EP3147077A1 - Machine-outil portative - Google Patents

Machine-outil portative Download PDF

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Publication number
EP3147077A1
EP3147077A1 EP15186196.0A EP15186196A EP3147077A1 EP 3147077 A1 EP3147077 A1 EP 3147077A1 EP 15186196 A EP15186196 A EP 15186196A EP 3147077 A1 EP3147077 A1 EP 3147077A1
Authority
EP
European Patent Office
Prior art keywords
gear
ring
ring gear
toothing
switching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15186196.0A
Other languages
German (de)
English (en)
Inventor
Jochen Erhardt
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Priority to EP15186196.0A priority Critical patent/EP3147077A1/fr
Priority to EP16189706.1A priority patent/EP3147078B1/fr
Publication of EP3147077A1 publication Critical patent/EP3147077A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • 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
    • 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

Definitions

  • the present invention relates to a hand tool, in particular an electric screwdriver.
  • the hand tool of the invention has a tool holder for holding a tool, an electric motor for driving the tool holder and a switchable planetary gear, which is connected in a transmission housing between the tool holder and the electric motor.
  • the planetary gear has a sun gear, a planet carrier, a set of planetary gears supported on the planet carrier, a first ring gear and a second ring gear.
  • the planet gears have a first meshing with the first ring gear and the sun gear and a second meshing with the second ring gear teeth.
  • a switching ring is axially displaceable in the transmission housing between a first position and a second position, the switching ring engages in the first position in the second ring gear and the switching ring engages in the second position in the planet carrier and wherein the switching ring is rotatably mounted in the transmission housing , A manually operable actuator forces in a first position the switching ring in the first position and forces in a second position the switching ring in the second position.
  • the planetary gear with the switching ring can be built compact.
  • Fig. 1 shows an electric screwdriver 1 as an example of a hand tool.
  • the electric screwdriver 1 has a tool holder 2, in which a rotating tool 3, for example a drill, a screwdriver bit, can be inserted and locked.
  • An electric motor 4 drives the tool holder 2 about a working axis 5 .
  • the electric motor 4 is arranged in a machine housing 6 to which a handle 7 for holding and guiding the electric screwdriver 1 is fastened during operation.
  • the user can take the electric screwdriver 1 by means of a system switch 8 in operation.
  • the electric motor 4 is supplied with power when the user operates the system switch 8 .
  • a Power source may be attached to the machine housing 6 or the handle 7 battery pack 9 or a power connection.
  • a switchable planetary gear 10 is arranged in the drive train between the electric motor 4 and the tool holder 2 .
  • a slider 11 outside the machine housing 6 actuates the planetary gear 10.
  • the slider 11 can be moved by the user into a first switching position or a second switching position.
  • the slide 11 can be moved along the transmission axis 12 or transversely to the transmission axis 12 , wherein in the latter a shift gate converts the circumferential movement into an axial movement.
  • the planetary gear 10 changes its reduction as a function of the switching position of the slider. 11
  • the planetary gear 10 has arranged on a transmission axis 12 , a sun gear 13, a planet carrier 14 with a plurality of planetary gears 15 and a first ring gear 16.
  • the sun gear 13 is preferably arranged on the drive side; the first ring gear 16 is arranged on the output side.
  • the sun gear 13 may for example be coupled directly to the electric motor 4 .
  • On the exemplary first ring gear 16 a gear 17 is arranged, which meshes with another gear.
  • the planet carrier 14 has three shafts 18 or bearings, on each of which a planet gear 15 is rotatably mounted about the axis of the shaft 18 .
  • the number of planet gears 15 is exemplary and is preferably in the range between three and seven planet gears 15th
  • the planetary gears 15 each have two different toothings 19, 20.
  • the first toothing 19 has a larger diameter than the second toothing 20.
  • the number of teeth of the first toothing 19 and the second toothing 20 is preferably the same.
  • the first toothing 19 meshes with the sun gear 13 and the first ring gear 16.
  • a width of the first toothing 19 is preferably equal to a width of the sun gear 13 and the toothing of the first ring gear 16. The width indicates the dimension along the transmission axis 12 .
  • the second toothing 20 may be wider than the first toothing 19 .
  • the second toothing 20 meshes neither with the sun gear 13 nor with the first ring gear 16.
  • a second ring gear 21 is also arranged coaxially on the transmission axis 12 .
  • the second ring gear 21 is freely rotatable relative to the first ring gear 16 .
  • the first ring gear 16 and the second ring gear 21 are disposed adjacent to the transmission axis 12 and at a fixed, fixed distance.
  • the second ring gear 21 meshes permanently with the second gear 20 of the planetary gears 15.
  • the second ring gear 21 is as wide as the second gear 20.
  • An outer diameter of the second ring gear 21 is preferably less than an outer diameter of the first ring gear sixteenth
  • the outer diameter of the second ring gear 16 and an outer diameter of the planetary carrier 14 may advantageously be identical.
