JPS56129710A - Rocker arm - Google Patents

Rocker arm

Info

Publication number
JPS56129710A
JPS56129710A JP3356280A JP3356280A JPS56129710A JP S56129710 A JPS56129710 A JP S56129710A JP 3356280 A JP3356280 A JP 3356280A JP 3356280 A JP3356280 A JP 3356280A JP S56129710 A JPS56129710 A JP S56129710A
Authority
JP
Japan
Prior art keywords
rocker arm
valve
camshaft
nitriding
abutting surfaces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3356280A
Other languages
Japanese (ja)
Inventor
Kiyoshi Sakaguchi
Takeshi Nakakohara
Hiroyuki Murase
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP3356280A priority Critical patent/JPS56129710A/en
Publication of JPS56129710A publication Critical patent/JPS56129710A/en
Pending legal-status Critical Current

Links

Landscapes

  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

PURPOSE: To improve wear resistance by a method wherein at least the abutting parts of the rocker arm against a camshaft and a valve are made of cast iron containing with specified percentage of chromium and the abutting surfaces of the rocker arm against the camshaft and the valve are treated with nitriding.
CONSTITUTION: When the rocker arm 3 is pushed down by the nose 2a of a cam 2 due to the rotation of the camshaft 1, the valve 4 is pushed to open against a spring 5 by the rocker arm 3 pivoted about a pivot 6 in a pivot type valve mechanism. In this case, at least the abutting parts 3a and 3b of the rocker arm 3 against the camshaft 1 and the valve 4 are made of cast iron containing with 5W36% chromium. And the abutting surfaces of the rocker arm against the camshaft 1 and the valve 4 are treated with nitriding, such as soft-nitriding, ionitriding or the like. By this treatment, subject abutting surfaces are hardened and improved their wear resistances.
COPYRIGHT: (C)1981,JPO&Japio
JP3356280A 1980-03-17 1980-03-17 Rocker arm Pending JPS56129710A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3356280A JPS56129710A (en) 1980-03-17 1980-03-17 Rocker arm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3356280A JPS56129710A (en) 1980-03-17 1980-03-17 Rocker arm

Publications (1)

Publication Number Publication Date
JPS56129710A true JPS56129710A (en) 1981-10-12

Family

ID=12389981

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3356280A Pending JPS56129710A (en) 1980-03-17 1980-03-17 Rocker arm

Country Status (1)

Country Link
JP (1) JPS56129710A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5841132A (en) * 1981-08-31 1983-03-10 松下電工株式会社 Apparatus for washing local part of human body
JPS58180708A (en) * 1982-04-16 1983-10-22 Yanmar Diesel Engine Co Ltd Valve rocker system member of internal-combustion engine
JPS6321307A (en) * 1986-07-11 1988-01-28 Nissan Motor Co Ltd Rocker arm tip
US4870931A (en) * 1987-05-30 1989-10-03 Nippon Piston Ring Co., Ltd. Rocker arm having wear resistant scuffing resistant portion

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5841132A (en) * 1981-08-31 1983-03-10 松下電工株式会社 Apparatus for washing local part of human body
JPS58180708A (en) * 1982-04-16 1983-10-22 Yanmar Diesel Engine Co Ltd Valve rocker system member of internal-combustion engine
JPS6321307A (en) * 1986-07-11 1988-01-28 Nissan Motor Co Ltd Rocker arm tip
JPH0467002B2 (en) * 1986-07-11 1992-10-27 Nissan Motor
US4870931A (en) * 1987-05-30 1989-10-03 Nippon Piston Ring Co., Ltd. Rocker arm having wear resistant scuffing resistant portion

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