Patent ID: 6935633

Claim:
A shaft sealing device, comprising: a shaft tube having a first end on which provided with a rotary ring, and a second end; a main body provided with an axial hole; a fixed sealing ring being inserted in the axial hole of the main body and adapted to confront with the rotary ring; a positioning ring being inserted in the axial hole of the main body and mounted to the main body, the positioning ring provided with at least one positioning hole and at least one elastic member inserted thereinto; and a retaining ring being inserted in the axial hole of the main body, the retaining ring having a first sidewall and a second sidewall; wherein the fixed sealing ring, the retaining ring and the positioning ring are disposed on the shaft tube in loose fit manner to allow for rotation of the shaft tube; and wherein the retaining ring is located between the fixed sealing ring and the positioning ring after assembling, and the first side wall of the retaining ring connected with the fixed sealing ring to limit rotation while the second side wall of the retaining ring being biased by the elastic member of the positioning ring, the first sidewall of the retaining ring including at least one first engaging member, the second sidewall of the retaining ring including at least one second engaging member, the first engaging member being longitudinally aligned with the corresponding second engaging member so as to simplify the entire structure of the retaining ring.