torque setting element 220 and the gear shifting element 230 are decoupled from one another when the torque is set.
  • the coupling element 222 preferably detachably couples the torque setting element 220 and the gear shift element 230 . Furthermore, the coupling element 222 is preferably movably arranged on the torque setting element 220 such that when a gear is shifted, the torque setting element 220 is coupled to the gear shifting element 230 and/or preferably when the torque is set, the torque setting element 220 is decoupled from the gear shifting element 230.
  • FIG 3 shows the mode setting device 160 of FIG 2 with the torque setting element 220 and the gear shifting element 230, as well as the exemplary planetary gear 150 arranged in the gear housing 250 3 the coupling projection 236 of the base body 231, the coupling recess 226 of the torque setting element 220 being arranged on the coupling projection 236. Furthermore clarified 3 a guide pin 332 assigned to the extended area 232 of the gear shifting element 230 and which can be arranged in the guide recess 174 of the mode display element 170 .
  • the activating element 270 shows 3 a guide pin 374 of the activating element 270 arranged in the link track 234.
  • the activating element 270 is arranged in a receptacle 352 of the first transmission housing part 252.
  • the activating element 270 preferably has a recess 372 for arranging the switch bracket 254 in sections.
  • FIG 4 shows one of the preferably two housing shells 111 of the housing 110 of the hand-held power tool 100 from FIG 1 .
  • figure 5 shows the mode setting device 160 of FIG 3 with the torque setting element 220 and the gear shifting element 230 as well as the transmission 150.
  • the planetary gear 150 preferably has at least a first and second, illustratively a first, second and third planetary stage 542, 544, 546, which illustratively enable operation of the planetary gear 150 in a first and a second gear stage.
  • each gear step is preferably assigned to a corresponding operating mode, for example a screwing mode, drilling mode and/or an impact drilling/impact screwing mode.
  • a tightening mode may be provided for performing a torque-limiting tightening operation in a first gear while a drilling operation and/or a drilling or Screwdriving operation with an impact function is intended to be carried out in a second gear, etc.
  • the planetary gear 150 preferably has an axially displaceable switching element 547, which is preferably designed as a ring gear and is referred to below as “ring gear 547”.
  • the switching ring gear 547 is preferably displaceable between at least two axial positions, one axial position being assigned to a gear step.
  • ring gear 547 is designed as a ring gear of the second planetary gear stage, but alternatively ring gear 547 can also be designed as an additional ring gear of planetary gear 150 .
  • a detailed description of the gear 150 is omitted here for the sake of simplicity of the description.
  • the gear-shifting element 230 is preferably rotated, as a result of which the guide pin 374 of the activating element 270 preferably moves along the link path 234 .
  • the activating element 270 is moved axially, as a result of which the switching clip 254 moves the switching ring gear 547 axially or a gear change takes place.
  • clarified figure 5 an optional percussion mechanism 510, illustratively designed as a notched percussion mechanism, which can preferably be activated in percussion drilling mode.
  • a notched hammer mechanism is only of an exemplary nature and is not to be seen as a limitation of the invention.
  • the hammer mechanism 510 can also be designed as any other hammer mechanism, for example as a wobble hammer mechanism.
  • a locking element 518 is provided for activating and/or deactivating the hammer mechanism 510 or a corresponding hammer drilling mode.
  • the locking element 518 is preferably acted upon by deactivation elements 239 of the gear shifting element 230 at an end of the gear shifting element 230 facing the drive shaft 205 .
  • the locking element 518 can be moved in the axial direction and the impact mechanism 510 is activated.
  • Gear shifting element 230 is preferably coupled, at least in one operating mode, to a transmission element 529 that is mounted on transmission housing part 253 .
  • the transmission element 529 In a screwing position assigned to the screwing mode, the transmission element 529 is preferably mounted in an axially displaceable manner on the gear housing part 253 and is fixed axially on the gear housing part 253 in the hammer drilling and drilling mode assigned hammer drilling and drilling positions.
  • the transmission element 529 is disk-shaped in the manner of a pressure plate or a pressure plate and is referred to below as “pressure plate 529”.
  • the pressure plate 529 is preferably in contact with the transmission housing part 253 on its side facing the output shaft 205 .
  • the pressure plate 253 is preferably connected to the transmission housing part 253 in a rotationally fixed manner.
