JP2003020685A5 - - Google Patents

Description

本発明を具体化する場合、特に、特許請求の範囲の請求項３に記載のように具体化すれば、転動体と間座を転動体収容空間内に収容する作業が容易に行えることに加え、外輪に比べて格段に小さな部品である止め栓に給脂孔を形成すれば済むので、給脂孔を外輪に直接設ける場合に比べて給脂孔の加工設備を簡素化することができて、その分、旋回軸受を安価に製作することができる。 When the present invention is embodied, in particular, according to claim 3 of the present invention, the rolling element and the spacer can be easily accommodated in the rolling element accommodation space. Since it is sufficient to form the grease hole in the stopper plug which is a much smaller part than the outer ring, the processing equipment of the grease hole can be simplified as compared with the case where the grease hole is directly provided in the outer ring Therefore, the pivot bearing can be manufactured inexpensively.

Claims (3)

上部旋回体側の駆動ピニオンと噛み合う内歯車を有し下部走行体側に固定される内輪と、この内輪を囲んで上部旋回体側に固定される外輪とを備え、これら内輪と外輪との間に環状の転動体収容空間を形成するとともに、間座本体にプラスチックグリースを充填して間座本体からプラスチックグリース内のグリースを外部に滲出できるように間座を構成し、転動体収容空間内に多数の転動体と間座を収容して間座を転動体間に配置した建設機械の旋回軸受において、内輪と外輪との間に間隙を設けてこの間隙の少なくとも下部をシール部材で密封することにより、この間隙で転動体収容空間の上方及び下方にグリース溜りを形成し、これらのグリース溜りにグリースを予め充填して内輪及び外輪と転動体との接触部にグリースを行き渡らせるように構成したことを特徴とする建設機械の旋回軸受。  An inner ring having an internal gear meshing with a drive pinion on the upper swing body side and fixed to the lower traveling body side, and an outer ring fixed to the upper swing body side surrounding the inner ring, and having an annular shape between the inner ring and the outer ring In addition to forming the rolling element accommodation space, the spacer body is filled with the plastic grease so that the spacer in the plastic grease can be leaked out from the spacer body, and a large number of rolling elements are accommodated in the rolling element accommodation space. In a swing bearing of a construction machine in which a moving body and a spacer are accommodated and the spacer is disposed between the rolling elements, a gap is provided between the inner ring and the outer ring, and at least a lower portion of the gap is sealed by a seal member. A grease reservoir is formed above and below the rolling element accommodation space with a gap, and these grease reservoirs are prefilled with grease to spread the grease over the contact portion between the inner ring and the outer ring and the rolling element. Determined swing bearing, characterized in that the sea urchin configuration. 転動体収容空間の側方に給脂孔に繋がるグリース溜りを設けたことを特徴とする請求項１に記載の建設機械の旋回軸受。 2. The swing bearing of the construction machine according to claim 1, wherein a grease reservoir connected to the oil supply hole is provided on the side of the rolling element accommodation space . 外輪に、転動体や間座を外輪の外側から転動体収容空間内に組み込むための組込孔及びこの組込孔を密封する止め栓を設けるとともに、この止め栓に、外輪の外側から転動体収容空間内に開口する給脂孔を設けたことを特徴とする請求項１に記載の建設機械の旋回軸受。  The outer ring is provided with a built-in hole for incorporating the rolling elements and the spacer into the rolling element accommodation space from the outer side of the outer ring, and a plug for sealing the built-in hole. The slewing bearing for a construction machine according to claim 1, further comprising a grease hole opened in the accommodation space.