EP3883728B1 - Machine-outil portative comprenant un dispositif de changement de vitesse - Google Patents

Machine-outil portative comprenant un dispositif de changement de vitesse Download PDF

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Publication number
EP3883728B1
EP3883728B1 EP19802148.7A EP19802148A EP3883728B1 EP 3883728 B1 EP3883728 B1 EP 3883728B1 EP 19802148 A EP19802148 A EP 19802148A EP 3883728 B1 EP3883728 B1 EP 3883728B1
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EP
European Patent Office
Prior art keywords
transmission
power tool
guide
hand
gear
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
EP19802148.7A
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German (de)
English (en)
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EP3883728A1 (fr
Inventor
Andras VIGH
Janos SOLTESZ
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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Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3883728A1 publication Critical patent/EP3883728A1/fr
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Publication of EP3883728B1 publication Critical patent/EP3883728B1/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

Definitions

  • the present invention relates to a hand-held power tool, according to the preamble of patent claim 1, with a housing in which a drive motor and a gear driveable by the drive motor are arranged for driving an output shaft, wherein the gear is arranged in a gear housing, and wherein a gear switching device is provided for changing gears of the gear.
  • Such a hand-held power tool with a gear-changing device for changing gears of a transmission associated with the hand-held power tool is known from the prior art.
  • a drive motor and the transmission driven by the drive motor are arranged in a housing of the hand-held power tool, with the transmission also being arranged in an associated transmission housing.
  • the gear-changing device has a large number of individual parts and requires a comparatively large amount of installation space.
  • a hand-held power tool according to the preamble of patent claim 1 is known, for example, from EN 10 2015 226089 A1 out.
  • the present invention provides a hand-held power tool according to claim 1, with a housing in which a drive motor and a gear driveable by the drive motor are arranged for driving an output shaft, wherein the gear is arranged in a gear housing, and wherein a gear change device is provided for changing gears of the gear.
  • the gear change device has a switching element for changing gears, in particular mounted so as to be movable essentially axially to the gear housing, and a, in particular, an application element which is mounted so as to be rotatable in the circumferential direction of the transmission housing, wherein a gear change takes place by rotating the application element in the circumferential direction of the transmission housing.
  • the invention thus makes it possible to provide a hand-held power tool in which the gear-changing device enables simple and uncomplicated gear switching.
  • the gear-changing device requires a comparatively small amount of installation space.
  • the switching element has at least one guide element, wherein the gear change takes place by means of a displacement of the guide element, essentially in the axial direction towards the transmission housing. This enables a safe and reliable gear change.
  • the switching element has at least one receptacle at its end facing the loading element and the loading element has at least one loading section at its end facing the switching element, wherein the loading section is arranged at least partially in the receptacle in at least one operating mode.
  • the switching element preferably has a guide groove on its inner circumference at least in sections and the gear housing has a guide web associated with the guide groove, wherein when the loading element is rotated in the circumferential direction of the gear housing, the guide web is moved in the guide groove so that the switching element is essentially displaced in the axial direction. In this way, gear switching can be implemented simply and easily.
  • the transmission is designed as a planetary transmission, wherein the transmission is assigned a transmission member for axially displacing a switching element assigned to the planetary transmission, and wherein the transmission member is arranged in a receptacle of the switching element and has a guide pin that is arranged in a recess in the gearbox housing.
  • the guide element forms a guide section of the transmission member.
  • a suitable transmission member can be provided in a simple manner.
  • the switching element preferably has a receiving groove for receiving the guide element. This makes it easy and uncomplicated to accommodate the guide element on the switching element.
  • the switching element is formed integrally with the guide element. This makes it possible to provide a compact switching element.
  • the loading element is fixed in position on the transmission housing in the axial direction. This enables the gear change device to be designed in a compact and space-saving manner.
  • the loading element preferably has an operating section. This allows a user to change gears in a simple manner.
  • the switching element and the loading element are preferably injection-molded parts. This means that the gear switching device can be designed comparatively inexpensively.
  • the gear shifting device enables simple and uncomplicated gear shifting.
  • the gear shifting device requires a comparatively small amount of installation space.
  • Fig.1 shows an exemplary hand-held power tool 100 with a housing 110 in which at least one drive motor 120 is arranged for driving a preferably exchangeable insert tool 152 that can be arranged in a tool holder 150.
  • the hand-held power tool 100 is assigned control electronics at least for controlling the drive motor 120.
