JPH025445U

JPH025445U -

Info

Publication number: JPH025445U
Application number: JP7919888U
Authority: JP
Priority date: 1988-06-15
Filing date: 1988-06-15
Publication date: 1990-01-16
Anticipated expiration: 2003-06-15
Also published as: JPH0624439Y2

Description

[Brief explanation of the drawing]

第１図はこの考案の建設機械の旋回軸受装置の
好適実施例を示す平面図、第２図は第１図の―
線断面図、第３図は本考案の別の実施例を示す
部分断面図、第４図は従来の旋回軸受の縦断面図
、第５図は従来の油圧シヨベルの上部旋回体と下
部旋回体の連結状態を示す説明図である。３……旋回軸受、４……ピン、４ａ……ネジ穴
、６……内輪基部、７……内歯部、８……ピン孔
、９……第１ピン孔構成溝、１０……第２ピン孔
構成溝、１３……ボール、２０……境界部、２１
……係合段部、２２……係合溝部。 FIG. 1 is a plan view showing a preferred embodiment of the swing bearing device for construction machinery of this invention, and FIG.
3 is a partial sectional view showing another embodiment of the present invention, FIG. 4 is a vertical sectional view of a conventional swing bearing, and FIG. 5 is a conventional upper and lower rotating body of a hydraulic excavator. It is an explanatory view showing a connected state. 3...Swivel bearing, 4...Pin, 4a...Threaded hole, 6...Inner ring base, 7...Inner gear part, 8...Pin hole, 9...First pin hole forming groove, 10...No. 2-pin hole configuration groove, 13...Ball, 20...Boundary part, 21
...Engagement step portion, 22...Engagement groove portion.

Claims

[Scope of Claim for Utility Model Registration] (1) Balls are interposed inside the annular outer ring part provided at the lower part of the upper rotating body, and the annular inner ring part provided at the upper part of the lower traveling body is fitted to enable free rotation. In a slewing bearing device for construction machinery, the inner ring has an inner ring base that serves as the inner ring side bearing on the outside, and internal teeth for power transmission that are fitted concentrically on the inside through a boundary with a slight gap. and an internal toothed part provided therein, and the inner ring base and the internal toothed part are removably fixed by pins pushed in at predetermined intervals along the boundary between the inner ring base and the internal toothed part. Bearing device. (2) The swing bearing device for construction machinery according to claim 1, wherein a screw hole is provided in the upper part of the pin. (3) An engagement step protruding toward the inner ring base is provided at the lower end of the outer circumferential surface of the inner tooth, and an engagement groove is provided on the inner circumference of the inner ring base to engage with the engagement step. 2. The swing bearing device for construction machinery according to claim 1, wherein the swing bearing device is restrained upwardly.