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
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
  • H02K15/16—Centering rotors within the stator; Balancing rotors
• • 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
  • H02K5/1672—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 rotary shaft at both ends of the rotor
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49002—Electrical device making
  • Y10T29/49009—Dynamoelectric machine
  • Y10T29/49012—Rotor
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49826—Assembling or joining
  • Y10T29/49945—Assembling or joining by driven force fit
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/53—Means to assemble or disassemble
  • Y10T29/53039—Means to assemble or disassemble with control means energized in response to activator stimulated by condition sensor
  • Y10T29/53061—Responsive to work or work-related machine element
  • Y10T29/53078—Responsive to work or work-related machine element with means to fasten by frictional fitting

Definitions

• the invention relates to an electric machine according to the preamble of patent claim 1.
• Such an electric machine preferably fan drive for a motor vehicle, includes one which is mounted with axial clearance in at least two bearings, wherein at least one bearing is mounted in a bearing seat of a bearing plate and rests directly on the bearing seat.
• the axial play which should be 0.1 to 0.3 mm, for example, is an essential factor to ensure the function of the electric motor.
• the main task is to keep a certain axial clearance between the bearings and the armature free
• the axial clearance should also not be too large, as this has a negative effect on the noise or the vibration behavior (so-called axial vibration) and the service life of the engine.
• climate motors realized via the axial pressing of the bearing plate or the displacement of the bearing plate with additional caulking. Furthermore, it is known to adjust the axial clearance in electric motors by inserting discs of different thickness between rotating and stationary parts. For this purpose, the actual game must be measured and set or compensated with a corresponding number of different thick slices. Finally, it is also known, for example in geared motors, to adjust the axial clearance by turning an axial adjusting screw in a gear housing.
• the electric machine according to the invention with the characterizing features of claim 1 has the advantage that a more accurate adjustment of the anchor longitudinal play is possible. There are no additional components, such as retaining springs necessary. There are no additional processes or process stations, for example, for caulking, a repeat test, etc., necessary. In addition, the part reduction results in a simple engine design.
• an electric machine preferably fan drive for a motor vehicle, provided with a shaft which is mounted with axial play in at least two bearings, wherein at least one bearing in a
• Bearing seat of a bearing plate is fixed and rests directly on the bearing seat, wherein the at least one bearing is a cylindrical bearing with a cylindrical outer circumference and that the bearing seat is a sleeve having a cylindrical inner diameter, in which the cylinder bearing is fixed to the outer periphery with a press fit and thereby achieved friction is held axially in the bearing seat.
• the bearing plate has an outer edge which is attached to a pole ring of the electric machine, preferably rolled, wherein the outer edge of a curved portion adjoins, which protrudes from the pole ring of the electric machine, and wherein the sleeve in the curved region is arranged.
• the strength is increased in the axial direction when the bearing plate has at least one reinforcement for increasing the axial rigidity.
• Such a reinforcement can easily be produced in that at least the curved region has reinforcing beads, which preferably extend in the radial direction.
• the manufacturability is further simplified if the bearing plate a stamped and bent part.
• the curved portion at the same height can be axially steeper, which increases the strength. If the sleeve protrudes from the electric machine, the curved area can be made flatter, whereby the available volume, for example, can be used for a fan excellent.
• the cylindrical bearing is a sintered bearing
• the axial play can be implemented quite easily, since there is no danger of fretting corrosion as in a rolling bearing threatens.
• the thrust washers can also contribute a bit to the damping and thus to a quieter run.
