EP1541293A1 - Handwerkzeug - Google Patents
Handwerkzeug Download PDFInfo
- Publication number
- EP1541293A1 EP1541293A1 EP04106415A EP04106415A EP1541293A1 EP 1541293 A1 EP1541293 A1 EP 1541293A1 EP 04106415 A EP04106415 A EP 04106415A EP 04106415 A EP04106415 A EP 04106415A EP 1541293 A1 EP1541293 A1 EP 1541293A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fan
- transmission
- hand tool
- bearing plate
- slots
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 238000001816 cooling Methods 0.000 claims description 36
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Images
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
- B25F5/008—Cooling means
Definitions
- Cooling air by means of a fan means through suction in the housing of the hand tool aspirated, by means of a, provided in the housing air flow guide over the Engine and the gearbox to cool them and then through exhaust ports blown out in the housing.
- the fan of the fan means includes either one Cover disc with fan blades formed thereon or the cover plate is fixed Part, as so-called end shield, formed in the housing directly next to the fan.
- Hand tools with a bearing plate have the advantage of a flexible and easy installation on.
- the engine and the transmission are separated from each other in each case a housing part the hand tool installed and tested for their functionality.
- At least one the housing parts is provided with a bearing plate as a mounting part for assembling the two Provide parts to the hand tool.
- This can be a so-called platform idea Implement, in the large number produced different engines with in large Number manufactured, different gears, or other functional elements to assemble to the desired handsets.
- the manufacturing costs for a hand tool are characterized compared to one after a conventional manufacturing process lowered hand tool.
- a fan means with a larger fan or an additional fan means which a separate air flow generated by cooling air for the transmission.
- the disadvantage of these solutions is that the energy requirement for that, respectively the fan means strongly increases, so that a substantial Proportion of engine power is no longer available for the working function of the hand tool stands.
- From DE 196 00 339 C1 discloses a fan means is known, in which on a support plate Both sides fan blades are arranged. From the fan means are made of two axial Directions for cooling air on the one hand on the engine and on the other hand through the transmission through Suction openings at two spaced-apart areas sucked on the housing and blown over the radial circumference through exhaust ports again. adversely
- the known solution is that between the engine and the gearbox no end shield can be arranged and thus the platform idea is not feasible.
- the object of the invention is to provide a hand tool with a fan means, the one adequate cooling of the components arranged in the housing while ensuring a easy assembly of the hand tool allows.
- the fan means on the, the transmission side facing the Fan wheel in addition to a bearing plate, which has a plurality of spaced apart slots and has a passage opening for the passage of the drive shaft.
- the negative pressure ensures an air flow through one of the suction openings on the Housing and the slots in the end shield to the fan wheel, causing the cooling of the gearbox with unheated cooling air.
- the heated cooling air is by means of the fan wheel through the exhaust openings on the housing blown out.
- the fan is preferably designed as a radial fan without cover.
- the gear compartment becomes active and without the arrangement of a second or large fan wheel cooled, so the power requirement for the fan means not much higher than at the well-known hand tools is.
- the configuration of the fan means the handset of the platform idea implemented for the production of the handset become.
- In the passage opening is advantageously for the storage of the drive shaft Bearings, preferably arranged a ball bearing.
- the slots in the bearing plate are concentric with the center of the passage opening extending arranged, wherein advantageously all slots substantially the same Distance from the center of the passage opening.
- the efficiency of as Circular sections formed slots is higher than from slots with just trained Edges, since the formed as a circular ring sections slots a better flow behavior of the air flow.
- the fan wheel facing side of the bearing plate at least partially arranged a fan maze whose radial extent with respect to the center the passage opening is limited by a labyrinth ring.
- the fan labyrinth on the end shield can be with the same type of fan and a same power requirement the fan means a higher flow difference on the two sides of the bearing plate be generated.
- the fan labyrinth prevents emergence of a Underpressure in the area of a possibly arranged bearing, the lubricant of the bearing could look out of this.
- the life of the bearing is determined by the arrangement a fan labyrinth significantly increased.
- the maximum radial distance of the slots in the end shield to the center smaller than the outer radius of the fan wheel. This will ensure that the slots in the axial projection of the fan wheel are, whereby the cooling air flows in the device in the desired Be guided in a manner that does not hinder each other can. In addition, the blowing out of the heated cooling air is ensured by means of the fan wheel.
