| 摘要 |
PURPOSE: A hydraulic motor, a hydraulic motor device, and a construction equipment with the hydraulic motor device are provided to improve cooling effect in both a valve plate bearing and an output shaft bearing of the hydraulic motor and to extend the life of the bearing and an oil sealing part by effectively discharging pollutants of a discharge chamber of the hydraulic motor. CONSTITUTION: A hydraulic motor(1) comprises a front casing(3), an output rotary shaft(2), a rear casing(18), a penetration passage(16), and a discharge port(24). The output rotary shaft is supported in the internal side of the front casing. The output rotary shaft comprises multiple pistons(10), tilt plates(8), a valve plate(17), and a recessed part(15). The pistons are circumferentially arranged on the top of the output rotary shaft. The tilt plate is installed in the front end of the pistons. The recessed part is formed in the center of the pistons. The rear casing comprises a protruded part(14) and a makeup port. The protruded part is fitted in the recessed part. The makeup port is connected to a hydraulic circuit. The bottom of the penetration passage is communicated with the recessed part and the top thereof is opened in the outside of the hydraulic motor. One side of the discharge port is communicated with an axial front casing of the output rotary shaft and the other side thereof is opened in the outside of the hydraulic motor. |
