WO1998059405A1 - Electric motor for driving a machine - Google Patents

Electric motor for driving a machine Download PDF

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Publication number
WO1998059405A1
WO1998059405A1 PCT/EP1998/003738 EP9803738W WO9859405A1 WO 1998059405 A1 WO1998059405 A1 WO 1998059405A1 EP 9803738 W EP9803738 W EP 9803738W WO 9859405 A1 WO9859405 A1 WO 9859405A1
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WO
WIPO (PCT)
Prior art keywords
motor shaft
electric motor
outer circumference
holding element
motor according
Prior art date
Application number
PCT/EP1998/003738
Other languages
German (de)
French (fr)
Inventor
Hans-Dieter Reinartz
Dieter Dinkel
Original Assignee
Continental Teves Ag & Co. Ohg Inc.
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 Continental Teves Ag & Co. Ohg Inc. filed Critical Continental Teves Ag & Co. Ohg Inc.
Priority to JP50377699A priority Critical patent/JP2002505069A/en
Publication of WO1998059405A1 publication Critical patent/WO1998059405A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
    • H02K5/1677—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4018—Pump units characterised by their drive mechanisms
    • B60T8/4022—Pump units driven by an individual electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • 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
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • H02K7/075—Means for converting reciprocating motion into rotary motion or vice versa using crankshafts or eccentrics
    • 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
    • H02K7/08—Structural association with bearings
    • H02K7/086—Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly

