| 摘要 |
PROBLEM TO BE SOLVED: To prevent bending while improving housing by freely rotating at least one connecting port around the horizontal axis, holding the other end part in a vertical directional attitude, and connecting a flexible hydraulic pipe. SOLUTION: The rear ends of supply piping and return piping 40 to 42 are connected to a control valve 37, a hexagonal rotary piece 45 freely rotatable around the lateral directional axis is arranged in a swivel joint 44, and a connecting port 43 is projected on the outer periphery to connect the respective piping 40 to 42. A tractor 1 side connecting port 53 and a backhoe 7 side connecting port 43 are connected via a flexible hydraulic hose 55, and a supply oil passage 58 and a return oil passage 59 are composed of the respective piping 40 to 42, 50 to 52 and the hydraulic hose 50. An L-shaped elbow joint 56 is arranged in an end part of a hydraulic hose 55, and an attitude of an end part of the hose 55 is held in a state of turning in the vertical direction. Thus, while preventing bending, housing can be improved by shortening the hydraulic hose, and contact with the periphery is reduced to prevent wear and tear.
|
