| 摘要 |
PROBLEM TO BE SOLVED: To reduce the speed by providing a belt having an internal tooth gear made of the flexible raw material, concentrically providing an inner wheel having an external tooth gear inside of the belt, and pushing the belt to the inner wheel with a pushing roller provided outside the belt. SOLUTION: An outer wheel 22 made of the flexible raw material and provided with through holes 22b, 22b, with a constant space in the periphery of a flange 22a thereof is fitted on a large diameter part 16b of a driving shaft 16. Pins 24, 24 are loosely fitted in the through holes 22b, 22b,..., and a gear 26 to be engaged with a gear 18 is provided at the inner end of each pin 24, 24.... A belt 28 of the flexible raw material is provided in the outer ends of the pins 24, 24... and arranged in a space at a position close to a pump. Furthermore, shafts 30a, 30a of pushing rollers 30 are fitted in upper grooves between a driving side fixed frame 12 and a driven side fixed frame 14, and the pushing rollers 30 contact with the belt 28 of the flexible raw material for pushing. With this structure, number of revolution of a motor can be easily lowered with the simple structure.
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