| 摘要 |
PURPOSE:To reduce vibrations at the time of rolling of rollers in a device to support the earth-contacting side of a crawler by rollers on the internal circumference to guide rotations by rolling guide parts of rollers on core metals of a crawler and contact parts of rollers on elastic materials separately. CONSTITUTION:When a drive sprocket 2 is rotated, a crawler 6 consisting of an endless belt 1 provided with perforations to be engaged with the drive sprocket 2 is rotated. At this stage, the earth-contacting side of the crawler 6 is supported by rollers 9 on the internal circumference to guide rotations. Guide parts 7 of rollers 9 are fitted between guide projections 4 of core metals 5 provided on the crawler 6, while contact parts 8 of elastic material are pushed for rotation to the surface of elastic material parts of the endless belt 1 positioned on both sides, right ane left, of engaging perforations 3 between front and rear core metals 5. In this construction, when the contact parts 8 are sunk excessively on the elastic material parts, the guide parts 7 are supported on core metals 5, and on the contrary, when the core metals 5 are excessively sunk, the contact parts 8 are supported by elastic material parts. |
