CN103939163A - Variable valve rockshaft structure - Google Patents
Variable valve rockshaft structure Download PDFInfo
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- CN103939163A CN103939163A CN201410078997.2A CN201410078997A CN103939163A CN 103939163 A CN103939163 A CN 103939163A CN 201410078997 A CN201410078997 A CN 201410078997A CN 103939163 A CN103939163 A CN 103939163A
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- oil
- tube
- different shapes
- steel tubing
- oil outlet
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Abstract
The invention relates to a variable valve rockshaft structure, and belongs to the technical field of engine manufacturing. The variable valve rockshaft structure comprises a shaft body which is formed by combining an outer straight round tube and an inner special-shaped tube, a first tube cavity serving as a lubricating oil cavity is formed by separating the round tube and the inner special-shaped tube in the axial middle in a defined mode, a second tube cavity serving as a power oil cavity is formed in the axial middle of the special-shaped tube, a row of first oil outlets and a row of second oil outlets are formed at intervals in the outer circumferential face of the shaft body in the length direction, the first oil outlets are communicated with the first tube cavity, the second oil outlets are communicated with the second tube cavity, lubricating oil in the first tube cavity is jetted outwards through the first oil outlets, and power oil in the second tube cavity is jetted outwards through the second oil outlets. The variable valve rockshaft structure has the advantages that the lubricating oil tube and the power oil tube are combined into a whole and can be machined without casting or punching, the manufacturing cost is low, pipeline layout of an automobile engine is simplified, vibration and noise pollution of the engine are reduced, and the mass of an whole automobile is reduced.
Description
Technical field
The invention belongs to engine manufacturing technology field, be specifically related to a kind of changeable air valve Rocker arm shaft structure.
Background technique
At the English full name of VTEC(: Variable Valve Timing and Valve Life Electronic Control System, Chinese: changeable air valve port timing and valve lift electronic control system) in the project organization of motor car engine, valve rocker is assembled on cylinder head, and it is made up of rocking arm, pitman arm shaft, rocker arm shaft support and spring etc.Changeable air valve rocking arm coordinates opening/closing time and the lift of single cam structure with control engine valve.Except pair of cams and a pair of rocking arm of two valves of original control, this project organization has increased a higher intermediate cam and corresponding rocking arm.The small piston being moved by hydraulic control is equipped with in three rocking arm inside.When low engine speed, small piston is gone up in situ, three sub rocker arms from, two cams promote respectively corresponding two rocking arms, control the switching of two intake valves, and valve lift is less, although intermediate cam also promotes intermediate rockers, but owing to separating between rocking arm, other two rocking arm is not subject to its control, therefore can not affect the open and-shut mode of valve; But in the time that motor reaches the high rotating speed of a certain setting, motor can pass through solenoid valve primer fluid pressing system, the small piston promoting in rocking arm is connected three rocking arms, driven by intermediate cam.Because intermediate cam is higher than other cam, lift is large, so IO Intake Valve Opens time lengthening, lift increases thereupon; In the time that engine speed is reduced to the slow-speed of revolution of a certain setting, the hydraulic pressure in rocking arm also decreases, and piston is return original position under return spring effect, and three rocking arms separately.
Current rocker arm shaft of automobile engine is all only provided with an oil duct that confession is lubricated conventionally; pitman arm shaft body adopts the steel pipe of hollow mostly, and hollow parts can directly be made lubricating oil path and use, and processing is simple; not limited by processing technology, move required oil circuit requirement but be difficult to meet motor; Part pitman arm shaft adopts two steel pipes to carry respectively lubricant oil and power oil, this independently two Steel Pipe Designs can cause the complicated of engine tube line structure, and engine oil amount is wayward, easily aggravates vehicle vibrations, make noise become large, and complete vehicle quality also can increase.For above-mentioned existing problems, Chinese utility model patent notice of authorization CN202810987U, " a kind of pitman arm shaft of motor " disclosed, in its pitman arm shaft, there is oil leab and pressure oil duct simultaneously, but this pitman arm shaft is to be made by techniques such as casting, punching presses, processed complex, process step is many, manufacturing efficiency is low, difficult quality guarantee.
In view of above-mentioned prior art, be necessary the structure of existing changeable air valve pitman arm shaft to be improved, for this reason, the applicant has done useful design, and technological scheme described below produces under this background.
Summary of the invention
The object of the present invention is to provide a kind of compact structure, can simplify engine oil path layout, be convenient to control oil mass, alleviate quality, simultaneously the convenient changeable air valve Rocker arm shaft structure of processing, greatly enhancing productivity.
