Running Device for Dump Truck

A travel assembly for a dump truck, said travel assembly having a wheel on which a tire is to be mounted, a spindle inserted on a side of an inner periphery of the wheel, wheel bearings arranged between an outer peripheral wall of the spindle and an inner peripheral wall of the wheel to enable rotation of the wheel about the spindle, a motor arranged on a side of an end of the spindle, a shaft non-rotatably connected to an output shaft of the motor, inserted on a side of an inner periphery of the spindle and extending out from an opposite end of the spindle, a reduction gear unit arranged on a side of the opposite end of the spindle and interposed between the shaft and the wheel to transmit power from the shaft to the wheel, and a support bearing arranged on the spindle and supporting the shaft thereon, wherein:

• the spindle comprises a chassis-side member to be fixedly secured on a chassis of the dump truck and a reduction gear unit-side member located on a side closer to the reduction gear unit than the chassis-side member,
• the reduction gear unit-side member is located surrounding a portion of the shaft, at which a distance to a connected part between the motor and the shaft and a distance to a connected part between the reduction gear unit and the shaft become equal to each other, and
• on an inner peripheral wall of the reduction gear unit-side member, a flange for the arrangement of the support bearing has been formed together with the reduction gear unit-side member by casting.