EP2435210A1 - Machine-outil, notamment machine-outil à main - Google Patents

Machine-outil, notamment machine-outil à main

Info

Publication number
EP2435210A1
EP2435210A1 EP10713967A EP10713967A EP2435210A1 EP 2435210 A1 EP2435210 A1 EP 2435210A1 EP 10713967 A EP10713967 A EP 10713967A EP 10713967 A EP10713967 A EP 10713967A EP 2435210 A1 EP2435210 A1 EP 2435210A1
Authority
EP
European Patent Office
Prior art keywords
housing
machine tool
air guide
tool according
air
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
EP10713967A
Other languages
German (de)
English (en)
Other versions
EP2435210B1 (fr
Inventor
Florian Esenwein
Manfred Lutz
Thomas Schomisch
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 EP2435210A1 publication Critical patent/EP2435210A1/fr
Application granted granted Critical
Publication of EP2435210B1 publication Critical patent/EP2435210B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • 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
    • 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
    • B25F5/02—Construction of casings, bodies or handles

Definitions

  • Machine tool in particular hand tool
  • the invention relates to a machine tool, in particular a
  • Hand tool with a composite of two separate housing parts housing according to the preamble of claim 1.
  • a hand tool machine which has a two-part housing, comprising a motor housing for receiving an electric drive motor and a gear housing for accommodating a gear via which the movement of the armature shaft of the motor is converted into a tool movement.
  • a cooling air flow is generated via a fan wheel, which is guided along the drive motor in the interior of the housing and guided by means of an air guide ring in the desired direction.
  • the air guide ring is arranged in the transition area between the engine and the transmission housing and clamped between these housing parts.
  • the invention is based on the object with simple constructive measures a machine tool, in particular a hand tool, which has an air guide ring in the housing, so that over a long period of operation an exact positioning of the housing parts of the housing to each other or of components in the housing is guaranteed ,
  • the machine tool according to the invention which is preferably a hand tool, in particular an electric hand tool, has a housing composed of at least two separate housing parts and an air guide element, which is arranged in the housing and serves to guide the flow of a guided through the housing cooling air flow.
  • the air guide element is preferably an air guide ring which is arranged between a fan wheel for generating the cooling air flow and the drive motor.
  • the air guide element can also be formed by an air distributor, which is arranged axially opposite to the air guide ring on the fan.
  • the air guide element is designed independently of a connecting device, which serves to connect the housing parts. Furthermore, it is provided that the air guide element is subjected to a force of a housing part axially into a seat in the other housing part, wherein in the transmission path between the first housing part, the air guide element and the second housing part a spring element is arranged.
  • Embodiments of the prior art is no longer part of the connection between the housing parts, so that component tolerances in the air guide or heat or aging-related changes in length has no effect on the relative positioning between the housing parts and thus also arranged in the housing parts components regardless of the air guide their position can maintain over a long service life.
  • an electric drive motor which is arranged in a housing part designed as a motor housing, the motor spindle, the spindle bearings and the collectors can be held in the housing with a higher position accuracy. Tolerances or change in length in the air guide thus affect only on its relative position in the housing, but not on the position of the drive motor.
  • the air guide element is acted upon directly or indirectly by one of the housing parts axially into a seat in the other housing part.
  • this application of force is independent of the attachment of the two housing parts together.
  • the force of a spring element which is arranged in the transmission path between the first housing part, the air guide element and the second housing part, acts on the air guide element.
  • the spring element on the one hand has the task of ensuring a play-free fit of the air guide element by the air guide is pressed by one of the housing parts against the force of the spring element against the seat in the other housing part.
  • the spring element also serves for decoupling the connection between the housing parts from the force loading of the one housing part onto the air guide element. The spring element ensures that fundamentally smaller forces act in this transmission chain than in the direct connection between the housing parts.
  • the spring element is formed integrally with the air guide element.
  • the air guide element is preferably made
  • the spring element may be formed as a resilient support member on the air guide, which rests in the installed position on an inner wall of the housing forming the seat for the air guide.