  • the housing 110 has a handle on which a hand switch 112 is arranged.
  • the drive motor 120 is, for example, 112 can be actuated, ie switched on and off, and preferably controlled or regulated electronically in such a way that both reversing operation and specifications with regard to a desired rotational speed can be implemented.
  • the hand-held power tool 100 can preferably be connected to a battery pack 140 for mains-independent power supply, but can alternatively also be operated mains-dependent.
  • the handheld power tool 100 has a switchable transmission 130 that can be switched between at least a first and a second gear.
  • the transmission 130 is preferably arranged in a transmission housing 132.
  • the transmission 130 is preferably designed in the manner of a planetary gear.
  • a gear switching device 135 is used to set the various operating modes or gears.
  • Fig.2 shows the gearbox 130 arranged in the gearbox housing 132 of Fig.1 with the gear change device 135, wherein the transmission housing 132 has a first, illustratively left end 201 and an opposite second, illustratively right end 202.
  • An output shaft 210 of the drive motor 120 is arranged at the first end 201.
  • the transmission housing 132 or a preferably cylindrical section 221 associated with the transmission housing 132, defines an axial direction 203 and a radial direction 204.
  • the gear change device 135 has a switching element 240 for gear change, which is mounted so that it can move relative to the transmission housing 132, and an application element 230.
  • the switching element 240 is mounted so that it can move relative to the transmission housing 132, in particular so that it can move essentially axially or be displaced relative to the transmission housing 132.
  • the application element 230 is mounted so that it can rotate in the circumferential direction of the transmission housing 132.
  • the switching element 240 and the application element 230 are operatively connected to one another.
  • the two elements, or the switching element 240 and the application element 230 engage with one another, preferably in a form-fitting manner.
  • the switching element 240 and the application element 230 are injection-molded parts.
  • a gear change is carried out by rotating the loading element 230 in the circumferential direction of the transmission housing 132.
  • the switching element 240 preferably moves essentially axially. It is pointed out that in the context of the invention, an essentially axial movement of the switching element 240 is understood to mean an axial displacement of the switching element 240, in which a comparatively slight rotation of the switching element 240 also occurs compared to the axial displacement. The switching element 240 thus at least partially performs a movement in the manner of a screw rotation.
  • the switching element 240 has a cylindrical base body 241 with an end 247 facing the first end 201 and an end 248 facing the second end 202. Furthermore, the switching element 240 preferably has at least one, preferably two guide elements 260, 261, wherein the gear change takes place by means of a displacement of the guide element 260, 261 directed essentially in the axial direction towards the transmission housing 132.
  • the two guide elements 260, 261 are designed as spring elements.
  • the guide elements 260, 261 are arranged on the switching element 240.
  • the switching element 240 with the at least two spring elements 260, 261 is mounted on the gear housing 132 in a substantially axially displaceable manner.
  • the switching element 240 preferably has at least one, illustratively two receptacles 245, 246 on its end 248 facing the loading element 230.
  • the switching element 240 has a receiving groove 243, 244 for receiving the guide element 260, 261.
  • the switching element 240 has a receiving groove 243, 244 for receiving each of the at least two guide elements 260, 261 designed as spring elements.
  • two adjacent receptacles 245, 246 form a section 242.
  • Fig.2 two sections 242 are shown, each of the sections 242 having a receiving groove 243, 244.
  • the guide elements 260, 261 designed as spring elements can also be arranged on the switching element 240 via a fixed or detachable connection, e.g. an adhesive or screw connection.
  • the loading element 230 preferably has a cylindrical base body 231 with an axial end 232 facing the first end 201 and an axial end 233 facing the second end 202.
  • the second axial end 233 preferably rests on a contact edge 223 of the gear housing 132.
  • the first end 232 of the loading element 230 preferably rests on at least one, illustratively two, fixing sections 224 of the gear housing 132.
  • the loading element 230 is mounted or fixed to the gear housing 132 in a fixed position in the axial direction 203 and can only be rotated or rotated in the circumferential direction.
  • the loading element 230 has at least one loading section 234 on its end 232 facing the first axial end 201.
  • the loading section 234 is preferably designed as an axial extension.
  • the loading section 234 is preferably arranged in a receptacle 246 of the switching element 240.
  • the gear switching device 135 is in a first gear or a first operating mode.
  • the first operating mode is designed as a drilling mode.
  • the loading section 234 is arranged in an operating mode at least in sections in the receptacle 246 of the switching element 240.
  • the loading section 234 is arranged in the first operating mode at least in sections in the receptacle 246 of the switching element 240.
  • the loading section 234 is completely arranged in the receptacle 246, so that the second end 248 of the switching element 240 rests against the second end 232 of the loading element 230.
  • the transmission 130 has a transmission member 250 for axially displacing a switching element (510 in Fig.5 ).
