BALL SCREW

• Main Author: YAMAMOTO SHINPEI
• Format: Patent
• Language: English; Japanese
• Published: 14.05.2024
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a ball screw capable of securing discharge of foreign matter while securing lubricity.SOLUTION: A ball screw has: a screw shaft, on which an outer peripheral screw groove is formed; a nut, on which an inner peripheral screw groove is formed; plural balls housed in plural rolling paths formed by the outer peripheral screw groove and the inner peripheral screw groove opposed to each other; and first and second tubes for returning the balls from one end of the rolling path to the other end. A compressed preload is applied to the ball screw. The first tube is arranged at an upper circumferential part of the nut, and the second tube is arranged at a lower circumferential part of the nut. The ball screw is arranged under a condition that an axial line of the screw shaft is inclined, and the first tube is arranged on a side of a region for receiving a main load.SELECTED DRAWING: Figure 3 【課題】潤滑性を確保しつつも、異物の排出を確保できるボールねじを提供する。【解決手段】ボールねじは、外周ねじ溝が形成されたねじ軸と、内周ねじ溝が形成されたナットと、対向する前記外周ねじ溝と前記内周ねじ溝とにより形成される複数の転動路内に収容される複数のボールと、前記ボールを前記転動路の一端から他端に戻す第１のチューブ及び第２のチューブと、を有するボールねじであって、前記ボールねじは、圧縮予圧が付与されており、前記第１のチューブは、前記ナットの円周方向上方に配置され、前記第２のチューブは、前記ナットの円周方向下方に配置され、前記ボールねじは、前記ねじ軸の軸線が傾いた状態で配置され、前記第１のチューブが、主荷重を受ける領域側に配置されている。【選択図】図３