Claims
- 1. In a starter motor having a housing with an opening therein, a motor with an output drive shaft, said output drive shaft having an end proximal to and driven by said motor and a distal end extending through said housing opening, and a mechanical stop ring on said output drive shaft distal end, a pinion drive gear supported by a pinion driving shaft, said pinion drive gear and said pinion driving shaft having a cylindrical bore with a first diameter therethrough so that said pinion gear drive gear and said pinion driving shaft are slidable over said output drive shaft towards said distal end, and an annular bearing mounted in said housing opening for supporting said pinion drive gear and said pinion driving shaft, said cylindrical bore having a section thereof facing said output drive shaft distal end and disposed concentric with and having a second diameter less than that of at least said pinion drive gear with said second diameter larger than said first diameter so that said larger second diameter bore section is slidable over said mechanical stop ring, said pinion drive gear being located about said larger second diameter bore section, said larger second diameter bore section constituting at least an inner diameter of said pinion drive gear, said first and second diameter bore sections defining therebetween a step portion against which the stop ring may be urged, said step portion formed longitudinally between said pinon drive gear and a portion of said pinion driving shaft, said pinion drive gear and said pinion driving shaft having alternate position including a withdrawn position in which said mechanical stop ring is positioned substantially within said larger second diameter bore section and said pinion drive gear is substantially withdrawn within said housing and does not substantially extend from said housing opening, and a projected position in which said pinion drive gear extends at least partially beyond said mechanical stop ring and extends in its entirety through and beyond said bracket opening, said pinion drive gear and said pinion driving shaft being translationally displaceable between the withdrawn position and the projected position.
- 2. A starter motor according to claim 1 further comprising:
- a sleeve metal member disposed between said output drive shaft and a portion of said pinion driving shaft other than said larger second diameter bore section;
- a first clearance between said sleeve metal member and said output drive shaft; and
- a second clearance between said mechanical stop ring and said larger second diameter bore section when said pinion gear and said pinion driving shaft are engaged with said mechanical stop ring.
- 3. A starter motor according to claim 1, wherein said output drive shaft has an outer peripheral surface, said starter motor further comprising an overrunning clutch and a helical spline which is formed in the outer peripheral surface of said output drive shaft, said overrunning clutch including a clutch outer member engaged with said helical spline, a clutch inner member having said pinion driving shaft formed integral therewith, and at least one roller interposed between said clutch inner and outer members.
- 4. A starter motor according to claim 1, wherein said pinion drive gear is formed integral with said pinion driving shaft.
- 5. A starter motor according to claim 4, wherein said output rotary shaft has an outer periphery, wherein a helical spline is formed on the outer periphery of said output rotary shaft, and wherein said starter motor further comprises an overrunning clutch axially slidably disposed about said output rotary shaft and comprising:
- a clutch outer member engaged with said helical spline;
- a clutch inner member integral with said pinion driving shaft; and
- at least one roller interposed between said clutch outer member and said clutch inner member.
- 6. A starter motor according to claim 4, further comprising an overrunning clutch axially slidably disposed about said output rotary shaft and comprising a clutch inner member integral with said pinion driving shaft.
- 7. In a starter motor according to claim 1 wherein said annular bearing has an outer race supported by said housing and an inner race supported by said pinion driving shaft at a position closely adjacent said pinion drive gear.
- 8. In a starter motor according to claim 1, wherein:
- said output drive shaft has an outer peripheral surface provided with an annular recess; and
- said mechanical stop ring comprises a ring fitted in said annular recess and a stopper member retained on said output drive shaft by said ring, said stopper member being configured to be slidable within said larger second diameter bore section.
