Cam follower with roller
AssigneeNtn Corporation
InventorsKazuyoshi Harimoto, Yoshiyasu Nakano, Masaru Kitagawa, Nobuhiro Kasahara
Life of this patent
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Abstract
The cam follower with roller according to the present invention includes a cam follower body having a roller supporting portion integrally formed therein, a supporting shaft of which both ends are fixed to the roller supporting portion, and a roller rotatably supported to the supporting shaft with a plurality of needle rollers interposed. At least one of the supporting shaft, needle roller and roller is formed of heat-resisting steel, and the both ends of the supporting shaft is caulked to be fixed to the supporting portion.
Claims14
A cam follower with roller, comprising:
- a cam follower body having a roller supporting portion integrated into the cam follower body;
- a supporting shaft of which both ends are fixed to said roller supporting portion;
- and
- a roller rotatably supported on said supporting shaft with a plurality of needle rollers interposed, wherein
- at least one of said supporting shaft, said needle rollers and said roller is formed of heat-resistant steel, and
- an effective hardened portion in a rolling contact surface of an outer circumferential surface of said supporting shaft, upon which said needle roller rolls, has a hardness of at least HV 550 and a depth of at least 1.0 mm.
A cam follower with roller, comprising:
- a cam follower body having a roller supporting portion integrated into the cam follower body;
- a supporting shaft of which both ends are fixed to said roller supporting portion;
- and
- a roller rotatably supported on said supporting shaft with a plurality of needle rollers interposed, wherein
- at least one of said supporting shaft, said needle rollers and said roller is formed of heat-resistant steel, and
- said heat-resistant steel is made of a steel material at least containing as alloy elements in a matrix, by mass %, at least 0.6% and at most 1.3% of C, at least 0.3% and at most 3.0% of Si, at least 0.2% and at most 1.5% of Mn, at most 0.03% of P, at most 0.03% of S, at least 0.3% and at most 5.0% of Cr, at least 0.1% and at most 3.0% of Ni, at most 0.050% of Al, at most 0.003% of Ti, at most 0.0015% of 0 and at most 0.015% of N, and a remaining part having Fe and an unavoidable impurity.
Dependencies are inferred from the claim text.