WO2009000632A2 - Moteur électrique et procédé de fabrication d'un moteur électrique - Google Patents

Moteur électrique et procédé de fabrication d'un moteur électrique Download PDF

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Publication number
WO2009000632A2
WO2009000632A2 PCT/EP2008/057146 EP2008057146W WO2009000632A2 WO 2009000632 A2 WO2009000632 A2 WO 2009000632A2 EP 2008057146 W EP2008057146 W EP 2008057146W WO 2009000632 A2 WO2009000632 A2 WO 2009000632A2
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
bearing flange
housing
electric motor
flange
Prior art date
Application number
PCT/EP2008/057146
Other languages
German (de)
English (en)
Other versions
WO2009000632A3 (fr
Inventor
Marcel Fankhauser
Gerhard Oberli
Roland Schrag
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP08760714A priority Critical patent/EP2162972A2/fr
Publication of WO2009000632A2 publication Critical patent/WO2009000632A2/fr
Publication of WO2009000632A3 publication Critical patent/WO2009000632A3/fr

Links

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
    • H02K5/15—Mounting arrangements for bearing-shields or end plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/042—Housings for rolling element bearings for rotary movement
    • F16C35/045—Housings for rolling element bearings for rotary movement with a radial flange to mount the housing
    • 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
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing
    • 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
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers

Definitions

  • the invention relates to an electric motor and a method for producing an electric motor according to the preambles of the independent claims.
  • Electric motor is exposed to an elevated operating temperature. Dust and concrete particles however, they can hardly be effectively prevented.
  • the tooling costs of the injection molds for the housing shells are very expensive, as well as changes in the tools. With high costs and increased deadline, it may be necessary to make subsequent corrections.
  • the invention relates to an electric motor with a housing and a first and a second bearing flange.
  • a housing edge is crimped circumferentially radially inwards over at least one of the bearing flanges.
  • a tight connection between the housing and the bearing flange is achieved.
  • the electric motor is protected against ingress of foreign bodies and dust.
  • the manufacturing costs are advantageously low, and there is a high process capability, so that the electric motor can be advantageously produced in larger series.
  • the connection between the housing and bearing flange is uncritical to temperature changes and can be used over wide temperature ranges. An axial load of the bearing flange during operation of the electric motor is low because the connection is made via a positive connection. The life and reliability of the electric motor is increased.
  • the housing edge can fit positively against the at least one bearing flange.
  • a high tightness can be improved. It can be achieved a high axial strength over the entire operating temperature range of the electric motor.
  • the at least one bearing flange has a shoulder arranged concentrically with respect to a rotation axis, against which the edge of the housing abuts in radial circumferential direction, the mechanical stability and dimensional stability of the connection between housing and bearing flange can be further improved.
  • the at least one bearing flange having a bearing in a bearing seat, wherein the bearing is overlapped by a flanged contour on its flanschabgewandten side edge.
  • the contour is preferably formed by tangential rivets until it rests positively on the edge of the bearing.
  • the bearing is held so that mechanical stresses or tilting can be avoided. The bearing wear can be reduced.
  • the invention is further based on a method for producing an electric motor, in which a housing is connected to at least one bearing flange.
  • a stamp on a bowling alley rotates about an inserted into the housing bearing flange and the housing at its housing edge circumferentially applies to the bearing flange.
  • the process can be easily integrated into a series production and causes only low production costs. High process reliability and process stability can be achieved.
  • the process is controllable by an online process monitoring and thus particularly inexpensive and reliable.
  • the punch with feed and contact pressure can drive continuously on the edge of the housing.
  • the trajectories of the stamp can be adjusted reproducibly, for example with a conventional process control.
  • the housing edge can conveniently be crimped over the bearing flange until a positive connection between the edge of the housing and the bearing flange is formed.
  • An exact end point of the forming is easily adjustable.
  • Voreilhaftate a bearing can be used in the bearing flange and rolled from a Lagerflanschabgewandten side of the bearing ago a punch on a bowling alley over a contour and a part of the contour are radially inwardly folded so that the bearing flange is overlapped by the contour.
  • the bearing is exposed during connection to the bearing flange only low loads. Contrary to a widespread assumption, the realization of a particular fixed bearing side is very demanding. In industrially manufactured engines, it can easily lead to a misalignment of the sensitive ball bearings. This in turn can lead to a poorer efficiency of the electric motor to excessive bearing wear.
  • the invention is further based on a bearing flange of an electric motor, wherein the bearing flange has an axis of rotation.
  • a low-cost and highly stable connection with a motor housing can be made with the bearing flange.
  • connection is improved if the contour can be rounded in the axial direction.
  • the bearing flange having a bearing seat with a bearing body, wherein the bearing body is overlapped on its lagerflanschabgewandten side of the material of the bearing seat.
  • the bearing body is overlapped on its lagerflanschabgewandten side of the material of the bearing seat.
  • a power tool in particular a power tool with a striking and / or rotationally driven insert tool, with an electric motor and at least one bearing flange, each having at least one of the features described above. Due to the design-related temperature resistance of the bearing flange housing connection and / or the bearing-Lagerflanschriv, the high-quality electric motor has properties that are superior to other electric motors.
  • the preferred power tool is correspondingly robust and reliable.
  • FIG. 2 shows a longitudinal section through a preferred bearing flange for a fixed bearing.
  • 3a shows a longitudinal section through a preferred bearing flange for a fixed bearing after the inclusion of the bearing in the bearing flange.
  • 3b shows a longitudinal section through a preferred bearing flange for a fixed bearing before inserting the bearing in the bearing flange.
  • FIG. 4a, 4b different views of a preferred housing for an electric motor.
  • 5a shows a longitudinal section through a preferred electric motor prior to the connection of bearing flanges with a housing of the electric motor.
  • Fig. 5b is a longitudinal section through a preferred electric motor according to the
  • FIG. 6 shows a preferred power tool.
  • FIGS. 1 and 2 show longitudinal sections of two
  • Bearing flanges 10 and 40 wherein the first bearing flange 10 is formed for a fixed bearing and the second bearing flange 40 for a floating bearing.
  • the bearing flange 10 has a first side 12, which faces the electric motor in the assembled state and a second side 14, which faces outward in the mounted state.
  • a bearing 30 is used with a rotation axis 64, which faces with its outer side 32 a rotor of the electric motor.
  • the bearing flange 10 has a rounded contour 24, which tapers towards the second side 14 and ends in a shoulder 26. This serves as a stop in the preparation of the connection between a motor housing and the bearing flange 10th
  • FIG. 2 shows a further embodiment of a bearing flange 40, which is suitable, for example, for a movable bearing, which in principle has a similar construction.
