PROBLEM TO BE SOLVED: To provide a trank roller of a crawler type travel device capable of preventing the invasion of a foreign matter such as earths into a roller shell thereby to support the roller shell stably for a long period of time.SOLUTION: A roller shell 11 is rotatably supported by a pair of roller bearings 12 having a self-lubricating property, and an axial load to be loaded by the roller shell 11 is dispersed by a pair of roller bearings 12, thereby to prevent damage of the bearing. An opening of an outer side end part of the roller shell 11 is closed by attaching a lid body 16, and an end opening on an inner side is sealed by a seal device 20 thereby to prevent invasion of soil. In the seal device 20, a ground packing 23 is assembled in a seal space 22 between an external diameter face of a stuffing box 21 fitted on a shaft 10 and an internal diameter face of an inner side end portion of the roller shell 11, and is pushed onto a flange 21a of the stuffing box 21 by a packing holding cover 24 having an outer periphery fixed by bolts 25 on the inner side end face of the roller shell 11.SELECTED DRAWING: Figure 1
【課題】ローラシェル内への土砂等の異物の侵入を確実に防止することができ、ローラシェルを長期に亘って安定よく支持することができる履帯式走行装置の転輪を提供する。【解決手段】ローラシェル11を自己潤滑性を有する一対の転がり軸受12により回転自在に支持し、ローラシェル11から負荷されるアキシャル荷重を一対の転がり軸受12で分散し、軸受の損傷を防止する。ローラシェル11のアウタ側端部の開口を蓋体16の取り付けにより閉塞し、インナ側の端部開口をシール装置20によりシールし、土砂の侵入を防止する。シール装置20は、シャフト10に嵌合されたスタフィングボックス21の外径面とローラシェル11のインナ側端部の内径面間のシール空間22内に、グランドパッキン23を、組み込み、ローラシェル11のインナ側端面に外周部がボルト25止めされるパッキン押え蓋24によりスタフィングボックス21の鍔21aに押し付ける。【選択図】図1
TRANK ROLLER OF CRAWLER TYPE TRAVEL DEVICE
履帯式走行装置の転輪
2016-03-03
Patent
Electronic Resource
Japanese
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