WO2004098000A1 - Elektrohandwerkzeugmaschine mit elektromotorischem antrieb - Google Patents
Elektrohandwerkzeugmaschine mit elektromotorischem antrieb Download PDFInfo
- Publication number
- WO2004098000A1 WO2004098000A1 PCT/DE2004/000890 DE2004000890W WO2004098000A1 WO 2004098000 A1 WO2004098000 A1 WO 2004098000A1 DE 2004000890 W DE2004000890 W DE 2004000890W WO 2004098000 A1 WO2004098000 A1 WO 2004098000A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hand tool
- recess
- tool according
- lamella
- commutator
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/006—Structural associations of commutators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/28—Cooling of commutators, slip-rings or brushes e.g. by ventilating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/04—Commutators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/46—Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing
- H01R39/54—Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing by use of impedance between brushes or segments
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/06—Manufacture of commutators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/10—Arrangements of brushes or commutators specially adapted for improving commutation
- H02K13/105—Spark suppressors associated with the commutator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
- H02K7/145—Hand-held machine tool
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
Definitions
- the invention is based on an electric hand machine tool according to the preamble of claim 1.
- a commutator for a universal motor is known, as is also provided for electrical hand tools. Its slats have the outer contour of a flat rectangle, the short sides of which have U-shaped openings, into which a ring anchor that bundles the slats in a ring-like manner can be inserted.
- the lamellae are shaped like bars and, at the operating speed of the electric motor carrying the commutator of about 30,000 rpm, are subject to relatively strong forces which cause the individual lamellae to bend outwards, which means that the commutator does not have a flat cylindrical on its outer side facing the carbon brushes Contour, but tends to have an arcuate convex contour.
- the present invention with the features of claim 1, on the other hand, has the advantage that the commutator does not deform noticeably even at maximum speeds and consequently ensures low-arcing contact with the carbon brushes.
- the wear of both the carbon brushes and the commutator is low and the service life of the corresponding electric motor is extended. Its efficiency is improved because more electrical output is converted into work output and less into heat.
- the interference in the radio and radio wave range is lower and the interference suppression of the electric hand tool is simplified or can be saved.
- the commutator lamella Due to the fact that the commutator lamella has at least one central recess, it forms a dimensionally stable bar profile which, due to the high radial acceleration, opposes deformation forces directed transversely to the longitudinal axis and a high resistance to deformation or bending, which due to mass reduction is exposed to lower deformation forces than previously known commutator lamellae ,
- annular channel is formed through the lamella bundle bundled in a ring shape to the commutator, through which cooling air can be guided or another ring anchor can grip which prestresses the lamellae radially inwards in the center, so that they can only be slightly deformed radially outwards at high speed.
- the material structure of the lamella is strengthened and the stiffness is improved as a result of the profile formation.
- the recess is designed as a window-like opening that completely penetrates the lamella, a circumferential, mass-reduced ring channel is formed in the commutator, which, compared to previous solutions, enables a better distribution of the adhesive or the molding compound to hold the commutator together.
- the corresponding lamella forms a particularly dimensionally stable profile. Because the lamella has additional, open transverse recesses at both ends, the end areas of the lamellae can tend to deform more radially outwards than solid lamellae. This counteracts a curvature of the central area of the lamella outwards, so that it remains flat in the area of contact of the carbon brush.
- the end regions have a cross-section that increases from the outside inward and thus increases the bending stiffness, so that their centrifugal force-induced radial deformation to the outside is reduced.
- the molding compound or the adhesive can be better distributed in the region of the cavities.
- the lamellae in the ring assembly form a particularly stable structure that is safe against deformation.
- the cooling of the motor in the commutator area is improved by the fact that the fins are provided with fan blades at their outer ends serving as contact lugs.
- FIG. 1 shows a longitudinal section of a handheld power tool with a universal motor
- FIG. 2 shows the spatial longitudinal section of a commutator
- FIG. 3 shows a cross section of a collector according to the invention
- FIG. 4 shows a further longitudinal section of a collector according to the invention
- FIG. 5 shows a single lamella of the commutator.
- Figure 6 shows another variant of a single slat
- Figure 1 shows a longitudinal section of a handheld power tool 10 designed as an eccentric grinder, the stepped cylindrical housing 12 of which has a vertical longitudinal axis 13, from which a main handle 14 extends substantially perpendicularly radially outwards and in the opposite direction, i.e. forward an additional handle 18 extends.
- a button 16 of a switch not designated in detail, for switching the handheld power tool drive 10 on and off.
- An electric motor 20 is arranged centrally in the housing 20 or to the longitudinal axis 13, the stator 22 of which is encompassed and fixed by the housing 12 without play and its central one
- Rotor 24 consists of a central rotor shaft 25, which is equipped with radially outwardly extending rotor plates.
