JPH036008U

JPH036008U -

Info

Publication number: JPH036008U
Application number: JP6572089U
Authority: JP
Priority date: 1989-06-05
Filing date: 1989-06-05
Publication date: 1991-01-22
Anticipated expiration: 2004-06-05
Also published as: JPH082404Y2

Description

[Brief explanation of the drawing]

第１〜５図はこの考案の実施例を示し、第１図
はロツカアームの要部拡大断面図、第２図は第４
図の−線断面図、第３図は第２図の概略側面
図、第４図はロツカアームの概略説明図、第５図
は内燃機関のシリンダヘツドの概略平面図である
。第６〜１２図はこの考案の従来の技術を示し、
第６図は第１の従来例を示すロツカアームの概略
側面図、第７図はロツカアームの軸受部位の概略
断面図、第８図は第２の従来例を示すロツカアー
ムの概略側面図、第９図はロツカアームの軸受部
位の概略断面図、第１０図は第３の従来例を示す
ロツカアームの概略側面図、第１１図はロツカア
ームの概略平面図、第１２図はロツカアームの軸
受部位の概略断面説明図である。図において、２……シリンダヘツド、４……カ
ムシヤフト、６……カム、８……ロツカシヤフト
、１０……第１ロツカアーム、１２……第２ロツ
カアーム、１４……押圧部、１６……軸受部、１
８……接触部、２０……揺動アーム部、２２……
段差部、２４……突出部、２６……境界部である
。 Figures 1 to 5 show an embodiment of this invention, with Figure 1 being an enlarged sectional view of the main part of the rocker arm, and Figure 2 being the
3 is a schematic side view of FIG. 2, FIG. 4 is a schematic explanatory view of the rocker arm, and FIG. 5 is a schematic plan view of the cylinder head of the internal combustion engine. Figures 6 to 12 show the conventional technology of this invention,
FIG. 6 is a schematic side view of a rocker arm showing a first conventional example, FIG. 7 is a schematic sectional view of a bearing part of the rocker arm, FIG. 8 is a schematic side view of a rocker arm showing a second conventional example, and FIG. 9 10 is a schematic side view of the rocker arm showing the third conventional example, FIG. 11 is a schematic plan view of the rocker arm, and FIG. 12 is a schematic sectional view of the rocker arm's bearing region. It is. In the figure, 2... cylinder head, 4... camshaft, 6... cam, 8... rocker shaft, 10... first rocker arm, 12... second rocker arm, 14... pressing part, 16... bearing part, 1
8...Contact part, 20...Swinging arm part, 22...
A step portion, 24...a protruding portion, and 26...a boundary portion.

Claims

[Scope of utility model registration request]

In a rocker arm of an internal combustion engine that opens and closes a valve body by converting the rotational force from a camshaft into a swinging motion, a bearing part is provided in the middle of the swinging arm part of the rocker arm, and the valve body is mounted on one end of the swinging arm part. A pressing part for pressing the valve stem of the body is provided to be curved in a desired direction, and a contact part for contacting the camshaft is provided on the other end side, and the bearing part is curved gradually so as to protrude maximum at the lower end part. 1. A rocker arm for an internal combustion engine, comprising a protrusion that protrudes in the direction and has a stepped portion at the inner circumferential portion of the lower end.