Definitions

  • the invention relates to an electric motor for driving a work machine, in particular a pump unit.
  • a spherical bearing and a roller bearing are used to mount the motor shaft of such an electric motor.
  • the spherical cap bearing is used to support the motor shaft on the bottom of a pot-shaped motor housing.
  • the roller bearing is provided on the output side for support in a pump housing.
  • Such a bearing arrangement requires precise machining of the friction surface on the shaft in the area of the spherical bearing and precise machining of the roller bearing receptacle of the pump housing. Due to inevitable tolerances, there are still cases in which the roller bearing is inserted into the pump housing with too much play. This enables a relative movement of the bearing rings and leads to increased noise and possibly even fretting corrosion with all negative consequences.
  • the object of the present invention is therefore to provide an inexpensive bearing arrangement for a motor shaft which requires few machining steps. Finally, it is a general object of the invention to minimize the space required for mounting the motor shaft for a small size.
  • a tubular motor shaft is provided which is rotatably mounted on a holding element passing through the motor shaft, at least one slide bearing being provided between the motor shaft and holding element such that it engages around the outer circumference of the holding element and the outer circumference of the motor shaft at least in sections.
  • Fig. 1 is a schematic side view of one according to the invention
  • Electric motor for a partially broken pump unit in section Fig. 2 essential parts of the motor shaft bearing in a perspective view.
  • the electric motor 1 schematically shows an electric motor 1 for driving a pump 3 arranged in a housing 2, which pump has at least one pump piston 5 actuated by an eccentric 4.
  • the electric motor 1 has a pot-shaped motor housing 6 on the cylindrical inner wall of which permanent magnets 7, 8 are fastened. At one end, the motor housing 6 has a largely flat bottom 9.
  • Inside the motor housing 6 there is a rotatable rotor 10, which comprises a tubular motor shaft 11 with an armature package 12 and electrical windings 13, 14 fastened thereon.
  • the windings 13, 14 are supplied with electrical current in a generally known manner with the aid of brushes 15, 16 and a commutator 17 and cooperate with the permanent magnets 7, 8 in a likewise known manner.
  • a holding element 18 extends through the housing 2 and the motor housing 6 and absorbs the transverse forces occurring on the pump 3 and on the rotor 10 in a direction perpendicular to the axis 19.
  • the heating element 18 is supported on the housing 2 with the aid of the motor housing 6.
  • the holding element 18 according to the figure is supported directly on the housing 2.
  • the tubular motor shaft 11 is supported on the holding element 18 in each case by a slide bearing 20, 21 on the motor-side shaft end 22 and the output-side shaft end 23.
  • Each slide bearing 20, 21 surrounds the outer circumference 24 of the motor shaft 11 at least in sections and on the other hand at least in sections Outer circumference 25 of the holding element 18.
  • the slide bearings 20, 21 have a disc-shaped base body 26, 27 and an axially projecting socket 28, 28 X arranged parallel to the vertical axis 19.
  • the socket 28 of the slide bearing 20 encompasses the Wellener.de 22 and the Stub 28 'of the plain bearing 21 is assigned to the Wellener.de 23.
  • slide bearings 20, 21 terminate radially outwards with a cylindrical wall, they have a stepped bore radially on the inside, a first bore 29 encompassing the outer circumference 25 of the holding element 18 and a second bore 30 with a larger diameter encompassing the outer circumference 24 of the motor shaft 11 . All bearing seats or friction surfaces are therefore located radially on the inside with respect to the sliding bearings 20, 21 or radially on the outside with respect to the motor shaft 11 and the holding element 18.
  • Each of the slide bearings 20, 21 can also have end faces in the axial direction, which serve to axially support the motor shaft 11.
  • the slide bearing 20 lies with its end face 31 on the inside of the pot base S 1 in a sliding manner.
  • the slide bearing 21 is provided on the output-side motor shaft end 23 and has driver elements in the form of cams 32, 33, 34, 35 for torque-proof transmission of torque from the motor shaft 11 to the working machine.
  • each cam 32,33 engages in a corresponding groove 36,37 in the motor shaft 11 and on the other side each cam 34,35 engages in an associated groove 38,39 in the pump piston 5 Acting eccentric 4. All cams 32,33,34,35 extend for axial assembly in the axial direction ur.d ensure reliable torque transmission c. to the eccentric 4.
  • the output-side slide bearing 21 is fundamentally firmly seated on the motor shaft 11 and the holding element 18 rotates, that is to say, slides around, the other, end-side slide bearing 20 optionally being fixed on the motor shaft 11 or is arranged in the holding element 18 and rotatably encompasses the respectively assigned component 11, 18.
  • FIG. 2 The operation of the output-side slide bearing 21 cils coupling element is also illustrated in Fig. 2. This shows the holding element 18 which passes through the hollow shaft 11, the slide bearing 21 and the eccentric 4. Both the motor shaft 12 and the eccentric 4 are each provided with grooves 36, 38 for engaging the cams 32, 34 provided on the slide bearing 21. If the components are plugged together axially, this results in a positive force transmission from the motor shaft 11 to the eccentric 4.
  • a needle bearing 40 between the eccentric 4 and the holding element 18 and radially on the outside a further needle bearing 41 is provided with an outer ring 42 which acts on the pump piston 5 unc. is supported in the axial direction on the one hand on the end face of the slide bearing 21 and on the other hand on a bottom 43 of a bore 44.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention relates to an electric motor for driving a machine. Said electric motor comprises a pipe-shaped motor shaft (11) and a retaining element (18) passing through same for absorbing transverse load. So as to achieve a space-saving design and allow for cost-efficient production, the pipe-shaped motor shaft (11) is mounted on the retaining element (18) by means of sliding bearings (20, 21) and said sliding bearings (20, 21) enclose the outer circumference (24) of the motor shaft (11) and the outer circumference (25) of the retaining element (18) radially from the outside, at least along some sections. These measures make it possible to machine only the outer circumference (24) of the motor shaft (11). It is not necessary to machine the inner wall. The invention reduces the space required for assembly as it eliminates the need for a radially external bearing housing.