- 9. In a starter motor having a housing with an opening therein, a motor with an output drive shaft, said output drive shaft having an end proximal to and driven by said motor and a distal end extending through said housing opening, and a mechanical stop ring on said output drive shaft distal end, a pinion drive gear supported by a pinion driving shaft, said pinion drive gear and said pinion driving shaft having a cylindrical bore with a first diameter therethrough so that said pinion drive gear and said pinion driving shaft are slidable over said output drive shaft towards said distal end, and an annular bearing mounted in said housing opening for supporting said pinion drive gear and said pinion driving shaft, said cylindrical bore having a section thereof facing said output drive shaft distal end disposed concentric with and having a second diameter less than that of at least said pinion drive gear with said second diameter larger than said first diameter so that said larger second diameter bore section is slidable over said mechanical stop ring, said first and second diameter bore sections defining therebetween a step portion against which the stop ring may be urged, said stop portion formed longitudinally between said pinion drive gear and a portion of said pinion driving shaft,
- a sleeve metal member disposed between said output drive shaft and a portion of said pinion driving shaft other than said larger second diameter bore section,
- a first clearance between said sleeve metal member and said output drive shaft, and
- a second clearance between said mechanical stop ring and said larger second diameter bore section when said pinion gear and said pinion driving shaft are engaged with said mechanical stop ring,
- wherein said first clearance between said output drive shaft and said sleeve metal member is set at from 30 to 150 .mu.m, whereas said second clearance between said mechanical stop ring and said larger second diameter bore section of said pinion drive gear and said pinion driving shaft is set at from 130 to 800 .mu.m.
- 10. A starter motor according to claim 9 wherein:
- said pinion drive gear is located about said larger second diameter bore section; and
- said larger second diameter bore section constitutes at least an inner diameter of said pinion drive gear.
- 11. In a starter motor having a housing with an opening therein, a motor with an output drive shaft, said output drive shaft having an end proximal to and driven by said motor and a distal end extending through said housing opening, and a mechanical stop ring on said output drive shaft distal end, a pinion drive gear supported by a pinion driving shaft, said pinion drive gear and said pinion driving shaft having a cylindrical bore with a first diameter therethrough so that said pinion drive gear and said pinion driving shaft are slidable over said output drive shaft towards said distal end, and an annular bearing mounted in said housing opening for supporting said pinion drive gear and said pinion driving shaft, said cylindrical bore having a section thereof facing said output drive shaft distal end disposed concentric with and having a second diameter less than that of at least said pinion drive gear with said second diameter larger than said first diameter so that said larger second diameter bore section is slidable over said mechanical stop ring, said first and second diameter bore sections defining therebetween a step portion against which the stop ring may be urged, said step portion formed longitudinally between said pinion drive gear and a portion of said pinion driving shaft,
- a sleeve metal member disposed between said output drive shaft and a portion of said pinion driving shaft other than said larger second diameter bore section,
- a first clearance between said sleeve metal member and said output drive shaft, and
- a second clearance between said mechanical stop ring and said larger second diameter bore section when said pinion gear and said pinion driving shaft are engaged with said mechanical stop ring,
- wherein said second clearance between said mechanical stop ring and said larger second diameter bore section of said pinion drive gear and said pinion driving shaft is larger than said first clearance between said output drive shaft and said sleeve metal member.
- 12. A starter motor according to claim 11 wherein:
- said pinion drive gear is located about said larger second diameter bore section; and
- said larger second diameter bore section constitutes at least an inner diameter of said pinion drive gear.
- 13. A starter motor, comprising;
- a bracket having a cylindrical opening therethrough;
- a motor;
- an output rotary drive shaft, said output drive shaft having an end proximal to and driven by said motor, and having a distal end extending through said bracket opening;
- a mechanical stop ring fixedly disposed on said output drive shaft substantially at said output drive shaft distal end;
- a pinion driving shaft having an outer periphery;
- a pinion forming an end termination of said pinion driving shaft distal from said motor, said pinion being integral with said pinion driving shaft, said pinion having an end distal from said pinion driving shaft;
- said pinion and said pinion driving shaft having a cylindrical bore with a first diameter therethrough so that said pinion and said pinion driving shaft are slidable axially of said output drive shaft, said output drive shaft being at least partially disposed in said cylindrical bore;
- said cylindrical bore having a section, at least partially disposed within said pinion, and extending within said pinion from said pinion distal end, with a diameter larger than said first diameter such that said larger diameter section is slidable over said mechanical stop ring;
- said pinion and said pinion driving shaft having alternate positions including a withdrawn position in which said mechanical stop ring is positioned substantially within said larger diameter section and said pinion is substantially withdrawn within said bracket and does not substantially extend axially from said cylindrical opening, and a projected position in which said pinion extends at least partially beyond said mechanical stop ring and extends axially through and beyond said bracket opening, said pinion and said pinion driving shaft being translationally displaceable between the withdrawn position and the projected position; and
- a step portion, formed between the different diameter sections of the cylindrical bore, against which the stop ring is urged in the projected position, said step portion being so positioned in said bore as to limit translational displacement of said pinion beyond said projected position when directed away from said withdrawn position.
