JPH0446280U

JPH0446280U -

Info

Publication number: JPH0446280U
Application number: JP8907090U
Authority: JP
Priority date: 1990-08-24
Filing date: 1990-08-24
Publication date: 1992-04-20

Description

[Brief explanation of the drawing]

第１図〜第１０図は本考案の実施例を示し、第
１図は内燃機関のシリンダヘツド部に適用した第
一実施例を示す半縦断面図、第２図は同実施例の
溝を示す拡大断面図、第３図は同実施例の溝を構
成するかき上げ面とかき下げ面の角度を示す拡大
断面図、第４図は第二実施例に係るバルブステム
の半正面図、第５図は第４図Ａ−Ａ線における断
面図、第６図は第三実施例に係るバルブステムを
示す半正面図、第７図はバルブステムにリング装
着した第四実施例を示す半断面図、第８図は同実
施例のリングに形成したかき上げ面とかき下げ面
の角度を示す拡大半断面図、第９図はバルブガイ
ド側に溝を設けた第五実施例を示す半断面図、第
１０図は軸孔の内周面に油供給溝を設けた第六実
施例を示す半断面図、第１１図は従来のバルブの
構成例を示す半縦断面図である。符号の説明、１……バルブ、２……シリンダヘ
ツド、３……軸孔、４……バルブガイド、５……
ヘツド、６……バルブステム、７……通路、８…
…オイルシール（パツキン）、９，１３，１４，
１９……溝、１０，１７，２０……かき上げ面、
１１，１８，２１……かき下げ面、１２……弁座
、１５……取付溝、１６……リング、２２……油
供給溝、θ_１……かき上げ面の角度、θ_２……か
き下げ面の角度。 Figures 1 to 10 show embodiments of the present invention, with Figure 1 being a half-longitudinal sectional view showing the first embodiment applied to the cylinder head of an internal combustion engine, and Figure 2 showing the grooves of the same embodiment. FIG. 3 is an enlarged sectional view showing the angle between the raised surface and the lowered surface constituting the groove of the same embodiment. FIG. 4 is a half front view of the valve stem according to the second embodiment. 5 is a sectional view taken along the line A-A in FIG. 4, FIG. 6 is a half front view showing a valve stem according to the third embodiment, and FIG. 7 is a half cross section showing a fourth embodiment in which a ring is attached to the valve stem. 8 is an enlarged half-sectional view showing the angle between the raised surface and the lowered surface formed on the ring of the same embodiment, and FIG. 9 is a half-sectional view showing the fifth embodiment in which a groove is provided on the valve guide side. 10 is a half-sectional view showing a sixth embodiment in which an oil supply groove is provided on the inner peripheral surface of the shaft hole, and FIG. 11 is a half-longitudinal sectional view showing an example of the configuration of a conventional valve. Explanation of symbols, 1...Valve, 2...Cylinder head, 3...Shaft hole, 4...Valve guide, 5...
Head, 6... Valve stem, 7... Passage, 8...
...Oil seal (packet), 9, 13, 14,
19...groove, 10,17,20...raking surface,
11, 18, 21... Scraping surface, 12... Valve seat, 15... Mounting groove, 16... Ring, 22... Oil supply groove, θ ₁ ... Angle of scraping surface, θ ₂ ... Scraping The angle of the lower surface.

Claims

[Claims for Utility Model Registration] (1) A valve guide having a shaft hole along the vertical direction is provided, a valve stem is inserted into the shaft hole in a reciprocating manner, and the valve stem is located below the shaft hole. In this valve, a gasket is provided at a position facing a passage of fluid flowing through the valve stem, and lubricating oil is supplied from above the shaft hole when the valve stem is activated, and a gasket is provided on the outer circumferential surface of the valve stem against the outer circumferential surface. A groove is formed with a raised surface and a lowered surface arranged in the axial direction at a predetermined angle, and the angle of the raised surface with respect to the outer circumferential surface of the valve stem is adjusted to the lowered surface with respect to the outer circumferential surface of the valve stem. A valve characterized by being set larger than the angle of. (2) The valve according to claim 1, wherein the groove is discontinuously provided on the outer peripheral surface of the valve stem along the circumferential direction. (3) The valve according to claim 2, wherein the discontinuous grooves are randomly arranged. (4) The valve according to claim 2, wherein the raised surface and the lowered surface are curved surfaces. (5) A valve guide having a shaft hole along the vertical direction is provided, a valve stem is inserted into the shaft hole so as to be able to reciprocate, and a passage for fluid that flows under the shaft hole by the operation of the valve stem is provided. In a valve in which a packing is provided at a position facing the shaft hole, and lubricating oil is supplied from above the shaft hole when the valve stem is operated, the outer peripheral surface of the valve stem is formed at a predetermined angle with respect to the inner peripheral surface of the shaft hole. A ring having a raised surface and a lowered surface arranged in the axial direction is installed, and the angle of the raised surface with respect to the inner circumferential surface of the shaft hole is adjusted to the angle of the lowered surface with respect to the inner circumferential surface of the shaft hole. A valve that is characterized by being set larger than the actual size. (6) A valve guide having a shaft hole along the vertical direction is provided, a valve stem is inserted into this shaft hole so as to be able to reciprocate, and a passage for fluid that flows under the shaft hole by the operation of the valve stem is provided. In this valve, a gasket is provided at a position facing the shaft hole, and lubricating oil is supplied from above the shaft hole when the valve stem is operated. a groove having a raised surface and a lowered surface disposed in the axial direction, and the angle of the raised surface with respect to the inner peripheral surface of the shaft hole is set to be smaller than the angle of the lowered surface with respect to the inner peripheral surface of the shaft hole. A valve characterized by its large setting.