Description

Elektromotor zum Antrieb einer ArbeitsmaschineElectric motor to drive a work machine
Die Erfindung betrifft einen Elektromotor zum Antrieb einer Arbeitsmaschine, insbesondere eines Pumpenaggregats.The invention relates to an electric motor for driving a work machine, in particular a pump unit.
Zur Lagerung der Motorwelle eines derartigen Elektromotors bedient man sich nach dem Stand der Technik eines Kalottenlagers und eines Wälzlagers. Das Kalottenlager dient der Ab- stützung der Motorwelle am Boden eines topfförmigen Motorengehäuses. Das Wälzlager ist abtriebsseitig zur Abstützung in einem Pumpengehäuse vorgesehen. Eine derartige Lageranordnung erfordert präzise Bearbeitungen der Reibfläche an der Welle im Bereich des Kalottenlagers und eine präzise Bearbeitung der Wälzlageraufnahme des Pumpengehäuse. Aufgrund unvermeidlicher Toleranzen treten dennoch immer wieder Fälle auf, bei denen das Wälzlager mit zu großem Spiel in das Pumpengehäuse eingesetzt ist. Dies ermöglicht eine Relativbewegung der Lagerringe, und führt zu erhöhter Geräuschentwicklung und ggf. sogar Passungsrost mit allen negativen Konsequenzen.According to the prior art, a spherical bearing and a roller bearing are used to mount the motor shaft of such an electric motor. The spherical cap bearing is used to support the motor shaft on the bottom of a pot-shaped motor housing. The roller bearing is provided on the output side for support in a pump housing. Such a bearing arrangement requires precise machining of the friction surface on the shaft in the area of the spherical bearing and precise machining of the roller bearing receptacle of the pump housing. Due to inevitable tolerances, there are still cases in which the roller bearing is inserted into the pump housing with too much play. This enables a relative movement of the bearing rings and leads to increased noise and possibly even fretting corrosion with all negative consequences.
Aufgabe der vorliegenden Erfindung ist es daher, eine kostengünstige Lageranordnung für eine Motorwelle bereitzustellen, die wenig Bearbeitungsschritte erfordert. Schließlich ist es eine generelle Aufgabe der Erfindung, den für die Lagerung der Motorwelle notwendigen Raum für eine geringe Baugröße zu minimieren.The object of the present invention is therefore to provide an inexpensive bearing arrangement for a motor shaft which requires few machining steps. Finally, it is a general object of the invention to minimize the space required for mounting the motor shaft for a small size.
Figure imgf000003_0001
Diese Aufgabe wird mit den Merkmalen des Patentanspruches 1 gelöst. Erfindungsgemäß ist eine rohrförmige Motorwelle vorgesehen, welche an einem die Motorwelle durchgreifenden Halteelement drehbar gelagert ist, wobei zwischen Motorwelle und Halteelement mindestens ein Gleitlager derart vorgesehen ist, daß dieses den Außenumfang des Halteelementes und den Außenumfang der Motorwelle zumindest abschnittsweise umgreift.
Figure imgf000003_0001
This object is achieved with the features of claim 1. According to the invention, a tubular motor shaft is provided which is rotatably mounted on a holding element passing through the motor shaft, at least one slide bearing being provided between the motor shaft and holding element such that it engages around the outer circumference of the holding element and the outer circumference of the motor shaft at least in sections.
