EP1556875A1 - Verfahren und vorrichtung zur herstellung einer bürstenanordnung - Google Patents
Verfahren und vorrichtung zur herstellung einer bürstenanordnungInfo
- Publication number
- EP1556875A1 EP1556875A1 EP03772242A EP03772242A EP1556875A1 EP 1556875 A1 EP1556875 A1 EP 1556875A1 EP 03772242 A EP03772242 A EP 03772242A EP 03772242 A EP03772242 A EP 03772242A EP 1556875 A1 EP1556875 A1 EP 1556875A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- brush
- brush holder
- side wall
- die
- holder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H01R39/38—Brush holders
- H01R39/40—Brush holders enabling brush movement within holder during current collection
Definitions
- the present invention relates to a method and a device for producing a brush arrangement with a brush and a brush holder.
- the brush arrangement is used for a dynamo-electric machine, for example for an electric motor with a commutator.
- Brushes usually made of carbon, are used in dynamo-electrical machines to establish electrical contact between a generally fixed part, the stator, and a moving part, the rotor.
- the brush makes contact between a power supply or external connections and windings of the rotor.
- the brush is in sliding contact with a current collector, the commutator on the rotor.
- the commutator has lamellas on which the brush slides along to produce the electrical contact.
- Different brush designs are known.
- One of these designs provides that the brush is slidably guided in a spatially fixed brush holder, which is also referred to as a brush holder or brush sleeve.
- the brush is loaded with a spring in the direction of the commutator. This ensures an essentially constant pressing force of the brush on the commutator and the brush is tracked within the brush holder to compensate for the wear that occurs.
- brushes in which there is a relatively large lateral play between the holder and the carbon brush often result from previous manufacturing processes. This has the consequence that a disadvantageous noise is produced during the operation of the electric motor, namely because the brush strikes the inner walls of the quiver as soon as the brush hits a fin end on the commutator.
- a method for producing a brush arrangement would also be conceivable, in which the brush holder is initially aligned with a calibration piece that is inserted into the brush holder, or is at least partially adapted to the shape of the calibration piece.
- the calibration piece would subsequently be removed in order to mount the brush carbon in the brush holder.
- the relevant external dimensions of the brush carbon would have to be somewhat smaller than the relevant internal dimensions of the brush holder. This would result in a large play between the brush and the brush holder, which would lead to the disadvantageous impact noise mentioned above in the operation of the electric motor.
- the present invention was therefore based on the object of providing a method and a device for producing a brush arrangement, which results in a brush arrangement which operates with little noise.
- a method for producing a brush arrangement with a brush and a brush holder for a dynamo-electric machine, in particular for an electric motor with a commutator, wherein (i) the brush and the Brush holders are joined so that there is play between the two in at least one spatial direction and (ii) the brush holder is deformed in the spatial direction until the game disappears.
- the method according to the invention also enables the contours of the brush holder to be individually adapted to the contours of the brush.
- the brush carbon is usually produced by separating the brush carbons from a large cuboidal coal piece. High manufacturing tolerances must be tolerated here. If, as is the case with the method according to the invention, the brush holder is individually adapted to the brush, these high manufacturing tolerances no longer play a role in the production of the brush carbon.
- the brush holder can be optimally adapted to the brush carbon, and minimal play between the brush and the brush holder can be achieved.
- the method according to the invention also has the advantage that there is hardly any friction between the two due to the minimal but existing play between the brush and the brush holder. This makes it possible to use a spring with a relatively low spring force for tracking the brush in the brush holder, which in turn has the advantage that the brush on the lamellae of the commutator is only exposed to relatively little wear.
- the deformation of the brush holder to be carried out in process step (ii) is preferably partly plastic and partly elastic.
- the plastic component of the deformation enables an exact adjustment regardless of the exact dimensions of the single brush.
- the elastic component advantageously leads to a springback of the brush holder in the direction of its original shape, ie it does not completely assume the relevant dimensions of the brush, as a result of which there is minimal play between the brush and the brush holder.
- a partially plastic and partially elastic deformation can be achieved, for example, by manufacturing the brush holder from a metal sheet.
- the ratio of elastic to plastic deformation can be set by a suitable choice of material, wall thickness and cross section of the brush holder.
- the brush holder is preferably deformed locally on part of at least one side wall of the brush holder.
- the local deformation has the advantage that it is easy to implement in terms of production technology and is therefore also inexpensive.
- the brush holder comprises mutually facing rails with guide surfaces which define the play in at least one spatial direction between the brush and the brush holder and the direction of displacement of the brush within the brush holder.
- the guide surfaces of the rails serve to guide the brush in the brush holder.
- the guide surfaces of different rails are preferably connected to one another in the brush holder by at least one wall section and flanks, so that a channel is formed between the guide surfaces of different rails.