- the rotor sheets 26 are traversed by an electrical wire winding (not described in more detail), which is electrically connected to a commutator 28 in a known manner.
- the commutator 28 sits at the upper end of the rotor 24 on the rotor shaft 25, the end of which is rotatably mounted in a bearing 29 fixed to the housing.
- the commutator 28 is contacted on opposite sides by two carbon brushes 30 which are supported on the commutator 28 by means of springs 31 which are biased radially inwards.
- the commutator 28 is composed of a plurality of lamellae 32 which are joined to form a ring. These are spaced apart from one another with an electrical insulation 43 forming a small gap.
- the rotor shaft 25 continues as the drive shaft 36, where it rotates a fan (not shown in more detail) and a grinding plate 38.
- FIG. 2 shows a variant of a commutator 28 according to the invention as an enlarged detail. As a result, its structure is clearly recognizable, which is based on a central support cylinder 41, which is encompassed by a tubular insulating layer 43, around which a ring-like packet of elongated, narrow, cross-sectionally V-shaped lamellae 32 is composed.
- Each lamella 32 merges into a hook 50, which is angled outward at right angles and serves as a contact lug for connection to the electrical conductors of the rotor winding, which are not described in more detail.
- Each of the flat-elongated lamellae 32 carries a radially flat, electrical insulating layer 34 adjacent to the next lamellae 32.
- Each lamella 32 has groove-like edge recesses 48 at both ends, which are penetrated by a prestressable ring anchor 40, which holds each individual lamella
- a central recess 42 and a trapezoidal design of the outer fin ends 45 give each individual fin 32 a shape which stiffens its central and end regions in such a way that they do not bulge radially outwards, even at the maximum speed of the rotor.
- the lamella 32 remains flat or straight even at the maximum speed, so that optimal electrical contact with the straight contact surfaces of the carbon brushes 30 is ensured and no convex longitudinal curvatures lead to line contact and thus to increased sparking.
- FIG. 3 shows a cross section of the commutator 28, the laminations 32 of which are V-shaped in cross section and can be seen in their packaging to form an annular structure, and the vertical insulating layer 34 and the hooks 50 can also be seen on the rotor side.
- the hooks 50 are provided with additional, fan-shaped, stamped surfaces for cooling.
- All lamellae 32 are provided with longitudinal recesses 44, 46 which lead through the entire lamella and impart further improved form rigidity or reduce their mass.
- FIG. 4 shows a longitudinal section of a further exemplary embodiment of a commutator 280, the support tube 410 of which is provided with undercut grooves 411, in which a tubular insulating layer 430 engages and holds, which in turn is an annular package of lamellae 32 with hooks 50 and serving as contact lugs central recess 42 wears. These slats 32 are cast with the insulating layer 430 and are held in place by their entry into the edge recesses 48.
- the fins 32 carry fan blades 52 to improve motor cooling in the area of the commutator
- FIG. 5 shows the detail of a lamella 32, its V-shaped cross section and its edge recesses 48 or central recess 42 and longitudinal recesses 44, 46.
- the side surfaces have embossed angular depressions which further stiffen and reinforce the structure of the lamella 32 positive connection with the respective insulating layer 34 improved.
- FIGS. 5, 6 each show an exemplary embodiment of a lamella with trapezoidal outer lamella ends in the area 45, the central transverse recess 42 forming an approximate hexagon and 48 further transverse small triangular openings 55 being arranged between the latter and the edge recesses.
- 66 triangular notches 60 are made in the lower longitudinal edge opposite webs of material.