Mit den Merkmalen des Anspruches 1 ergibt sich der Vorteil, daß "für die Lageraufnahme kein zusätzlicher Bauraum in radialer Richtung erforderlich ist. Für die Abstützung dient der Außenumfang der Motorwelle und der Außenumfang des Halteelementes, so daß eine Bearbeitung nur am Außenumfang erfolgt. Die Innenwandung der Motorwelle weist keinerlei Lagerungsoder Reibflächen auf und kann daher unbearbeitet belassen werden. Die Erfindung erlaubt somit die Verwendung standardisierter, gezogener Rohre als Motorwelle, welche lediglich an dem Außenumfang auf Maß gebracht sind. Dies reduziert den Kosten- und Herstellungsaufwand maßgeblich.With the features of claim 1, there is the advantage that "no additional installation space in the radial direction is required for the bearing support. The outer circumference of the motor shaft and the outer circumference of the holding element are used for the support, so that machining takes place only on the outer circumference. The inner wall The motor shaft has no bearing or friction surfaces and can therefore be left unprocessed. The invention thus allows the use of standardized, drawn tubes as motor shaft, which are only made to measure on the outer circumference. This significantly reduces the cost and production costs.
Weiterbildungen und vorteilhafte Ausgestaltungen der Erfindung gehen aus den abhängigen Patentansprüchen zusammen mit der Beschreibung und der Zeichnung hervor. Die Erfindung wird nachstehend anhand der Zeichnung näher beschrieben. In der Zeichnung zeigt:Further developments and advantageous refinements of the invention emerge from the dependent patent claims together with the description and the drawing. The invention is described below with reference to the drawing. The drawing shows:
Fig. 1 schematische Seitenansicht eines erfindungsgemeßenFig. 1 is a schematic side view of one according to the invention
Elektromotors für eine teilweise abgebrochen gezeichnete Pumpeneinheit im Schnitt; Fig. 2 wesentliche Teile der Motorwellenlagerung in perspektivischer Ansicht.Electric motor for a partially broken pump unit in section; Fig. 2 essential parts of the motor shaft bearing in a perspective view.
Fig. 1 zeigt in schematischer Weise einen Elektromotor 1 zum Antrieb einer, in einem Gehäuse 2 angeordneten Pumpe 3, welche mindestens einen, von einem Exzenter 4 betätigten Pumpenkolben 5 aufweist. Der Elektromotor 1 verfügt über ein topfförmiges Motorengehäuse 6 an dessen zylindrischer Innenwand Permanentmagneten 7,8 befestigt sind. An einem Ende besitzt das Motorengehäuse 6 einen weitgehend ebenen Boden 9. Im Inneren des Motorengehäuses 6 befindet sich ein drehbarer Rotor 10, der eine rohrförmige Motorwelle 11 mit darauf befestigtem Ankerpaket 12 und elektrischen Wicklungen 13,14 umfaßt. Die Wicklungen 13,14 werden in grundsätzlich bekannter Art und Weise mit Hilfe von Bürsten 15,16 und einem Kommutator 17 mit elektrischem Strom gespeist und wirken in ebenfalls bekannter Art und Weise mit den Permanentmagneten 7,8 zusammen.1 schematically shows an electric motor 1 for driving a pump 3 arranged in a housing 2, which pump has at least one pump piston 5 actuated by an eccentric 4. The electric motor 1 has a pot-shaped motor housing 6 on the cylindrical inner wall of which permanent magnets 7, 8 are fastened. At one end, the motor housing 6 has a largely flat bottom 9. Inside the motor housing 6 there is a rotatable rotor 10, which comprises a tubular motor shaft 11 with an armature package 12 and electrical windings 13, 14 fastened thereon. The windings 13, 14 are supplied with electrical current in a generally known manner with the aid of brushes 15, 16 and a commutator 17 and cooperate with the permanent magnets 7, 8 in a likewise known manner.
