| 摘要 |
There is provided a wheel motor device (100A-100E) including a hydraulic motor unit (200). The hydraulic motor unit includes a hydraulic motor main body (210), a motor shaft (220), a motor case (250) and a port block (300-300E). The port block includes a motor surface (300M) to which the motor case (250) is connected, a pump surface (300P) to which a pump case (450) surrounding a hydraulic pump main body (410) is detachably connected so as to form a pump space (400P) for accommodating the hydraulic pump main body (410), and a pair of operational fluid passages (310a,310b) fluidly connecting between the hydraulic motor main body (210) accommodated in the motor space (200M) in a state of being contacted with the motor surface (300M) in a sliding manner around its axis line and the hydraulic pump main body (410) accommodated in the pump space (400M) in a state of being contacted with the pump surface (300P) in a sliding manner around its axis line.
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