CAM LOBE FOR ASSEMBLED CAMSHAFT AND ITS MANUFACTURING METHOD,申请号JP20020356534-传众专利搜索

CAM LOBE FOR ASSEMBLED CAMSHAFT AND ITS MANUFACTURING METHOD

申请公布号：JP2004190715(A)

申请号：JP20020356534

申请日期：2002.12.09

申请公布日期：2004.07.08

申请人：

NISSAN MOTOR CO LTD

发明人：KOYANAGI KOJI;MABUCHI YUTAKA;OKADA YOSHIO;NISHIMURA KIMIO;MORIYA SATORU;OBARA YUJIRO;TAKANO YUTAKA

分类号：F01L1/04;F16H53/02;(IPC1-7):F16H53/02

主分类号：F01L1/04

摘要：PROBLEM TO BE SOLVED: To provide a cam lobe for an assembled camshaft with competitive manufacturing costs capable of preventing breaks caused by extending works of a tube. SOLUTION: The cam lobe 30 comprises a base circle portion 31 arranged on a through-hole 32, and a nose 34 extending outward to a radial direction rather than the base circle portion 31. The cam lobe 30 is fastened on an outer periphery of a shaft material by radially extending the shaft material after inserting the circle-shaped shaft material into the through-hole 32. A material of the cam lobe is composed of case hardening steel, and surface hardening treatment is applied to the cam lobe after it is formed to a cam shape. The relationship of a radial thickness T (mm) between an inner periphery of the through-hole 32 and an outer periphery of the base circle 31 with a radial depth D (mm) within a range having hardness of 550HV or more around the inner periphery of the through-hole 32 satisfies an expression of D≤0.4167T-1.0 (however, T≥2.4). COPYRIGHT: (C)2004,JPO&NCIPI