  • the spring element may be formed as a spiral or leaf spring, which is arranged in the transmission chain between the housing parts and the air guide.
  • a design as a rubber element is possible and generally as a damping element, which in addition to the damping and resilient Features.
  • active compensation elements come into consideration, in which as a function of supplied input variables, a manipulated variable is generated, which acts on the air guide element.
  • the spring element acts, for example, in the radial direction, ie transversely to the longitudinal axis of the motor or of the housing.
  • This embodiment is advantageously combined with the resilient, integrally formed with the air guide element supporting element, which stands out axially relative to the main body of the air guide and at least partially can escape radially when force is applied.
  • an axial displacement of the air guide element is achieved.
  • beveled contact surfaces on the support element and / or inclined inner walls may be provided in the seat of the air element receiving housing part, so that axially deflects the support element due to the oblique surfaces, whereby an axial displacement is accompanied.
  • the compensatory movement of the spring element in the axial and / or radial direction is carried out until an equilibrium of forces prevails in the spring element, in which the application of force by one of the housing parts represents the governing force component.
  • the spring element may act additionally or alternatively to the radial mode of action in the axial direction, for example in the embodiment as a separate spring or as an actuator.
  • the air guide element forms an air guide ring which is arranged axially on one side of a fan wheel, wherein an air distributor is positioned on the axially opposite side of the fan wheel.
  • the air distributor can be used to apply force to the air guide ring by the air distributor is supported on an axial end face on the transmission housing and acts on the opposite axial end face the air guide, which is accommodated in a seat in the motor housing.
  • a support rib on the air guide element, which supports the drive motor.
  • the support rib but serves only to fix the position of the drive motor in the event of heat or old conditional changes in position and does not serve for permanent power transmission. It may be appropriate to provide a narrow air gap between the support rib and the drive motor in the regular installation position.
  • FIG. 1 shows a section through a hand tool in the region of an electric drive motor receiving motor housing which is frontally connected to a transmission housing, wherein in the transition region between the engine and gearbox housing an air guide ring is arranged,
  • Fig. 3 shows a further housing representation with an air guide ring in another
  • FIG. 4 shows a further illustration of a housing with an air guide ring in a further embodiment
  • FIG. 5 is a perspective detail view of an air guide ring
  • Fig. 6 is a perspective detail view of a motor housing with a view of the front side.
  • FIG. 1 a detail of an electric hand tool 1 is shown, which comprises a two-part housing 2, which consists of a motor housing 3 and a separately formed therefrom gear housing 4, wherein the motor housing 3 and the gear housing 4 in the direction of the longitudinal axis of an e-lektrischen Drive motor 5 are arranged one behind the other and connected to each other.
  • the drive motor 5 is accommodated in the motor housing 3 and has a housing-fixed stator 6 and a stator 6 rotating in the armature shaft 7, which is rotatably mounted in the housing-side bearings 8 and 9.
  • housing added, which generates a cooling air flow, which is sucked into the interior of the housing and sweeps along the drive motor 5 axially for cooling.
  • an air guide ring 11 which is arranged axially in front of the fan wheel 10, is provided, which is arranged axially between the fan wheel 10 and the drive motor 5.
  • an air distributor 12 is located on the axially opposite end face of the fan wheel 10.
  • the air guide ring 1 1 is accommodated in a seat 13 in the motor housing 3, wherein the seat 13 is adjacent to the free end face of the motor housing 3.
  • Axially integral with the main body of the air guide ring 1 1 is an axially extending in the direction of the drive motor 5 extending support rib 14 whose free end face is located at a short distance from the stator 6 of the drive motor.
  • the support rib 14 supports the stator 6 in the event of a positional shift of the drive motor 5 within the motor housing 3.
  • the air guide ring 1 1 is subjected to a force of force from the transmission housing 4 or a component arranged on the transmission housing 4 in its seat 13 in the motor housing 3.
  • a spring element located in the transmission path between the gear housing 4, the air guide ring 1 1 and the motor housing 3, a spring element which receives the axial force, which emanates from the gear housing 4 in the installed position.
