WO2011160871A1 - Machine-outil portative - Google Patents

Machine-outil portative Download PDF

Info

Publication number
WO2011160871A1
WO2011160871A1 PCT/EP2011/056632 EP2011056632W WO2011160871A1 WO 2011160871 A1 WO2011160871 A1 WO 2011160871A1 EP 2011056632 W EP2011056632 W EP 2011056632W WO 2011160871 A1 WO2011160871 A1 WO 2011160871A1
Authority
WO
WIPO (PCT)
Prior art keywords
collector
housing
motor housing
air flow
hand tool
Prior art date
Application number
PCT/EP2011/056632
Other languages
German (de)
English (en)
Inventor
Nils Braselmann
Juergen Gairing
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
Priority to RU2013102749/02A priority Critical patent/RU2013102749A/ru
Priority to CN2011800308017A priority patent/CN102947036A/zh
Priority to EP11716271.9A priority patent/EP2585243A1/fr
Publication of WO2011160871A1 publication Critical patent/WO2011160871A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D59/00—Accessories specially designed for sawing machines or sawing devices
    • B23D59/04—Devices for lubricating or cooling straight or strap saw blades
    • 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
    • B25F5/008—Cooling means

Definitions

  • the invention relates to a hand tool such as a jigsaw according to the preamble of claim 1.
  • the drive motor is designed as a DC motor with a built-in motor housing fan.
  • the seated on the rotor shaft of the drive motor fan generates a cooling air flow, which is passed for cooling the drive motor axially through the motor housing and discharged via radial outlet openings again from the motor housing.
  • the transmission of motion from the drive motor to the tool takes place by means of a transmission device, for example a gear, which likewise generates heat during operation of the handheld power tool, which must be dissipated by means of a cooling air flow.
  • a transmission device for example a gear
  • the invention has for its object to dissipate the pending heat during operation efficiently and effectively from a hand tool.
  • the hand tool according to the invention can be used for cutting workpiece machining. It is the hand tool, for example, a jigsaw or the like.
  • the hand tool has as drive to an electric drive motor whose rotor shaft is kinematically coupled via a transmission device with the tool to be driven.
  • the transmission device is, for example, a transmission, wherein in principle also other types of transmission devices such as transmission belts come into consideration, which are used, for example, in manual planing machines.
  • the rotor shaft is the carrier of an anchor package whose coils are energized via a commutator.
  • the commutator comprises a collector on the rotor side, on the lateral surface of which brushes for current transmission abut.
  • a fan wheel is integrated in the drive motor, which is seated on the rotor shaft and is arranged axially adjacent to the collector. About the fan a cooling air flow is generated, which serves to cool the drive motor.
  • the heat of the drive motor is derived from the motor housing via the cooling air flow and, in the further course, from the housing of the handheld power tool.
  • the drive motor is arranged within the housing of the handheld power tool in such a way that the transmission device is coupled to the rotor shaft on the side of the collector.
  • the rotor shaft protrudes on the collector side axially beyond the collector and / or a bearing of the rotor shaft, wherein the protruding portion of the rotor shaft is used for coupling with the transmission device.
  • the rotor shaft is provided, for example, with a pinion or external teeth that mesh with a component of the transmission device.
  • both the fan wheel and the rotor shaft section which serves for coupling to the transmission device, are thus located on the side of the electric drive motor adjacent to the collector, whereas in the prior art the coupling mechanism ment to the transmission device and the fan are arranged on opposite sides of the drive motor.
  • the fan wheel is located axially on the side facing away from the free end face of the collector in the inventive embodiment of the power tool, but in the immediate vicinity of the collector.
  • an air outlet opening is arranged, via which the cooling air flow exits from the motor housing.
  • the air outlet opening in the motor housing is connected to an outflow channel, which leads to an air outlet opening in the housing of the handheld power tool.
  • Another advantage lies in the immediate vicinity of fan and transmission device.
  • air streams within the housing of the power tool can be generated, via which both the drive motor and the transmission can be cooled.