- the wall sections of the brush holder are spaced further apart from the brush in the spatial direction in which there is play between the brush and the brush holder than the guide surfaces of the rails from the brush.
- This shape of the brush holder has the advantage that manufacturing tolerances only play a certain role in the area of the guide surfaces of the rails.
- the wall sections can be worked with relatively high manufacturing tolerances.
- the spaced-apart wall sections also have the advantage that dirt particles, which arise, for example, from abrasion of the brush and get between the brush and the brush holder, do not lead to the brush getting stuck in the brush holder. About each of The dirt particles can also escape from a wall section and channels bounded by the flanks.
- the rails are preferably U-shaped in cross-section, each with a base and the legs forming the two guide surfaces.
- the guide surfaces of the rails and the at least one wall section of the brush holder are preferably designed in the form of strips. This can be easily achieved in terms of production technology.
- the brush holder is preferably designed as a brush sleeve. This means that the brush holder has a circumferentially closed shape. This is easy to manufacture. In addition, the sleeve shape enables the brush to be held and guided optimally within the brush holder. In addition, the brush is by the brush sleeve in operation of the electric motor in front of external, e.g. protected against mechanical influences.
- the brush holder is designed such that a first side wall and a third side wall of the brush holder are each formed by one of the bases of the rails.
- a second side wall and a fourth side wall of the brush holder are preferably each formed by two guide surfaces of different rails and by the groove located between the two guide surfaces.
- the first and third side walls of the brush holder preferably have a smaller area than the second and fourth side walls of the brush holder.
- the brush holder is preferably deformed using a tool which has an essentially linear contact contour.
- a contour is essentially linear if it has a striking longitudinal extension compared to its transverse extension.
- a linear contact contour has the advantage that a deformation of the brush holder is easier to implement in terms of production technology than, for example, with an essentially flat contact contour, in which distortion and the resulting stresses play a major role.
- the contact contour of the tool preferably extends in the direction of displacement of the brush within the brush holder. It is thereby achieved that the minimal play achievable with the method extends between the brush and the brush holder in the direction of displacement of the brush within the brush holder. The brush can thus be easily adjusted within the brush holder.
- the tool is a punch and a die, which are arranged opposite one another, the punch and / or the die having the contact contour.
- the contact contour is preferably formed by two straight webs.
- a device for producing a brush arrangement with a brush and a brush holder is also provided.
- the brush arrangement is intended for a dynamo-electric machine, in particular an electric motor with a commutator.
- the device has a stamp and a die for deforming the brush holder, the stamp and the die being arranged so as to be pivotable relative to one another. It is possible that either the punch or the die is pivotally mounted on the device. It is preferably the stamp that is pivotally mounted on the device.
- the device according to the invention has the advantage that a variation of the relevant dimensions of the brush holder that may result from the manufacture of the brush holder can be compensated for. This is done by the swiveling stamp approaching the contour of the brush holder and following it. The brush holder can thus be deformed evenly. This also allows manufacturing tolerances in the manufacture of the brush to be compensated for.
- the stamp is mounted on the device via a ball joint.
- the device can have a guide device that causes the die and the punch to parallel in the unloaded state are opposite.
- the guide device is preferably a spring.
- FIG. 1 shows a perspective view of an embodiment of the device 1 according to the invention
- FIG. 2 shows a cross-sectional illustration of the device 1 according to FIG. 1;
- FIG. 3 shows an embodiment of the method according to the invention showing the process flow in steps a) to d)
- Fig. 3a in a perspective view of the assembly of the brush holder
- FIG. 3b shows a perspective view of the brush holder 10 inserted into the device 1 according to FIG. 1 with the brush 20;
- 3c shows the deformation of the brush holder 10 in a cross-sectional illustration
- FIG. 4 is a perspective view of the brush assembly 30
- FIG. 1 and 2 show a possible embodiment of a device 1 according to the present invention.
- 1 shows the device 1 in a perspective view
- FIG. 2 shows a cross section through the device 1.
- the device 1 has a stamp 2 and a die 3.
- the die 3 is spatially fixed on the device 1, whereas the punch 2 can be moved vertically, ie up and down in the y-direction in the direction of the arrows shown, a force being exerted on a workpiece to be machined between the punch 2 and the die 3 can be applied.
- the stamp 2 and the die 3 are arranged pivotably relative to one another. This is achieved by the stamp 2 being mounted on the device 1 via a ball joint 4. More specifically, the stamp 2 is mounted on a jaw 5 of the device 1 via the ball joint 4.
- the stamp 2 can be pivoted about the x-axis and z-axis, which is to be represented by the arrow representations on the stamp 2.
- the device 1 has a Guide device 6 in the form of a spring 6, which causes the die 3 and the punch 2 to lie parallel opposite one another in the unloaded state.
