EP3883728A1 - Machine-outil portative comprenant un dispositif de changement de vitesse - Google Patents

Machine-outil portative comprenant un dispositif de changement de vitesse

Info

Publication number
EP3883728A1
EP3883728A1 EP19802148.7A EP19802148A EP3883728A1 EP 3883728 A1 EP3883728 A1 EP 3883728A1 EP 19802148 A EP19802148 A EP 19802148A EP 3883728 A1 EP3883728 A1 EP 3883728A1
Authority
EP
European Patent Office
Prior art keywords
gear
guide
switching element
housing
hand tool
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.)
Granted
Application number
EP19802148.7A
Other languages
German (de)
English (en)
Other versions
EP3883728B1 (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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3883728A1 publication Critical patent/EP3883728A1/fr
Application granted granted Critical
Publication of EP3883728B1 publication Critical patent/EP3883728B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 handheld power tool with a housing in which a drive motor and a transmission which can be driven by the drive motor are arranged for driving an output shaft, the transmission being arranged in a transmission housing, and a gear changeover device being provided for changing gear of the transmission .
  • a hand tool with a gear change device for changing gear of a machine associated with the hand tool is known.
  • a drive motor and the gear which can be driven by the drive motor are arranged in a housing of the hand-held power tool, the gear furthermore being arranged in an associated gear housing.
  • the gear change device has a large number of individual parts and has a comparatively large space requirement.
  • the present invention provides a handheld power tool with a housing in which a drive motor and a drive which can be driven by the drive motor are arranged for driving an output shaft, the transmission being arranged in a transmission housing, and a gear change device for changing gear of the transmission is provided.
  • the gear change device has a change-over element for gear change, which is mounted, in particular, essentially axially movable relative to the transmission housing, and in particular in the circumferential direction of the gear housing rotatably mounted tes, loading element, with a gear change by rotating the loading element hen in the circumferential direction of the gear housing.
  • the invention thus makes it possible to provide a hand-held power tool in which a simple and uncomplicated gear change can be made possible by the gear change device.
  • the Gangumschaltvor direction has a comparatively small space requirement.
  • the changeover element preferably has at least one guide element, the gear changeover being carried out by means of a displacement of the guide element directed essentially in the axial direction towards the transmission housing. This enables a safe and reliable gear change.
  • the switching element preferably has at least one receptacle at its end facing the actuating element and the actuating element has at least one loading section at its end facing the switching element, the loading section being arranged in at least sections of the receptacle in at least one operating mode. It is thus possible to set the at least one operating mode in a simple manner.
  • the switching element preferably has a guide groove on its inner circumference, at least in sections, and the gear housing has a guide web assigned to the guide groove, wherein when the actuating 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 in the axial direction Direction is shifted.
  • Gear change can thus be implemented simply and uncomplicatedly.
  • the transmission is designed as a planetary transmission, the transmission being assigned a transmission member for axially displacing a switching element assigned to the planetary transmission, and the transmission member being arranged in a receptacle of the switching element and has a guide pin, which is arranged such that it can be guided in a recess in the transmission housing.
  • a gear change can be done safely and reliably by axially shifting the switching element.
  • the guide member forms a guide portion of the transmission member.
  • a suitable transmission member can thus be provided in a simple manner.
  • the switching element preferably has a receiving groove for receiving the guide element. This allows the guide element to be accommodated on the switching element easily and uncomplicatedly.
  • the switching element is preferably formed in one piece with the guide element. A compact switching element can thus be provided.
  • the loading element is fixed in position in the axial direction on the gear housing.
  • the compact and space-saving design of the gear change device can be made possible.
  • the loading element preferably has an operating section. Thus, a user can perform a gear shift in a simple manner.
  • the switching element and the loading element are preferably injection molded parts.
  • the gear shift device can be formed comparatively cheap.
  • the present invention provides a gear change device for a hand machine tool.
  • the invention thus makes it possible to provide a gear change device for a hand power tool, by means of which a simple and uncomplicated gear change can be made possible.
  • the Gangumschaltvor direction has a comparatively small space requirement.
  • FIG. 1 is a side view of an exemplary hand tool with a gear change device according to the invention
  • FIG. 2 is a perspective view of a gearbox assigned to the hand-held power tool and the gear shifting device from FIG. 1 in a first operating mode
  • FIG. 3 is a perspective view of the transmission and the Gangumschaltvor direction of FIG. 2 in a further operating mode
  • Fig. 4 is a perspective view of one of the gear change device of