  • the mode setting device 160 in particular the gear shifting element 230, preferably has at least one blocking element 299, via which the pressure plate 529 is axially fixed in the associated hammer drilling or drilling position on the transmission housing part 253 in the percussion drilling or drilling mode.
  • the at least one blocking element 299 preferably releases pressure plate 529 in the axial direction.
  • the at least one blocking element 299 is preferably arranged on a side of gear shifting element 230 that faces torque setting element 220 or output shaft 205.
  • the at least one blocking element 299 is preferably formed in one piece with the gear shifting element 230.
  • hand-held power tool 100 has an optional torque-limiting unit 520 .
  • the optional torque limiting unit 520 is preferably assigned to the torque setting element 220 .
  • the torque limiting unit 520 is preferably activated in the first operating mode, preferably the screwing mode of the hand-held power tool 100, since the transmission element 529 is preferably released in the screwing mode and can therefore be moved axially.
  • the transmission element 529 is preferably coupled to the torque limiting unit 520 . If the maximum transmittable value set by the torque limiting unit 520, in particular the torque setting element 220, is exceeded torque, the transmission element 529 moves axially and decouples the transmission 150 from the output shaft 205.
  • a maximum transmittable torque can preferably be set by the torque setting element 220 or the actuating element 240 .
  • the torque setting element 220 is preferably non-rotatably connected to the actuating element 240 .
  • the torque setting element 220 is preferably fixed in position axially on the transmission housing part 253 .
  • the torque setting element 220 preferably has an internal thread 524 for setting the maximum torque that can be transmitted, which thread engages in an external thread 522 of a spring holder 526 .
  • the spring holder 526 preferably has at least one holding section 597, which is preferably formed in the direction of the transmission 150.
  • the at least one holding section 597 is designed for arranging at least one spring element 527.
  • the at least one spring element 527 is designed to act on transmission element 529.
  • the at least one spring element 527 is preferably compressed when the set, maximum transmissible torque is exceeded, so that the transmission element 529 can move axially and can preferably decouple the transmission 150.
  • the spring retainer 526 is preferably seated on the gear housing part 253 in a rotationally fixed but axially movable manner.
  • the retaining plate 599 preferably encompasses the output shaft 205 and presses a detent spring holder 532 against an annular shoulder 535 in the torque setting element 220.
  • the torque setting element 220 is thus preferably also secured axially on the transmission housing part 253.
  • the torque setting element 220 In order for the torque setting element 220 to latch in discrete latching positions when rotated to set a maximum transmissible torque, it is preferably subjected to a force by a latching spring element 534 .
  • the detent spring element 534 is preferably held on the detent spring holder 532 .
  • the detent spring holder 532 and the detent spring element 534 are preferably arranged in an interior space encompassed by the torque setting element 220 .
  • the detent spring element 534 preferably engages in discrete angular positions in that, for example, a detent contour on an inner side of the torque setting element 220 facing the output shaft 205 is acted upon by the detent spring element 534 .
  • the output shaft 205 is preferably adjusted between a percussion drilling position and a drilling or screwing position by means of an axial adjusting movement.
  • the output shaft 205 can be figure 5 illustratively shifted to the left, that is, into the transmission housing part 253 .
  • the locking cup 512 preferably comes into locking engagement with a locking disk 514, which is preferably seated in a rotationally fixed manner on the lateral surface of the output shaft 205 and forms a locking mechanism with the locking cup 512.
  • the locking disk 514 also has the task of axially fixing the ball bearing 519, which is also seated on the lateral surface of the output shaft 205, on the latter.
  • a spring element 516 is preferably arranged inside the locking cup 512, which applies a force to the output shaft 205 via the locking element 518 and the ball bearing 519 into an associated disengaged position in which the locking cup 512 and the locking disk 514 are not engaged.
  • the pressure plate 529 preferably has an annular base body.
  • portions 582 formed radially inward are formed on an inner periphery of the pressure plate 529 .
  • a section 583 is preferably arranged between two adjacent sections 582, with the sections 582 each being formed further radially inwards than the sections 583. This results in an arrangement of the pressure plate 529 which is preferably fixed in the circumferential direction but can be moved axially.
  • Each section 282 is assigned a recess 257 .
  • the pressure plate 257 has on its outer surface projections 581 which are preferably formed radially outwards, with a receiving area 584 being formed between two projections 581 .