- the transmission is a belt transmission.
- certain maximum temperatures in the gear compartment must not be exceeded, otherwise the belts will be damaged.
- the wear of the belt is by the inventive Fan means significantly reduced, resulting in a longer belt life and thus results in a longer service life of the entire hand tool.
- first intake openings 11 through which the cooling air flow 12 for cooling the motor 3 the fan element 21 flows in
- second suction openings 13 through which the cooling air flow 14 to Cooling of the transmission 5 the fan element 21 flows in
- third intake ports 15 through which the cooling air flow 16 for cooling the electronics 6 flows to the fan element 21, and blow-out openings 17 are arranged, through which the heated cooling air 18 radially is blown out.
- the fan means 21 comprises a bearing plate 22 and a fan formed as a radial fan 23 with fan blades 24, wherein the fan means 21 between the engine 3 and the Gear 5 is arranged on the drive shaft 4.
- the fan means 21 Due to the size and configuration of the intake openings 11, 13 and 15 and the embodiment the fan means 21, the amount of sucked into the housing 2 cooling air is determined.
- a cooling air flow 12 of about 15 l / s, for cooling the transmission 5, a cooling air flow 14th of about 4 l / s and for cooling the electronics 6, a cooling air flow 16 of about 1 l / s, so that from the fan 23 20 l / s heated cooling air must be blown out. Needed for this the fan means 21 has a power requirement of about 160 W.
- the hammer drill 1 has a belt transmission as a transmission 5, which by the cooling air flow 14 is cooled such that the temperatures do not 70 ° C in the range of the transmission 5 exceed.
- the bearing plate 22 has a plurality of spaced apart slots 26 and a passage opening 27 for the drive shaft 4.
- the end shield 22 is viewed from the engine 3 without and in Fig. 5 with the arranged fan 23 shown.
- the slots formed as circular ring sections 26 are concentric with the center of the passage opening 27 at a radial distance R1 extending arranged.
- a fan maze 28 substantially arranged as a cup-shaped recess whose radial extent with respect to the center the passage opening 27 is bounded by a labyrinth ring 29.
- the minimum radial Distance R1 of the slots 26 to the center of the passage opening 27 is greater than the outer radius A1 of the labyrinth ring 29.
- the maximum radial distance R2 of the slots 26 is smaller than the outer radius A2 of the fan 23rd
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
- Fig. 1
- Eine Seitenansicht auf ein Bohrgerät;
- Fig. 2
- die Seitenansicht gemäss Fig. 1 mit einem Teilaufschnitt des Bohrgerätes;
- Fig. 3
- einen Querschnitt entlang der Linie III-III in Fig. 1, bzw. Fig. 2;
- Fig. 4
- eine Ansicht auf das Lagerschild entlang der Linie IV-IV in Fig. 1, bzw. Fig. 2; und
- Fig. 5
- eine Ansicht auf das Lüftermittel entlang der Linie V-V in Fig. 1, bzw. Fig. 2.
Claims (6)
- Elektrisch betriebenes Handwerkzeug, insbesondere ein Bohrgerät oder einen Bohrhammer (1), mit einem Gehäuse (2), in dem ein Motor (3) mit einer Antriebswelle (4), ein, an der Antriebswelle (4) angeordnetes Lüftermittel (21) und ein, dem Motor (3) nachgeordnetes Getriebe (5) angeordnet sind, wobei das Lüftermittel (21) Kühlluft durch zumindest zwei Ansaugöffnungen (11, 13, 15) in dem Gehäuse (2) ansaugt, wobei diese über Motor (3) und Getriebe (5) geleitet und über wenigstens eine Ausblasöffnung (17) in dem Gehäuse (2) wieder ausgeblasen wird, wobei das Lüftermittel (21) ein Lüfterrad (23) mit Lüfterschaufeln (24) beinhaltet, dadurch gekennzeichnet, dass das Lüftermittel (21) an der, dem Getriebe (5) zugewandten Seite des Lüfterrades (23) zusätzlich ein Lagerschild (22) aufweist, das mehrere, zueinander beabstandete Schlitze (26) und eine Durchführöffnung (27) für die Durchführung der Antriebswelle (4) aufweist.
