| 摘要 |
#CMT# #/CMT# The commutator (1) has an insulating reinforcing ring (10) arranged around electrically conducting segments (3) in metal i.e. copper. A reinforcing ring (11) is made of a material e.g. steel, different from a material e.g. glass fiber, of the ring (10) and arranged against the ring (10). The ring (11) has a T-shaped with a longitudinal branch (20) parallely extending to a longitudinal axis of the commutator. A transverse branch (21) extends perpendicular to the branch (20), which has an axial dimension (h), measured along the axis, higher than an axial dimension (l) of the branch (21). #CMT#USE : #/CMT# Flat commutator for a rotating electric machine i.e. starter, (claimed) of a combustion engine of a motor vehicle. #CMT#ADVANTAGE : #/CMT# The arrangement of the reinforcing rings around the conducting segments limits lifting and deformation of the conducting segments, thus improving behavior of the commutator to centrifugation particularly in high temperature ranges, and extending the service life of the commutator. The insulating reinforcing ring permits correct and easy centering of another reinforcing ring, thus simplifying the manufacturing of the commutator. The axial dimension of the longitudinal branch is higher than axial dimension of transverse branch, thus improving rigidity of the insulating reinforcing ring. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic partial longitudinal sectional view of a commutator for a rotating electric machine. h, l : Axial dimensions 1 : Flat commutator 3 : Electrically conducting segments 10 : Insulating reinforcing ring 11 : Reinforcing ring 20 : Longitudinal branch 21 : Transverse branch. |
