JPH0423837U

JPH0423837U -

Info

Publication number: JPH0423837U
Application number: JP6574890U
Authority: JP
Priority date: 1990-06-21
Filing date: 1990-06-21
Publication date: 1992-02-26
Anticipated expiration: 2005-06-21
Also published as: JPH0750595Y2

Description

[Brief explanation of the drawing]

第１図はこの考案の旋回軸受のロツク装置の好
適実施例に係る断面図、第２図は同平面図、第３
図は第２図の−線断面図、第４図は油圧シヨ
ベルの側面図、第５図は従来の油圧シヨベルの旋
回軸受の断面図、第６図は旋回軸受の隙間を説明
する断面図である。１……旋回軸受、２……内輪、２ａ……受面、
３……外輪、３ａ……受面、４……ボール、５…
…旋回側基台、６……固定側基台、１０……ロツ
ク装置、２０……油圧ロツクシリンダ、２１……
伸縮ロツド、２２……伸縮ロツドの先端、３０…
…ロツクプレート、３１……拘束壁部、４０……
油圧シヨベル。 FIG. 1 is a sectional view of a preferred embodiment of the locking device for a swing bearing of this invention, FIG. 2 is a plan view of the same, and FIG.
The figures are a cross-sectional view taken along the line - - in Fig. 2, Fig. 4 is a side view of a hydraulic excavator, Fig. 5 is a sectional view of a swing bearing of a conventional hydraulic excavator, and Fig. 6 is a sectional view explaining the clearance of the swing bearing. be. 1...Swivel bearing, 2...Inner ring, 2a...Bearing surface,
3...outer ring, 3a...receiving surface, 4...ball, 5...
...Swivel side base, 6... Fixed side base, 10... Lock device, 20... Hydraulic lock cylinder, 21...
Telescopic rod, 22... Tip of telescopic rod, 30...
...Lock plate, 31...Restriction wall, 40...
Hydraulic excavator.

Claims

[Claims for Utility Model Registration] (1) An annular outer ring is fixed to one of a swing-side base and a stationary-side base that are spaced apart in parallel, and an inner ring that is fitted into the outer ring is fixed to the other. In addition, a ball receiving portion having a substantially circular cross section is provided by forming receiving surfaces having a semicircular cross section on opposing surfaces of the inner ring and the outer ring so that the opening sides face each other, and a plurality of balls are fitted into the ball receiving portion. In a locking device for a swivel bearing that can be freely swiveled, the swivel bearing has an extendable reciprocating linear motion body on the swivel side base that extends in the axial direction toward the fixed side base and whose tip collides with the swivel side base. A plurality of restraint receiving parts are provided at approximately equal intervals along the outer circumferential direction on the outside of the fixed side base, and the restraint receiving part abuts against the tip of the reciprocating linear motion body that abuts against the fixed side base and restrains the swing bearing in the radial direction. A locking device for a swing bearing, characterized in that it is provided with: (2) A construction machine having an upper rotating body and a lower traveling body, wherein a swing side base is formed on the upper rotating body and a fixed side base is formed on the lower traveling body. slewing bearing locking device. (3) The locking device for a swing bearing according to claim 1, wherein the reciprocating linear motion body is comprised of a hydraulic cylinder having a telescopic rod, and is provided at three or more locations. (4) Claim 1 characterized in that the distal end of the reciprocating linear motion body is formed in a spherical shape, and the restraining wall portion is formed in a tapered shape that gradually becomes narrower toward the center on the proximal end side. A locking device for a slewing bearing as described in .