  • connection between the motor housing 3 and the gear housing 4 is independent of the air guide 1 1 and also independent of the other air-conducting elements, ie the fan 10 and the air distributor 12. In this way it is ensured that the air-conducting elements not the connection force must be transferred to connect the two housing parts 3 and 4.
  • the air distributor 12 is supported axially on a shoulder on the transmission housing 4. At the opposite end face of the air distributor 12 is in contact with the air guide ring 1 first and exerts an axial force on this.
  • the accommodated in the seat 13 in the motor housing 3
  • Gutleitring 1 1 is supported on the air distributor 12 opposite side on a spring element 15 which is accommodated in a pocket which is formed on the inner wall of the motor housing 3.
  • the spring element 15 is designed for example as a rubber ring.
  • Spring element 15 in the motor housing 3 presses, wherein the spring element 15 an axial counterforce builds up, so that the air guide ring 1 1 is in the axial equilibrium of forces.
  • Air guide 1 1 completely disposed within the motor housing 3. In principle, however, it is also possible for the air guide ring 1 1 to protrude axially at least partially beyond the end face of the motor housing 3 and projecting into the transmission housing 4.
  • the air guide 1 1 is subjected to a force of the air manifold 12 axially into its seat 13 in the motor housing 3, wherein the air distributor 12 is supported on the transmission housing 4.
  • a support member 17 is formed, which is formed as axially over the main body of the air guide 1 1 superior support web, the free end face abuts an oblique inner wall 13a of the seat 13 in the motor housing 3.
  • the support member 17 on the air guide 1 1 has a radial spring mobility and is pressed against the inclined inner wall 13a with axial force, wherein the support member 17 due to the slope of réellewan- fertilizes 13a radially inwardly, whereupon the air guide axially so far in his Seat 13 is moved until an axial balance of forces prevails.
  • the air guide ring 1 1 is also subjected to a force of force from the air distributor 12 supported on the gearbox housing 4 in its seat 13 in the motor housing 3.
  • a separate component 15 is provided, which between the axially projecting support rib 17 on the air guide ring 1 1 and the end face of the stator 6 is arranged.
  • the spring element 15 is designed as a rubber element or buffer.
  • Fig. 5 is a detail view of an air guide ring 1 1 is shown, which corresponds to the Lucasleit- ring from the embodiment of FIG. 3. About the scope of
  • Air guide ring distributed a total of four support elements or legs 17 are arranged, which are adjacent to the outer periphery of the main body of the air guide ring and projecting axially beyond the main body.
  • the support elements 17 are formed integrally with the air guide ring and have a radial Federbeweg- sensitivity.
  • the free end face of the support elements 17 is formed as an inclined contact surface 17a, which is adapted to the slope of the inner wall 13a of the seat 13 in the motor housing 2 (FIG. 3).
  • the radial deflection movement of the support elements 17 is supported in an axial displacement in the seat 13 inside.
  • Angle offset from the support elements 17 are also diametrically opposite two positive locking elements 18 integrally formed with the air guide ring 1 1 det. These positive locking elements 18 are in the installed position in the circumferential direction in positive engagement with other positive locking elements 19 which are arranged on the inner wall 13a in the seat 13 on the motor housing 3, as shown in FIG. At the interlocking elements 19 in the motor housing 3 can be arranged to the free end side arrow shapes for a facilitated axial insertion of the air guide into the seat 13.
  • guide parts 20 are also located on the inner wall 13a of the motor housing 3 which are each assigned to a support element 17 on the air guide ring 1 1.
  • the number of guide parts 20 corresponds to the number of support elements 17. In the installation position, the support elements 17 lie between the inner wall 13 a and the guide parts 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Motor Or Generator Frames (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne une machine-outil à main présentant un boîtier composé de deux parties de boîtier séparées et un élément de guidage d'air disposé dans le boîtier, l'élément de guidage d'air est conçu pour relier les parties de boîtier indépendamment d'un dispositif d'assemblage. L'élément de guidage d'air est déplacé, sous l'effet de la force exercée axialement par une partie de boîtier, dans un siège de l'autre partie de boîtier, un élément ressort étant disposé sur le trajet de transmission entre les parties de boîtier et l'élément de guidage d'air.
EP10713967A 2009-05-27 2010-04-16 Machine-outil, notamment machine-outil à main Active EP2435210B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009026519A DE102009026519A1 (de) 2009-05-27 2009-05-27 Werkzeugmaschine, insbesondere Handwerkzeugmaschine
PCT/EP2010/055027 WO2010136261A1 (fr) 2009-05-27 2010-04-16 Machine-outil, notamment machine-outil à main