  • the cooling air flow can be passed axially through the motor housing, wherein the entry into the motor housing can be made via one or both axial end faces.
  • a cooling air flow can be guided axially along the outside of the motor housing, that is to say in an area between the motor housing lateral surface and the inner wall of the housing of the handheld power tool.
  • air flows or partial air flows which are additionally also at least partially guided along the transmission device and thus contribute to the cooling of the transmission device.
  • the inflow opening can also be placed at other locations of the housing.
  • the at least one inflow opening is introduced into the housing exclusively in the region of the axial end face of the drive motor, which is remote from the transmission device.
  • the sucked cooling air flows expediently with a first partial air flow axially into the motor housing and traverses the motor housing to the radial outlet via the air outlet opening, which is introduced into the motor housing in the region of the fan wheel.
  • a second partial flow of the cooling air strokes along the outside of the motor housing axially to the opposite end and occurs there axially in the opposite direction in the motor housing until reaching the fan and is also derived via the air outlet opening in the motor housing radially into the outflow.
  • both a cooling of the wall of the motor housing takes place on the inside and on the outside.
  • the guided along the outside partial air flow also reaches the transmission device, which is thus also at least partially cooled by the respective partial air flow.
  • inflow openings are introduced into the housing of the handheld power tool in the region of both axial end faces of the motor housing. Accordingly, fresh air is sucked from the outside via both inlet openings, which is introduced via each of the axially opposite end faces in the interior of the motor housing to the fan, from where the radial discharge takes place via the air outlet opening in the motor housing in the direction of outflow.
  • the fresh air sucked in via the inflow opening, which is adjacent to the transmission device also ensures at least partial cooling of the transmission device in this embodiment.
  • a partial air flow is generated in the embodiment with inlet openings in the region of both axially opposite end faces of the drive motor, which is guided along the outside of the motor housing.
  • the air outlet opening in the motor housing is enclosed by an annular channel, which extends in the circumferential direction at least partially around the motor housing and which is connected to the outflow channel.
  • annular channel which extends in the circumferential direction at least partially around the motor housing and which is connected to the outflow channel.
  • air outlet openings in the motor housing can be connected to the outflow channel via the annular channel.
  • the outflow channel which connects the air outlet opening in the motor housing with the air outlet opening in the housing of the portable power tool, is guided in the direction of the working field of the hand tool.
  • the air flow in the discharge channel is used in this embodiment as blowing air, which is directed to the work area and blown away chips from the work area.
  • the advantage of this embodiment in addition to the free-blown working area, lies in the short path that the heated engine air has to travel between the air outlet opening in the motor housing and the air outlet opening in the housing of the handheld power tool.
  • the embodiment of the hand tool according to the invention results in efficient air cooling of the drive motor and, at least in the embodiment with outflow channel directed onto the working area, a clean working field. Due to the improved efficiency is basically a single fan, which is integrated in the motor housing of the drive motor, sufficient for the generation of the required cooling air flows. As a result, compared with versions with multiple fan wheels, the power consumption decreases, so that a longer service life is given in battery-powered hand tool machines. In addition, the space required in the housing is reduced.
  • FIG. 1 shows in side view a hand tool machine designed as a jigsaw with electromotive drive
  • Fig. 3 shows a variant of the hand tool.
  • the same components are provided with the same reference numerals.
  • an electrically powered power tool 1 which is designed as a jigsaw.
  • the hand tool 1 has in a housing 2 an electrical
  • the rotor shaft 7 of the electric drive motor 3 is coupled to a transmission 4, which via a tool holder 8, a tool - in the embodiment, a saw blade - drives.
  • a base plate 6 which rests on the upper side of the workpiece during workpiece machining.
