Starter with epicycle reduction gear

The starter with an epicycle reduction gear comprising:

• a starter motor having an armature shaft with a sun gear provided on an outer periphery thereof;
• a drive shaft including a large-diameter part pivotally supporting planetary gears meshing with said sun gear and disposed coaxially with said armature shaft;
• an internal gear including a large-diameter cylindrical part with an annular face formed on an inner periphery thereof for meshing with said planetary gears;
• a casing encompassing said sun gear, said planetary gears and said internal gear;
• and
• a one-way clutch disposed between said internal gear and an inner periphery of said casing in a position proximate said internal gear and inside said casing;
• and smaller in diameter than an outer periphery of said large-diameter cylindrical part of said internal gear,
• wherein said casing comprises:
• a large-diameter cylindrical part and an end-wall part, both of which include a cylinder with a bottom encompassing said internal gear;
• and
• a small-diameter cylindrical part provided extending from a central part of said end-wall part to said internal gear and disposed coaxially with said large-diameter cylindrical part and including a clutch inner member of said one-way clutch;
• wherein said internal gear comprises a small-diameter cylindrical part encompassing the outer periphery of said small-diameter cylindrical part of said casing and including a clutch outer member of said one-way clutch;
• and
• wherein said large-diameter cylindrical part includes said annular face and is formed to be larger in diameter than said small-diameter cylindrical part.

A starter for an internal combustion engine comprising:

• a casing;
• a starter motor attached to said casing;
• a sun gear connected to said starter motor and disposed in said casing;
• a plurality of planetary gears meshing with said sun gear and disposed in said casing;
• means for supporting said planetary gears;
• an internal gear having a large-diameter cylindrical part, said internal gear meshing with said planetary gears and being disposed in said casing;
• a one-way clutch disposed between said internal gear and said casing proximate said internal gear, a clutch outer member being formed by a portion of said internal gear and being outside a clutch inner member formed by a portion of said casing, said one-way clutch being disposed in a position having a diameter smaller than an outer diameter of said large-diameter cylindrical part of said internal gear.

A starter for an internal combustion engine comprising:

• a casing;
• an epicycle reduction gear housed in said casing and including an internal gear;
• and
• a one-way clutch completely disposed in said casing;
• wherein said epicycle reduction gear includes a plurality of planetary gears;
• wherein said internal gear includes a large-diameter cylindrical part;
• wherein a clutch outer member is formed by a portion of said internal gear and is outside a clutch inner member formed by a portion of said casing;
• and
• wherein said one-way clutch is formed to have a diameter smaller than an outer diameter of said large-diameter cylindrical part of said internal gear.

A starter for an internal combustion engine comprising:

• a casing;
• an epicycle reduction gear housed in said casing and including an internal gear;
• and
• a one-way clutch completely disposed in said casing;
• wherein said epicycle reduction gear includes a plurality of planetary gears;
• wherein said internal gear includes a large-diameter cylindrical part;
• and
• wherein said one-way clutch is formed to have a diameter smaller than an outer diameter of said large-diameter cylindrical part of said internal gear;
• wherein said casing comprises:
• a large-diameter cylindrical part and an end-wall part, which together form a cylinder having a bottom encompassing said internal gear;
• and
• a small-diameter cylindrical part extending from a central part of said end-wall part towards said internal gear and formed coaxially with said large diameter part of said casing, said small-diameter cylindrical part including a clutch inner member;
• and
• wherein said internal gear includes:
• a small-diameter cylindrical part encompassing an outer periphery of said small-diameter part of said casing and forming a clutch outer member;
• and
• a large-diameter cylindrical part having interior teeth and having a diameter greater than that of said small-diameter cylindrical part.

A starter for an internal combustion engine, comprising:

• a casing having a small-diameter part;
• means for enclosing a sun gear, planetary gears, a one-way clutch and an internal gear of said starter;
• wherein said one-way clutch is disposed between said internal gear and an inner periphery of said casing;
• wherein said one-way clutch is disposed at a position next to said internal gear, and said clutch is smaller in diameter than an outer periphery of a large-diameter cylindrical part of said internal gear;
• wherein said internal gear includes a small-diameter cylindrical part encompassing an outer periphery of said small-diameter cylindrical part of the casing and serving as a clutch outer member of said one-way clutch;
• wherein a large-diameter cylindrical part of said internal gear includes interior teeth and is formed to be larger in diameter than the small-diameter cylindrical part;
• and wherein said casing prevents contaminants from entering thereinto.