JPH0369052U

JPH0369052U -

Info

Publication number: JPH0369052U
Application number: JP13046289U
Authority: JP
Priority date: 1989-11-08
Filing date: 1989-11-08
Publication date: 1991-07-09

Description

[Brief explanation of drawings]

第１図は本考案のピン継手におけるガタ防止装
置を油圧掘削機の回転フレームにブーム基端部を
枢着するための回動支持部に適用した第１実施例
を示す図、第２図は同じく第２実施例を示す図、
第３図は従来の技術を示す図である。１ａ，１ｂ……支持脚、２……ブーム基端部、
３……軸ピン、３ａ……ねじ部、３ｂ……フラン
ジ部、４……ブツシユ、４ａ，４ｂ……弾性部、
５，６……テーパローラ型軸受、５ａ，６ａ……
インナレース、５ｂ，６ｂ……アウタレース、５
ｃ，６ｃ……ローラ、５ｄ，６ｄ……スペーサ、
７，８……スペーサ、９，１０……Ｏリング、１
２，１３……カバー、１６，１７……オイルシー
ル、１８……ナツト、１９……プレート、２０…
…ボルト、２１……グリース、２４，２５……弾
性ブツシユ、３１……軸ピン、３１ｂ……平面部
、３２……軸受け、３３……クサビ、３３ａ……
平面部、３３ｂ……端部、３４……プレート、３
５……ボルト。 Fig. 1 is a diagram showing a first embodiment in which the anti-backlash device in a pin joint of the present invention is applied to a rotation support part for pivotally connecting the base end of a boom to a rotating frame of a hydraulic excavator. A diagram also showing the second embodiment,
FIG. 3 is a diagram showing a conventional technique. 1a, 1b...Support legs, 2...Boom base end,
3... Axis pin, 3a... Threaded part, 3b... Flange part, 4... Bush, 4a, 4b... Elastic part,
5, 6...Taper roller type bearing, 5a, 6a...
Inner lace, 5b, 6b...Outer lace, 5
c, 6c...Roller, 5d, 6d...Spacer,
7, 8... Spacer, 9, 10... O ring, 1
2, 13... Cover, 16, 17... Oil seal, 18... Nut, 19... Plate, 20...
... Bolt, 21 ... Grease, 24, 25 ... Elastic bushing, 31 ... Axis pin, 31b ... Flat part, 32 ... Bearing, 33 ... Wedge, 33a ...
Plane portion, 33b... end, 34... plate, 3
5...Bolt.

Claims

[Claims for Utility Model Registration] (1) A second member is arranged between two supporting legs of the first member, and a shaft pin inserted through the supporting legs of the first member and the second member is connected to the supporting legs of the first member. In the pin joint fixed to the shaft pin, an elastic bushing is interposed between the shaft pin and the shaft pin hole formed in the support leg of the first member, the inner diameter of which is reduced by the shaft load, and the outer diameter of which is expanded. A backlash prevention device in a pin joint, characterized by: (2) A pin joint in which a second member is arranged between two supporting legs of the first member, and a shaft pin inserted through the supporting legs of the first member and the second member is fixed to the supporting legs of the first member, Preventing rattling in a pin joint, characterized in that a second member is pivotally supported via a tapered roller type bearing on an elastic bushing fitted to a shaft pin, which reduces the inner diameter and expands the outer diameter by the shaft load. Device. (3) The play prevention device for a pin joint according to claim (2), characterized in that a sealing device is provided on the axially outer side of the tapered roller type bearing, and lubricating oil is sealed between the sealing devices. (4) The rattling prevention device for a pin joint according to claim (2), characterized in that the gaps in the radial direction and the thrust direction of the tapered roller type bearing are substantially zero. (5) A pin joint in which a second member is arranged between two supporting legs of the first member, and a shaft pin inserted through the supporting legs of the first member and the second member is fixed to the supporting legs of the first member, A plane is formed in the shaft pin portion that fits into the shaft pin hole formed in the support leg of the first member, and extends axially inward from the shaft end and away from the center of the pin, and a wedge is inserted into the plane. Features a backlash prevention device for pin joints.