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Tappet capable of offsetting valve clearance changes

A valve clearance and valve technology, which is applied to engine components, machines/engines, mechanical equipment, etc., can solve the problems of valve clearance changes, affecting engine reliability and safety, etc., so as to prevent valve clearance changes and improve reliability and safety sexual effect

Pending Publication Date: 2021-01-05
CHONGQING WEICHAI ENGINE FACTORY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the tappet 1 is connected to the follower 2, the tappet 1 will also move along the extension direction of the tappet 1, thereby pushing the valve to move, resulting in a change in the valve clearance
The change of valve clearance will seriously affect the reliability and safety of the engine.

Method used

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  • Tappet capable of offsetting valve clearance changes
  • Tappet capable of offsetting valve clearance changes
  • Tappet capable of offsetting valve clearance changes

Examples

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Embodiment Construction

[0017]The following describes the implementation of the present invention through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only illustrative to illustrate the basic concept of the present invention. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0018]Among them, the drawings are only used for exemplary description, and they are only schematic diagrams rather than physical drawings, and cannot be understood as a limi...

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Abstract

The invention relates to a tappet capable of offsetting valve clearance changes, and belongs to the field of engine valve adjusting devices. The tappet comprises a tappet body. One end of the tappet body is a match end. The end face of the match end is matched with a rolling wheel at one end of a valve timing adjusting mechanism. A rolling wheel at the other end of the valve timing adjusting mechanism moves on a valve cam. The end face of the match end is a fitting curved face. The distance from the tappet body to the axis of the valve cam is unchanged. The tappet body comprises a curved surface tappet rod. The fitting curved face is arranged at one end, close to the valve timing adjusting mechanism, of the curved surface tappet rod. A spherical surface base used for being connected with aspherical connector is arranged at the other end of the curved surface tappet rod. An oil return hole is formed in the curved surface tappet rod. The tappet can offset displacement generated in the tappet extending direction in the valve timing adjusting process, it is ensured that in the valve timing adjusting process, the valve clearance does not change, and reliability and safety of an engineare ensured.

Description

Technical field[0001]The invention belongs to the field of engine valve adjusting devices, and relates to a tappet for offsetting changes in valve clearance.Background technique[0002]In response to the application market's need for higher and higher working conditions in the low and mid-range and stricter emission regulations, mainstream engine design and manufacturing companies have successively launched high-power engines including variable valve technology. The traditional variable valve mechanism such asfigure 1 As shown, the valve timing adjustment mechanism includes an eccentric shaft group 5 and a follower 2. The follower 2 is provided with a roller 3, the roller 3 is overlapped on the camshaft 4, and the tappet 1 is connected to the follower through a ball seat Piece 2 on.[0003]When the valve timing is adjusted, the eccentric shaft group is adjusted by o0Turn to o1, The follower 2 drives the roller 3 to move on the camshaft 4. The initial contact point between the roller 3 a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/14
CPCF01L1/14
Inventor 郑小华贺晶史长平段艳强杨栋向本银和晓锋黄以兵
Owner CHONGQING WEICHAI ENGINE FACTORY
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