The object of the invention is to reach like this, a kind of changeable air valve Rocker arm shaft structure, it is characterized in that: comprise an axle body, described axle body is composited by the steel tubing in different shapes of outer field straight pipe and internal layer, described straight pipe becomes to have the first tube chamber as lubricant reservoir with described steel tubing in different shapes at axially middle enclosure, described steel tubing in different shapes forms the second tube chamber of the useful oil pocket that is used as power in the middle of axially, described axle body is spaced apart first oil outlet and a row second oil outlet for described second tube chamber communicate of a row for communicating with the first described tube chamber that be provided with on outer circumferential face and along its length, the first described intraluminal lubricant oil outwards sprays by the first described oil outlet, power oil in the second described tube chamber outwards sprays by the second described oil outlet.
In a specific embodiment of the present invention, the radial cross section of described steel tubing in different shapes is crescent shape.
In another specific embodiment of the present invention, the diameter of the first described oil outlet is 2～3mm, is preferably 2.5mm.
In another specific embodiment of the present invention, the diameter of the second described oil outlet is 3.5～4.5mm, is preferably 4mm.
In another specific embodiment of the present invention, described straight pipe and described steel tubing in different shapes adopt the compound rear aligning of cold-drawn, then are picked the tube wall of the steel tubing in different shapes of the tube wall of outer field straight pipe and internal layer is fitted tightly and is integrally formed in contact position by Hydraulic Expansion.
The present invention adopts sheathed two pipelines that are integrated to carry respectively lubricant oil and power oil, compared with prior art, the beneficial effect having: in meeting engine oil path requirement, simplified the oil circuit of motor and arranged, reduce engine vibration and noise pollution, alleviated complete vehicle quality; The quantity that can open according to different automobile gears different the first oil outlet and the second oil outlet, has realized the effective control to fuel delivery; Processing and fabricating is simple, convenient, and manufacturing efficiency is high, can ensure quality of processing.
Brief description of the drawings
Fig. 1 is the radial cross-section of one embodiment of the invention.
Fig. 2 is perspective view of an embodiment of the present invention.
In figure: 1. axle body, 11. straight pipes, 12. steel tubing in different shapess, 13. first tube chambers, 14. second tube chambers, 15. first oil outlets, 16. second oil outlets.
Embodiment
In order to make the public can fully understand technical spirit of the present invention and beneficial effect; claimant will describe in detail the specific embodiment of the present invention below by reference to the accompanying drawings; but claimant is not the restriction to technological scheme to embodiment's description, anyly changes in the form rather than substance and all should be considered as protection scope of the present invention according to the present invention design.
Refer to Fig. 1 and Fig. 2, the present invention relates to a kind of changeable air valve Rocker arm shaft structure, comprise an axle body 1, described axle body 1 is composited by the steel tubing in different shapes 12 of outer field straight pipe 11 and internal layer, in the present embodiment, the radial cross section of described steel tubing in different shapes 12 is crescent shape.Described straight pipe 11 becomes to have the first tube chamber 13 as lubricant reservoir with described steel tubing in different shapes 12 at axially middle enclosure, and described steel tubing in different shapes 12 forms the second tube chamber 14 of the useful oil pocket that is used as power in the middle of axially.Preferably, the production process of described straight pipe 11 specifically comprises the steps: lubricate → cold rolling → bright heat treatment → aligning of lubricate → cold-drawn → heat treatment → pickling → phosphatization of pipe inspection → blanking → centering → heating → perforation → hollow forging inspection → pickling → phosphatization; The production process of described steel tubing in different shapes 12 specifically comprises the steps: lubricate → cold-drawn → heat treatment → special-shaped mould draw → bright heat treatment → aligning of pipe inspection → blanking → centering → heating → perforation → hollow forging inspection → pickling → phosphatization.Described straight pipe 11 adopts the compound rear aligning of cold-drawn with described steel tubing in different shapes 12, pick the tube wall of the steel tubing in different shapes of the tube wall of outer field straight pipe 11 and internal layer 12 is fitted tightly and is integrally formed in contact position by Hydraulic Expansion again, thereby ensure follow-up polishing, boring and long-time in warm nitriding treatment process, medium between the first tube chamber 13 and the second tube chamber 14 is not connected, anisobaric, can work independently.Described axle body 1 is spaced apart first oil outlet 15 and a row second oil outlet 16 for described second tube chamber 14 communicate of a row for communicating with the first described tube chamber 13 that be provided with on outer circumferential face and along its length, lubricant oil in the first described tube chamber 13 outwards sprays by the first described oil outlet 15, and the power oil in the second described tube chamber 14 outwards sprays by the second described oil outlet 16.The diameter of the first described oil outlet 15 is 2～3mm, is preferably in the present embodiment 2.5mm; The diameter of the second described oil outlet 16 is 3.5～4.5mm, is preferably in the present embodiment 4mm.Open the first different oil outlets 13 and the quantity of the second oil outlet 14 according to different automobile gears, can realize the effective control to fuel delivery.
