JPH0359402U

JPH0359402U -

Info

Publication number: JPH0359402U
Application number: JP11924489U
Authority: JP
Priority date: 1989-10-13
Filing date: 1989-10-13
Publication date: 1991-06-12

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係るカムシヤフト
スラスト軸受装置およびその近傍の断面図、第２
図は第１図のうちカムキヤツプの底面図、第３図
は第２図のカムキヤツプの正面図、第４図はフロ
ント方向スラスト力作用時のカムシヤフトのスラ
スト軸受に対する相対位置を示す断面図、第５図
は第１図のうち常時のカムシヤフトのスラスト軸
受に対する相対位置を示す断面図、第６図は本考
案におけるカムシヤフト前後方向挙動およびカム
キヤツプ振動レベル図、第７図は従来のカムシヤ
フトにフロント方向スラスト力が作用したときの
断面図、第８図は従来のスラスト軸受構造におけ
る常時のカムシヤフトのスラスト軸受に対する相
対位置を示す断面図、第９図は従来スラスト構造
におけるカムシヤフト前後方向挙動およびカムキ
ヤツプ振動レベル図、である。１１……スラスト軸受、１２……シリンダヘツ
ド軸受部、１３……カムキヤツプ、１４……カム
シヤフト、１５，１６……フランジ、１７……フ
ロントスラスト受面、１８……リアスラスト受面
、２３……油溝、２３ａ……第１の溝部分、２３
ｂ……第２の溝部分、２３ｃ……第３の溝部分。 FIG. 1 is a sectional view of a camshaft thrust bearing device and its vicinity according to an embodiment of the present invention, and FIG.
The figure is a bottom view of the cam cap in Fig. 1, Fig. 3 is a front view of the cam cap in Fig. 2, Fig. 4 is a sectional view showing the relative position of the camshaft to the thrust bearing when front thrust force is applied, and Fig. 5 The figure is a cross-sectional view of Figure 1 showing the relative position of the camshaft with respect to the thrust bearing at all times, Figure 6 is a diagram of the longitudinal behavior of the camshaft in the present invention and the cam cap vibration level, and Figure 7 is the front thrust force applied to the conventional camshaft. 8 is a sectional view showing the relative position of the camshaft to the thrust bearing in a conventional thrust bearing structure, and FIG. 9 is a diagram of the longitudinal behavior of the camshaft and the vibration level of the cam cap in the conventional thrust bearing structure. It is. 11... Thrust bearing, 12... Cylinder head bearing portion, 13... Cam cap, 14... Camshaft, 15, 16... Flange, 17... Front thrust bearing surface, 18... Rear thrust bearing surface, 23... Oil groove, 23a...first groove portion, 23
b...Second groove portion, 23c...Third groove portion.

Claims

[Claims for Utility Model Registration] A thrust bearing consisting of a cylinder head and a cam cap and having a front thrust bearing surface and a rear thrust bearing surface on at least one side of the cylinder head and the cam cap is formed on the camshaft and spaced apart in the axial direction. A camshaft thrust bearing device that supports a camshaft in the axial direction by being located between two flanges and slidingly contacting the front and rear thrust bearing surfaces with the side surfaces of the flange via an oil film, which has front and rear thrust bearing surfaces. At least one of the cylinder head and the cam cap on the side has a first groove portion opened in the rear thrust receiving surface and a second groove portion extending to the vicinity of the front thrust receiving surface and not opened in the front thrust receiving surface.
A camshaft thrust bearing structure characterized in that: an oil groove having a groove portion is provided, and an oil supply hole for supplying oil to the oil groove is provided in a camshaft or a cylinder head.