Durch das Gehäuse 2 und das Motorengehäuse 6 erstreckt sich ein Halteelement 18, welches die an der Pumpe 3 und an dem Rotor 10 auftretenden Querkräfte in einer Richtung senkrecht zu der Achse 19 aufnimmt. Auf der Motorseite ist das Hε.ltee- lement 18 mit Hilfe des Motorengehäuses 6 an dem Gehäuse 2 abgestützt. Pu penseitig ist das Halteelement 18 gemäß der Figur unmittelbar an dem Gehäuse 2 abgestützt.A holding element 18 extends through the housing 2 and the motor housing 6 and absorbs the transverse forces occurring on the pump 3 and on the rotor 10 in a direction perpendicular to the axis 19. On the motor side, the heating element 18 is supported on the housing 2 with the aid of the motor housing 6. On the pen side, the holding element 18 according to the figure is supported directly on the housing 2.
Der Lagerung der rohrförmigen Motorwelle 11 an dem Halteelement 18 dient jeweils ein Gleitlager 20,21 an dem motorseiti- gen Wellenende 22 und dem abtriebsseitigen Wellenende 23. Jedes Gleitlager 20,21 umgreift einerseits zumindest abschnittsweise den Außenumfang 24 der Motorwelle 11 und andererseits zumindest abschnittsweise den Außenumfang 25 des Halteelementes 18. Die Gleitlager 20,21 besitzen einen scheibenförmigen Grundkörper 26,27 und einen axial überstehenden, parallel zur V.'ellen- achse 19 angeordneten Stutzen 28,28X Wie die Figur zeigt, umgreift der Stutzen 28 des Gleitlagers 20 das Wellener.de 22 und der Stutzen 28' des Gleitlagers 21 ist dem Wellener.de 23 zugeordnet. Während die Gleitlager 20,21 nach radial außen mit einer zylindrischen Wandung abschließen, weisen sie radial innen eine Stufenbohrung auf, wobei eine erste Bohrung 29 den Außenumfang 25 des Halteelementes 18 umgreift und eine zweite Bohrung 30 mit größerem Durchmesser den Außenumfang 24 der Motorwelle 11 umgreift. Also befinden sich alle Lagersitze bzw. Reibflächen bezüglich der Gleitlager 20,21 radial innen bzw. bezüglich der Motorwelle 11 und dem Halteelement 18 radial außen.The tubular motor shaft 11 is supported on the holding element 18 in each case by a slide bearing 20, 21 on the motor-side shaft end 22 and the output-side shaft end 23. Each slide bearing 20, 21 surrounds the outer circumference 24 of the motor shaft 11 at least in sections and on the other hand at least in sections Outer circumference 25 of the holding element 18. The slide bearings 20, 21 have a disc-shaped base body 26, 27 and an axially projecting socket 28, 28 X arranged parallel to the vertical axis 19. As the figure shows, the socket 28 of the slide bearing 20 encompasses the Wellener.de 22 and the Stub 28 'of the plain bearing 21 is assigned to the Wellener.de 23. While the slide bearings 20, 21 terminate radially outwards with a cylindrical wall, they have a stepped bore radially on the inside, a first bore 29 encompassing the outer circumference 25 of the holding element 18 and a second bore 30 with a larger diameter encompassing the outer circumference 24 of the motor shaft 11 . All bearing seats or friction surfaces are therefore located radially on the inside with respect to the sliding bearings 20, 21 or radially on the outside with respect to the motor shaft 11 and the holding element 18.
Jedes der Gleitlager 20,21 kann noch in axialer Richtung Stirnflächen aufweisen, welche zur axialen Abstützung der Motorwelle 11 dienen. Beispielsweise liegt das Gleitlager 20 mit seiner Stirnseite 31 an der Innenseite des Topfbodens S1 gleitend an.Each of the slide bearings 20, 21 can also have end faces in the axial direction, which serve to axially support the motor shaft 11. For example, the slide bearing 20 lies with its end face 31 on the inside of the pot base S 1 in a sliding manner.