  • FIG. 5 is a perspective view of one of the gear shifting devices of FIG.
  • FIG. 6 is a perspective view of one of the spring elements of FIG. 5,
  • Fig. 7 is a longitudinal section through the transmission with the Gangumschaltvorrich device in the operating mode of Fig. 3, and
  • FIG. 8 shows a longitudinal section through the transmission with the gear change device in the operating mode of FIG. 3, rotated in the circumferential direction of the transmission in comparison with FIG. 7.
  • Fig. 1 shows an exemplary hand tool 100 with a housing 1 10, in which at least one drive motor 120 for driving a tool holder 150 can be arranged in a tool holder 150, preferably exchangeable tool 152 is arranged.
  • the handheld power tool 100 is preferably assigned control electronics, at least for controlling the drive motor 120.
  • the housing 1 10 has a handle on which a hand switch 112 is arranged.
  • the drive motor 120 is, for example, can be actuated, ie switched on and off, and preferably such that it can be electronically controlled or regulated such that both a reversing operation and specifications can be implemented with regard to a desired rotational speed.
  • the handheld power tool 100 can preferably be connected to a battery pack 140 for the mains-independent power supply, but can alternatively also be operated in a network-dependent manner.
  • Handheld power tool 100 preferably has a switchable transmission 130 that can be switched between at least a first and a second gear stage.
  • the gear 130 is preferably arranged in a gear housing 132.
  • the gear 130 is preferably formed in the manner of a planetary gear.
  • a gear change device 135 is used to set the various operating modes or gear stages.
  • FIG. 2 shows the transmission 130 from FIG. 1 arranged in the transmission housing 132 with the gear shifting device 135, the transmission housing 132 having 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 gear housing 132 or a preferably cylindrical portion 221 associated with the gear housing 132, defines an axial direction 203 and a radial direction 204.
  • the gear shifting device 135 preferably has a shifting element 240, which is movably mounted to the transmission housing 132, for shifting the gear, and a loading element 230.
  • the switching element 240 is preferably mounted such that it can be moved relative to the gear housing 132, in particular essentially axially movable or displaceable relative to the gear housing 132.
  • the loading element 230 is preferably mounted so as to be rotatable, in particular in the circumferential direction of the gear housing 132.
  • the switching element 240 and the loading element 230 are operatively connected to one another.
  • the two elements, or the switching element 240 and the loading element 230 preferably interlock, interlock.
  • the switching element 240 and the actuating element 230 are injection molded parts.
  • a gear change is preferably carried out by rotating the actuating element 230 in the circumferential direction of the gear housing 132.
  • the switch 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 the switching element 240 is additionally rotated comparatively slightly in comparison with 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 preferably 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, the gear change taking place by means of a displacement of the guide element 260, 261 directed essentially in the axial direction towards the gear housing 132.
  • the two guide elements 260, 261 are preferably 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 essentially axially displaceably on the gear housing 132.
  • the switching element 240 preferably has at least one, illustratively two receptacles 245, 246 at its end 248 facing the loading element 230.
  • the Umschaltele element 240 for receiving the guide element 260, 261 preferably has a receiving groove 243, 244.
  • the switching element 240 for receiving each of the at least two guide elements 260, 261 designed as spring elements each has a receiving groove 243, 244.
  • two adjacent receptacles 245, 246 preferably form a section 242.
  • two sections 242 are shown in FIG.
  • 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 bears against a standing edge 223 of the gear housing 132.
  • the first end 232 of the loading element 230 abuts at least one, illustratively on two fixing sections 224 of the gear housing 132.
  • the loading element 230 is fixed in position in the axial direction 203 and can only be rotated or rotated in the circumferential direction or rotatably on the gear housing 132. Furthermore, the loading element 230 has at least one loading section 234 at its end 232 facing the first axial end 201. Before preferably the loading section 234 is madebil det as an axial extension. The loading section 234 is preferably arranged in a receptacle 246 of the switching element 240.
  • the gear change device 135 is in a first gear stage or a first operating mode.
  • the first operating mode is preferably designed as a drilling mode.
  • the application section 234 is preferably arranged at least in sections in the receptacle 246 of the switching element 240.
  • the loading section 234 is arranged at least in sections in the receptacle 246 of the switching element 240, preferably in the first operating mode.
  • the section 234 Beauftschungsab is completely arranged in the receptacle 246, so that the second end 248 of the switching element 240 is present at the second end 232 of the actuating element 230.
  • the transmission 130 preferably has a transmission member 250 for axially displacing a switching element (510 in FIG. 5) associated with the transmission 130.
  • the transmission member 250 preferably has at least one guide pin 251, which is arranged in a recess 225 of the gear housing 130 in a guiding bar.
