CN202266340U

CN202266340U - Engine air cylinder head structure

Info

Publication number: CN202266340U
Application number: CN201120408809XU
Authority: CN
Inventors: 尤志文; 费德强; 褚润生
Original assignee: Sanyang Industry Co Ltd
Current assignee: Sanyang Industry Co Ltd
Priority date: 2011-10-24
Filing date: 2011-10-24
Publication date: 2012-06-06
Anticipated expiration: 2021-10-24

Abstract

The utility model relates to an engine air cylinder head structure, which comprises an air cylinder head main body and a camshaft seat. The air cylinder head is provided with a camshaft chamber, a transmission element cavity, an extension cavity and a combustion chamber, wherein the extension cavity and the combustion chamber are arranged at two opposite sides of a combustion chamber wall. The camshaft seat is fixed on the air cylinder head main body, a supporting part of the camshaft seat is provided with a first supporting hole and a communication pore canal which is arranged below the first supporting hole. The extension cavity is directly communicated with the camshaft chamber, and the extension cavity is communicated with the transmission element cavity through the communication bore canal. Lubricant from the camshaft chamber can cool the wall of the combustion chamber and also can be recycled, so the problems of the present engine combustion chamber that the ambient temperature is non-uniform and the temperature difference is large can be solved, and the service life of components can be prolonged. The locking deformation of the camshaft seat can be reduced, so the service life loss of a bearing of the camshaft can be reduced.

Description

Cylinder head structure of engine

Technical field

The utility model relates to a kind of cylinder head structure of engine, refers to a kind of cylinder head structure of engine that more evenly cools off effect that reaches especially.

Background technique

The purpose of engine cooling system is to avoid engine overheated and damage, or avoids working efficiency to reduce.Cooling system can generally be divided into air cooling system, oil cooling system and constituent; Perhaps be above hybrid; Air cooling system is around engine, to flow to take away heat by air; The oil cooling system be lube oil cooler elder generation cutting oil so that by lubricant oil in the engine internal circulation to take away heat, constituent then is to utilize water and freezing mixture mobile to take away heat in the engine water jacket.

With reference to figure 1～3, be the stereogram and a sectional view of first two different visual angles of engine cylinder of convention natural air cooling.The cylinder head of a convention engine shown in the figure mainly comprises a cylinder head body 90 and a camshaft holder, and wherein camshaft holder is to be made up of opposed one first supporting portion 91a and one second supporting portion 91b.

Cylinder head body 90 defines a camshaft chest 97, a firing chamber 94 and a driving component chamber 92; Camshaft chest 97 cam mechanism 95 of accommodating above-mentioned camshaft holder and being erected at camshaft holder wherein; Firing chamber 94 is the fuel oil of mixing and the place that air inlet receives a spark plug 98 igniting and then combustion process takes place; Driving component chamber 92 contains a driving component 96, and driving component 96 is installed in cam mechanism 95 and rotates synchronously.

Cylinder head body 90 rings have roughly been distinguished four sides in week, are in regular turn: spark plug side 901, exhaust side 902, driving component chamber side 903, air inlet side 904.Spark plug side 901 is concaved with an airflow path S, and this airflow path S reaches chamber, the outside wall of driving component chamber 92 deeply, and a chamber wall 93 two opposite sides of cylinder head body 90 are respectively firing chamber 94 and aforementioned airflow path S.Chamber wall 93 also offers a mounting hole 931 and supplies spark plug 98 to install and fix.

Exhaust side 902 is port mouth one side of air outlet flue, and air inlet side 904 is port mouth one side of intake duct, and 903 of driving component chamber side are driving component chamber 92 places one sides.

Under the Structure of cylinder head design of convention natural air cooling; There is a problem; Be to be prone to the situation that has local temperature too high around the firing chamber 94; Because the engine cooling blast branches to spark plug side 901 and driving component chamber side 903 towards exhaust side 902 and at cylinder head body 90,, this air-flow is not flowed directly to airflow path S and having suitable path.

Therefore, the Structure of cylinder head that is necessary a kind of improvement is provided promotes the Endurance life of engine by this to solve above-mentioned local superheating problem.

The model utility content

The main purpose of the utility model is that a kind of cylinder head structure of engine is being provided, reducing the situation of the local long-pending heat of engine, and bearing working life of lift cam axle simultaneously.

For reaching above-mentioned purpose, the cylinder head structure of engine of the utility model comprises a cylinder head body and a camshaft holder.

The cylinder head body defining has a firing chamber, to extend chamber, a camshaft chest and a driving component chamber.In addition, the cylinder head body also includes a chamber wall.

Above-mentioned camshaft holder is to be fixed in the cylinder head body.Camshaft holder comprises opposed one first supporting portion and one second supporting portion, and offers one first supported hole and a connected pore channel, and wherein the connected pore channel is positioned at first supported hole below.

Especially, above-mentioned extension chamber and firing chamber are adjacent to the two opposite sides of chamber wall respectively, and extend chamber and be directly with camshaft chest and be communicated with.Extend chamber and be communicated to the driving component chamber through the connected pore channel.

Above-mentioned first supporting portion can include two bolt ducts, and the connected pore channel is arranged between the two bolt ducts.

In the cylinder head structure of engine of the utility model, cylinder head body and camshaft holder can be integral structure or separate type.

Camshaft holder can be equipped with a cam mechanism, and cam mechanism includes at least one valve actuation cam.

