| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique improving durability life of a drive pin traveling type rubber crawler driven by abutting the drive pin of a drive wheel (also called a sprocket) on the drive projection of the rubber crawler. SOLUTION: The surface of the drive pin 101 of the sprocket 100 has a draft of a draft angleθ<SB>1</SB>tapered from a drive pin root 101a toward a drive pin tip end 101b. The driving force transmission wall part 4m of the drive projection 4 of the rubber crawler, abutting on the sprocket drive pin 101, has an outer surface fitted to the outer shape of the drive pin 101. COPYRIGHT: (C)2009,JPO&INPIT
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