| 摘要 |
PROBLEM TO BE SOLVED: To provide a gear box internal pressure relaxation device capable of relaxing the internal pressure of a gear box by allowing only gas to escape from the gear box to the outside without leaking a liquid such as a lubricating oil and eliminating need to make a long hole to drastically reduce the cost.SOLUTION: The device includes a rotation plane 12 which is provided at the end of the rotary shaft 9 of a gear 2, rotates together with the rotary shaft and is perpendicular to the rotary shaft, a fixed plane 14 which is provided on a casing 3 and positioned spaced a certain distance from the rotation plane 12 for the gas positioned between the plane 12 and the plane 14 to rotate, and a ventilation hole 16 which is provided to the casing 3 and extended from the position opposite to the rotary shaft in the fixed plane 14 to the outside. |