• a second end shield which is opposite to the bearing plate with the cylinder bearing, is mounted in a pole ring of the electric machine, wherein the second bearing plate has at least two protruding from the bearing seat for the bearing bracket that protrude to the temples outward, in Recesses of the pole ring are used, and that in addition to the lobes diametrically formed stops which are arranged within the pole ring and the diametrical distance is smaller than the inner diameter of the pole ring, so that the second bearing plate is mounted floating before mounting, the bearings can be axially be easily aligned. The risk of a difficult run is minimized.
• a method for adjusting the axial play of the shaft of such an electric machine wherein the electric machine is mounted with an axial play that is greater than the specific axial play, the electric machine is fixed, the shaft is pressed against one of the bearings The shaft is then moved in the direction of the other bearing, the displacement is measured until the shaft is pressed against the other bearing, and the cylinder bearing is pressed in the direction of the other bearing until the specific axial clearance is reached.
• the shaft is pressed with a force against the one bearing, which compresses a thrust washer arranged there, that the shaft is then pressed with a force against the other bearing, which also compresses a thrust washer arranged there, and that the two dimensions, To which the thrust washers are pressed together to be added to the displacement, the axial play can be adjusted even more precisely, since these elastic components of the thrust washers are included.
• the shaft is again pressed against one of the bearings after adjusting the axial play, then moved in the direction of the other bearing, wherein the displacement is measured again until the shaft is pressed against the other bearing, and the measured displacement again with a predetermined Value is compared, so can also perform a quality control on the same station, whereby a downstream station can be omitted.
• the method for adjusting the axial clearance is simply repeated.
• An apparatus for carrying out the method comprises a device for displacing the cylinder bearing, on which the shaft is inserted and which bears against the cylinder bearing, a pin which is arranged in the device, for displacing the shaft away from the cylinder bearing, a holder for holding the electric Machine, a pin for moving the shaft against the cylinder bearing and a measuring device for measuring the axial play.
• FIG. 1 shows an electrical machine in a longitudinal section
• FIG. 2 shows the electric machine in a perspective view
• FIG. 3 shows a bearing bracket of the electrical machine
• FIG. 4 shows the electrical machine with a modified end shield
• Figure 5 shows the modified end shield
• Figure 6 another modified end shield.
• a rotating electric machine is simplified in a longitudinal section.
• the electric machine is an electric motor 10, which is used in a motor vehicle, for example in a window lift, wiper drive, preferably a heating and / or fan drive, etc. However, it can also be a generator.
• the electric motor 10 has a wound armature 12 which is arranged on a shaft 14.
• the armature 12 is connected to a commutator 16, which is connected by brushes 18 of a brush holder 20.
• commutator 16 may also be provided a collector of a generator.
• the shaft 14 is mounted in a spherical bearing 22 and a cylinder bearing 24.
• the bearings 22, 24 are sintered bearings or sliding bearings, which are impregnated with oil.
• the spherical bearing 22 is arranged on a bearing bracket 26 in the region of the brush holder 20.
• the cylinder bearing 24 is arranged on the output side in a bearing plate 28.1.
• Bearing shield 28.1 in turn are arranged on the two end faces of a pole ring 30.
• a thrust washer 32 is arranged with a receiving bore 34 for the shaft 14 on the shaft 14.
• a further thrust washer 32 is arranged between the other bearing 24 and the armature 12 and another component, such as a sleeve, the collar of an insulating lamellae, etc..
• this can also be omitted or provided a differently shaped thrust washer.
• the shaft 14 by means of the bearings 22, 24 has a certain axial play.
• the specific axial clearance should only be as large as necessary to allow temperature-induced changes in length of the components; it should be as small as possible so that the shaft can not make excessive axial movements.
• a use of rolling bearings is therefore difficult, as a result of the axial play Relative movement between rotating and moving parts would be possible, which would lead to fretting corrosion.