  • the recess 255 is preferably formed in the axial direction of the gear housing 132.
  • the guide elements 260 designed as the spring elements form 261 a guide section 255 of the transmission member 250 for axially guiding the guide pin 251.
  • the two spring elements 260, 261 are preferably arranged in the receptacle 245 or form the guide section 255 there.
  • a gear change is preferably carried out by rotating the actuating element 230 in the circumferential direction of the transmission housing 132.
  • the actuating 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 configured in any other way, e.g. as a radial extension.
  • a shifting of the switching element 240 with the at least two spring elements 260, 261, which is forced by rotating the loading element 230 in the circumferential direction of the transmission housing 132, preferably takes place essentially in the axial direction 203 of the transmission housing 132.
  • the switching element 240 preferably shifts along one of the transmission housing 132 Guide web 222.
  • the guide web 222 is arranged at a predetermined angle to the axial direction 203 of the gear housing 132 on the gear housing 132. The essentially axial displacement of the switching element 240 can thus be made possible.
  • Fig. 3 shows the gear change device 135 of FIG. 2 in a further gear stage or in a further operating mode.
  • the further or second operating mode is preferably designed as a screw mode.
  • the gear change device 135 is preferably arranged rotated in the circumferential direction of the gear housing 132.
  • a user of the handheld power tool 100 preferably rotates the loading element 230 in the circumferential direction, which in turn rotates the switching element 240 in the circumferential direction with the loading section 234.
  • the loading section 234 acts on the switching element 240 in the receptacle 246.
  • a gap or a gap is preferably formed between the loading section 234 and the receptacle 246.
  • the switching element 240 preferably moves towards the first end 201 by rotation along the guide web 222.
  • the spring elements 260, 261 move the transmission member 250 arranged in the guide section 255 in the axial direction 203 to the first end 201. This takes place a gear change of the transmission 130 or an operating mode switch.
  • a gear change of the transmission 130 or an operating mode switch instead of the preferably two exemplary C-shaped spring elements 260, 261, a rectangular and / or oval element, in particular a spring element, can 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 area of an application 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 has two diametrically opposite receptacles 245 and preferably two diametrically opposite receptacles 246.
  • the switching element 240 preferably has a guide groove 310 on its inner circumference 302, at least in sections.
  • the guide web 222 preferably moves in the guide groove 310.
  • the switching element 240 is essentially displaced in the axial direction 203.
  • the illustratively two opposite guide grooves 310 are preferably formed in the area of the receptacles 245.
  • Fig. 6 shows the spring element 260 of the gear change device 135 of Fig. 2 and Fig. 3.
  • Fig. 6 exemplarily uses the Federele element 260 illustrates the design of the spring elements 260, 261.
  • 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 inwards.
  • the holding sections 403, 404 are for fixing the spring elements 260, 261 to section 242 of the switching element
  • Fig. 7 shows the gear change device 135 of FIG. 3 in the second gear stage or in the second operating mode. 7 illustrates the switching element arranged in the transmission housing 132 and assigned to the transmission 130
  • the switching element 510 For receiving the transmission element 250, the switching element 510 preferably has a receptacle 512.
  • 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 change device 135 from FIG. 7 and illustrates the arrangement of the transmission element 250 in the receptacle 512 of the switching element 510, which is preferably designed as a switching ring gear.
  • the transmission element 250 preferably has a semicircular base body with at least one, illustratively two guide pins 251 .
  • the base body is in the holder
  • FIG. 8 illustrates the arrangement of the guide webs 222 in the guide grooves 310 of the switching element 240.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)
  • Gear-Shifting Mechanisms (AREA)

Abstract

L'invention concerne une machine-outil portative comportant un boîtier, dans lequel sont agencés un moteur d'entraînement (120) et une transmission (130) pouvant être entraînée par le moteur d'entraînement (120) et destinée à 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) destiné au changement de vitesse de la transmission (130) étant prévu. Selon l'invention, le dispositif de changement de vitesse (135) présente un élément de changement (240) monté mobile en particulier sensiblement axialement au boîtier de transmission (132) et destiné au changement de vitesse, ainsi qu'un élément de sollicitation (230) monté mobile en rotation en particulier dans la direction circonférentielle du boîtier de transmission (132), un changement de vitesse étant effectué par rotation de l'élément de sollicitation on (230) dans la direction circonférentielle du boîtier de transmission (132).
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 true EP3883728A1 (fr) 2021-09-29
EP3883728B1 EP3883728B1 (fr) 2024-04-17

Family

ID=68542636

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) CN113165155B (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
CN113165155B (zh) 2024-09-03
EP3883728B1 (fr) 2024-04-17
CN113165155A (zh) 2021-07-23
DE102018220031A1 (de) 2020-05-28
WO2020104227A1 (fr) 2020-05-28

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