WORK MACHINE

• Main Authors: KOTAKE SHINICHI, IZUMI SHIHO, ISHIBASHI HIDETO
• Format: Patent
• Language: English; Japanese
• Published: 01.04.2021
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; DREDGING; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; SOIL SHIFTING; TESTING

To measure a position and a direction of an upper structure of a work machine with high accuracy.SOLUTION: A work machine comprises: a plurality of antennae provided in an upper structure 4 and receiving satellite signals from a plurality of satellites; and a calculation device calculating a position and a direction of the upper structure 4 based on the satellite signals received by the plurality of antennae. The plurality of antennae include a main antenna 28a. The work machine further comprises: an antenna support device 80 supporting the main antenna 28a so that a phase center of the main antenna 28a is positioned on a revolving center axis C0 of the upper structure 4; and a revolving bearing device 40 including an outer ring 41 provided in the upper structure 4, an inner ring 42 provided in a lower structure 5, and a plurality of rolling bodies 43 provided between the outer ring 41 and the inner ring 42. The antenna support device 80 is fixed to the upper structure 4 by a connection member 60 connecting the outer ring 41 with the upper structure 4.SELECTED DRAWING: Figure 3 【課題】作業機械の上部旋回体の位置及び方位を精度よく測定する。【解決手段】作業機械は、上部旋回体４に設けられ複数の衛星から衛星信号を受信する複数のアンテナと、複数のアンテナで受信された衛星信号に基づいて上部旋回体４の位置及び方位を演算する演算装置と、を備える作業機械において、複数のアンテナには、メインアンテナ２８ａが含まれ、メインアンテナ２８ａの位相中心が上部旋回体４の旋回中心軸Ｃ０上に位置するように、メインアンテナ２８ａを支持するアンテナ支持装置８０と、上部旋回体４に設けられる外輪４１と、下部走行体５に設けられる内輪４２と、外輪４１と内輪４２との間に設けられる複数の転動体４３と、を有する旋回軸受装置４０と、を備え、アンテナ支持装置８０は、外輪４１と上部旋回体４とを接続する接続部材６０によって、上部旋回体４に固定される。【選択図】図３