  • the gear shifting element 230 preferably has at least one, illustratively and preferably three, blocking elements 299, with a receptacle 298 being formed between each two blocking elements 299. Fix the blocking elements 299 preferably the pressure plate 529 in the percussion drilling or drilling mode on the transmission housing part 253 axially, with a projection 581 being present on a blocking element 299 in each case. In the screwing mode, the blocking elements 299 preferably release the pressure plate 529 in the axial direction.
  • the projections 281 are arranged in the receptacles 298 and the pressure plate 529 can be moved axially, as a result of which the torque limiting unit 520 is activated.
  • the detent spring element 534 which is assigned to the detent spring holder 532. As described above, the detent spring element 534 preferably acts on the torque setting element 220 when rotated in order to set a maximum transmissible torque in the discrete detent positions.
  • the locking element 518 which has an annular base body 511, which is designed for arranging the locking element 518 on the output shaft 205. At least one, illustratively three, legs 517 are arranged on the base body 511 and are formed radially outwards. Such a locking element 518 is also known as a so-called tripod.
  • the locking element 518 In the screwing and/or drilling mode, the locking element 518 is acted upon by the deactivation element 239 of the gear shifting element 230 and an axial movement of the locking element 518 is prevented, as a result of which the percussion mechanism 510 is deactivated.
  • the locking element 518 or the legs 517 are arranged in the receptacles 298 and can therefore be moved axially, so that the percussion mechanism 510 is activated.
  • the first operating mode is preferably a screwing mode. This makes it clear 7 the arranged in the coupling recess 226 coupling projection 236 of the gear shifting element 230. According to 7 a first gear of the transmission 150 active.
  • FIG 8 shows the handheld power tool 100 from FIG 7 in another operating mode.
  • gear shifting element 230 in FIG 8 rotated in the circumferential direction 204 to 7 arranged.
  • Preferred is the mode of operation shown a drill or percussion mode in which a second gear ratio of the transmission 150 is activated. This makes it clear 8 the guide pin 332 arranged in the guide recess 174 of the mode display element 170.
  • FIG 9 shows the handheld power tool 100 from FIG 1 seen from above and illustrates the recess 212 for visualizing the current operating mode. Furthermore shows 9 a marking 630 for visualizing a current operating mode on the actuating element 240.
  • the marking 630 is illustratively designed as a triangle, but could also have any other shape.
  • the mode display element 170 visualizes an exemplary screw symbol 614, which is assigned to the screwing mode, through the recess 212.
  • the actuating element 240 preferably has a setting mark 620 on its outer circumference.
  • the setting mark 620 preferably has a first setting area 622 for setting a maximum torque that can be transmitted.
  • the torque setting range 622 is preferably visualized by lines that become larger in the circumferential direction 204 .
  • an adjustable torque variable can also be visualized in another way, for example by torque values in the form of numerical values.
  • 11 shows the handheld power tool 100 from FIG 9 and 10 in a second operating mode designed as a drilling mode.
  • the mode display element 170 visualizes an exemplary drill symbol 612 through the recess 212, which is assigned to the drilling and/or percussion drilling mode.
  • the actuating element 240 has an adjustment area 624 associated with the optional drilling mode on its adjustment marking 620 .
  • the setting area 624 visualizes the drilling mode by a drill.
  • the setting area 626 visualizes the impact drilling mode by a hammer. It is pointed out that the different setting ranges 622-626 can also be visualized by any other symbols, for example by letters.
  • mode setting device 700 shows the mode setting device 160 of FIG Figures 1 to 8 , which is designed according to a further embodiment and is referred to below as mode setting device 700 .
  • the mode setting device 700 is assigned an actuating element 740 with a torque setting element 721, a gear shifting element 730 and a mode display element 770.
  • the same components of the two embodiments of the handheld power tool 100 with the mode setting device 160 or 700 are numbered the same.
  • the transmission 150 which is preferably designed as a planetary transmission, is found in FIG Figures 1 to 11 also application in the in 12 shown embodiment of the mode setting device 700.
  • the torque setting element 72 analogous to the torque setting element 220 of Figures 2 to 11 , preferably associated with a coupling element 720, which preferably has a guide element 725, which interacts with the housing-fixed guideway 266 of the housing 110 or the housing shell 111 when the actuating element 740 rotates.
  • the guide element 725 is formed in the radial direction 202 of the mode setting device 700 , analogously to the guide element 224 .