- FIG. 7 shows a lamella 3200 which essentially corresponds to that of FIG. 5, but in contrast to this has a hook 50 serving as a contact lug with a fan blade 52 or at the other outer end a further fan blade 52 for improving the cooling in the commutator area.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Current Collectors (AREA)
- Motor Or Generator Cooling System (AREA)
- Dc Machiner (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/520,432 US7196440B2 (en) | 2003-04-29 | 2004-04-28 | Electric manual machine tool driven by an electric motor |
JP2006504310A JP2006524979A (ja) | 2003-04-29 | 2004-04-28 | 電気モータ式の駆動装置を有する電動式の手持工作機械 |
EP04729820A EP1620927A1 (de) | 2003-04-29 | 2004-04-28 | Elektrohandwerkzeugmaschine mit elektromotorischem antrieb |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10319460A DE10319460A1 (de) | 2003-04-29 | 2003-04-29 | Elektrohandwerkzeugmaschine mit elektromotorischem Antrieb |
DE10319460.6 | 2003-04-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004098000A1 true WO2004098000A1 (de) | 2004-11-11 |
Family
ID=33305064
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2004/000890 WO2004098000A1 (de) | 2003-04-29 | 2004-04-28 | Elektrohandwerkzeugmaschine mit elektromotorischem antrieb |
Country Status (7)
Country | Link |
---|---|
US (1) | US7196440B2 (de) |
EP (1) | EP1620927A1 (de) |
JP (1) | JP2006524979A (de) |
KR (1) | KR20060022648A (de) |
CN (1) | CN1781222A (de) |
DE (1) | DE10319460A1 (de) |
WO (1) | WO2004098000A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009056537A1 (de) * | 2007-10-29 | 2009-05-07 | Robert Bosch Gmbh | Verfahren zum herstellen eines kommutatorrings für einen rollkommutator einer elektromaschine, sowie elektromaschine |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006024922B4 (de) * | 2005-05-30 | 2016-04-28 | Denso Corporation | Rotierende elektrische Maschine und Anlasser |
DE102008004638A1 (de) * | 2008-01-16 | 2009-07-23 | Robert Bosch Gmbh | Motorisch angetriebene Werkzeugmaschine |
DE102008002608A1 (de) | 2008-06-24 | 2009-12-31 | Robert Bosch Gmbh | Kommutator |
US8508084B2 (en) * | 2008-06-26 | 2013-08-13 | Techtronic Power Tools Technology Limited | Power tool including hybrid electric motor design |
DE102010029543A1 (de) * | 2010-06-01 | 2011-12-01 | Robert Bosch Gmbh | Rotor mit elektrischer Klemmverbindung |
USD706200S1 (en) | 2010-09-22 | 2014-06-03 | Pylon Manufacturing Corporation | Windshield wiper cover |
US9174609B2 (en) | 2011-04-21 | 2015-11-03 | Pylon Manufacturing Corp. | Wiper blade with cover |
US9457768B2 (en) | 2011-04-21 | 2016-10-04 | Pylon Manufacturing Corp. | Vortex damping wiper blade |
CA2843527C (en) | 2011-07-28 | 2018-11-27 | Pylon Manufacturing Corp. | Windshield wiper adapter, connector and assembly |
US9108595B2 (en) | 2011-07-29 | 2015-08-18 | Pylon Manufacturing Corporation | Windshield wiper connector |
US9381893B2 (en) | 2011-07-29 | 2016-07-05 | Pylon Manufacturing Corp. | Windshield wiper connector |
US8806700B2 (en) | 2011-07-29 | 2014-08-19 | Pylon Manufacturing Corporation | Wiper blade connector |
US20130219649A1 (en) | 2012-02-24 | 2013-08-29 | Pylon Manufacturing Corp. | Wiper blade |
US10723322B2 (en) | 2012-02-24 | 2020-07-28 | Pylon Manufacturing Corp. | Wiper blade with cover |
MX364943B (es) | 2012-02-24 | 2019-05-14 | Pylon Mfg Corp | Escobilla limpiaparabrisas. |
US10829092B2 (en) | 2012-09-24 | 2020-11-10 | Pylon Manufacturing Corp. | Wiper blade with modular mounting base |
US10166951B2 (en) | 2013-03-15 | 2019-01-01 | Pylon Manufacturing Corp. | Windshield wiper connector |
US9505380B2 (en) | 2014-03-07 | 2016-11-29 | Pylon Manufacturing Corp. | Windshield wiper connector and assembly |
USD787308S1 (en) | 2014-10-03 | 2017-05-23 | Pylon Manufacturing Corp. | Wiper blade package |
USD777079S1 (en) | 2014-10-03 | 2017-01-24 | Pylon Manufacturing Corp. | Wiper blade frame |
DE102014223544A1 (de) * | 2014-11-18 | 2016-05-19 | Sauer Gmbh | Spindelvorrichtung und Werkzeugmaschine mit Spindelvorrichtung |
EP3368383B1 (de) | 2015-10-26 | 2021-08-04 | Pylon Manufacturing Corp. | Wischerblatt |
US11040705B2 (en) | 2016-05-19 | 2021-06-22 | Pylon Manufacturing Corp. | Windshield wiper connector |
US10513246B2 (en) | 2016-05-19 | 2019-12-24 | Pylon Manufacturing Corp. | Windshield wiper connector |
US10766462B2 (en) | 2016-05-19 | 2020-09-08 | Pylon Manufacturing Corporation | Windshield wiper connector |
