PROBLEM TO BE SOLVED: To provide a roller device of an undercarriage which can prevent a foreign object such as earth and sand from intruding into a floating seal through a gap between a collar and a roller, and ensure the sealability of a floating seal for a long time.SOLUTION: A cylindrical collar 20 having a circular flange part 20a is fitted and fixed to both end parts of a shaft 16. An opening 16d is provided on the inner peripheral side of a flange part 16c of a collar 16. The opening 16d faces an outer peripheral face 20d of the flange part 20a of the collar 20 through a gap 27. A floating seal 26 for sealing a lubricating oil is provided between a seal housing hole 20b provided in the collar 20 and a seal housing hole 16e provided in the roller 16. A corner edge 20g is formed between the outer peripheral face 20d of the flange part 20a of the collar 20 and an axial outer end face 20f of the collar 20. An axial position of the corner edge 20g is matched with an axial position of an innermost peripheral part 16k on the outside in an axial direction of the flange part 16c of the roller 16.

    【課題】カラーとローラとの間の隙間からの土砂等の異物のフローティングシールへの侵入が防止され、フローティングシールのシール性がより長期にわたって確保できる下部走行体のローラ装置を提供する。【解決手段】円形の鍔部20aを有する筒状のカラー20を、軸16の両端部に嵌合して固定する。ローラ16の鍔部16cの内周側に開口部16dを設ける。開口部16dを、カラー20の鍔部20aの外周面20dに隙間27を介して対向させる。カラー20に設けたシール収容穴20bと、ローラ16に設けたシール収容穴16eとの間に、潤滑油を封止するフローティングシール26を設ける。カラー20の鍔部20aの外周面20dとカラー20の軸心方向外側端面20fとの間にコーナー縁20gを形成する。コーナー縁20gの軸心方向の位置を、ローラ16の鍔部16cの軸心方向外側における最内周部16kの軸心方向の位置に一致させる。【選択図】図4


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    Title :

    ROLLER DEVICE OF UNDERCARRIAGE


    Additional title:

    下部走行体のローラ装置


    Contributors:

    Publication date :

    2015-08-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge / E02F Baggern , DREDGING / F16C SHAFTS , Wellen / F16J Kolben , PISTONS



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