Wie der Figur ferner zu entnehmen ist, ist das Gleitlager 21 an dem abtriebsseitigen Motorwellenende 23 vorgesehen v.nd weist Mitnehmerelemente in Form von Nocken 32,33,34,35 für eine drehfeste Momentenübertragung von der Motorwelle 11 auf die Arbeitsmaschine auf. Auf der einen Seite greift jeoer Nokken 32,33 formschlüssig in eine zugehörige Nut 36,37 in der Motorwelle 11 und auf der anderen Seite greift jeder Nocken 34,35 in eine zugeordnete Nut 38,39 in dem, den Pumpenkolben 5 beaufschlagenden Exzenter 4. Alle Nocken 32,33,34,35 erstrek- ken sich für eine axiale Montage in axialer Richtung ur.d gewährleisten eine zuverlässige Drehmomentenübertragung c.uf den Exzenter 4.As can also be seen in the figure, the slide bearing 21 is provided on the output-side motor shaft end 23 and has driver elements in the form of cams 32, 33, 34, 35 for torque-proof transmission of torque from the motor shaft 11 to the working machine. On one side each cam 32,33 engages in a corresponding groove 36,37 in the motor shaft 11 and on the other side each cam 34,35 engages in an associated groove 38,39 in the pump piston 5 Acting eccentric 4. All cams 32,33,34,35 extend for axial assembly in the axial direction ur.d ensure reliable torque transmission c. to the eccentric 4.
Hinsichtlich der beiden Gleitlager 20,21 bleibt noch dc.rauf hinzuweisen, daß das abtriebsseitige Gleitlager 21 grundsätzlich fest auf der Motorwelle 11 sitzt und das Halteeleruent 18 drehbar, also gleitend umgreift, wobei das andere, endseitige Gleitlager 20 wahlweise fest auf der Motorwelle 11 oder dem Halteelement 18 angeordnet ist und das jeweils zugeordnete Bauteil 11,18 drehbar umgreift.With regard to the two slide bearings 20, 21, it still remains to be noted that the output-side slide bearing 21 is fundamentally firmly seated on the motor shaft 11 and the holding element 18 rotates, that is to say, slides around, the other, end-side slide bearing 20 optionally being fixed on the motor shaft 11 or is arranged in the holding element 18 and rotatably encompasses the respectively assigned component 11, 18.
Die Wirkungsweise des abtriebsseitigen Gleitlagers 21 cils Kupplungselement wird auch in Fig. 2 verdeutlicht. Diese zeigt das Halteelement 18, welches die Hohlwelle 11, das Gleitlager 21 und den Exzenter 4 durchgreift. Sowohl Motorwelle 12. als auch Exzenter 4 sind jeweils mit Nuten 36,38 zum Eingriff der, an dem Gleitlager 21 vorgesehenen Nocken 32,34 versehen. Werden die Bauteile axial zusammengesteckt, so ergibt sich dadurch eine formschlüssige Kraftübertragung von der Motorwelle 11 auf den Exzenter 4.The operation of the output-side slide bearing 21 cils coupling element is also illustrated in Fig. 2. This shows the holding element 18 which passes through the hollow shaft 11, the slide bearing 21 and the eccentric 4. Both the motor shaft 12 and the eccentric 4 are each provided with grooves 36, 38 for engaging the cams 32, 34 provided on the slide bearing 21. If the components are plugged together axially, this results in a positive force transmission from the motor shaft 11 to the eccentric 4.
Wie Fig. 1 noch zu entnehmen ist, befindet sich zwischen dem Exzenter 4 und dem Halteelement 18 ein Nadellager 40 und radial außen ist ein weiteres Nadellager 41 mit einem Außenring 42 vorgesehen, welcher den Pumpenkolben 5 beaufschlagt unc. sich in axialer Richtung einerseits an der Stirnfläche des Gleitlagers 21 und andererseits an einem Boden 43 einer Bohrung 44 abstützt. As can also be seen in FIG. 1, there is a needle bearing 40 between the eccentric 4 and the holding element 18 and radially on the outside a further needle bearing 41 is provided with an outer ring 42 which acts on the pump piston 5 unc. is supported in the axial direction on the one hand on the end face of the slide bearing 21 and on the other hand on a bottom 43 of a bore 44.

