| 摘要 |
A crankset device has a chain ring, a tube connected to the chain ring, the tube having a hollow interior, and a crank arm passing through the chain ring, the hollow interior, an elastic washer, an annular retainer, and an annular cover. The crank arm has two protrusions. A first collar set surrounds the crank arm. A second collar set surrounds the crank arm. The first collar set is disposed in a first end portion of the tube. The second collar set is disposed in a second end portion of the tube. The annular cover covers the second end portion of the tube. The annular retainer is inserted in the annular cover. The elastic washer is disposed between the second collar set and the annular retainer.
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