- 14. A starter motor according to claim 13, wherein said output rotary shaft has an outer periphery, wherein a helical spline is formed on the outer periphery of said output rotary shaft, and wherein said starter motor further comprises an overrunning clutch axially slidably disposed about said output rotary shaft and comprising:
- a clutch outer member engaged with said helical spline;
- a clutch inner member integral with said pinion driving shaft; and
- at least one roller interposed between said clutch outer member and said clutch inner member.
- 15. A starter motor according to claim 13, further comprising an overrunning clutch axially slidably disposed about said output rotary shaft and comprising a clutch inner member integral with said pinion driving shaft.
- 16. A starter motor according to claim 13, further comprising:
- an annular bearing comprising inner and outer races, said outer race being fitted to said bracket adjacent said opening and said inner race being slidably disposed about said pinion driving shaft adjacent said pinion such that said pinion driving shaft is slidable axially of said output rotary shaft and rotatable with respect to said bracket.
- 17. A starter motor according to claim 16, wherein said output rotary shaft has an outer periphery and a helical spline is formed on the outer periphery of said output rotary shaft, and wherein said starter motor further comprises an overrunning clutch axially slidably disposed about said output rotary shaft and comprising:
- a clutch outer member engaged with said helical spline;
- a clutch inner member integral with said pinion driving shaft; and
- at least one roller interposed between said clutch outer member and said clutch inner member.
- 18. In a starter motor having a housing with an opening therein, a motor with an output drive shaft, said output drive shaft having an end proximal to and driven by said motor and a distal end extending through said housing opening, and a mechanical stop ring on said output drive shaft distal end, a pinion drive gear supported by a pinion driving shaft, said pinion drive gear and said pinion driving shaft having a cylindrical bore with a first diameter therethrough so that said pinion drive gear and said pinion driving shaft are slidable over said output drive shaft towards said distal end, said cylindrical bore having a section thereof facing said output drive shaft distal end and disposed concentric with and having a second diameter less than that of at least said pinion drive gear with said second diameter larger than said first diameter so that said larger second diameter bore section is slidable over said mechanical stop ring, said pinion drive gear being located about said larger second diameter bore section, said larger second diameter bore section constituting at least an inner diameter of said pinion drive gear,
- a sleeve metal member disposed between said output drive shaft and a portion of said pinion driving shaft other than said larger second diameter bore section;
- a first clearance between said sleeve metal member and said output drive shaft; and
- a second clearance between said mechanical stop ring and said larger second diameter bore section when said pinion gear and said pinion driving shaft are engaged with said mechanical stop ring,
- wherein said second clearance between said mechanical stop ring and said larger second diameter bore section of said pinion drive gear and said pinion driving shaft is larger than said first clearance between said output drive shaft and said sleeve metal member.
- 19. A starter motor according to claim 18, wherein said first clearance between said output drive shaft and said sleeve metal member is set at from 30 to 150 .mu.m, whereas said second clearance between said mechanical stop ring and said larger second diameter bore section of said pinion drive gear and said pinion driving shaft is set at from 130 to 800 .mu.m.
