| 摘要 |
PURPOSE: A wheel load fatigue testing machine is provided to prolong the lifetime of the reaction roller or a reaction liner by preventing deflected abrasion or local abrasion in a reaction roller or on a reaction roller rolling face. CONSTITUTION: A jack-up spring(17), which presses a reaction roller(10) onto a reaction roller rolling face(11), by energizing a reaction roller shaft(14) in the reaction roller rolling face direction, is arranged. The jack-up spring is constituted with the reaction roller shaft being energized in the reaction roller rolling face direction via a reaction roller case(15), and a shift of the reaction roller case in the reaction roller rolling face direction is guided by a guide member(30). When a bottom face of the reaction roller case is supported by a seating base(18), an excessive load action to the jack-up spring due to reaction force of a carrying load force is prevented, and excessive displacement of the reaction roller due to deflection of the jack-up spring is controlled.
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