CN102128063A

CN102128063A - Integral air inlet rocker arm

Info

Publication number: CN102128063A
Application number: CN 201110066449
Authority: CN
Inventors: 许骞; 王岳宇; 舒明星; 郑素芳
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2011-03-19
Filing date: 2011-03-19
Publication date: 2011-07-20

Abstract

The invention provides an integral air inlet rocker arm which is in a whole forging structure; and a contact surface between the upper front end of a rocker arm body and a cam shaft is provided with a chromium-plating layer with the thickness of 0.03-0.05mm. The original insert layer is omitted, and the air inlet rocker arm is changed into a whole structure from the original two-layer structure; and a whole machine is adopted to be matched with the chromium-plating technique, so that the requirements of structural strength and wear resistance can be met, the technique is simplified as much as possible, and the cost pressure and the risk of falling off of a welding side caused by the insert technique can be avoided.

Description

A kind of integral type intake rocker

Technical field

The present invention relates to a kind of engine part, specifically, relate to the intake rocker structure.

Background technique

In traditional motor, the valve that admission cam shaft is adjusted motor by intake rocker opens and closes.Because the rotating speed of motor is very high, petrol engine especially, rotating speed can reach more than the 5000 commentaries on classics/m usually, so motor requires very high to the wear resistance of intake rocker.In the motor that adopts rocker structure, especially the above motor of 1.2L, be subjected to the restriction of wear resistance, referring to Fig. 2 and Fig. 3, it (is that rocking arm body A is a stainless steel lining that common intake rocker has all adopted double-layer structure, add that layer B that insert is integral by solder bond), layer B that insert adopts powder metallurgy structure (front end and camshaft surface of contact welding powder metallurgy structure on body), the wear resistance of this structure is better, but be subjected to the restriction of the means of welding, the layer of inserting easily drops, and causes engine abnormal noise, quality problems such as camshaft locking, and its welding procedure and material (welding consumables adopts silver more, precious metals such as platinum) cost is higher.

Summary of the invention

Technical problem to be solved by this invention provides a kind of integral type intake rocker, and it can satisfy the wear resistance requirement, and avoided the inserting risk, the cost that come off are lower.

The integral type intake rocker that the present invention proposes is the solid forging structure, and its surface of contact position of front end and camshaft on the rocking arm body has one deck and crosses the chromium layer.Crossing the chromium layer thickness is 0.03-0.05mm.

The present invention has cancelled original layer of inserting, intake rocker is by original double-layer structure, changed overall structure into, adopted whole machine to add the technology that cooperates chromium plating, structural strength and wear resistance requirement have promptly been satisfied, the simplification of can on technology, trying one's best again, cost pressure that the technology of having avoided inserting is brought and the welding edge risk that comes off.

The invention has the advantages that:

(1) cost is low: cancelled expensive powdered metallurgical material and welding consumables, replaced with common stainless steel structure.

(2) technology is simple: cancelled original welding procedure (separate unit is manual, complicated operation), adopted whole chromium plating (machinery is simple to operate in batches).

(3) wear resistance is enough to satisfy user demand: chromium plating can substitute original powder metallurgy structure and play the abrasionproof effect, and by test, the wearing and tearing of the two are suitable.

Description of drawings

Fig. 1 is the schematic representation of integral type intake rocker;

Fig. 2 is the intake rocker structural drawing that original band is inserted;

The rocking arm bulk junction composition of the intake rocker structure that the original band of Fig. 3 is inserted.

Embodiment

Referring to Fig. 1, the present invention cancels the insert structure (B among Fig. 2) of original rocking arm; rocking arm body 1 adopts integrated type forging structure (the forging mode is with original the same); then the rocking arm body 1 of moulding is heat-treated; go out to adopt chromium plating to handle in its original insert site; form and cross chromium layer 2; thickness is between 0.03-0.05mm; this scope is optimum scope; can be not enough less than the 0.03mm wear resistance; come off greater than the easy layering of 0.05mm, has just formed integral type rocking arm of the present invention through after the reprocessing.

This intake rocker is easy to process, and technology is simple, can well protect the working life of rocking arm.

Claims

1. integral type intake rocker, it is characterized in that: described intake rocker is the solid forging structure, its surface of contact position of front end and camshaft on the rocking arm body has one deck and crosses the chromium layer.

2. integral type intake rocker according to claim 1 is characterized in that: it is characterized in that the described chromium layer thickness that crosses is 0.03-0.05mm.