- 20. A starter motor, comprising:
- a bracket having a cylindrical opening therethrough;
- a motor;
- an output rotary drive shaft, said output drive shaft having an end proximal to and driven by said motor, and having a distal end extending through and beyond said bracket opening;
- a mechanical stop ring fixedly disposed on said output drive shaft substantially at said output drive shaft distal end;
- a pinion driving shaft having an outer periphery;
- a pinion forming an end terminator of said pinion driving shaft distal from said motor, said pinion being integral with said pinion driving shaft, said pinion having an end distal from said pinion driving shaft;
- said pinion and said pinion driving shaft having a cylindrical bore wtih a first diameter therethrough so that said pinion and said pinion driving shaft are slidable axially of said output drive shaft, said output drive shaft being at least partially disposed in said cylindrical bore;
- said cylindrical bore having a section, at least partially disposed within said pinion, and extending within said pinion from said pinion distal end, with a diameter larger than said first diameter such that said larger diameter section is slidable over said mechanical stop ring;
- said pinion and said pinion driving shaft having alternate positions including a withdrawn position in which said mechanical stop ring is positioned substantially within said larger diameter section, and a projected position in which at least part of said pinion axially extends substantially beyond said mechanical stop ring and through and beyond said bracket opening, said pinion and said pinion driving shaft being translationally displaceable between the withdrawn position and the projected position; and
- a step portion, formed between the different diameter sections of the cylindrical bore, against which the stop ring is urged in the projected position, said portion being so positioned in said bore within said pinion driving shaft as to limit translational displacement of said pinion beyond said projected position when directed away from said withdrawn position.
- 21. A starter motor according to claim 20, wherein said step portion is disposed within said bracket opening.
- 22. A starter motor according to claim 20, further comprising an annular bearing mounted in said bracket for rotatably supporting said pinion and said pinion driving shaft, wherein said step portion is disposed between said annular bearing and said mechanical stop ring.
- 23. A starter motor according to claim 20, wherein said step portion is disposed adjacent to, but proximal of, said pinion.
- 24. A starter motor according to claim 20, wherein said step portion is maintained within said bracket opening in both withdrawn and projected positions.
- 25. In a starter motor having a housing with an opening therein, a motor with an output drive shaft, said output drive shaft having an end proximal to and driven by said motor and a distal end extending through said housing opening, and a mechanical stop ring on said output drive shaft distal end, a pinion drive gear supported by a pinion driving shaft, said pinion drive gear and said pinion driving shaft having a cylindrical bore with a first diameter therethrough so that said pinion drive gear and said pinion driving shaft are slidable over said output drive shaft towards said distal end, and an annular bearing mounted in said housing opening for supporting said pinion drive gear and said pinion driving shaft, said cylindrical bore having a section thereof facing said output drive shaft distal end and disposed concentric with and having a second diameter less than that of at least said pinion drive gear with said second diameter larger than said first diameter so that said larger second diameter bore section is slidable over said mechanical stop ring, said pinion drive gear being located about said larger second diameter bore section, said larger second diameter bore section constituting at least an inner diameter of said pinion drive gear and of part of said pinion driving shaft, said first and second diameter bore sections defining therebetween a step portion against which the stop ring may be urged, said step portion formed longitudinally within said pinion driving shaft.
- 26. A starter motor according to claim 25, wherein said step portion is disposed within said housing opening.
- 27. A starter motor according to claim 25, wherein said step portion is disposed between said annular bearing and said mechanical stop ring.
- 28. A starter motor according to claim 25, wherein said step portion is disposed adjacent to, but proximal of, said pinion.
- 29. A starter motor according to claim 25, wherein said step portion is maintained within said bracket opening in both withdrawn and projected positions.
Priority Claims (2)
Number |
Date |
Country |
Kind |
62-37723[U] |
Mar 1987 |
JPX |
|
62-165631[U] |
Oct 1987 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 07/453,050, filed Dec. 13, 1989 now abandoned, which is a continuation of application Ser. No. 07/166,635, filed Mar. 11, 1988 now abandoned.
US Referenced Citations (12)
Foreign Referenced Citations (6)
Number |
Date |
Country |
115852 |
Aug 1984 |
EPX |
1191994 |
Apr 1965 |
DEX |
54-132032 |
Oct 1979 |
JPX |
54-138926 |
Oct 1979 |
JPX |
533839 |
Feb 1941 |
GBX |
2142094 |
Jan 1985 |
GBX |
Non-Patent Literature Citations (2)
Entry |
Japanese Patent Public Disclosure (Kokai) No. 98962/1986; 17 May 1986. |
Japanese Utility Model Publication (Kokoku) No. 3677/1986; 24 Oct. 1986. |
Continuations (2)
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Number |
Date |
Country |
Parent |
453050 |
Dec 1989 |
|
Parent |
166635 |
Mar 1988 |
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