| 摘要 |
PURPOSE: A low auger is provided to excavate a two-step-enlarged hole by enlarging the diameter of an auger by 100mm. CONSTITUTION: A low auger comprises a motor part(1), a deceleration device part(2), a gearbox part(3), a main cover part(4), and a socket part(5). The hollow pipe shaft part(31) of the gearbox part comprises a main gear(311), a hollow pipe shaft(312), and a support bearing part. The hollow pipe shaft delivers torque to a casing rod by receiving the torque from the main gear which is joined on the outer circumference by shrinkage-fitting. The metal part(3132b) of the support bearing part supports a load which is perpendicularly applied to the axial direction. |
