Clutch and gear train utilizing same |
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| 申请号 | US33362073 | 申请日 | 1973-02-20 | 公开(公告)号 | US3845668A | 公开(公告)日 | 1974-11-05 |
| 申请人 | MALLORY & CO INC P R; | 发明人 | UNDERWOOD D; | ||||
| 摘要 | A series of plastic gears is coupled to a series of metal gears through a combination plastic gear and a metal gear carried on a common shaft. A gear train is carried in a housing on a support plate carried by the bottom of the housing. The clutch includes a first rotating member carrying a spring biased pivotly mounted pawl and a stop means engaging the pawl, the pawl also engaging a second rotating member carried about the first rotating member. | ||||||
| 权利要求 | 1. A gear train comprising: a. an input gear, b. an output, and c. coupling means coupling said input to said output comprising a series of gears including a series of plastic gears and a series of metal gears, and a plastic gear and a metal gear carried on a common shaft, said plastic gear engaging a gear of said series of plastic gears and said metal gear engaging a metal gear of said series of metal gears. 2. A gear train according to claim 1 wherein said series of gears comprise at least two gear and pinion combinations each combination carried oN a common shaft. 3. A gear train according to claim 1 wherein said metal gear is a pinion. 4. A gear train according to claim 1 wherein said coupling means further includes a clutch. 5. A gear train according to claim 4 wherein said clutch comprises: a. a shaft b. a pinion rotatably carried by said shaft and engaging a gear of said series of gears, c. a spring biased pawl pivotally carried by said pinion, and stop means carried by said pinion and adapted to engage said pawl when said pinion rotates in a predetermined direction, and d. a gear independently rotatably carried about said pinion and having internal teeth adapted to engage said pawl, said gear engaging another gear of said series of gears. 6. A gear train according to claim 5 wherein said stop means comprises a post carried by said pinion. 7. A gear train according to claim 5 wherein a leaf spring carried on said pinion biases said pawl. 8. A gear train according to claim 4 wherein said clutch comprises: a. a shaft b. a pinion carried by said shaft and engaging a gear of said series of gears c. a gear independently carried about said pinion and engaging a gear of said gear train and d. spring means connected to said pinion and frictionally engaging said gear. 9. A gear train according to claim 8 wherein said spring means comprises a pair of spring washers frictionally engaging opposed faces of said gear. 10. A speed reducing means comprising: a. a housing including a base portion, b. a support plate carried by said base portion through a plurality of lugs carried by said support plate and engaging said base portion, and c. a gear train disposed wherein said housing and including an input gear and an output gear, said gear train carried by said support plate. 11. A speed reducing means according to claim 10 wherein said housing comprises a cup shaped member and a cover closing same. 12. A speed reducing means according to claim 11 wherein said base portion comprises the closed end of said cup shaped member. 13. A clutch comprising: a. a first rotating member carried on a shaft, b. a second rotating member carried about said first rotating member, c. a spring biased, pivotly mounted pawl carried by said first rotating member, d. stop means carried by said first rotating member, and e. internal teeth provided in a hub of said second rotating member selectively engaging said pawl. 14. A clutch according to claim 13 wherein a leaf spring carried by said first rotating member spring biases said pawl. 15. A clutch according to claim 13 wherein said stop means includes a post carried by said first rotating member. 16. A clutch according to claim 13 wherein said first rotating means comprises a pinion, and said second rotating member comprises a gear, said gear having internal teeth engaging said pawl. |
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