| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability and durability by preventing deflection of a shaft, and to sufficiently lubricate a shaft bearing. SOLUTION: A wheel 12 is rotatably supported through wheel bearings 16, 17 on the outer peripheral side of a spindle 15, a traveling motor 18 is disposed on the inner peripheral side of the spindle 15, and rotation of the shaft 19 connected to a rotational shaft 18B of the traveling motor 18 is decelerated by a reduction gear 20 and is transmitted to the wheel 12. Also, an axially intermediate portion 19A of the shaft 19 is supported by the shaft bearing 44 provided between a sleeve 41 and a retainer 42. On the other hand, a spindle side oil supplying passage 48 is provided in an upper part of the spindle 15 and a retainer side oil supplying passage 49 is provided in the retainer 42. Lubricant oil G scattered on the upper surface of the spindle 15 when the wheel 12 rotates is supplied to the shaft bearing 44 through the spindle side oil supplying passage 48 and the retainer side oil supplying passage 49. COPYRIGHT: (C)2011,JPO&INPIT |