Claims

Patentansprüche claims
1. Elektromotor zum Antrieb einer Arbeitsmaschine, mit einer rohrförmigen Motorwelle (11), welche an einem die otorwel- le 11 durchgreifenden Halteelement (18) drehbar gelagert ist, wobei zwischen Motorwelle (11) und Halteelemer.t (18) mindestens ein Gleitlager (20,21) derart vorgesehen ist, daß dieses den Außenumfang (25) des Halteelementes und den Außenumfang (24) der Motorwelle (11) zumindest abschnittsweise umgreift.1. Electric motor for driving a work machine, with a tubular motor shaft (11) which is rotatably mounted on a holding element (18) penetrating through the motor shaft 11, at least one slide bearing (18) between the motor shaft (11) and holding element (18). 20, 21) is provided such that it engages around the outer circumference (25) of the holding element and the outer circumference (24) of the motor shaft (11) at least in sections.
2. Elektromotor nach Anspruch 1, dadurch gekennzeichnet, daß je ein Gleitlager (20,21) an den Enden (22,23) der Motorwelle 11 vorgesehen ist und deren Außenumfang (24) wellen-2. Electric motor according to claim 1, characterized in that a slide bearing (20, 21) is provided at the ends (22, 23) of the motor shaft 11 and the outer circumference (24) of which is corrugated.
1 endseitig umgreift. 1 engages around the end.
3. Elektromotor nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Gleitlager (20,21) einen scheibenförmigen Grundkörper (26,27) und axial versetzt dazu einen überstehenden, parallel zur Wellenachse (19) angeordneten Stutzen (28,28') aufweist.3. Electric motor according to one or more of the preceding claims, characterized in that the sliding bearing (20,21) has a disk-shaped base body (26,27) and axially offset from it a projecting stub (28,28 ') arranged parallel to the shaft axis (19). ) having.
4. Elektromotor nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Gleitlager (20,21) eine Stufenbohrung aufweist, wobei eine erεte Bohrung (29) den Außenumfang (25) des Halteelementes (18) umgreift und eine zweite Bohrung (30) mit größerem Durchmesser den Außenumfang (24) der Motorwelle (11) umgreift.4. Electric motor according to one or more of the preceding claims, characterized in that the slide bearing (20, 21) has a stepped bore, a first bore (29) engaging around the outer circumference (25) of the holding element (18) and a second bore (30 ) with a larger diameter encompasses the outer circumference (24) of the motor shaft (11).
5. Elektromotor nach einem oder mehreren der vorherge enden Ansprüche, dadurch gekennzeichnet, daß das Gleitlager (20,21) mindestens eine Stirnfläche (31) zur axialen Abstützung der Motorwelle (11) aufweist. 5. Electric motor according to one or more of the preceding claims, characterized in that the sliding bearing (20, 21) has at least one end face (31) for axially supporting the motor shaft (11).
6. Elektromotor nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die abtriebεseitige Stirnseite des Gleitlagers (21) als Anlauffläche für einen Außenring (38) des Exzenters (4) dient.6. Electric motor according to one or more of the preceding claims, characterized in that the end of the slide bearing (21) on the driven side serves as a contact surface for an outer ring (38) of the eccentric (4).
7. Elektromotor nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Gleitlager (20) motorgehauseseitig für eine axiale Abstützung an der Innenseite des Bodens (9) anliegt.7. Electric motor according to one or more of the preceding claims, characterized in that the sliding bearing (20) abuts on the motor housing side for axial support on the inside of the base (9).
8. Elektromotor nach einem oder mehreren der vorherge enden Ansprüche, dadurch gekennzeichnet, daß das Gleitlacer (21) für eine radiale Abstützung an dem abtriabsseitiger Motorwellenende (23) angeordnet ist und Mitnehmerelemente für eine drehfeste Momentenübertragung von der Motorwelle (11) auf die Arbeitsmaschine aufweist.8. Electric motor according to one or more of the preceding claims, characterized in that the Gleitlacer (21) for radial support on the abtriabsseitiger motor shaft end (23) is arranged and driver elements for a torque transmission from the motor shaft (11) to the working machine .
9. Elektromotor nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Gleitlacer (21) an seinen Enden Nocken (32,33,34,35) aufweist, wobei die Nocken (32,33) der einen Seite formschlüssig in die Motorwelle (11) eingreifen und die Nocken (34,35) der anderen Seite formschlüssig in einen Exzenter (4) eingreifen.9. Electric motor according to one or more of the preceding claims, characterized in that the Gleitlacer (21) has cams (32,33,34,35) at its ends, the cams (32,33) on one side positively in the motor shaft (11) engage and engage the cams (34, 35) on the other side with a positive fit in an eccentric (4).
10. Elektromotor nach einem oder mehreren der vorgehenden Ansprüche, dadurch gekennzeichnet, daß die Nocken (32,33,34,35) für eine axiale Montage der Bauteile in axialer Richtung vorstehen. 10. Electric motor according to one or more of the preceding claims, characterized in that the cams (32,33,34,35) protrude for axial assembly of the components in the axial direction.
11. Elektromotor nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das abtriebεseitige Gleitlager (21) fest auf der Motorwelle (11) sitzt und das Halteelement (18) drehbar umgreift, wobei das andere end- seitige Gleitlager (20) wahlweise fest auf der Motorwelle (11) oder dem Halteelement (18) angeordnet ist und das zugeordnete Bauteil (11,18) drehbar umgreift. 11. Electric motor according to one or more of the preceding claims, characterized in that the driven-side slide bearing (21) sits firmly on the motor shaft (11) and rotatably engages around the holding element (18), the other end-side slide bearing (20) optionally being fixed is arranged on the motor shaft (11) or the holding element (18) and rotatably encompasses the associated component (11, 18).
PCT/EP1998/003738 1997-06-19 1998-06-18 Electric motor for driving a machine WO1998059405A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50377699A JP2002505069A (en) 1997-06-19 1998-06-18 Electric motors for drive machines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997126017 DE19726017A1 (en) 1997-06-19 1997-06-19 Electric motor to drive a work machine
DE19726017.9 1997-06-19