  • the saw blade 5 is passed through a recess in the base plate 6 and performs a vertical up and down movement during operation.
  • the drive motor 3 has a collector 9, which is covered by the motor housing 10 of the drive motor.
  • the collector 9 connected to the rotor shaft 7 is part of a commutator for energizing the coil of the armature, which rests on the rotor shaft 7, the commutator also encloses brushes fixed to the housing, which rest on the lateral surface of the collector 9 for power transmission.
  • the collector 9 is located in the drive motor 3 on the side facing the gear 4.
  • the rotor shaft 7 is designed to be axially extended and protrudes beyond the motor housing 10, wherein the coupling with the gear 4 takes place at a portion of the protruding part of the rotor shaft 7.
  • Rotor shaft 7 has, for example, a pinion, which meshes with a gear of the transmission 4.
  • an air outlet opening 1 1 is introduced, which is arranged axially in the amount of an integrated air in the drive motor 12.
  • the fan 12 is rotatably connected to the rotor shaft 7 and generates cooling air streams 13a, 13b and 14 for cooling in particular the electric drive motor 3 and at least partially also of the transmission 4.
  • In the motor housing 10 can be distributed over the circumference several air outlet openings 1 1 introduced , over that of the fan wheel
  • the air outlet opening 1 1 and the air outlet openings are enclosed by an annular channel 15 which is connected to a discharge channel 16, which opens on the side facing away from the drive motor 3 via an air outlet 19 in the housing in an area of the working field 1 with the tool 5.
  • first slot-shaped air inflow openings 18 are introduced, via the outside of a first cooling air flow 13a in the housing interior for cooling the drive motor 3 is performed.
  • cooling air is sucked from the outside through the inlet openings 18 during rotation of the fan wheel 12 and passed as a cooling air flow 13a in the interior of the motor housing 10, the axially guided to the air outlet opening 1 1 through the motor housing.
  • a second cooling air flow 13b is guided from the air inflow openings 18 axially along the outside of the motor housing 10 to the front side facing the transmission 4, at which the second cooling air flow 13b is directed axially into the interior of the motor housing 10 until reaching the impeller 12.
  • the first cooling air flow 13a cools the drive motor 3
  • the second cooling air flow 13b first cools the drive motor 3 and then, with the reaching of the
  • Front side also the transmission 4.
  • Both cooling air streams 13a, 13b are discharged via the air outlet opening 1 1 from the motor housing 10 in the annular channel 15 and further into the discharge channel 16 according to the arrows 14.
  • the cooling air flow opens as a blast air flow in the region of the working field 10 and blows chips generated during workpiece machining away from the working area 17.
  • the air outlet opening 19 of the outflow channel 16 in this case forms the mouth opening in the housing 2, which faces the working field 17.
  • the handheld power tool 1 shown in FIG. 3 largely corresponds to that of the first exemplary embodiment according to FIGS. 1 and 2, so that reference is made in this respect to the above description.
  • the handheld power tool according to FIG. 3 has additional, second air inflow openings 20, which are arranged in the housing 2 of the handheld power tool in the area between the gear 4 and the facing one Front side of the motor housing 10 of the drive motor 3 are arranged.
  • a cooling air flow 13c flows into the interior of the motor housing via the second air inflow openings 20 and from there via the facing end side.
  • the first cooling air flow 13a which enters axially via the first air inflow openings 18, joins in the area of the fan impeller 12 second cooling air flow 13 c, which is introduced axially via the second air inlet openings 20.
  • the heated air is discharged in accordance with the air streams 14 radially through the air outlet opening 1 1 in the motor housing 10 and passed through the annular channel 15 and the outflow 16 to the working field 17 of the power tool.
  • the cooling of the drive motor 3 takes place via the cooling air streams 13a and 13b introduced into the motor housing 10. This is basically sufficient for cooling; but optionally also takes place a further cooling via a on the outside of the motor housing 10 axially along the cooling air flow, which is sucked, for example via the first air inlet openings 18 into the housing interior and combined with the second cooling air flow 13c.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