- Handwerkzeug nach Anspruch 1, dadurch gekennzeichnet, dass die Schlitze (26) im Lagerschild (22) konzentrisch zum Zentrum der Durchführöffnung (27) verlaufend angeordnet sind.
- Handwerkzeug nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass an der, dem Lüfterrad (23) zugewandten Seite des Lagerschildes (22) zumindest bereichsweise ein Lüfterlabyrinth (28) angeordnet ist, dessen radiale Erstreckung bezüglich dem Zentrum der Durchführöffnung (27) durch einen Labyrinthring (29) begrenzt ist.
- Handwerkzeug nach Anspruch 3, dadurch gekennzeichnet, dass der minimale radiale Abstand (R1) der Schlitze (26) im Lagerschild (22) zum Zentrum der Durchführöffnung (27) grösser als der Aussenradius (A1) des Labyrinthringes (29) ist.
- Handwerkzeug nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der maximale radiale Abstand (R2) der Schlitze (26) im Lagerschild (22) zum Zentrum der Durchführöffnung (27) kleiner als der Aussenradius (A2) des Lüfterrades (23) ist.
- Handwerkzeug nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Getriebe (5) ein Riemengetriebe ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2003158027 DE10358027A1 (de) | 2003-12-11 | 2003-12-11 | Handwerkzeug |
| DE10358027 | 2003-12-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1541293A1 true EP1541293A1 (de) | 2005-06-15 |
| EP1541293B1 EP1541293B1 (de) | 2007-05-23 |
Family
ID=34485322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20040106415 Expired - Lifetime EP1541293B1 (de) | 2003-12-11 | 2004-12-09 | Handwerkzeug |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1541293B1 (de) |
| DE (2) | DE10358027A1 (de) |
| ES (1) | ES2286564T3 (de) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007077050A1 (de) * | 2005-12-28 | 2007-07-12 | Robert Bosch Gmbh | Handgeführtes elektrowerkzeug |
| GB2459191A (en) * | 2008-04-18 | 2009-10-21 | Bosch Gmbh Robert | Hand-held power tool with additional air inflow opening |
| CN101559588A (zh) * | 2008-04-18 | 2009-10-21 | 罗伯特·博世有限公司 | 手持式工具机 |
| EP2191940A1 (de) * | 2008-11-28 | 2010-06-02 | AEG Electric Tools GmbH | Elektrowerkzeug |
| WO2011160871A1 (de) * | 2010-06-23 | 2011-12-29 | Robert Bosch Gmbh | Handwerkzeugmaschine |
| WO2013136788A1 (en) * | 2012-03-15 | 2013-09-19 | Hitachi Koki Co., Ltd. | Portable electric cutter with fan to cool motor |
| EP2923802A1 (de) * | 2014-03-25 | 2015-09-30 | HILTI Aktiengesellschaft | Riemenkühlung |
| EP3685945A1 (de) * | 2018-12-19 | 2020-07-29 | C. & E. Fein GmbH | Gehäuse für eine elektrowerkzeugmaschine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2465647A3 (de) | 2010-12-20 | 2013-01-16 | HILTI Aktiengesellschaft | Handwerkzeugmaschine mit Luftführungselement |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB167286A (en) * | 1920-05-04 | 1921-08-04 | Samuel Wylie Mitchell Kollock | Improvements in and relating to electric operated hammers |
| US2155082A (en) * | 1937-03-23 | 1939-04-18 | Black & Decker Mfg Co | Portable electric tool and casing |
| DE3340799A1 (de) * | 1983-11-11 | 1985-05-23 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Elektrowerkzeug |
| DE19600339C1 (de) * | 1996-01-08 | 1996-12-19 | Kress Elektrik Gmbh & Co | Handwerkzeug |
| US5634274A (en) * | 1995-04-14 | 1997-06-03 | Makita Corporation | Ventilating device in power driven tool |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1863074U (de) * | 1962-10-05 | 1962-11-29 | Mey Kg Maschf Mafell | Elektrowerkzeug mit untersetzungsgetriebe. |