  • the coupling element 720 is designed as a coupling ring 722.
  • the guide element 725 and/or a coupling projection 724 is preferably assigned to the coupling ring 722 .
  • the coupling projection 724 preferably engages, analogously to the coupling projection 236 of the gear shifting element 230 Figures 2 to 11 , when coupling into a coupling recess 736 of the gear shifting element 730.
  • the coupling projection 724 is preferably designed in the manner of a parallelogram, but can also have any other shape.
  • the guide element 725 and the coupling projection 724 are preferably formed in one piece, with the coupling ring 722, the guide element 725 and the coupling projection 724 preferably being formed in one piece.
  • the coupling element 720 is preferably arranged so that it can move axially on the torque setting element 721 . Preferred are in the in 12 shown embodiment, the torque setting element 721 and the actuating element 740 integrally formed.
  • the gear shifting element 730 preferably has an annular base body 731 and is preferably rotatably mounted.
  • the base body 731 has a stepped area 738 at least in sections, it being possible for the coupling ring 722 to be arranged in the stepped area 738 .
  • the base body 731 has the coupling recess 736 .
  • the coupling recess 736 is preferably of rectangular design, but can also have a different shape associated with the coupling projection 724 .
  • the base body 731 has at least one region 737 formed in the longitudinal direction 206 of the housing 110 on its end facing the coupling ring 720 .
  • the area 737 is preferably designed as a deactivation element for the percussion mechanism 510 and is referred to below as “deactivation element 739”.
  • the area 737 has at least one blocking element 795, which is designed to release the pressure plate 529 in the axial direction in the screwing mode, as a result of which the torque limiting unit 520 is preferably activated.
  • the gear shifting element 730 or the base body 731 has an expanded region 734 formed in the longitudinal direction 206 of the housing 110 at its end facing the transmission 150 .
  • the extended area 734 has a guide pin 732 .
  • the mode indicator element 770 preferably has a guide groove 912, with the guide pin 732 moving the mode indicator element 770 along the guide groove 912 when an operating mode is set.
  • the mode display element 770 is moved in the longitudinal direction 206 of the housing 110 and a respectively associated operating mode is preferably visualized.
  • the mode display element 770 has the drill symbol 612 by way of example 11 for visualizing a drill mode and the screw icon 614 from 10 to visualize a tightening mode.
  • an application element 779 is assigned to the mode display element 770, which is designed to act on the shift bracket 254 of the planetary gear 150 during a gear change and thus to bring about a gear change.
  • the activating element 779 preferably has two activating webs 771, 773 which form a recess 772 for arranging the switching bracket 254.
  • the shift bracket 254 is acted upon by one of the two actuation webs 771, 773 only during a gear change.
  • the mode display element 770 is preferably designed as an actuation element 779 for actuation of the switch bracket 254 and/or for mode display of the set operating mode.
  • FIG 13 shows the mode setting device 700 of FIG 12 in a screwing mode in which the coupling projection 724 of the coupling ring 720 is arranged outside of the coupling recess 736 of the gear shifting element 730. Furthermore clarified 13 the guide pin 732 arranged in the guide groove 912 of the mode display element 770. In addition, the switching bracket 254 is arranged in the recess 772 in the screwing mode and rests on the actuating web 773 on the illustrative right.
  • FIG 14 shows the mode setting device 700 of FIG 13 seen from above in screwing mode. This makes it clear 14 the visualization of the screwing mode by the screw symbol 614, which is visible through the recess 212 arranged in the housing shell 111.
  • FIG 15 shows the preferably ring-shaped actuating element 740 of FIG 12 with the preferably integrated torque setting element 721 and the coupling ring 720 arranged in the actuating element 740 from 12 to 14 .
  • a direct torque adjustment can take place.
  • the actuating element 740 preferably has a receptacle 810 for arranging the coupling ring 720 on its side 802 facing the gear shifting element 730 .
  • the actuating element 740 or the receptacle 810 preferably has at least one, illustratively four, rotary driver webs 812 which interact with associated rotary receptacles 822 of the coupling ring 720.
  • the rotary mounts 822 are formed on an outer circumference 820 of the coupling ring 720 .
  • the rotary driver webs 812 preferably have a rectangular shape, but can also have any other shape, the rotary receptacles 822 associated shape.