Publications (2)

Publication Number Publication Date
EP2435210A1 true EP2435210A1 (fr) 2012-04-04
EP2435210B1 EP2435210B1 (fr) 2013-02-20

Family

ID=42315877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10713967A Active EP2435210B1 (fr) 2009-05-27 2010-04-16 Machine-outil, notamment machine-outil à main

Country Status (7)

Country Link
US (1) US9399275B2 (fr)
EP (1) EP2435210B1 (fr)
JP (1) JP5496325B2 (fr)
CN (1) CN102448667B (fr)
DE (1) DE102009026519A1 (fr)
RU (1) RU2011153017A (fr)
WO (1) WO2010136261A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5829947B2 (ja) 2012-02-22 2015-12-09 株式会社マキタ 電動工具
DE102012223897A1 (de) * 2012-12-20 2014-06-26 Robert Bosch Gmbh Handwerkzeugmaschine
GB201413008D0 (en) * 2014-07-23 2014-09-03 Black & Decker Inc A range of power tools
DE102015204231B4 (de) * 2015-03-10 2021-03-18 Robert Bosch Gmbh Werkzeug und Verfahren zum Behandeln eines Werkstücks mit einem Werkzeug
WO2017102126A1 (fr) 2015-12-17 2017-06-22 Robert Bosch Gmbh Machine-outil portative pourvue d'un porte-filtre
DE102015225748A1 (de) 2015-12-17 2017-06-22 Robert Bosch Gmbh Handwerkzeugmaschine mit einem Filterträger
US10759080B2 (en) 2017-01-22 2020-09-01 Nanjing Chervon Industry Co., Ltd. Electric tool
EP3815848A4 (fr) * 2018-06-29 2021-12-01 Koki Holdings Co., Ltd. Outil électrique

Family Cites Families (19)

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NL277215A (fr) * 1961-04-14
DE2910845A1 (de) * 1979-03-20 1980-10-02 Bosch Gmbh Robert Elektrisch angetriebenes handwerkzeug, insbesondere bohrmaschine
DE29501974U1 (de) * 1995-02-08 1996-06-05 Bosch Gmbh Robert Elektrohandwerkzeugmaschine
US6043575A (en) * 1999-03-05 2000-03-28 Snap-On Tools Company Power tool with air deflector for venting motor exhaust air
DE19957369A1 (de) * 1999-11-29 2001-06-13 Scintilla Ag Handwerkzeugmaschine mit einem Akku
DE10242738A1 (de) 2002-09-13 2005-01-20 Robert Bosch Gmbh Handwekzeugmaschine, insbesondere Winkelschleifmaschine
DE10248921A1 (de) * 2002-10-17 2004-05-13 C. & E. Fein Gmbh & Co Kg Elektrowerkzeug
DE10318947A1 (de) * 2003-04-26 2004-11-18 Robert Bosch Gmbh Elektrische Handwerkzeugmaschine mit Akkupack
JP4407158B2 (ja) 2003-05-14 2010-02-03 日立工機株式会社 携帯用電動工具
US6942042B2 (en) * 2003-11-12 2005-09-13 De Poan Pneamatic Corp. Pneumatic motor-controlled valve of screwdriver
DE102004025951A1 (de) * 2004-05-27 2005-12-22 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere Bohr- und/oder Schlaghammer
JP4533016B2 (ja) 2004-06-16 2010-08-25 日立工機株式会社 電動工具及び電動工具用固定子
US7185713B2 (en) * 2005-03-02 2007-03-06 Mi Jy-Land Industrial Co., Ltd. Air-driven screwdriver performs hole drilling, thread tapping and bolt tightening
DE102005038088A1 (de) * 2005-08-11 2007-02-15 Hilti Ag Verbindungsanordnung zwischen Hauptgehäuse und Griffgehäuse
JP4367415B2 (ja) * 2006-01-11 2009-11-18 日立工機株式会社 電動工具
DE102006027774A1 (de) * 2006-06-16 2007-12-20 Robert Bosch Gmbh Handwerkzeugmaschine
DE102007017243A1 (de) 2007-04-12 2008-10-16 Robert Bosch Gmbh Werkzeugmaschine, insbesondere Handwerkzeugmaschine
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Also Published As

Publication number Publication date
US9399275B2 (en) 2016-07-26
RU2011153017A (ru) 2013-07-10
WO2010136261A1 (fr) 2010-12-02
JP2012528013A (ja) 2012-11-12
CN102448667B (zh) 2014-05-28
CN102448667A (zh) 2012-05-09
DE102009026519A1 (de) 2010-12-02
EP2435210B1 (fr) 2013-02-20
US20120138325A1 (en) 2012-06-07
JP5496325B2 (ja) 2014-05-21

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