  • the transmission member 250 preferably has at least one guide pin 251 which is arranged in a guideable manner in a recess 225 of the gear housing 130.
  • the recess 255 is preferably formed in the axial direction of the gear housing 132.
  • the guide elements 260, 261, which are designed as the spring elements form the guide section 255.
  • 261 forms a guide section 255 of the transmission member 250 for axially guiding the guide pin 251.
  • the two spring elements 260, 261 are arranged in the receptacle 245 or form the guide section 255 there.
  • a gear change is preferably carried out by rotating the loading element 230 in the circumferential direction of the transmission housing 132.
  • the loading element 230 preferably has an operating section 235.
  • the operating section 235 is designed as an axial extension in the direction of the second end 202.
  • the operating section 235 can also be designed in any other way, e.g. as a radial extension.
  • a displacement of the switching element 240 with the at least two spring elements 260, 261, forced by a rotation of the loading element 230 in the circumferential direction of the gear housing 132 preferably takes place essentially in the axial direction 203 of the gear housing 132.
  • the switching element 240 is preferably displaced along a guide web 222 assigned to the gear housing 132.
  • the guide web 222 is arranged on the gear housing 132 at a predetermined angle to the axial direction 203 of the gear housing 132. In this way, the essentially axial displacement of the switching element 240 can be made possible.
  • Fig.3 shows the gear shift device 135 of Fig.2 in a further gear or in a further operating mode.
  • the further or second operating mode is preferably designed as a screw mode.
  • the gear switching device 135 is preferably arranged rotated in the circumferential direction of the gear housing 132.
  • a user of the hand-held power tool 100 preferably rotates the application element 230 in the circumferential direction, which in turn rotates the switching element 240 in the circumferential direction with the application section 234.
  • the application section 234 preferably applies pressure to the switching element 240 in the receptacle 246.
  • a gap or a gap is preferably formed between the application section 234 and the receptacle 246.
  • the switching element 240 preferably moves by rotation along the guide web 222 towards the first end 201.
  • the spring elements 260, 261 thereby displace the transmission member 250 arranged in the guide section 255 in the axial direction 203 towards the first end 201. This results in a gear change of the transmission 130 or an operating mode change.
  • a rectangular and/or oval element in particular a spring element, can also form the guide section 255.
  • the switching element 240 is formed in one piece with the at least one guide element 260, 261.
  • Fig.4 shows the loading element 230 with its cylindrical base body 231.
  • the loading element 230 preferably has two diametrically opposed loading sections 234, which are preferably arranged at the first axial end 232 of the cylindrical base body 231.
  • the operating section 235 is arranged in the region of an loading section 234.
  • Fig.5 shows the switching element 240 with the guide elements 260, 261 designed as spring elements.
  • four spring elements are arranged on the switching element 240 in the receiving grooves 243, 244.
  • Two spring elements 260, 261 are arranged diametrically opposite each other.
  • the switching element 240 preferably has two diametrically opposite receptacles 245 and preferably two diametrically opposite receptacles 246.
  • the switching element 240 preferably has a guide groove 310 at least in sections on its inner circumference 302.
  • the guide web 222 preferably moves in the guide groove 310.
  • the switching element 240 is thereby displaced essentially in the axial direction 203.
  • the illustrative two opposite guide grooves 310 are preferably formed in the region of the receptacles 245.
  • Fig.6 shows the spring element 260 of the gear shift device 135 of Fig.2 and Fig.3 .
  • the design of the spring elements 260, 261 is shown by way of example using the spring element 260.
  • the spring element 260 preferably has a C-shaped base body 402.
  • a holding section 403, 404 is formed at each end of the C-shaped base body 402.
  • the holding sections 403, 404 are preferably arranged at least approximately radially inwardly.
  • the holding sections 403, 404 are designed to fix the spring elements 260, 261 to the section 242 of the switching element 240.
  • Fig.7 shows the gear shift device 135 of Fig.3 in the second gear or in the second operating mode.
  • the switching element 510 arranged in the transmission housing 132 and associated with the transmission 130.
  • the switching element 510 preferably has a receptacle 512 for receiving the transmission member 250.
  • the receptacle 512 is preferably designed as an annular groove.
  • the switching element 510 is designed as a switching ring gear.
  • Fig.8 shows the gear shift device 135 of Fig.7 and illustrates the arrangement of the transmission member 250 in the receptacle 512 of the switching element 510, which is preferably designed as a switching ring gear.
  • the transmission member 250 preferably has a semicircular base body with at least one, illustratively two guide pins 251.
  • the base body is arranged in the receptacle 512 and the preferably two guide pins 251 penetrate the gear housing 132 for arrangement in the guide section 255 through the recess 225.
  • the transmission member 250 is arranged in the receptacle 512 of the switching ring gear 510 and the guide pins 251 are arranged in a guideable manner in the recess 225 of the gear housing 130.
  • Fig.8 the arrangement of the guide webs 222 in the guide grooves 310 of the switching element 240.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Claims (13)