  • the actuating element 740 or the receptacle 810 has at least one, illustratively three, recesses 814 for arranging a spring element (not shown).
  • the spring element is designed to act on the coupling ring 720 radially outwards or to act on the rotary driving webs 812 in the rotary recess 822 .
  • the recesses 814 are preferably arranged on a side of the receptacle 810 facing the inner circumference of the actuating element 740 and the rotational driving webs 812 are preferably arranged on a side of the receptacle 810 facing the outer circumference of the actuating element 740 .
  • 16 shows the actuator 740 of FIG 15 with the torque setting element 721 and the coupling ring 720. This clarifies 16 the internal thread 524 of the torque setting element 721. Also illustrated 16 the arrangement of the coupling ring 720 in the receptacle 810 of the actuating element 740.
  • 17 shows the mode setting device 700 of FIG 12 with the planetary gear 150 from figure 5 in a first grade. This makes it clear 17 the switch bracket 254 which is arranged in the recess 772 and which illustratively bears against the right-hand actuating web 773. Furthermore clarified 17 the internal thread 524 of the torque setting element 721 engaging in the external thread 522 of the spring holder 526.
  • 18 shows the handheld power tool 100 from FIG 1 with the mode setting device 700 of FIG Figures 12 to 17 in screwing mode.
  • the pressure plate 529 can move in the direction of a double arrow 798 in the axial direction against a spring force of the spring elements 527 assigned to the spring holder 526 .
  • the transmission 150 can be decoupled from the output shaft 205 when the maximum transmissible torque is exceeded.
  • an optional fan 830 which is preferably and exemplarily arranged between the drive motor 120 and the transmission 150.
  • the fan 830 could also be located at any other location be, e.g. at an end of the drive motor 120 facing away from the transmission 150.
  • FIG 19 shows the handheld power tool 100 from FIG 18 in screwing mode and illustrates the guide element 725 of the coupling ring 720 arranged in the guideway 266 fixed to the housing of the housing 110 or the housing shell 111.
  • a leg 517 associated with the locking element 518 which in 19 screw mode shown is acted upon by the deactivation element 739 of the gear shifting element 730 . This prevents an axial movement of the locking element 518, as a result of which the percussion mechanism 510 is deactivated.
  • the pressure plate 529 which can be moved axially in the direction of the double arrow 798.
  • the locking element 518 is arranged with its annular base body 511 on the output shaft 205 and illustratively one of the preferably three legs 517 is acted upon by the deactivation element 739 of the gear shifting element 730.
  • the leg 517 rests on a side 799 of the gear shifting element 730 that faces away from the transmission 150 .
  • gear-shifting element 730 with at least one, illustratively two, preferably three, blocking elements 795, with a receptacle 794 preferably being formed between each two blocking elements 795.
  • the locking element 518 or the legs 517 are preferably arranged in the receptacles 794 in the percussion drilling mode.
  • FIG 21 shows the mode setting device 700 of FIG 13 in a screwing mode.
  • the transmission 150 is in the first gear and the torque limiting unit 520 is activated and the percussion mechanism 510 is deactivated.
  • the actuating element 740 is rotated in the direction of an arrow 902 or in the circumferential direction.
  • FIG 22 shows the mode setting device 700 of FIG 13 that compared to 21 is rotated in the direction of arrow 902 or in the circumferential direction.
  • the guide element 725 of the coupling ring 720 is acted upon by the guide bar 262 in the guide track 266 fixed to the housing 110 or the housing shell 111 .
  • the guide element 725 is preferably acted upon by the decoupling web 264, with the coupling projection 724 being acted upon from the coupling recess 736.
  • FIG 23 shows the mode setting device 700 of FIG 13 that compared to 22 is rotated in the direction of arrow 902 or in the circumferential direction.
  • Guide element 725 of coupling ring 720 is guided along guide track 266 of housing 110 or housing shell 111 fixed to the housing, with coupling projection 724 being moved in the direction of arrow 904 or in the axial direction into coupling recess 736 of gear-shifting element 730.
  • the 24 shows the mode setting device 700, from FIG 13 the compared to 23 is rotated further in the direction of arrow 902 or in the circumferential direction.
  • the coupling projection 724 of the coupling ring 720 is arranged in the coupling recess 736 of the gear shifting element 730 .
  • the guide element 725 is preferably acted upon by the guide web 262 in order to enable a secure arrangement of the coupling projection 724 in the coupling recess 736.