  • the bearing flange 40 has a - in the assembled state - a side facing the rotor 42 and an opposite, outwardly facing side 44. In a bore 46, a bearing can be received, which has a rotation axis 64.
  • the bearing flange 40 Starting from an edge 48 with a larger diameter, here the largest diameter of the bearing flange 40, the bearing flange 40 has a rounded contour 50, which tapers towards the second side 44 and merges into a planar surface piece.
  • FIGS. 3a and 3b disclose a further preferred embodiment of the bearing flange 10 of FIG. 1, as it can be used for a fixed bearing. To avoid unnecessary repetition, reference is made to the description of FIG. 1 for the same elements.
  • the bearing flange 10 additionally has a connection piece 28, which protrudes outward on the rotor-remote side 14.
  • the nozzle 28 can serve for rotor bearings.
  • the bearing 30 is inserted into the bearing seat 16 and is overlapped by the edge 22 of the ring 20.
  • Fig. 3b shows the bearing flange 10 in the initial state without bearing 30.
  • the formed as Nietkontur edge 22 of the ring 20 has at the radially outer end of a chamfer, which facilitates the folding of the edge 22 during forming. Visible is a notch 24a, which is incorporated in the edge-side contour 24.
  • One or more such notches 24a serve for torque transmission between the bearing flange 10 and a motor housing.
  • a gear via end screws which are screwed into unspecified holes in the bearing flange 10, flanged to the bearing flange 10.
  • the notches 24a serve to increase a holding force between the bearing flange 10 and the housing by means of a preferred tangential riveting, as described in FIGS. 5a, 5b.
  • a holding force that is frictionally engaged without notches 24a may be too small to safely transmit the engine torque.
  • the forming process of the edge 22, which is preferably a tangential rivets follows.
  • tangential riveting a flat rivet on the rotates rotor-facing side 12 of the bearing flange 10 on a bowling alley, whose apex is located on the axis of rotation 64 of the bearing 30.
  • the riveting punch is continuously on the bearing flange 10 and thus on the Nietkontur (edge 22).
  • the edge 22 is thereby "pushed in” continuously into the bearing seat 16.
  • the deformation is continued until the previously projecting edge 22 no longer protrudes substantially from the end face of the bearing flange 10. In this case, an exact end point of the deformation can be set.
  • a preferred housing 92 of an electric motor is shown in Figs. 4a and 4b in different views.
  • the housing 82 has a cylindrical
  • Section 92 on with an upper edge 88 and a lower edge 90. Radially inside a shoulder 84 is formed at the upper edge 88 and at the lower edge 90 a shoulder 86 on which the bearing flanges are to rest later.
  • a cutout 94 in the cylindrical portion 92 serves to lead out electrical connections of a winding body, via which it can be energized in operation.
  • a groove 96 is provided in the cylindrical portion 92, which can facilitate the forming process.
  • Figures 5a and 5b show a preferred electric motor 100 in the assembled state ( Figure 5a) and after closing the housing 82 ( Figure 5b).
  • a bearing flange 10 is used with a trained as a fixed bearing 30 at the upper edge 88 and at the lower edge 90, a bearing flange 40 with a designed as a floating bearing 52.
  • Figs. 4a, 4b For the description of the housing 82, reference is made to Figs. 4a, 4b and for describing the bearing flanges 10 and 40 to the description of Figs. 1, 2, 3a and 3b to avoid unnecessary repetition.
  • the bearings 30, 52 support a rotor shaft 62 of a rotor 60.
  • a fan 80 which can be driven by the rotor shaft 62, is arranged on the outer side of the bearing flange 40.
  • a permanent magnet 66 is attached on the rotor shaft 62.
  • the rotor 60 is surrounded by a stator 70, which comprises a stator iron package 72 and a winding body 74 which is radially enclosed by the stator iron package 72.
  • the winding body 74 is arranged in an air gap between the rotor 60 and stator iron package 72.
  • the electric motor 100 is preferably an electronically commutating motor with air gap winding.
  • Fig. 5a it can be seen that the edges 88, 90 of the housing 82 protrude from the rounded contours 24, 50 of the bearing flanges 10, 40.
  • FIG. 5b shows the electric motor 100 with closed housing 82.
  • the upper end 88 is close to the Kontor 24 of the bearing flange 10
  • the lower end 90 of the housing 82 is close to the contour 50 of the bearing flange 40 at.
  • the preferred method is a Tangentialniet compiler and takes place so that after - usually manually - inserting the bearing flanges 10, 40 a riveting on the respective edge 88, 90 of the housing 82 rotates on a bowling alley, the apex is located on the axis of rotation 64.
  • the riveting punch continuously drives the housing 82 and thus the contour 24, 50, which form the rivet contours.
  • the edges 88, 90 are successively crimped over the respective bearing flange 10, 40 or its contour 24, 50, until a desired, clean fit has been set. If one or more notches 24a are provided (FIG.
  • the material is "pushed" into the notches 24a in the hundredth to tenths of a millimeter range, which is favorable for an advantageous form-locking force transmission between the housing 82 and the bearing flange 10, FIG. on which a gearbox is flanged.
  • the bearing flange 10 can be used with mounted bearing 30, the upper edge of the housing 88 are connected to the bearing flange 10 as described by tangential rivets. Then stator 70 and rotor 60 can be mounted with the further bearing flange 40 with the bearing 50, whereupon the lower housing edge 90 is positively connected to the bearing flange 40 by tangential rivets.
  • the fan can be mounted before connecting housing 82 and bearing flange 40. It is also conceivable to assemble all the parts and then first to connect one of the two bearing flanges 10 or 40 and then the other to the housing 82. Optionally, both housing edges 88, 90 can be connected simultaneously with the bearing flanges 10, 40, with appropriate tool.
  • FIG. 6 shows a preferred power tool 110 for battery or mains operation in the form of a power tool 110 with a striking and / or rotationally drivable insert tool 12.
  • the power tool 110 has a preferred electric motor 100 with air gap winding, as described above in FIGS and 5b.
  • the power tool 110 may in particular a be highly stressable power tool 1 10, about an industrial screwdriver, a cordless screwdriver or a hammer drill.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