  1. Machine-outil portative (100) avec un boîtier (110) dans lequel sont agencés un moteur d'entraînement (120) et une transmission (130) pouvant être entraînée par le moteur d'entraînement (120) pour entraîner un arbre de sortie (210), la transmission (130) étant agencée dans un boîtier de transmission (132), et un dispositif de changement de vitesse (135) étant prévu pour le changement de vitesse de la transmission (130), le dispositif de changement de vitesse (135) présentant un élément de changement (240) pour le changement de vitesse, notamment monté de manière à pouvoir se déplacer essentiellement axialement par rapport au boîtier de transmission (132), ainsi qu'un élément de sollicitation (230) notamment monté de manière à pouvoir tourner dans la direction périphérique du boîtier de transmission (132), un changement de vitesse étant effectué par une rotation de l'élément de sollicitation (230) dans la direction périphérique du boîtier de transmission (132), caractérisée en ce que en ce que l'élément de changement (240) présente un corps de base cylindrique (241) qui est agencé dans la direction périphérique autour du boîtier de transmission (132), notamment d'une section cylindrique (221) du boîtier de transmission (132), et l'élément de changement (240) et l'élément de sollicitation (230) s'engagent l'un dans l'autre, notamment par complémentarité de formes.
  2. Machine-outil portative selon la revendication 1, caractérisée en ce que l'élément de changement(240) présente au moins un élément de guidage (260, 261), le changement de vitesse étant effectué au moyen d'un déplacement de l'élément de guidage (260, 261), dirigé essentiellement dans la direction axiale du boîtier de transmission (132).
  3. Machine-outil portative selon la revendication 1 ou 2, caractérisée en ce que l'élément de changement (240) présente au moins un logement (246) à son extrémité (248) tournée vers l'élément de sollicitation (230) et l'élément de sollicitation (230) présente au moins une section de sollicitation (234) à son extrémité (232) tournée vers l'élément de changement (240), la section de sollicitation (234) étant agencée au moins par sections dans le logement (246) dans au moins un mode de fonctionnement.
  4. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de changement (240) présente au moins par sections une rainure de guidage (310) sur sa périphérie intérieure (302) et le boîtier de transmission (132) présente une nervure de guidage (222) associée à la rainure de guidage (310) ; lors de la rotation de l'élément de sollicitation (230) dans la direction périphérique du boîtier de transmission (132), la nervure de guidage (222) étant déplacée dans la rainure de guidage (310), de telle sorte que l'élément de changement (240) est déplacé essentiellement dans la direction axiale (203).
  5. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que la transmission (130) est réalisée sous forme d'engrenage planétaire, un organe de transfert (250) étant associé à la transmission (130) pour le déplacement axial d'un élément de commutation (510) associé à l'engrenage planétaire, et l'organe de transfert (250) étant agencé dans un logement (512) de l'élément de commutation (510) et présentant une broche de guidage (251) qui est agencée de manière à pouvoir être guidée dans un évidement (225) du boîtier de transmission (132).
  6. Machine-outil portative selon la revendication 5, caractérisée en ce que l'élément de guidage (260, 261) réalise une section de guidage (255) de l'élément de transfert (250) pour guider axialement la broche de guidage (251).
  7. Machine-outil portative selon la revendication 6, caractérisés en ce que l'élément de changement (240) présente une rainure de réception (243, 244) pour recevoir l'élément de guidage (260, 261).
  8. Machine-outil portative selon la revendication 6, caractérisée en ce que l'élément de changement (240) est réalisé d'un seul tenant avec l'élément de guidage.
  9. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de sollicitation (230) est fixé en position sur le boîtier de transmission (132) dans la direction axiale (203) .
  10. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de sollicitation (230) présente une section de commande (235).
  11. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de changement (240) et l'élément de sollicitation (230) sont des pièces moulées par injection.
  12. Machine-outil portative selon l'une quelconque des revendications 2 à 11, caractérisée en ce que l'élément de guidage (260, 261) est réalisé sous la forme d'au moins un élément à ressort.
  13. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de sollicitation (230) présente un corps de base cylindrique (231).
EP19802148.7A 2018-11-22 2019-11-11 Machine-outil portative comprenant un dispositif de changement de vitesse Active EP3883728B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018220031.9A DE102018220031A1 (de) 2018-11-22 2018-11-22 Handwerkzeugmaschine mit einer Gangumschaltvorrichtung
PCT/EP2019/080812 WO2020104227A1 (fr) 2018-11-22 2019-11-11 Machine-outil portative comprenant un dispositif de changement de vitesse