- the punch 2 and the die 3 have an essentially linear contact contour 7 in the form of two straight webs 7, which extend along the entire length of the punch 2 and the die 3, which extends in the z-spatial direction, and each extend at the lateral ends of the stamp 2 and the die 3 are. This gives the punch 2 and the die 3, viewed in cross section, a U-shaped shape.
- the webs 7 are formed in one piece with the stamp 2 and the die 3. The mode of operation of the device 1 is explained in more detail below with reference to FIG. 3.
- 3a to 3d show a possible embodiment of the method according to the invention.
- the process sequence is shown.
- the method is carried out with the device according to FIGS. 1 and 2.
- the brush holder 10 has an approximately cuboid shape. It comprises two rails 11 which face one another.
- the rails 11 are U-shaped in cross section. They each comprise a base 13 or 15 and two guide surfaces 18.
- the guide surfaces 18 of a rail 11 each face one another and lie parallel opposite one another.
- the bases 13 and 15 of the two rails 11 are also arranged parallel to one another.
- the guide surfaces 18 of different rails 11 are each connected to one another by a wall section 12 and two flanks 17 in such a way that a channel 19 is formed between these guide surfaces 11, which comprises the wall section 12 and the two flanks 17.
- the wall sections 12 are positioned further out than the guide surfaces 18.
- the guide surfaces 18 and the wall sections 12 are strip-shaped, specifically in the z-spatial direction.
- the brush holder 10 comprises four side walls.
- a first side wall 13 and a third side wall 15, which lie opposite one another, are formed by the bases 13 and 15 of the rails 11, respectively.
- a second side wall 14 and a fourth side wall 16 of the brush holder 10 are each formed by two guide surfaces 18 of the rails 11 and by the channel 19 connecting the two guide surfaces 18.
- the second side wall 14 and the fourth side wall 16 of the "brush holder 10 oppose each other.
- the first side wall 13 and the third side wall 15 have a smaller Surface on than the second side wall 14 and the fourth side wall 16.
- the brush holder has an inner width b in the y-spatial direction. This corresponds to the distance between the guide surfaces 18 within the rails 11.
- the brush holder 10 is made from a rectangular sheet metal strip by forming a plurality of kinks therein, which respectively delimit the side walls 13, 15, guide surfaces 18, flanks 17 and wall sections 12, and then the two short edges of the sheet metal strip, e.g. by crimping or soldering to close the strip into a sleeve.
- the brush holder 10 is therefore also referred to as a brush sleeve 10 or brush holder 10.
- a brush 20 is shown in the central drawing. It has a cuboid shape and is made of coal. It is manufactured by separating individual brush carbons 20 of the desired size from a large block of coal.
- the brush 20 has a width a.
- FIG. 3a shows the brush holder 10 and the brush 20 in this assembled state.
- the guide surfaces 18 of the rails 11 of the brush holder 10 thus define the play S existing in the y-spatial direction between the brush 20 and the brush holder 10.
- the rails 11 also define the direction of displacement (z direction) of the brush 20 within the brush holder 10.
- the device 1 comprises all the devices shown in FIGS. 1 and 2.
- FIG. 3b shows a perspective view of the brush holder 10 inserted into the device 1 with the brush 20.
- the brush holder 10 is inserted into the die 3 takes place in such a way that the webs 7 of the die 3 engage the guide surfaces 18 of the brush holder 10 directly to the right and left of the flanks 17. It is noted that it is also possible to first insert the brush holder 20 into the device 1 and then to assemble the brush 20 in the brush holder 10.
- the movable die 2 and the fixed die 3 serve as tools for deforming the brush holder 10.
- the die 2 and the die 3 are arranged opposite one another and in the illustrated, unloaded state they lie opposite each other in parallel.
- the punch 2 and the die 3 have, as already explained above with reference to FIGS.
- the webs 7 of the stamp 2 and the die 3 are adapted in their shape and dimensions to the shape and dimensions of the brush holder 20.
- the webs 7 are arranged parallel to one another and extend in the direction of displacement (z-direction) of the brush 20 in the brush holder 10.
- the webs 7 of the stamp 2 and the die 3 have a height h.
- the channel 19 has a height r, the height h of the webs 7 always being greater than the height r of the channel 19. This also applies during the deformation of the brush holder 10, in which the height r of the channel 19 can change.
- the spacing of the webs 7 in the x-spatial direction is designed such that between the webs 7 the channel 19 together with the flanks 17 can be received.
- the webs 7 extend in the z-spatial direction at least over the entire longitudinal extent of the brush holder 10 in the z-spatial direction.
- the stamp 2 moves downward in the y-spatial direction; compare Figures 3b and 3c.
- the plunger 2 moves down, the webs 7 of the plunger 2 act directly on the right and left of the flanks 17 on the guide surfaces 18 of the brush holder 10.
