| 摘要 |
The present invention discloses a ratchet wheel of wrenches, the structure of the ratchet wheel has a penetrating hole consisting of two adjacent receiving holes having internal diameters differing from each other, each internal periphery has six forefront surfaces, six grooves and six concavities, the concavities and the grooves are disposed annularly in an interlaced order that are capable of containing flanges of a gear-shape workpiece, and the forefront surfaces are capable of latching the edges of a hexagonal workpiece. Whereby, each receiving hole can respectively accommodate, latch and drive several kind of workpieces with different size, and prevent workpieces from passing through the wrench randomly
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