| 摘要 |
A precision peristaltic metering pump comprises a base, a case structure, a differential device, and a hose. The case structure is disposed on the base and has a lateral wall. The differential device comprises a first member, a second member, a plurality of planet gears, and a sun gear, wherein the first member has a first internal gear and a plurality of rollers. The second member has a second internal gear. Each planet gear has a first external gear and a second external gear. The first and second external gears mesh with the first and second internal gears respectively. The sun gear pivotally connects with the base and meshes with the plural planet gears. Hence, while the sun gear drives the planet gears, the first member is in rotation relative to the second member. The hose is pushed by the rollers so as to urge the lateral wall.
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