| DE2129424A1 (de) * | 1971-06-14 | 1972-12-21 | Reinhard Freund Maschb | Universalmotor mit zum Zwecke eines Spritzwasserschutzes labyrinthartigen OEffnungen fuer die Belueftung |
| DE4342986C2 (de) * | 1993-12-16 | 1998-08-13 | Metabowerke Kg | Motorbetriebenes Handwerkzeug mit Riemenantrieb |
| DE10204037C5 (de) * | 2002-02-01 | 2009-07-23 | Ebm-Papst Landshut Gmbh | Radialgebläse mit Elektromotor |
| GB2385017B (en) * | 2002-02-08 | 2005-06-29 | Black & Decker Inc | Drilling and/or hammering tool |
-
2003
- 2003-12-11 DE DE2003158027 patent/DE10358027A1/de not_active Withdrawn
-
2004
- 2004-12-09 ES ES04106415T patent/ES2286564T3/es not_active Expired - Lifetime
- 2004-12-09 EP EP20040106415 patent/EP1541293B1/de not_active Expired - Lifetime
- 2004-12-09 DE DE200450003870 patent/DE502004003870D1/de not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB167286A (en) * | 1920-05-04 | 1921-08-04 | Samuel Wylie Mitchell Kollock | Improvements in and relating to electric operated hammers |
| US2155082A (en) * | 1937-03-23 | 1939-04-18 | Black & Decker Mfg Co | Portable electric tool and casing |
| DE3340799A1 (de) * | 1983-11-11 | 1985-05-23 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Elektrowerkzeug |
| US5634274A (en) * | 1995-04-14 | 1997-06-03 | Makita Corporation | Ventilating device in power driven tool |
| DE19600339C1 (de) * | 1996-01-08 | 1996-12-19 | Kress Elektrik Gmbh & Co | Handwerkzeug |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007077050A1 (de) * | 2005-12-28 | 2007-07-12 | Robert Bosch Gmbh | Handgeführtes elektrowerkzeug |
| RU2510327C2 (ru) * | 2008-04-18 | 2014-03-27 | Роберт Бош Гмбх | Ручная машина |
| GB2459191A (en) * | 2008-04-18 | 2009-10-21 | Bosch Gmbh Robert | Hand-held power tool with additional air inflow opening |
| CN101559588A (zh) * | 2008-04-18 | 2009-10-21 | 罗伯特·博世有限公司 | 手持式工具机 |
| GB2459191B (en) * | 2008-04-18 | 2012-05-30 | Bosch Gmbh Robert | Hand-held power tool |
| EP2191940A1 (de) * | 2008-11-28 | 2010-06-02 | AEG Electric Tools GmbH | Elektrowerkzeug |
| US8479840B2 (en) | 2008-11-28 | 2013-07-09 | Aeg Electric Tools Gmbh | Electric tool |
| WO2011160871A1 (de) * | 2010-06-23 | 2011-12-29 | Robert Bosch Gmbh | Handwerkzeugmaschine |
| CN102947036A (zh) * | 2010-06-23 | 2013-02-27 | 罗伯特·博世有限公司 | 手持式工具机 |
| WO2013136788A1 (en) * | 2012-03-15 | 2013-09-19 | Hitachi Koki Co., Ltd. | Portable electric cutter with fan to cool motor |
| US9808872B2 (en) | 2012-03-15 | 2017-11-07 | Hitachi Koki Co., Ltd. | Portable electric cutter |
| US10201865B2 (en) | 2012-03-15 | 2019-02-12 | Koki Holdings Co., Ltd. | Portable electric cutter |
| EP2923802A1 (de) * | 2014-03-25 | 2015-09-30 | HILTI Aktiengesellschaft | Riemenkühlung |
| WO2015144664A1 (de) * | 2014-03-25 | 2015-10-01 | Hilti Aktiengesellschaft | Riemenkühlung |
| EP3685945A1 (de) * | 2018-12-19 | 2020-07-29 | C. & E. Fein GmbH | Gehäuse für eine elektrowerkzeugmaschine |
| US11465266B2 (en) | 2018-12-19 | 2022-10-11 | C. & E. Fein Gmbh | Housing for an electric machine tool |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1541293B1 (de) | 2007-05-23 |
| ES2286564T3 (es) | 2007-12-01 |
| DE502004003870D1 (de) | 2007-07-05 |
| DE10358027A1 (de) | 2005-07-21 |
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