WO2017201458A1 (en) | 2016-05-19 | 2017-11-23 | Pylon Manufacturing Corp. | Windshield wiper connector |
WO2017201473A1 (en) | 2016-05-19 | 2017-11-23 | Pylon Manufacturing Corp. | Windshield wiper blade |
FR3098044A1 (fr) * | 2019-06-28 | 2021-01-01 | Valeo Equipements Electriques Moteur | Machine électrique synchrone polyphasée à commutateur mécanique |
FR3098043A1 (fr) * | 2019-06-28 | 2021-01-01 | Valeo Equipements Electriques Moteur | Machine électrique synchrone polyphasée à commutateur mécanique |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE313299C (de) * | ||||
GB453067A (en) * | 1935-04-15 | 1936-09-04 | Andrew Allison | Improvements in or relating to commutators for dynamo electric machines |
GB632020A (en) * | 1948-01-12 | 1949-11-15 | Watliff Company Ltd | Improvements in or relating to electric commutators |
DE891415C (de) * | 1942-03-05 | 1953-09-28 | Siemens Ag | Kollektor |
CH542539A (de) * | 1971-08-25 | 1973-09-30 | Siemens Ag | Kommutator für elektrische Maschinen |
DE7421957U (de) * | 1974-06-25 | 1974-10-03 | Siemens Ag | Kommutator |
GB1505806A (en) * | 1975-04-05 | 1978-03-30 | Meidensha Electric Mfg Co Ltd | Commutation arrangement for a dc machine |
US4562369A (en) * | 1980-12-22 | 1985-12-31 | Kautt & Bux Kg | Commutator and method of manufacture thereof |
Family Cites Families (9)
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US1539068A (en) * | 1923-01-29 | 1925-05-26 | Dorn Electric Tool Company Van | Motor hand tool |
US1822859A (en) * | 1929-06-29 | 1931-09-08 | Singer Mfg Co | Electric motor |
US1826628A (en) * | 1929-08-10 | 1931-10-06 | Westinghouse Electric & Mfg Co | Disk-spring commutator |
US2347056A (en) * | 1943-01-06 | 1944-04-18 | Jack & Heintz Inc | Armature construction |
US2636136A (en) * | 1950-03-31 | 1953-04-21 | Wolf Electric Tools Ltd | Electric motor |
NL101670C (de) * | 1957-09-06 | |||
US3430084A (en) * | 1966-07-06 | 1969-02-25 | Rockwell Mfg Co | Electric motor and brush assembly for a portable tool |
DE3823845A1 (de) | 1988-07-14 | 1990-01-18 | Kautt & Bux Kg | Kommutator und verfahren zu seiner herstellung |
US6958563B2 (en) * | 2003-01-16 | 2005-10-25 | Energy Conversion Systems Holdings, Llc | Riser commutators |
-
2003
- 2003-04-29 DE DE10319460A patent/DE10319460A1/de not_active Withdrawn
-
2004
- 2004-04-28 US US10/520,432 patent/US7196440B2/en not_active Expired - Fee Related
- 2004-04-28 CN CNA2004800116445A patent/CN1781222A/zh active Pending
- 2004-04-28 JP JP2006504310A patent/JP2006524979A/ja active Pending
- 2004-04-28 EP EP04729820A patent/EP1620927A1/de not_active Withdrawn
- 2004-04-28 KR KR1020057020389A patent/KR20060022648A/ko not_active Application Discontinuation
- 2004-04-28 WO PCT/DE2004/000890 patent/WO2004098000A1/de not_active Application Discontinuation
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE313299C (de) * | ||||
GB453067A (en) * | 1935-04-15 | 1936-09-04 | Andrew Allison | Improvements in or relating to commutators for dynamo electric machines |
DE891415C (de) * | 1942-03-05 | 1953-09-28 | Siemens Ag | Kollektor |
GB632020A (en) * | 1948-01-12 | 1949-11-15 | Watliff Company Ltd | Improvements in or relating to electric commutators |
CH542539A (de) * | 1971-08-25 | 1973-09-30 | Siemens Ag | Kommutator für elektrische Maschinen |
DE7421957U (de) * | 1974-06-25 | 1974-10-03 | Siemens Ag | Kommutator |
GB1505806A (en) * | 1975-04-05 | 1978-03-30 | Meidensha Electric Mfg Co Ltd | Commutation arrangement for a dc machine |
US4562369A (en) * | 1980-12-22 | 1985-12-31 | Kautt & Bux Kg | Commutator and method of manufacture thereof |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009056537A1 (de) * | 2007-10-29 | 2009-05-07 | Robert Bosch Gmbh | Verfahren zum herstellen eines kommutatorrings für einen rollkommutator einer elektromaschine, sowie elektromaschine |
US8635760B2 (en) | 2007-10-29 | 2014-01-28 | Robert Bosch Gmbh | Method for producing a commutator ring for an electric machine |
Also Published As
Publication number | Publication date |
---|---|
US20050247468A1 (en) | 2005-11-10 |
DE10319460A1 (de) | 2004-11-18 |
US7196440B2 (en) | 2007-03-27 |
CN1781222A (zh) | 2006-05-31 |
KR20060022648A (ko) | 2006-03-10 |
JP2006524979A (ja) | 2006-11-02 |
EP1620927A1 (de) | 2006-02-01 |
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