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WO1998059405A1 true WO1998059405A1 (en) 1998-12-30

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DE (1) DE19726017A1 (en)
WO (1) WO1998059405A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10131761A1 (en) * 2001-06-30 2003-01-16 Bosch Gmbh Robert Electrical machine
DE102007062383A1 (en) 2007-12-22 2009-06-25 Robert Bosch Gmbh Hollow shaft motor for coupling to a machine shaft
JP6462235B2 (en) * 2014-05-16 2019-01-30 株式会社ミツバ Electric motor with reduction gear
JP6372953B2 (en) * 2014-05-16 2018-08-15 株式会社ミツバ Electric motor with reduction gear
JP2015220864A (en) * 2014-05-16 2015-12-07 株式会社ミツバ Armature, electric motor, and electric motor with speed reducer

Citations (3)

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Publication number Priority date Publication date Assignee Title
DE2264934A1 (en) * 1972-09-14 1975-11-20 Eheim Gunther Rotor bearing for motor-pump set - has bearing socket with elastic bearing cap over shaft end
DE3831457A1 (en) * 1988-09-16 1990-03-22 Licentia Gmbh Electric motor-driven fluid pump
JPH06153444A (en) * 1992-10-29 1994-05-31 Sankyo Seiki Mfg Co Ltd Supporting structure for rotor of motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2264934A1 (en) * 1972-09-14 1975-11-20 Eheim Gunther Rotor bearing for motor-pump set - has bearing socket with elastic bearing cap over shaft end
DE3831457A1 (en) * 1988-09-16 1990-03-22 Licentia Gmbh Electric motor-driven fluid pump
JPH06153444A (en) * 1992-10-29 1994-05-31 Sankyo Seiki Mfg Co Ltd Supporting structure for rotor of motor

Non-Patent Citations (1)

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Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 475 (E - 1601) 5 September 1994 (1994-09-05) *

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JP2002505069A (en) 2002-02-12
DE19726017A1 (en) 1998-12-24

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