| 摘要 |
PROBLEM TO BE SOLVED: To provide a plastic fastening part mutually fastening divided pieces, enhanced against coming off. SOLUTION: A built-up type crankshaft 1 is built up as one body by mutually assembling a plurality of divided pieces 2A-2I by the plastic fastening parts 3. The plastic fastening part 3 includes building hole parts 8 formed on one sides of the adjacent divided pieces 2A-2I, and building shaft parts 6 formed on other sides. Plastic fastening is carried out by pressing the building shaft part 6 into the building hole part and assembling the same. Oil holes 10, 11 are formed on the divided pieces 2A-2I over insides of the building shaft parts 6. Communication holes 14, 15 are formed with passing through the building hole part 8 and the building shaft part 6 in order to keep communication between the oil holes 10, 11 of the adjacent divided pieces 2A-2I. Hollow pins 16, 17 are inserted in the communication holes 14, 15. Communication between the oil holes 10, 11 of the adjacent divided pieces 2A-2I is kept through hollow parts 16a, 17a and lateral holes 16b, 17b of the hollow pins 16, 17. COPYRIGHT: (C)2009,JPO&INPIT
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