Rocker arm

一种钢材、残余奥氏体的技术，应用在机器/发动机、机械设备、发动机元件等方向，能够解决润滑状态严重等问题，达到防止异常磨损或纵摇、耐转动疲劳性提高的效果

Inactive Publication Date: 2005-07-20
KOYO SEIKO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, if the viscosity of the engine oil used as a lubricant becomes lower, the lubrication state of the sliding contact surface of the valve rod receiving part will become more serious, and the above countermeasures alone will not be sufficient.

Method used

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  • Rocker arm
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Embodiment Construction

[0020] Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. Fig. 1 is an exploded perspective view showing the overall configuration of a rocker arm made of sheet metal, figure 2 It is a cross-sectional view at the center of the width direction of the sheet metal rocker arm. FIG. 3 is an enlarged cross-sectional view showing the contact state between the connecting wall of the sheet metal rocker arm and the valve stem. FIG. 4 is a graph showing the relationship between the number of repetitions and the amount of wear .

[0021] Referring to these figures, 1 denotes a rocker arm made of sheet metal, and the rocker arm 1 made of sheet metal has a main body 2 . The body 2 has a pair of opposing side walls 6,7. In the central region in the longitudinal direction of each of the opposing side walls 6, 7, there are shaft holes 6a, 7a for supporting the support shaft 3. As shown in FIG. The ends of the support shaft 3 a...

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Abstract

A rocker arm 1 made of sheet metal is formed so that Vickers hardness Hv of the surface layer portion 9a of the valve stem receiver 9 is set at Hv 650 to 800 and a quantity of the retained austenite gamma R is set at 25 to 35 vol%.

Description

technical field [0001] The invention relates to a rocker arm made of sheet metal for a valve mechanism of an automobile engine. Background technique [0002] A rocker arm made of sheet metal installed in a valve mechanism of an automobile engine has rollers arranged between a pair of opposite side walls of a main body made of sheet metal. on axis. Among the connecting walls respectively connected to the two opposite sides in the length direction, one of the connecting walls is the impact adjuster receiving portion, and the other connecting wall is the valve stem receiving portion. [0003] In the rocker arm made of sheet metal, by rotating the cam in contact with the roller, the main body is rocked with the shock adjuster receiving part as a fulcrum, and the valve is opened by moving the valve stem up and down on the valve stem receiving part. Close (for example, with reference to Japanese Patent Application Laid-Open No. 6-74004). [0004] The sliding contact surface bet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/047F01L1/18F01L3/02
CPCF01L2105/02F01L3/04F01L2101/00F01L1/185F01L2103/00Y10S148/003C21D2211/001F01L2301/00F01L2303/00F01L2305/02Y10T29/49295Y10T74/20882Y10T74/2107
Inventor 本桥信纲
Owner KOYO SEIKO CO LTD
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