Electric rotating machine

An electric rotating machine comprising:

• an armature core including slots;
• a shaft rotatably supporting said armature core;
• upper coil trunks and lower coil trunks housed within said slots of said armature core;
• lower coil arms electrically connected at one end part thereof to one end part of said lower coil trunks and disposed substantially perpendicularly to said shaft, said lower coil arms extending towards said shaft;
• upper coil arms electrically connected at one end part thereof to one end part of said upper coil trunks and disposed substantially perpendicularly to said shaft, said upper coil arms extending towards said shaft and connected at a second end part thereof to a second end part of said lower coil arms;
• said lower coil arms having axially protruding portions extending along said shaft at radially inner end parts thereof to electrically connect said lower coil arms to radially inner end parts of said upper coil arms, respectively;
• and
• collar means pressing said upper coil arms against a side of an axial end face of said armature core to prevent radial displacement of said upper coil arms towards an outer periphery of said armature core.

An electric rotating machine comprising:

• an armature core including slots;
• a shaft rotatably supporting said armature core;
• upper coil trunks and lower coil trunks housed within said slots of said armature core;
• lower coil arms electrically connected at one end part thereof to one end part of said lower coil trunks and disposed substantially perpendicularly to said shaft, said lower coil arms extending towards said shaft;
• upper coil arms electrically connected at one end part thereof to one end part of said upper coil trunks and disposed substantially perpendicularly to said shaft, said upper coil arms extending towards said shaft and connected at a second end part thereof to a second end part of said lower coil arms;
• a metal brush means disposed on said upper coil arms;
• a circumferential width of said upper coil arms on which said brush means is disposed being circumferentially widened in radial direction towards an outer periphery of said armature core;
• clearance grooves being formed by adjacent two said upper coil arms, said clearance grooves being formed in a one of a substantially spiral and a substantially radial shape extending in a direction opposite to a rotational direction of said armature core from a radially inner periphery to a radially outer periphery for providing an air flow path;
• a depth of said clearance grooves roughly matching a thickness of said upper coil arms.

An electric rotating machine comprising:

• an armature core including slots;
• a shaft rotatably supporting said armature core;
• upper coil trunks and lower coil trunks housed within said slots of said armature core;
• lower coil arms electrically connected at one end part thereof to one end part of said lower coil trunks and disposed substantially perpendicularly to said shaft, said lower coil arms extending towards said shaft;
• upper coil arms electrically connected at one end part thereof to one end part of said upper coil trunks and disposed substantially perpendicularly to said shaft, said upper coil arms extending towards said shaft and connected at a second end part thereof to a second end part of said lower coil arms;
• insulators disposed between said lower coil arms and said armature core and between said upper coil arms and said lower coil arms, respectively;
• said insulator disposed between said lower coil arms and said upper coil arms being provided with positioning parts for regulating circumferential and radial relative displacement between upper coil arms and said lower coil arms, said positioning parts comprising holes provided in said insulator for receiving therein protrusion portions formed on said upper coil arms.

An electric rotating machine comprising:

• an armature core including slots;
• a shaft rotatably supporting said armature core;
• upper coil trunks and lower coil trunks housed within said slots of said armature core;
• lower coil arms electrically connected at one end part thereof to one end part of said lower coil trunks and disposed substantially perpendicularly to said shaft, said lower coil arms extending towards said shaft;
• upper coil arms electrically connected at one end part thereof to one end part of said upper coil trunks and disposed substantially perpendicularly to said shaft, said upper coil arms extending towards said shaft and connected at a second end part thereof to a second end part of said lower coil arms;
• insulators disposed between said lower coil arms and said armature core and between said upper coil arms and said lower coil arms, respectively;
• said lower coil arms having axial protrusion parts extending towards radial end parts thereof, and wherein radially inner end parts of said insulators are inserted between said axial protrusion parts and are circumferentially adjacent to each other and have axially inner recessed parts recessed for positioning.

An electric rotating machine comprising:

• an armature core including slots:
• a shaft rotatably supporting said armature core;
• upper coil trunks and lower coil trunks housed within said slots of said armature core;
• first lower coil arms and second lower coil arms extending from first ends and second ends of said lower coil trunks, respectively, substantially perpendicularly towards said shaft, each of said first lower coil arms, said second lower coil arms and said lower coil trunks being formed integrally from a single coil;
• first upper coil arms and second upper coil arms extending from first ends and second ends of said upper coil trunks, respectively, substantially perpendicularly towards said shaft, each of said first upper coil arms, said second upper coil arms and said upper coil trunks being formed integrally from a single coil;
• and
• brushes disposed on said first upper coil arms,
• wherein radial inner ends of said first upper coil arms and said second upper coil arms are electrically connected to radial inner ends of said first lower coil arms and said second lower coil arms, respectively, adjacent said shaft.

An electric rotating machine comprising:

• an armature core including slots;
• a shaft rotatably supporting said armature core;
• upper coil trunks and lower coil trunks housed within said slots of said armature core;
• lower coil arms electrically connected at one end part thereof to one end part of said lower coil trunks and disposed substantially perpendicularly to said shaft, said lower coil arms extending towards said shaft;
• upper coil arms electrically connected at one end part thereof to one end part of said upper coil trunks and disposed substantially perpendicularly to said shaft, said upper coil arms extending towards said shaft and connected at a second end part thereof to a second end part of said lower coil arms;
• and
• collars pressing said upper coil arms against a side of an axial end face of said armature core to prevent radial displacement of said upper coil arms towards an outer periphery of said armature core.

An electric rotating machine comprising:

• an armature core including slots;
• a shaft rotatably supporting said armature core;
• upper coil trunks and lower coil trunks housed within said slots of said armature core;
• lower coil arms electrically connected at one end part thereof to one end part of said lower coil trunks and disposed substantially perpendicularly to said shaft, said lower coil arms extending towards said shaft;
• upper coil arms electrically connected at one end part thereof to one end part of said upper coil trunks and disposed substantially perpendicularly to said shaft, said upper coil arms extending towards said shaft and connected at a second end part thereof to a second end part of said lower coil arms;
• insulators disposed between said lower coil arms and said armature core and between said upper coil arms and said lower coil arms, respectively;
• said insulator disposed between said lower coil arms and said coil arms being provided with positioning parts for regulating circumferential and radial relative displacement between upper coil arms and said lower coil arms, said positioning parts comprising one of holes and protrusion portions provided on said insulator and said upper coil arms has one of protrusion portions and holes provided thereon for engagement with said positioning parts of said insulator.