| 摘要 |
PROBLEM TO BE SOLVED: To lower the height of a swivel joint as much as possible. SOLUTION: A swivel joint 50 forms a plurality of oil grooves formed in the shape of a concentric circle in the direction of the radiation inside thereof at regular intervals and, at the same time, it is equipped with a fixed side oil channel forming case 51 connected to the oil grooves 53 and forming a fixed side oil channel and a movable side oil channel forming body 52 forming a plurality of movable side oil channels 55 extended in the direction of the radiation inside thereof. The movable side oil channel forming body 52 is mounted inside the fixed side oil channel forming case 51 in a rotatable manner and, at the same time, the front ends of the movable side oil channels 55 formed in the movable side oil channel forming body 52 are connected to the oil grooves 53 formed in the fixed side oil channel forming case 51.
|
