Cover structure of plug hole

摘要

A cover structure of a plug hole provided to a cylinder head cover of an engine includes: a plug cap detachably attached to the plug hole; an outer cover covering at least an upper side of the plug cap; and a seal member provided on an upper face of the cylinder head cover and surrounding a periphery of the plug hole. In the cover structure, the outer cover has a projection portion projected toward the cylinder head cover, and the seal member is pressed to the upper face of the cylinder head cover by the projection portion.

主权项

1. A cover structure of a plug hole of a cylinder head cover of an engine, the cover structure comprising:
a plug cap detachably attached to the plug hole; an outer cover covering at least an upper surface of the plug cap; and a seal member provided on an upper surface of the cylinder head cover and surrounding a periphery of the plug hole, wherein the outer cover has a projection portion projected toward the cylinder head cover, wherein the seal member is pressed to the upper surface of the cylinder head cover by the projection portion; wherein the projection portion is a first projection portion, wherein the outer cover further has a second projection portion located radially inside the first projection portion and projecting toward the cylinder head cover, wherein the seal member has a first convex portion and a second convex portion respectively facing the first projection portion and the second projection portion, wherein the plug cap has a disk portion enlarged in a radial direction, wherein the disk portion has a peripheral projection projecting downwardly at an outer circumferential edge thereof, and wherein the outer cover, the plug cap, and the seal member are configured such that, when the plug cap is attached to the plug hole:
(a) the peripheral projection is inserted between the first convex portion and the second convex portion,(b) the first projection portion presses the first convex portion downwardly, and(c) the second projection portion faces the second convex portion and substantially contacts with an upper surface of the disk portion.