• the output-side bearing plate 28.1 has a projecting into the electric motor 10 bearing seat in the form of a first sleeve 36.1 for the cylinder bearing 24, which is provided with a cylindrical inner diameter.
• the cylindrical bearing 24 is attached to the outer circumference via a press fit and is axially held in the bearing seat by the frictional engagement achieved thereby.
• the cylinder bearing 24 is directly and without the interposition of a suspension, as is the case for example with spherical bearings, on the inner diameter of the bearing seat.
• an annular, curved portion 38 is formed, which protrudes from the pole ring 30 of the electric motor 10.
• a disk-shaped, outer edge 40 is formed around the curved area 38.
• the bearing plate 28.1 is attached to the pole ring 30.
• the edge 40 is rolled into a groove 42 of the pole ring 30.
• the bearing plate 28.1 may also be formed integrally with the pole ring 30. This is possible, for example, by the pole ring 30 is deep-drawn with the then integrally formed bearing plate 28.1.
• the rolled-up variant, however, is cheaper to produce.
• the pole ring 30 is preferably rolled.
• the bearing plate 28.1 is a stamped and bent part, wherein the sleeve 36.1 is deep-drawn.
• the end shield 28.1 has reinforcements for increasing the axial rigidity.
• reinforcing beads 38 are formed in the curved area, which preferably extend in the radial direction. This will be discussed in more detail.
• FIG. 2 shows a perspective view of the electric motor 10, in which details of the bearing bracket 26 arranged in the region of the brush holder 20 are shown more clearly. In the figure 3, the bearing bracket 26 is shown alone.
• the bearing bracket 26 which is opposite to the bearing plate 28.1 with the cylinder bearing 24, is attached to the pole ring 30.
• the bearing bracket 26 comprises a spherical bearing seat 44 for the spherical bearing 22.
• the spherical bearing 22 is held on the bearing bracket 26 via a clamping gland 45 (FIG. 1).
• From the bearing seat 44 are two brackets 46. It can too more than two brackets 46 may be provided.
• the bearing bracket 26 may be formed around the bearing seat 44 as the bearing plate 28.1. In both cases, the bearing bracket 26 can be generally referred to as a bearing plate.
• the brackets 46 On the brackets 46 are tabs 48, which are inserted into recesses 50 of the pole ring 30.
• the tabs 48 have a width 52 which is smaller than the width 54 of the recesses. It is a range of 0.1 to 0.3 mm.
• diametrically opposite edges 56 are formed, beyond which the tabs 48 protrude, so that they can be arranged in the recesses 50.
• the edges 56 have a smaller diametrical distance 58 as the lobes 48.
• the diametrical distance 56 is also smaller than the inner diameter 30 of the pole ring 30. As a result, they are arranged in the inner diameter of the pole ring 30. This has the consequence that the bearing bracket 26 is mounted floating before assembly. The floating bearing is important for a mounting in which the shaft 14 remains smooth. This will be discussed in more detail.
• the electric motor 10 still has a connected to the brush holder 20 or integrally connected thereto connector 62. This is inserted in a window 64 in the pole ring 30.
• the window 64 is one of at least one of the two diametrically opposite recesses 50 outgoing recess, which is preferably slightly narrower than the recess 50.
• End shield 28.1 connected by the edge 40 is rolled into the groove 42. If the pole ring 30 and the bearing plate 28.1 are deep-drawn, this is not necessary. Thereafter, the armature 12 with the shaft 14 and the previously plugged thrust washer 32 is inserted, the shaft 14 is inserted into the cylinder bearing 26. In the next step, the brush holder is attached to the pole ring 30. Subsequently, the bearing bracket 26 is inserted with the spherical bearing 24 on the shaft 14. The tabs 48 are placed in the groove-shaped recesses 50. The edges 56 are located within the pole ring 30. The bearing bracket 26 has now due to the floating bearing radial clearance when it rests on the pole ring 30.
• the bearing bracket 26 radially align when it is plugged onto the shaft 14.
• the spherical bearing 22 and the cylinder bearing 24 are thus aligned with each other.
• the bearing bracket 26 is then with a
• the electric motor 10 is next set with the shaft 14 ahead on a pipe 66.
• the electric motor 10 is preferably perpendicular to the tube 66, wherein the cylinder bearing 24 is directed downward.
• Outer diameter 68 of the tube 66 is as slightly as possible smaller than the inner diameter of the sleeve 36.1. Then the electric motor 10 is held or fixed with lateral grippers 70 or hold-downs of an NC joining module. Now moves from above a pin 72 to the shaft 14 so that the shaft 14 is pressed with a predetermined force against the cylinder bearing 24.
