Claims
- 1. A starter with a planetary gear speed reduction mechanism, comprising:
- a starter motor including an armature shaft for rotatably holding an armature core wound with an armature coil, a commutator connected with said armature coil and arranged generally in parallel with an end portion of said armature core, a brush slidably held on said commutator, and a fixed magnetic field device arranged on an outer circumference of said armature core; and
- a planetary gear speed reduction mechanism including a sun gear formed on an outer circumference of said armature shaft of said starter motor, a planetary gear supported at one end of a drive shaft arranged coaxially with said armature shaft and meshing with said sun gear, and an internal gear meshing with said planetary gear,
- wherein said fixed magnetic field device of said starter motor has its end portion overlapping at least one of said planetary gear speed reduction mechanism and said brush.
- 2. A starter with a planetary gear speed reduction mechanism according to claim 1, wherein:
- said armature coil includes an upper-layer and lower-layer armature coils arranged in a slot of said armature core;
- each of said upper-layer and lower-layer armature coils has a coil bar arranged in said slot, and a coil end arranged at one end of said coil bar in generally parallel with an end face of said armature core;
- said coil end of said upper-layer coil bar is electrically connected to said coil end of said lower-layer coil bar spaced away by a predetermined pitch; and
- said coil end of said upper-layer coil bar is used as said commutator.
- 3. A starter with a planetary gear speed reduction mechanism according to claim 1, wherein:
- said armature coil includes an upper-layer and lower-layer armature coils arranged in a slot of said armature core;
- each of said upper-layer and lower-layer armature coils has a coil bar arranged in said slot, and a pair of coil ends arranged at both ends of said coil bar in generally parallel with end faces of said armature core;
- said coil ends of said upper-layer coil bar are electrically connected to corresponding coil ends of said lower-layer coil bar spaced away by a predetermined pitch; and
- one of said coil ends of said upper-layer coil bar is used as said commutator.
- 4. A starter with a planetary gear speed reduction mechanism according to any one of claims 1 through 3, further comprising:
- a magnet switch for supplying an electric power to said starter motor, said magnet switch being arranged at a brush side of said starter motor and generally perpendicularly to an axial direction of said armature shaft.
- 5. A starter with a planetary gear speed reduction mechanism, comprising:
- a starter motor including an armature shaft for rotatably holding an armature core wound with an armature coil, a commutator connected with said armature coil and arranged generally in parallel with an end portion of said armature core, a brush slidably held on said commutator, a cylindrical yoke arranged around an outer circumference of said armature core to form a magnetic circuit, and a fixed magnetic field device arranged on an inner circumference of said yoke;
- a planetary gear speed reduction mechanism including a sun gear formed on an outer circumference of said armature shaft of said starter motor, a planetary gear supported at one end of a drive shaft arranged coaxially with said armature shaft and meshing with said sun gear, and an internal gear meshing with said planetary gear; and
- a motor partition wall made of a magnetic material, contacting said yoke and arranged adjacent to an end face of said fixed magnetic field device to form said magnetic circuit,
- wherein said fixed magnetic field device of said starter motor has its end portion overlapping at least one of said planetary gear speed reduction mechanism and said brush.
- 6. A starter with a planetary gear speed reduction mechanism according to claim 5, wherein:
- said motor partition wall is formed by at least one of a motor partition wall which separates said planetary gear speed reduction mechanism and said starter motor and a brush holder which holds said brush.
Parent Case Info
This is a continuation of International Application. No. PCT/JP95/02409, filed Nov. 24, 1995, which designated the U.S. and which was a continuation in part of International Application No. PCT/JP94/01987, filed Nov. 24, 1994.
US Referenced Citations (3)
Foreign Referenced Citations (4)
Number |
Date |
Country |
60-175763 |
Sep 1985 |
JPX |
62-35119 |
Feb 1987 |
JPX |
63-31263 |
Feb 1988 |
JPX |
5-141332 |
Jun 1993 |
JPX |