  • the arrangement shown preferably illustrates a last position of the screwdriving mode with activated torque limiting device 520.
  • FIG 25 shows the handheld power tool 100 from FIG 18 in screwing mode with torque limiting device 520 deactivated.
  • torque limiting device 520 When torque limiting device 520 is deactivated, pressure plate 529 is axially fixed, with the at least one blocking element 795 preferably acting on pressure plate 529 and blocking an axial movement of pressure plate 529. Similar to the screwdriving mode with activated torque limiting device 520, impact mechanism 510 is deactivated.
  • FIG 26 shows the handheld power tool 100 from FIG 25 in the screwdriving mode with the torque limiting device 520 deactivated, with the percussion mechanism 510 being deactivated analogously to the screwdriving mode with the torque limiting device 520 activated.
  • the leg 517 of the locking element 518 facing away from the transmission 150 Page 799 of the gear shifting element 730, since this is acted upon by the deactivation element 739 of the gear shifting element 730.
  • FIG 27 shows the handheld power tool 100 from FIG 25 with the torque limiting device 520 deactivated 27 the projection 581 associated with the pressure plate 529, which is blocked by the blocking element 795, so that an axial movement of the pressure plate 529 is blocked.
  • FIG 28 shows the handheld power tool 100 from FIG 27 and illustrates those defined by area 737, particularly those defined by the in 28 not shown blocking element 795, blocked pressure plate 529.
  • the projections 581 associated with the pressure plate 529 are in contact with the area 737, as a result of which the axial movement of the pressure plate 529 is blocked.
  • clarified 28 also shows the arrangement of the pressure plate 529 via the sections 582 in the recesses 257 of the second transmission housing part 253 28 the loading of the pressure plate 529 by the spring elements 527 assigned to the spring holder 526.
  • the spring elements 527 preferably act in the region of the sections 582.
  • FIG 29 shows the mode setting device 700 of FIG 17 in the screwing mode or in the first gear of the transmission 150.
  • the guide pin 732 of the gear shifting element 730 is arranged in the guide groove 912 of the mode display element 770. When changing gears, the guide pin 732 moves along the guide groove 912 or in the direction of an arrow 906.
  • 30 shows the mode setting device 700 of FIG 17 , where compared to 29 the guide pin 732 in the direction of arrow 906 of FIG 29 or by rotating the actuating element 740 illustratively upwards. In 30 shows the last position before the gear shift to second gear.
  • FIG 31 shows the mode setting device 700 of FIG 17 in the second gear ratio of the transmission 150 or in a drilling mode.
  • the guide pin 732 is arranged at an illustratively upper end of the guide groove 912, as a result of which the shift bracket 254 has acted upon the transmission 150 from the first and the second gear.
  • the guide groove 912 preferably has an approximately stepped shape. Also clear 32 the two loading webs 771, 773, as well as the recess 772 for arranging the switching bracket 254.
  • Figure 33 shows the mode setting device 700 of FIG 17 in drilling mode or in the second gear of transmission 150.
  • actuating element 740 is rotated in the direction of arrow 902 or in the circumferential direction, with guide element 725 being moved along guide web 262 and guide pin 732 being guided along guide groove 912.
  • the mode display element 770 is displaced axially, with the actuating web 771 illustratively acting on the shift bracket 254 to the right and thus effecting a gear change.
  • the shift bracket 254 acts on the ring gear 547 into the position associated with the second gear.
  • the drilling mode through the recess 212 is visualized by the exemplary drilling machine symbol 612 .
  • 34 shows the handheld power tool 100 from FIG 25 in drilling mode in second gear of transmission 150 34 the ring gear 547 shifting from the first to the second gear ratio, the ring gear gear 547 being arranged in the second gear ratio in the illustrative left-hand position. Furthermore shows 34 the illustratively shifted to the right mode display element 770, wherein the switch bracket 254 is present on the actuating web 771. in 34 Drilling mode shown, the torque limiting device 520 and the impact mechanism 510 are preferably deactivated.
  • Figure 35 shows the handheld power tool 100 from FIG 34 in drilling mode.
  • the leg 517 of the locking element 518 on the side 799 of the gear shifting element 730 facing away from the transmission 150 since the leg 517 is acted upon by the deactivation element 739 of the gear shifting element 730.
  • the gear shifting element 730 in Figure 35 but arranged twisted in the circumferential direction.
