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
  • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
  • H01R43/06—Manufacture of commutators

Definitions

• the invention is based on a commutator for electrical machines according to the preamble of the main claim.
• the carrier body consists of steel and has a cylindrical outer jacket on which an insulating cylinder is attached. Segments and insulating rods are alternately arranged on the insulating cylinder to form an equally cylindrical outer jacket - and thus the brush running surface of the commutator - and connected to one another by soldering or welding.
• the disadvantage here is that the manufacturing process is very cumbersome and expensive and can not be sufficiently centrifugal and temperature resistant.
• the invention is based on the object of producing a commutator suitable for large-scale production for high-speed electrical machines in short process times with high spin resistance and high temperature resistance.
• the measures specified in the characterizing part of the main claim are provided to achieve the object.
• the advantage here is that the elimination of asbestos-containing insulating material and the associated long manufacturing process time means that more environmentally friendly commutators with sufficiently high spin resistance can be produced in a process suitable for large-scale production with short cycle times, and moreover assembly of the commutators in an automated armature production junction road is made possible. It is also advantageous that a higher temperature resistance and better heat dissipation is achieved by the elimination of the usual known insulating material, which mostly contains asbestos, and there is no need to remove the insulation between the segments.
• FIG. 1 shows a commutator in longitudinal section
• FIG. 2 shows a first exemplary embodiment
• FIG. 3 shows a second exemplary embodiment of a part of the segment carrier with segments inserted and fastened in the longitudinal grooves, each in the direction of the arrow in FIG. 1.
• a commutator has a segment carrier 1, for example made of steel or aluminum, which is provided with a concentric bore 2 2 for receiving it on an armature shaft which is known per se and not shown in detail.
• the segment carrier 1 On its outer jacket 3, the segment carrier 1 is provided with longitudinal grooves 4 evenly distributed in the U direction of travel.
• an insulating layer 5 is applied, for example made of paper, lacquer or as a powder coating.
• the side walls 6 of the open longitudinal grooves 4 are flat.
• the segments 7 have at one end a connecting lug 8 for fastening the ends of an armature winding which is known per se and not shown in detail.
• the fastening area 9 of the segments 7 in the longitudinal grooves 4 of the segment carrier 1 is narrowed in cross section in a wedge shape with a rounded edge.
• the shape of the fastening area 9 of the segments 7 thus corresponds to the shape of the longitudinal groove 4 of the segment carrier 1.
• a longitudinal groove 11 is formed in each of the longitudinal sides 10 of the fastening area 9, which forms an undercut as seen from the brush tread 12 of the segments 7.
• the segments 7 with their fastening areas 9 to 11 are inserted radially or axially into the longitudinal grooves 4 of the segment carrier 1 and mechanically fastened in the segment carrier 1. This is done, for example, by caulking. Material is pressed at least in places from the outer jacket 3 between the longitudinal grooves 4 of the segment carrier 1 into the longitudinal grooves 11 in the fastening area 9 of the segments 7.
• the segments 7 can also be caulked from "inside". For this purpose, for example, the commutator is clamped into a die and the segment carrier 1 equipped with the segments 7 is axially collapsed. presses, so that displaced material of the segment carrier 1 can dodge into the longitudinal grooves 11 of the segments 7 and holds the segments 7 in the segment carrier 1.
• the edge sections 14 of the side walls 15 are formed so as to protrude into the longitudinal grooves 15 at the open end of the longitudinal grooves 16 of the segment carrier 13.
• the edge sections 14 are formed corresponding to the longitudinal grooves 11 in the fastening area 9 of the segments 7 and also form undercuts when viewed from the outer jacket 3 of the segment carrier 13.
• the segments 7 are inserted with their fastening area 9 axially into the longitudinal grooves 16 of the segment carrier 13, the edge sections 14 engaging in the longitudinal grooves 11 of the segments 7.
• the segments 7 are already held on the segment carrier 13.
• the segments 7 are additionally fastened to the segment carrier 13, for example by caulking.
• the segments 7 can be caulked from "inside" as in the first embodiment. Above all, this increases the skid resistance.
• the assembly of the commutators can be carried out with simple means in short cycle times in an automated armature production line in both versions and is therefore carried out economically, particularly in large-volume production.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Motor Or Generator Current Collectors (AREA)
• Manufacture Of Motors, Generators (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6369427

Family Applications (1)

Country Status (7)

Families Citing this family (5)

Family Cites Families (2)

• 1988
  • 1988-12-17 DE DE19883842564 patent/DE3842564A1/de not_active Withdrawn
• 1989
  • 1989-11-16 JP JP51134789A patent/JPH04503748A/ja active Pending
  • 1989-11-16 AU AU44966/89A patent/AU620469B2/en not_active Ceased
  • 1989-11-16 EP EP19890912225 patent/EP0448564A1/de not_active Withdrawn
  • 1989-11-16 BR BR898907827A patent/BR8907827A/pt unknown
  • 1989-11-16 WO PCT/DE1989/000715 patent/WO1990007210A1/de not_active Application Discontinuation
  • 1989-12-15 ES ES8904236A patent/ES2017893A6/es not_active Expired - Lifetime

Non-Patent Citations (1)

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