| 摘要 |
PURPOSE:To reduce stick slip by inserting a plurality of elastic spacers in equal intervals between the rolling bodies in an endless circulation path and absorbing the gap between the rolling bodies. CONSTITUTION:The inner cylindrical rollers 1 having the length nearly equal to the diameter are arranged on an endless circulation path alternately in directly contiguously, shifting the centers of the rotary shafts by 90 deg., and each A type elastic spacer is inserted in substitution for the cylindrical roller 1 at the position divided into three parts in a nearly equal pitch to the length L of the trajectory passage, in other words, one spacer is set into the load range 3, and two spacers are set into the load ranges 4 and 5, and thus absorption amount can be stabilized. In this case, a C-type spacer is inserted into a circumferential gap, and stick slip is generated artificially. Therefore, the intermittent sharp increase and reduction of the sliding resistance of the stick pipe is softened, and the large stick slip during the transfer from the upper to the lower can be avoided, and the sufficient effect can be developed even in use of a longitudinal type. |