L'invention concerne un moteur électrique présentant un carter () ainsi qu'un premier et un second flasque de palier (10, 40). Selon l'invention, un bord (88, 90) du carter est rabattu radialement vers l'intérieur sur tout le pourtour d'au moins un des flasques de palier (10, 40).
PCT/EP2008/057146 2007-06-27 2008-06-09 Moteur électrique et procédé de fabrication d'un moteur électrique WO2009000632A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08760714A EP2162972A2 (fr) 2007-06-27 2008-06-09 Moteur électrique et procédé de fabrication d'un moteur électrique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007029743.4 2007-06-27
DE102007029743A DE102007029743A1 (de) 2007-06-27 2007-06-27 Elektromotor und Verfahren zur Herstellung eines Elektromotors

Publications (2)

Publication Number Publication Date
WO2009000632A2 true WO2009000632A2 (fr) 2008-12-31
WO2009000632A3 WO2009000632A3 (fr) 2009-03-19

Family

ID=40017583

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/057146 WO2009000632A2 (fr) 2007-06-27 2008-06-09 Moteur électrique et procédé de fabrication d'un moteur électrique

Country Status (3)

Country Link
EP (1) EP2162972A2 (fr)
DE (1) DE102007029743A1 (fr)
WO (1) WO2009000632A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011016952A1 (de) * 2011-04-12 2012-10-18 E. Ernst GmbH Umformtechnik Verfahren und Vorrichtung zur Herstellung eines metallischen rotationssymmetrischen Sitzes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018126852A1 (de) * 2018-10-26 2020-04-30 Kuka Deutschland Gmbh Lageranordnung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3840273A1 (de) * 1988-11-30 1990-05-31 Vdo Schindling Lagerschild fuer den antriebsmotor einer foerderpumpe
DE3913176A1 (de) * 1989-04-21 1990-10-25 Licentia Gmbh Arbeitsverfahren zur axialen und radialen fixierung von kugellagern
JPH09205751A (ja) * 1996-01-25 1997-08-05 Mitsumi Electric Co Ltd 小型モータ
DE19933999A1 (de) * 1999-07-20 2001-01-25 Mannesmann Vdo Ag Für einen Einsatz in Umgebungen mit hohen Temperaturen vorgesehener Elektromotor
WO2003056197A1 (fr) * 2001-12-21 2003-07-10 Robert Bosch Gmbh Flasque pour moteur electrique, et moteur electrique correspondant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3840273A1 (de) * 1988-11-30 1990-05-31 Vdo Schindling Lagerschild fuer den antriebsmotor einer foerderpumpe
DE3913176A1 (de) * 1989-04-21 1990-10-25 Licentia Gmbh Arbeitsverfahren zur axialen und radialen fixierung von kugellagern
JPH09205751A (ja) * 1996-01-25 1997-08-05 Mitsumi Electric Co Ltd 小型モータ
DE19933999A1 (de) * 1999-07-20 2001-01-25 Mannesmann Vdo Ag Für einen Einsatz in Umgebungen mit hohen Temperaturen vorgesehener Elektromotor
WO2003056197A1 (fr) * 2001-12-21 2003-07-10 Robert Bosch Gmbh Flasque pour moteur electrique, et moteur electrique correspondant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011016952A1 (de) * 2011-04-12 2012-10-18 E. Ernst GmbH Umformtechnik Verfahren und Vorrichtung zur Herstellung eines metallischen rotationssymmetrischen Sitzes

Also Published As

Publication number Publication date
DE102007029743A1 (de) 2009-01-08
WO2009000632A3 (fr) 2009-03-19
EP2162972A2 (fr) 2010-03-17

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