| 摘要 |
PROBLEM TO BE SOLVED: To ensure the mud-removing performance, to reduce the life of the mud, and to surely prevent the disturbance of adjacent seedlings by setting the sweepback angle of the axial component of the lug outside a wheel in the direction of rotation of wheel relative to the axial component of the lug inside the wheel. SOLUTION: Lugs 15 are raised with intervals in the circumferential direction on an outer circumferential part of an elastic wheel body 13 of a wheel 10, i.e., a tread part 14, a circumferential component 16 and an axial component 17 located on the equatorial plane forming the center of the tread part 14 are integratedly formed with each other, and arranged in a staggered manner in the right-to-left direction inside and outside the tread part 14. The sweepback angle of the axial component 17 on the left side of the tread part 14 in the direction of rotation of the wheel is set to be 0 deg., i.e., parallel to an axle. On the other hand, the sweepback angleθof the axial component on the right side of the tread part 14 is set to be as large as 15 deg.. The turning performance can be improved thereby without sacrificing any traction performance or the mud-removing performance. |