  • the second ring gear 21 and the planet carrier 14 are arranged adjacent to the transmission axis 12 adjacent at a fixed, fixed distance.
  • the planetary gear 10 is arranged in a gear housing 22 which is fixed in the machine housing 6 or is formed by the machine housing 6 .
  • the planetary gear 10 has a switching ring 23 which is displaceable along the transmission axis 12 .
  • the switching ring 23 is coupled to the slider 11 such that the switching ring 23 in a first position ( FIGS. 2, 4 and 5 ) comes when the slider 11 is in the first switching position, and in a second position ( FIGS. 6, 7 and 8 ) when the slider 11 is in the second shift position.
  • the connection of the switching ring 23 to the slide 11 can be done via a rigid linkage or via tracking springs.
  • the switching ring 23 is inhibited in the transmission housing 22 against rotation about the transmission axis 12 .
  • the switching ring 23 may have radial projections 24 which engage in axially extending grooves 25 in the transmission housing 22 .
  • the radial projections 24 have an example of a semi-cylindrical cross section, but the cross section may also have a different shape, for example, prismatic, rectangular.
  • the grooves 25 have a correspondingly complementary cross-section to allow a guide along the gear axis 12 and to inhibit rotation about the gear axis 12th Alternatively or additionally, the switching ring 23 axially extending grooves and the gear housing having radial projections which engage analogously in each other.
  • the switching ring 23 overlaps along the transmission axis 12 with the planet carrier 14; in the second position of the switching ring 23 overlaps along the transmission axis 12 with second ring gear 21.
  • the hindered even turning switching ring 23 thus selectively blocks the planet carrier 14 or the second ring gear 21 to rotate about the transmission axis 12.
  • the reduction of the planetary gear 10 changes accordingly ,
  • the exemplary shift ring 23 has radially inwardly projecting claws 26.
  • the second ring gear 21 has recesses 27 complementary to the claws 26, and the planet carrier 14 has recesses 28 complementary to the claws 26 .
  • the switching ring 23 engages according to its position with the claws 26 selectively exclusively in the second ring gear 21 or in the planet carrier 14 a.
  • the shape of the claws 26 and associated recesses 27, 28 are designed such that a sufficient form fit for transmitting a torque from the switching ring 23 to the second ring gear 21 and the planet carrier 14 is formed.
  • the exemplary claws 26 have one semi-cylindrical cross section, the cross section may also be prismatic, rectangular, etc.
  • the switching ring 23 may be provided with recesses into which claws of the second ring gear 21 and claws of the planet carrier 14 engage.
  • the switching ring 23 is disposed between the second ring gear 21 and the planet carrier 14 and engages either with end-face jaws 26 in the second ring gear 21 or in the planet carrier 14 to one of the two elements on turning to prevent the transmission axis 12 .
  • Fig. 9 to Fig.12 show an embodiment of a planetary gear 29.
  • the planetary gear 29 has arranged on a transmission axis 12 , a sun gear 13, a planet carrier 14 with a plurality of planetary gears 15 and a first ring gear 16.
  • the planet carrier 14 has four shafts 18 or bearings, on each of which a planetary gear 15 to the axis of the shaft 18 is rotatably mounted.
  • the planetary gears 15 each have two different toothings 19, 20.
  • the first toothing 19 has a larger diameter than the second toothing 20.
  • the number of teeth of the first toothing 19 and the second toothing 20 is preferably the same.
  • the first toothing 19 meshes with the sun gear 13 and the first ring gear 16.
  • a second ring gear 21 is arranged coaxially on the transmission axis 12 .
  • the second ring gear 21 is freely rotatable relative to the first ring gear 16 .
  • the first ring gear 16 and the second ring gear 21 are arranged adjacent to the transmission axis 12 and at a fixed, fixed distance.
  • the second ring gear 21 meshes permanently with the second toothing 20 of the planet gears 15th
  • the planetary gear 29 has a switching ring 30 which is displaceable along the transmission axis 12 .
  • the switching ring 23 is prevented by engaging in the gear housing 22 cam 31 from rotating.
  • the switching ring 30 is coupled to the slider 11 such that the switching ring 30 comes to a first position when the slider 11 is in the first switching position, and enters a second position when the slider 11 is in the second switching position.
  • the switching ring 23 has a first end toothing 32, which engages in the first position in a front toothing 33 of the second ring gear 21 .
  • the switching ring 23 has a second spur toothing 34 which engages in the second position in a spur toothing 35 of the planet carrier 14 .
  • the switching ring 23 is correspondingly arranged between the second ring gear 21 and the planet carrier 14 or their spur gears 33, 35 .
  • the switching ring 23 inhibits the second ring gear 21 from rotating and releases the planet carrier 14 for rotation; in the second position, the shift ring 23 inhibits the planetary carrier 14 from rotating and releases the second ring gear 21 for rotation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)
EP15186196.0A 2015-09-22 2015-09-22 Machine-outil portative Withdrawn EP3147077A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15186196.0A EP3147077A1 (fr) 2015-09-22 2015-09-22 Machine-outil portative
EP16189706.1A EP3147078B1 (fr) 2015-09-22 2016-09-20 Machine-outil portative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15186196.0A EP3147077A1 (fr) 2015-09-22 2015-09-22 Machine-outil portative