Machine-outil portative (1) comportant un moteur d'entraînement (3) électrique dont l'arbre de rotor (7) comporte un collecteur (9), l'arbre de rotor (7) étant relié à un dispositif de transmission (4) pour transmettre le mouvement du rotor à un outil (5). En outre, une roue de ventilateur est disposée au voisinage du collecteur (9) et intégrée dans le moteur d'entraînement (3) pour générer un flux d'air froid (13,14). L'arbre de rotor (7) et le dispositif de transmission (4) sont accouplés côté collecteur.
PCT/EP2011/056632 2010-06-23 2011-04-27 Machine-outil portative WO2011160871A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
RU2013102749/02A RU2013102749A (ru) 2010-06-23 2011-04-27 Ручная машина
CN2011800308017A CN102947036A (zh) 2010-06-23 2011-04-27 手持式工具机
EP11716271.9A EP2585243A1 (fr) 2010-06-23 2011-04-27 Machine-outil portative

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010030376 DE102010030376A1 (de) 2010-06-23 2010-06-23 Handwerkzeugmaschine
DE102010030376.3 2010-06-23

Publications (1)

Publication Number Publication Date
WO2011160871A1 true WO2011160871A1 (fr) 2011-12-29

Family

ID=44350779

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/056632 WO2011160871A1 (fr) 2010-06-23 2011-04-27 Machine-outil portative

Country Status (5)

Country Link
EP (1) EP2585243A1 (fr)
CN (1) CN102947036A (fr)
DE (1) DE102010030376A1 (fr)
RU (1) RU2013102749A (fr)
WO (1) WO2011160871A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150336232A1 (en) * 2012-10-19 2015-11-26 Husqvarna Ab Outdoor Power Device Internal Cooling System
CN115138895A (zh) * 2022-09-06 2022-10-04 烟台汇金精密机械有限公司 一种切割机

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6127840B2 (ja) * 2013-09-02 2017-05-17 日立工機株式会社 電動工具
JP6557207B2 (ja) * 2016-12-23 2019-08-07 本田技研工業株式会社 バッテリパック
CN108262719A (zh) * 2016-12-30 2018-07-10 苏州宝时得电动工具有限公司 动力工具及其吹尘部件
EP3489481B1 (fr) * 2017-11-23 2020-05-13 Andreas Stihl AG & Co. KG Appareil de travail portatif
DE102018206874A1 (de) * 2018-05-04 2019-11-07 Robert Bosch Gmbh Stichsägengehäuse

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704941A (en) * 1952-04-03 1955-03-29 Black & Decker Mfg Co Power driven reciprocating tool
US2866485A (en) * 1958-03-19 1958-12-30 Anton Nicholas Power tools
US4961016A (en) * 1989-08-09 1990-10-02 General Motors Corporation Dual-face cooling fan for a dynamoelectric machine
EP0794038A2 (fr) * 1996-01-08 1997-09-10 Kress-elektrik GmbH + Co. Elektromotorenfabrik Outil à main avec un arrangement de refroidissement
EP1398864A2 (fr) * 2002-09-10 2004-03-17 Matsushita Electric Works, Ltd. Outil électrique
EP1541293A1 (fr) * 2003-12-11 2005-06-15 HILTI Aktiengesellschaft Outil à main
EP1555092A2 (fr) * 2004-01-08 2005-07-20 Makita Corporation Dispositif de refroidissement d'une machine-outil portable