The present invention is complex as a whole lubricant pipe and power oil pipe, therefore can process without casting, punching press, and fabricating cost is low, and has simplified the line arrangement of motor car engine, has reduced engine vibration and noise pollution, has alleviated complete vehicle quality.
Claims (5)
1.
a kind of changeable air valve Rocker arm shaft structure, it is characterized in that: comprise an axle body (1), described axle body (1) is composited by the steel tubing in different shapes (12) of outer field straight pipe (11) and internal layer, described straight pipe (11) becomes to have the first tube chamber (13) as lubricant reservoir with described steel tubing in different shapes (12) at axially middle enclosure, described steel tubing in different shapes (12) forms second tube chamber (14) of the useful oil pocket that is used as power in the middle of axially, described axle body (1) is spaced apart first oil outlet (15) and a row second oil outlet (16) for described second tube chamber (14) communicate of a row for communicating with described the first tube chamber (13) that be provided with on outer circumferential face and along its length, lubricant oil in described the first tube chamber (13) outwards sprays by described the first oil outlet (15), power oil in described the second tube chamber (14) outwards sprays by described the second oil outlet (16).
2.
changeable air valve Rocker arm shaft structure according to claim 1, is characterized in that the radial cross section of described steel tubing in different shapes (12) is crescent shape.
3.
changeable air valve Rocker arm shaft structure according to claim 1, is characterized in that the diameter of described the first oil outlet (13) is 2～3mm, is preferably 2.5mm.
4.
changeable air valve Rocker arm shaft structure according to claim 1, is characterized in that the diameter of described the second oil outlet (14) is 3.5～4.5mm, is preferably 4mm.
5.
changeable air valve Rocker arm shaft structure according to claim 1, it is characterized in that described straight pipe (11) and described steel tubing in different shapes (12) adopt the compound rear aligning of cold-drawn, then pick the tube wall of the steel tubing in different shapes (12) of the tube wall of outer field straight pipe (11) and internal layer is fitted tightly and is integrally formed in contact position by Hydraulic Expansion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410078997.2A CN103939163A (en) | 2014-03-06 | 2014-03-06 | Variable valve rockshaft structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410078997.2A CN103939163A (en) | 2014-03-06 | 2014-03-06 | Variable valve rockshaft structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103939163A true CN103939163A (en) | 2014-07-23 |
Family
ID=51187007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410078997.2A Pending CN103939163A (en) | 2014-03-06 | 2014-03-06 | Variable valve rockshaft structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103939163A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112719801A (en) * | 2020-12-21 | 2021-04-30 | 常熟市无缝钢管有限公司 | Three-way composite special-shaped steel pipe and machining method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08150412A (en) * | 1994-11-28 | 1996-06-11 | Sankin Kk | Tube having inside parting wall and its manufacture |
| CN1590716A (en) * | 2003-06-12 | 2005-03-09 | 三菱自动车工业株式会社 | Rocker shaft |
| CN203730085U (en) * | 2014-03-06 | 2014-07-23 | 常熟市无缝钢管有限公司 | Rocker arm shaft structure of variable valve |
-
2014
- 2014-03-06 CN CN201410078997.2A patent/CN103939163A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08150412A (en) * | 1994-11-28 | 1996-06-11 | Sankin Kk | Tube having inside parting wall and its manufacture |
| CN1590716A (en) * | 2003-06-12 | 2005-03-09 | 三菱自动车工业株式会社 | Rocker shaft |
| CN203730085U (en) * | 2014-03-06 | 2014-07-23 | 常熟市无缝钢管有限公司 | Rocker arm shaft structure of variable valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112719801A (en) * | 2020-12-21 | 2021-04-30 | 常熟市无缝钢管有限公司 | Three-way composite special-shaped steel pipe and machining method thereof |
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| PB01 | Publication | ||
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Application publication date: 20140723 |