Publications (1)

Publication Number Publication Date
EP3147077A1 true EP3147077A1 (fr) 2017-03-29

Family

ID=54196834

Family Applications (2)

Application Number Title Priority Date Filing Date
EP15186196.0A Withdrawn EP3147077A1 (fr) 2015-09-22 2015-09-22 Machine-outil portative
EP16189706.1A Not-in-force EP3147078B1 (fr) 2015-09-22 2016-09-20 Machine-outil portative

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP16189706.1A Not-in-force EP3147078B1 (fr) 2015-09-22 2016-09-20 Machine-outil portative

Country Status (1)

Country Link
EP (2) EP3147077A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019042908A1 (fr) * 2017-08-29 2019-03-07 Festool Gmbh Machine-outil portative
WO2019042907A1 (fr) * 2017-08-29 2019-03-07 Festool Gmbh Machine-outil portative
DE102018131747A1 (de) 2018-12-11 2020-06-18 Schaeffler Technologies AG & Co. KG Planetengetriebe mit über Planetenräder schaltbaren Planetenstufen

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019220245A1 (de) * 2019-12-19 2021-06-24 Robert Bosch Gmbh Handwerkzeugmaschine mit einem Planetengetriebe
EP4059665A1 (fr) 2020-12-21 2022-09-21 Techtronic Cordless GP Outil électrique doté d'un ensemble engrenage
CN113446364B (zh) * 2021-03-25 2022-03-08 深圳市汇能达塑料有限公司 一种用于台式料理机的行星齿轮箱结构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2338647A2 (fr) * 2009-12-23 2011-06-29 Black & Decker Inc. Outil d'impact hybride doté d'une transmission à deux vitesses
DE202011105040U1 (de) * 2011-04-14 2011-11-17 Top Gearbox Industry Co., Ltd. Getriebemechanismus für ein Elektrowerkzeug
DE202011106465U1 (de) * 2011-07-18 2011-12-20 Top Gearbox Industry Co., Ltd. Mehrganggetriebe für Elektrofahrzeuge
EP2631038A2 (fr) * 2012-02-27 2013-08-28 Black & Decker Inc. Outil à transmission planétaire composé à plusieurs vitesses

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2338647A2 (fr) * 2009-12-23 2011-06-29 Black & Decker Inc. Outil d'impact hybride doté d'une transmission à deux vitesses
DE202011105040U1 (de) * 2011-04-14 2011-11-17 Top Gearbox Industry Co., Ltd. Getriebemechanismus für ein Elektrowerkzeug
DE202011106465U1 (de) * 2011-07-18 2011-12-20 Top Gearbox Industry Co., Ltd. Mehrganggetriebe für Elektrofahrzeuge
EP2631038A2 (fr) * 2012-02-27 2013-08-28 Black & Decker Inc. Outil à transmission planétaire composé à plusieurs vitesses

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019042908A1 (fr) * 2017-08-29 2019-03-07 Festool Gmbh Machine-outil portative
WO2019042907A1 (fr) * 2017-08-29 2019-03-07 Festool Gmbh Machine-outil portative
CN111065490A (zh) * 2017-08-29 2020-04-24 费斯托工具有限责任公司 手持式工具机器
CN111315538A (zh) * 2017-08-29 2020-06-19 费斯托工具有限责任公司 手持式工具机器
US11285595B2 (en) 2017-08-29 2022-03-29 Festool Gmbh Hand-held power tool
US11485004B2 (en) 2017-08-29 2022-11-01 Festool Gmbh Hand-held power tool
CN111315538B (zh) * 2017-08-29 2023-05-02 费斯托工具有限责任公司 手持式工具机器
CN111065490B (zh) * 2017-08-29 2023-11-03 费斯托工具有限责任公司 手持式工具机器
DE102018131747A1 (de) 2018-12-11 2020-06-18 Schaeffler Technologies AG & Co. KG Planetengetriebe mit über Planetenräder schaltbaren Planetenstufen

Also Published As

Publication number Publication date
EP3147078B1 (fr) 2021-02-24
EP3147078A1 (fr) 2017-03-29

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