• the pin 72 is shown in simplified form
• Length measuring device 74 coupled.
• the shaft 14 is preferably pressed with a force against the cylinder bearing 24, which compresses the thrust washer 32 slightly. Also, the shaft 14 is pressed with a force against the spherical bearing 22, which slightly compresses the thrust washer 32 there. In both cases, this is done so far that the elasticity of the Thrust washers 32 is taken into account. The two dimensions by which the thrust washers 32 have been compressed are added to the displacement path.
• a measure is also determined so that the bearing plate 28.1, in which the cylinder bearing 24 is arranged, at least elastically bends when pressing the cylinder bearing 24.
• the cylindrical bearing 24 is also at least partially pressed by this measure in the sleeve 36.1.
• Anchor 12 is pushed upwards with a defined force, the thus determined actual value is transmitted directly to the control of the displacement mechanism in the form of the tube 66, which is coupled to a controller of an NC joining module, and charged. After this measurement process, the pin 72 continues to be approached with the length measuring device 74. This now has the task in the subsequent process step
• the NC joining module now moves onto the cylindrical bearing end face via a probing function, the blocking force being approximately 150N, storing this absolute position and now moving the cylindrical bearing 24 with a displacement force of approximately 1 kN, controlled by the external measuring mimic of the length measuring device 74 to the desired position.
• Regulating mechanism ensures a stiffness mode in the NC control of the joint module for the already described compensating the deflection of the end shield 28.1.
• the shaft 14 After adjusting the axial clearance, the shaft 14 is pressed again against the cylinder bearing 24. Thereafter, the shaft 14 is again pressed against the spherical bearing 22, wherein the displacement is measured again. The again measured displacement is compared with a predetermined value. In the case of too large again measured displacement, the process for adjusting the axial clearance is performed again.
• the electric motor 10 is shown with a modified end shield 28.2.
• a sleeve 36.2 protrudes from the electric motor 10 and the pole ring 30 out.
• the remaining components and assemblies have the same reference numerals as described with reference to FIGS. 1, 2 and 3. Therefore, reference is made to the local authorities.
• the bearing plate 28.2 is clearly visible in the figure 5 and also the already described beads 78 are visible.
• the bearing plate 28.2 is not circular, but has four flats 80. This also allows the pole ring 30, as shown in Figure 2 is flattened, resulting in a smaller space. Pairwise diametrically opposed flats 80 have the same distance from each other. As a result, the bearing plate can be mounted 28.2 variable.
• a circular bearing plate 28.3 is shown in FIG.
• the bearing plates 28 can be designed as a bearing bracket.
• a device for carrying out the described method thus comprises a device 66 for displacing the cylindrical bearing 24, which rests on the cylinder bearing 24 and on which the shaft 14 is inserted, a pin 76 for displacing the shaft 14 away from the cylinder bearing 24, a holder 70 for holding the electric motor 10, a pin 72 for displacing the shaft 14 against the cylinder bearing 24 and means 74 for measuring the axial play.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Motor Or Generator Frames (AREA)
• Support Of The Bearing (AREA)
• Sliding-Contact Bearings (AREA)
• Mounting Of Bearings Or Others (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=35276091

Family Applications (1)

Country Status (8)

Families Citing this family (9)

Family Cites Families (24)

• 2004
  • 2004-09-21 DE DE102004045626A patent/DE102004045626A1/de not_active Withdrawn
• 2005
  • 2005-08-17 US US11/575,712 patent/US20080093937A1/en not_active Abandoned
  • 2005-08-17 KR KR1020077006445A patent/KR20070054211A/ko not_active Application Discontinuation
  • 2005-08-17 CN CN2005800316592A patent/CN101023571B/zh not_active Expired - Fee Related
  • 2005-08-17 WO PCT/EP2005/054063 patent/WO2006032587A1/de active Application Filing
  • 2005-08-17 EP EP05777796A patent/EP1794867A1/de not_active Withdrawn
  • 2005-08-17 JP JP2007532873A patent/JP2008514182A/ja active Pending
  • 2005-08-17 MX MX2007003345A patent/MX2007003345A/es not_active Application Discontinuation

Non-Patent Citations (1)

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