- variations in the width b of the brush holder 10 in the x or z spatial direction can occur within the scope of customary manufacturing tolerances. This is not a problem, however, since the stamp 2 can be pivoted about the x and z spatial axes; see arrow representation in Fig. 3b on the stamp 2. This pivotability results from the pivotable mounting of the stamp 2. the device 1, as described for FIGS.
- the stamp 2 Due to the pivotability of the stamp 2, the stamp 2 can approach the contours of the brush holder 10, so that the Brush holder 10 can be deformed evenly with the aforementioned dimensional fluctuations. A force is applied to the brush holder 10 with the stamp 2, as a result of which the brush holder 10 deforms.
- the deformation takes place partly elastically and partly plastically, locally on the second side wall 14 and the fourth side wall 16 of the brush holder 10.
- the plunger 2 of the device 1 is brought upwards again in its y-spatial direction into its starting position; see Fig. 3d. Because the deformation of the brush holder 10 was partially elastic, the brush holder 10 springs back a little bit into its original shape before the deformation. This again results in a play M in the y-spatial direction between the brush 20 and the brush holder 10. However, this is smaller than the original play S before the brush holder 10 is deformed.
- FIG. 4 finally shows a perspective view of a brush arrangement 30 manufactured according to FIG. 3 with the brush holder 10 and the brush 20, between which there is play M in the y-spatial direction.
- the ratio of plastic to elastic deformation can be set by the choice of the cross section, the material and the wall thickness of the brush holder 10.
- the remaining play M between the brush holder 10 and the brush 20 can be adjusted by the selection of these properties and dimensions.
Landscapes
- Motor Or Generator Current Collectors (AREA)
- Manufacture Of Motors, Generators (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Brushes (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10248992A DE10248992A1 (de) | 2002-10-21 | 2002-10-21 | Verfahren und Vorrichtung zur Herstellung einer Bürstenanordnung |
| DE10248992 | 2002-10-21 | ||
| PCT/EP2003/011654 WO2004038749A1 (de) | 2002-10-21 | 2003-10-21 | Verfahren und vorrichtung zur herstellung einer bürstenanordnung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1556875A1 true EP1556875A1 (de) | 2005-07-27 |
| EP1556875B1 EP1556875B1 (de) | 2006-08-23 |
Family
ID=32049511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03772242A Expired - Lifetime EP1556875B1 (de) | 2002-10-21 | 2003-10-21 | Verfahren und vorrichtung zur herstellung einer bürstenanordnung |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1556875B1 (de) |
| CN (1) | CN1320575C (de) |
| AT (1) | ATE337610T1 (de) |
| AU (1) | AU2003279304A1 (de) |
| DE (2) | DE10248992A1 (de) |
| ES (1) | ES2270118T3 (de) |
| WO (1) | WO2004038749A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103481035B (zh) * | 2013-09-24 | 2015-09-23 | 北京兴华机械厂 | 一种导电滑环弹性片状电刷的加工成型方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TR28171A (tr) * | 1993-09-15 | 1996-02-29 | Siemens Ag | Az gürültülü komütatör motor tahriki icin kullanilabilen firca destegi. |
| CN1074595C (zh) * | 1996-08-30 | 2001-11-07 | 东京零件工业股份有限公司 | 小型直流电机的电刷装置及其制造方法 |
| DE10054537A1 (de) * | 2000-11-03 | 2002-06-06 | Hoffmann & Co Elektrokohle Ag | Bürstenanordnung für Elektromotoren |
-
2002
- 2002-10-21 DE DE10248992A patent/DE10248992A1/de not_active Withdrawn
-
2003
- 2003-10-21 WO PCT/EP2003/011654 patent/WO2004038749A1/de not_active Ceased
- 2003-10-21 AT AT03772242T patent/ATE337610T1/de not_active IP Right Cessation
- 2003-10-21 DE DE50304785T patent/DE50304785D1/de not_active Expired - Fee Related
- 2003-10-21 AU AU2003279304A patent/AU2003279304A1/en not_active Abandoned
- 2003-10-21 EP EP03772242A patent/EP1556875B1/de not_active Expired - Lifetime
- 2003-10-21 ES ES03772242T patent/ES2270118T3/es not_active Expired - Lifetime
- 2003-10-21 CN CNB2003801018125A patent/CN1320575C/zh not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004038749A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2004038749A1 (de) | 2004-05-06 |
| ATE337610T1 (de) | 2006-09-15 |
| CN1320575C (zh) | 2007-06-06 |
| ES2270118T3 (es) | 2007-04-01 |
| DE50304785D1 (de) | 2006-10-05 |
| EP1556875B1 (de) | 2006-08-23 |
| AU2003279304A1 (en) | 2004-05-13 |
| DE10248992A1 (de) | 2004-04-29 |
| CN1706017A (zh) | 2005-12-07 |
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