Publications (2)

Publication Number Publication Date
EP3883728A1 EP3883728A1 (fr) 2021-09-29
EP3883728B1 true EP3883728B1 (fr) 2024-04-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19802148.7A Active EP3883728B1 (fr) 2018-11-22 2019-11-11 Machine-outil portative comprenant un dispositif de changement de vitesse

Country Status (4)

Country Link
EP (1) EP3883728B1 (fr)
CN (1) CN113165155A (fr)
DE (1) DE102018220031A1 (fr)
WO (1) WO2020104227A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10156392B4 (de) * 2001-11-16 2008-04-10 Robert Bosch Gmbh Gangschaltvorrichtung für ein mehrstufiges Getriebe eines Elektrowerkzeugs
DE102004058175B4 (de) * 2004-12-02 2019-10-31 Robert Bosch Gmbh Handwerkzeugmaschine mit anatomisch verbessertem Schaltelement
US7762349B2 (en) * 2007-11-21 2010-07-27 Black & Decker Inc. Multi-speed drill and transmission with low gear only clutch
DE102008044273B4 (de) * 2008-12-02 2019-10-02 Robert Bosch Gmbh Handwerkzeugmaschine mit einem schaltbaren Getriebe
DE102010000795A1 (de) * 2010-01-12 2011-07-14 Robert Bosch GmbH, 70469 Handgeführtes Elektrowerkzeug mit einem Planetengetriebe
CN105772799B (zh) * 2014-12-23 2017-12-29 苏州宝时得电动工具有限公司 枪钻及其模式切换机构
CN106312957B (zh) * 2015-07-06 2018-12-28 浙江格致工具有限公司 动力工具
DE102015226091A1 (de) * 2015-12-18 2017-06-22 Robert Bosch Gmbh Handwerkzeugmaschine mit einem Schlagwerk
DE102015226089A1 (de) * 2015-12-18 2017-06-22 Robert Bosch Gmbh Handwerkzeugmaschine mit einer Gangumschalteeinheit

Also Published As

Publication number Publication date
EP3883728A1 (fr) 2021-09-29
CN113165155A (zh) 2021-07-23
DE102018220031A1 (de) 2020-05-28
WO2020104227A1 (fr) 2020-05-28

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