| 摘要 |
A trunnion (3) comprises a support (3C) for supporting a power roller (1), a first shaft part (3A) fanned on the top of the support (3C), a second shaft part (3B) formed on the bottom of the support (3C), and a pinhole (33) drilled in a surface (31) of the support (3C). A rod (6) with a pinhole (32) is inserted into the second shaft part (3B), and is joined to the trunnion (3) by pressing a pin (36) into the pinholes (33, 32). A die parting line (3S) when the trunnion (3) is formed, is set to pass outside the surface (31), and the support (3C), the shaft part (3A, 3B) and the surface (31) for drilling the pinhole (33) are formed in one piece by die forging. <IMAGE> |