  • Figure 36 shows the handheld power tool 100 from FIG 34 and Figure 35 in drilling mode and with the torque limiter 520 disabled Figure 36 analogous to 27 the projection 581 assigned to the pressure plate 529, which is blocked at least in sections by the blocking element 795 and thus blocks an axial movement of the pressure plate 529.
  • FIG 37 shows the handheld power tool 100 from FIG 18 in drilling mode and illustrates the pressure plate 529 blocked by the area 737.
  • the projections 581 associated with the pressure plate 528 are in sections on the area 737, as a result of which the axial movement of the pressure plate 529 is blocked.
  • 38 shows the handheld power tool 100 from FIG 18 in percussion drilling mode, wherein the gear shifting element 730 compared to the drilling mode of 37 is twisted further in the circumferential direction. This makes it clear 38 the ring gear 547 arranged in the second gear.
  • Figure 39 shows the handheld power tool 100 from FIG 38 in hammer drilling mode, in which the hammer mechanism 510 is activated.
  • the legs 517 of the locking element 518 are released from the deactivation element 739 of the percussion mechanism 510 .
  • the legs 517 are preferably arranged on the side 799 of the gear shifting element 730 facing away from the transmission 150, in particular in the receptacles 794 of the gear shifting element 730.
  • the locking element 518 can be moved in the direction of a double arrow 797 or in the axial direction.
  • the spring element 516 arranged within the locking cup 512 is preferably sequentially compressed and decompressed.
  • the spring element 516 preferably applies a force to the output shaft 205 via the locking element 518 and the ball bearing 519 into an associated disengaged position in which the locking cup 512 and the locking disk 514 are not engaged.
  • figure 40 shows the handheld power tool 100 from FIG 38 and Figure 39 in percussion mode with torque limiter 520 disabled figure 40 , analogous to 27 and Figure 36 , the projection 581 associated with the pressure plate 529, which is blocked at least in sections by the blocking element 795 and thus blocks an axial movement of the pressure plate 529.
  • Figure 41 shows the handheld power tool 100 from FIG figure 40 in percussion drilling mode and illustrates the pressure plate 529 blocked by the area 737.
  • the projections 581 associated with the pressure plate 528 are preferably in sections on the area 737, as a result of which the axial movement of the pressure plate 529 is blocked.
  • the gear-shifting element 230 of the first embodiment can be designed without a link track 234 and preferably have the direct mode setting device 700 of the second embodiment.
  • the gear shifting element 730 of the second embodiment can have a link track 234 and preferably have the indirect mode setting device 160 of the first embodiment.
  • the coupling elements 220 or 720 can also be used in the respective other embodiment.
  • the coupling element 220 can be used in the second embodiment or with the gear shifting element 730 with the preferably direct mode setting device 700 and/or the coupling element 720 can be used with the gear shifting element 230 of the first embodiment.
  • the torque setting element 220 can also be designed in one piece with the actuating element 240 in the first embodiment and/or the torque setting element 720 can be connected to the actuating element 740 in two parts, e.g. via a press connection.
  • the guide track 266 can also be pressed into the housing 110 via a housing shell, for example.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Portable Power Tools In General (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Structure Of Transmissions (AREA)

Claims (14)

  1. Machine-outil portative (100) avec un boîtier (110), dans lequel sont agencés un moteur d'entraînement (120) et un engrenage (150) pouvant être entraîné par le moteur d'entraînement (120) pour l'entraînement d'un arbre de sortie (205), un dispositif de réglage du mode (160) étant prévu, qui présente au moins un élément d'actionnement rotatif (240) pour le réglage du mode de fonctionnement, un élément de réglage du couple (220) pour le réglage du couple et un élément de changement de vitesse (230) pour le changement de vitesse de l'engrenage (150), l'élément de réglage du couple (220) et l'élément de changement de vitesse (230) étant couplés l'un à l'autre de manière détachable lors d'un changement de vitesse, caractérisée en ce que le dispositif de réglage du mode (160) présente un élément de couplage (222 ; 720) qui est agencé de manière mobile sur l'élément de réglage du couple (220) et couple ainsi celui-ci à l'élément de changement de vitesse (230) lors d'un changement de vitesse.
  2. Machine-outil portative selon la revendication 1, caractérisée en ce que l'élément de réglage du couple (220) et l'élément de changement de vitesse (230 ; 730) sont découplés l'un de l'autre lors d'un réglage du couple.
