| 摘要 |
A TIMING CHAIN TENSIONING DEVICE (12) FOR A VALVE MECHANISM INCLUDED IN AN OHC INTERNAL COMBUSTION ENGINE COMPRISES AN ARM (13), AND A RESIN SHOE (14) MOUNTED ON THE ARM (14) SO AS TO EXTEND ALONG A SURFACE FACING A TIMING CHAIN OF THE ARM (14). A U-SHAPED HOOK (14i) THAT ENGAGES A FREE END PART OF THE ARM (13) IS FORMED IN A FREE END PART OF THE RESIN SHOE (14), A SIDE LUG (14C) IS EXTENDED FROM ONE SIDE OF A BASE END PART OF THE RESIN SHOE (14) SO AS TO CORRESPOND TO THE ATTACHING PART (13A) OF THE ARM (13), AND THE SIDE LUG (14C) IS PROVIDED WITH AN OPENING (14B) FOR USE IN FASTENING THE ATTACHING PART (13A) OF THE ARM (13) AND THE BASE END PART OF THE RESIN SHOE (14) TOGETHER. A CUSHIONING PAD (14G) HAVING A U-SHAPED CROSS SECTION IS FORMED IN A SUBSTANTIALLY MIDDLE PART OF THE RESIN SHOE (14) SO AS TO EXTEND ALONG A SIDE TO THE BACK SURFACE OF THE ARM (13). THE ARM (13) IS INSERTED IN A GROOVE FORMED IN THE CUSHIONING PAD (14G). THUS, THE NUMBER OF PARTS IS REDUCED, MANUFACTURING MAN-HOURS CAN BE REDUCED, AND NECESSARY WORK CAN BE REDUCED.(FIG 3)
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