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005062697A1 (de) * 2005-12-28 2007-07-12 Robert Bosch Gmbh Handgeführtes Elektrowerkzeug
DE102006041398A1 (de) * 2006-09-04 2008-03-13 Robert Bosch Gmbh Handwerkzeugmaschine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704941A (en) * 1952-04-03 1955-03-29 Black & Decker Mfg Co Power driven reciprocating tool
US2866485A (en) * 1958-03-19 1958-12-30 Anton Nicholas Power tools
US4961016A (en) * 1989-08-09 1990-10-02 General Motors Corporation Dual-face cooling fan for a dynamoelectric machine
EP0794038A2 (fr) * 1996-01-08 1997-09-10 Kress-elektrik GmbH + Co. Elektromotorenfabrik Outil à main avec un arrangement de refroidissement
EP1398864A2 (fr) * 2002-09-10 2004-03-17 Matsushita Electric Works, Ltd. Outil électrique
EP1541293A1 (fr) * 2003-12-11 2005-06-15 HILTI Aktiengesellschaft Outil à main
EP1555092A2 (fr) * 2004-01-08 2005-07-20 Makita Corporation Dispositif de refroidissement d'une machine-outil portable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150336232A1 (en) * 2012-10-19 2015-11-26 Husqvarna Ab Outdoor Power Device Internal Cooling System
US10369672B2 (en) 2012-10-19 2019-08-06 Husqvarna Ab Outdoor power device internal cooling system
CN115138895A (zh) * 2022-09-06 2022-10-04 烟台汇金精密机械有限公司 一种切割机

Also Published As

Publication number Publication date
DE102010030376A1 (de) 2011-12-29
EP2585243A1 (fr) 2013-05-01
CN102947036A (zh) 2013-02-27
RU2013102749A (ru) 2014-07-27

Similar Documents

Publication Publication Date Title
WO2011160871A1 (fr) Machine-outil portative
EP2371202B1 (fr) Appareil de travail manuel
DE102014211046A1 (de) System mindestens umfassend einen elektronisch kommutierten Elektromotor einer definierten Baugröße und eine wiederaufladbare Batterie mindestens einer Spannungsklasse
DE212013000108U1 (de) Elektrische Werkzeuge
DE10261572A1 (de) Elektrohandwerkzeugmaschine
EP1968772B1 (fr) Outil electrique manuel
EP1398865A2 (fr) Machine-outil éléctrique avec soufflante
DE102010025982A1 (de) Angetriebenes Werkzeug
EP2754535B1 (fr) Machine-outil manuelle dotée d'un ventilateur
EP3659747A1 (fr) Machine-outil à main pourvue de moteur commuté de manière électronique et d'électronique intégrée
DE102010026555A1 (de) Elektrowerkzeug
EP2279058B1 (fr) Machine-outil avec moteur d'entraînement électrique
DE102010002185A1 (de) Werkzeugmaschine mit aktivem elektrischem Generator zur Stromerzeugung
DE102011083319A1 (de) Werkzeugzusatzgerät
DE102013219450A1 (de) Batteriebetriebener Exzenterschleifer mit einem elektronisch kommutierten Elektromotor
EP1923978A2 (fr) Ponceuse orbitale avec un moteur sans balai
EP2841235A2 (fr) Machine-outil portable dotée d'un dispositif aérateur
DE202019102569U1 (de) Winkelschleifer, Bläser und Elektrowerkzeug
DE102019216853A1 (de) Axialflussmaschine für ein elektrisches Bearbeitungsgerät sowie elektrisches Bearbeitungsgerät mit einer Axialflussmaschine
DE102009055411B4 (de) Handwerkzeugmaschinenvorrichtung mit einer Spanblasvorrichtung
EP2998073B1 (fr) Machine-outil portative fonctionnant sur batterie ayant au moins une partie de carter moteur
EP4052356A1 (fr) Machine à flux axial de dispositif de traitement électrique et dispositif de traitement électrique doté d'une machine à flux axial
WO2021083760A1 (fr) Machine à flux axial destinée à un dispositif de traitement électrique et dispositif de traitement électrique doté d'une machine à flux axial
DE102016205648A1 (de) Handwerkzeugmaschine mit Drehstromanschluss und elektronisch kommutierten Elektromotor
DE102012221750A1 (de) Handwerkzeugmaschine

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201180030801.7

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11716271

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2011716271

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2013102749

Country of ref document: RU

Kind code of ref document: A