  3. Machine-outil portative selon la revendication 1 ou 2, caractérisée en ce que l'élément de couplage (222) est agencé de manière pivotante sur l'élément de réglage du couple (220) .
  4. Machine-outil portative selon la revendication 1 ou 2, caractérisée en ce que l'élément de couplage (720) est agencé de manière axialement mobile sur l'élément de réglage du couple (220) .
  5. Machine-outil portative selon l'une quelconque des revendications 1 à 4, caractérisée en ce que l'élément de couplage (222 ; 720) présente un élément de guidage (224 ; 725) qui, lors d'une rotation de l'élément d'actionnement (240), coopère avec une piste de guidage (266) solidaire du boîtier.
  6. Machine-outil portative selon la revendication 5, caractérisée en ce que l'élément de guidage (224) est réalisé dans la direction radiale (202) du dispositif de réglage du mode (160).
  7. Machine-outil portative selon la revendication 5 ou 6, caractérisée en ce que la piste de guidage (266) est réalisée dans la direction circonférentielle (204) sur une surface intérieure (219) du boîtier (110).
  8. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de changement de vitesse (230 ; 730) est monté de manière rotative.
  9. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un dispositif de limitation du couple (520) est prévu, l'élément de réglage du couple (220) coopérant avec le dispositif de limitation du couple (520).
  10. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un mécanisme de percussion (510) est prévu, le dispositif de réglage du mode (160) étant réalisé pour activer et/ou désactiver le mécanisme de percussion (510).
  11. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que l'engrenage (150) est réalisé à la manière d'un engrenage planétaire avec une couronne de commutation (547) pouvant être déplacée par l'intermédiaire d'un étrier de commutation (254), l'élément de changement de vitesse (230) présentant un élément de sollicitation (270) pour solliciter l'étrier de commutation (254) au moins lors d'un changement de vitesse.
  12. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de changement de vitesse (230) est associé à un élément d'affichage du mode (170 ; 770) qui est déplacé dans la direction longitudinale (206) du boîtier (110) lors d'un réglage du mode de fonctionnement et qui visualise un mode de fonctionnement respectivement associé.
  13. Machine-outil portative selon la revendication 12 ou selon les revendications 11 et 12, caractérisée en ce que l'élément d'affichage du mode (170 ; 770) est réalisé sous forme d'élément de sollicitation (270 ; 779) pour solliciter l'étrier de commutation (254) et/ou pour afficher le mode.
  14. Machine-outil portative selon la revendication 12 ou 13, caractérisée en ce que l'élément de changement de vitesse (230) présente une broche de guidage (332 ; 732) et l'élément d'affichage du mode (170 ; 770) présente une rainure de guidage (912), la broche de guidage (332 ; 732) déplaçant l'élément d'affichage du mode (170 ; 770) le long de la rainure de guidage (912) lors d'un réglage du mode de fonctionnement.
EP18808336.4A 2017-12-06 2018-11-26 Machine-outil portative comprenant un dispositif de réglage de mode Active EP3720659B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017222006.6A DE102017222006A1 (de) 2017-12-06 2017-12-06 Handwerkzeugmaschine mit einer Moduseinstelleinrichtung
PCT/EP2018/082473 WO2019110339A1 (fr) 2017-12-06 2018-11-26 Machine-outil portative comprenant un dispositif de réglage de mode

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EP3720659A1 EP3720659A1 (fr) 2020-10-14
EP3720659B1 true EP3720659B1 (fr) 2023-06-07

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US (1) US11413737B2 (fr)
EP (1) EP3720659B1 (fr)
CN (1) CN111465472B (fr)
DE (1) DE102017222006A1 (fr)
WO (1) WO2019110339A1 (fr)

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DE102023200535A1 (de) 2023-01-24 2024-07-25 Robert Bosch Gesellschaft mit beschränkter Haftung Handwerkzeugmaschine

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Also Published As

Publication number Publication date
EP3720659A1 (fr) 2020-10-14
WO2019110339A1 (fr) 2019-06-13
CN111465472B (zh) 2023-12-22
DE102017222006A1 (de) 2019-06-06
CN111465472A (zh) 2020-07-28
US20210187719A1 (en) 2021-06-24
US11413737B2 (en) 2022-08-16

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