POWER TRANSMISSION DEVICE FOR EXCAVATING EQUIPMENT

摘要

The present invention provides a bearing supporting device for a power transmission device for excavating equipment, which can provide stable supporting status of a thrust bearing. The bearing supporting device of the present invention comprises: a ring gear (8) to receive power for deceleration; a casing (10) to support the ring gear to be able to rotate inside; a hollow shaft (20) which rotates while being in contact with the ring gear and has a flange (22) extended outward and a penetrating hole (24); a bearing housing (18) supported by the casing (10); a pair of thrust bearings (40a, 40b) installed in between the bearing housing and the hollow shaft and installed on the top and the bottom of the flange to support the hollow shaft (20) against vertical external force; a radial bearing (50) installed in between the bearing housing and the hollow shaft to support the hollow shaft against external force in a radial direction; and an elastic member (26) installed in the penetrating hole (24) to provide a certain elastic force or greater always to the pair of thrust bearings (40a, 40b). The thrust bearing comes to roll by always receiving a certain force or greater from the elastic member.