| 摘要 |
<p>A truss screed (10, 210) includes a shaft guard (16, 216) that covers the screed's exciter shaft (14, 214) to protect it from concrete and debris and that protects the surroundings from the rotating exciter shaft. The shaft guard (16, 216) includes a plurality of tubing sections (100, 104, 300, 304) that surround the shaft and that are supported on joints (112, 312) disposed between the guard sections. In one preferred embodiment, each joint (312) includes a support cup (316) that supports an end of the associated tubular section, a bearing (270), and a U-shaped bracket (430) that couples the support cup to the bearing. Joints located at a juncture between adjacent screed sections also include a cup guide (432) that bears the associated support cup (430) while permitting limited tilting movement of the support cup (430) relative to the bearing (270). Each joint accommodate component misalignment, provide an at least limited seal, and permit adjustment of the angular orientation of adjacent screed sections relative to one another.</p> |