The driving component that the driving component chamber is accommodated can be a sprocket wheel, and it is to be fixed in cam mechanism, refers in particular to its camshaft.

This external surface of cylinder head can have a fin structure to strengthen engine integral heat sink effect.

The extension chamber of cylinder head body can have a skew wall face, with the lubricant oil area of contact of expansion from the camshaft chest inflow, and then promotes cooling action.The skew wall face more can interlink with chamber wall.

The utility model has the advantages that:, after the indoor related components of camshaft lubrication, partly can directly flow into the extension chamber downwards and arrive at chamber wall when flow of lubricant to camshaft chest by the said structure design.Therefore can obtain suitable the cooling near the firing chamber, improve that convention engine combustion chamber environment temperature is inhomogeneous, the problem of excessive temperature differentials, promote part life.In addition; The setting of the connected pore channel of camshaft holder is except the recovery approach that the indoor cutting oil of extended cavity is provided advances to the driving component chamber; Also brought into play the less effect of amount of deformation that lets the supported hole of camshaft holder after locking step, produce, the bearing life loss of camshaft is reduced.

Description of drawings

Fig. 1 is a convention engine cylinder head stereogram.

Fig. 2 is the engine cylinder head different visual angles stereogram of Fig. 1.

Fig. 3 is a convention engine cylinder head sectional view.

Fig. 4 is the engine cylinder head stereogram of the utility model one preferred embodiment.

Fig. 5 is the engine cylinder head different visual angles stereogram of Fig. 4.

Fig. 6 is the engine cylinder head sectional view of the utility model one preferred embodiment.

The primary component symbol description

Cylinder head body 90 spark plug sides 901

Air inlet side 902 driving component chamber side 903

Exhaust side 904 first supporting portion 91a

The second supporting portion 91b driving component chamber 92

Chamber wall 93 mounting holes 931

Firing chamber 94 cam mechanisms 95

Driving component 96 camshaft chests 97

Spark plug 98 airflow path S

Cylinder head body 11 spark plug sides 111

Exhaust side 112 driving component chamber side 113

Air inlet side 114 chamber walls 115

Mounting hole 116 camshaft chests 12

Driving component chamber 13 extends chamber 14

Skew wall face 141 firing chambers 15

Fin structure 16 camshaft holders 20

First supporting portion, 21 first supported holes 210

211 bolt ducts 212,213,221,222, connected pore channel

Second supporting portion, 22 second supported holes 220

Cam mechanism 30 sprocket wheels 31

Spark plug 32 valve actuation cams 33

Camshaft 34 bearings 35,36

Rocking arm 37

Embodiment

With reference to figure 4～6, be stereogram and the sectional view of the engine cylinder head of a preferred embodiment in two kinds of different visual angles.Be the cylinder head part of an air-cooled car engine shown in the figure, be in particular one or four valve engines.The engine cylinder head mainly comprises a cylinder head body 11 and a camshaft holder 20.Cylinder head body 11 roughly is quadrilateral, and outer surface is formed with the fin structure 16 that helps the engine heat radiation.Cylinder head body 11 defines a camshaft chest 12 and a driving component chamber 13.

Cylinder head body 11 is formed with one and extends a chamber 14 and a firing chamber 15, and especially, this two chamber is upside and the downside that is adjacent to a chamber wall 115 of cylinder head body 11 respectively.Chamber wall 115 also offers a mounting hole 116, and mounting hole 116 is installed with a spark plug 32, and spark plug 32 extend in the firing chamber 15.

Camshaft holder 20 is in order to support a cam mechanism 30.Camshaft holder 20 is fixed in cylinder head body 11, and particularly it mainly is made up of one first supporting portion 21 and one second supporting portion 22, and first supporting portion 21 is coaxial opposed with one second supporting portion 22; And each supporting portion 21; 22 all offer a supported hole 210,220 and the vertical two bolt ducts 212,213 that connect; 221,222.First supported hole 210 is positioned between the two bolt ducts 212,213, and second supported hole 220 is positioned between the two bolt ducts 221,222.

Cam mechanism 30 main bodys are a camshaft 34, on camshaft 34, also are provided with a plurality of valve actuation cams 33 and are used for the corresponding rocking arm 37 of ejection.Camshaft 34 is supported on two supporting portions 21,22 through being flush-mounted in the two bearings 35,36 of above-mentioned first supported hole 210 and second supported hole 220.

Be defined as spark plug side 111, exhaust side 112, driving component chamber side 113 and air inlet side 114 around the cylinder head body 11 in regular turn.Spark plug side 111 is a sunk structure, is mainly used in to put spark plug 32 and as a cooling blast runner.Mounting hole 116 1 end openings are towards above-mentioned sunk structure, just with the exterior of cylinder head body 11.Exhaust side 112 mainly is that the Bu Kou of air outlet flue belongs to a side, and air inlet side 114 is for the Bu Kou of intake duct belongs to a side, and 113 of driving component chamber side are driving component chamber 13 places one sides.Driving component chamber 13 is accommodated a sprocket wheel 31 as the driving component that the bent axle transmission of power is arrived cam mechanism 30 in this example, and sprocket wheel 31 is fixed on the camshaft 34 of cam mechanism 30, and rotates synchronously.

In addition, especially, first supporting portion 21 also offers a connected pore channel 211 under first supported hole 210, equally between 212,213 scopes of two bolt ducts.

From the above; After the lubricant oil from oil groove arrives at camshaft chest 12 and the part in it is lubricated; Parts of lubricating oil can drop onto extends chamber 14; Particularly flow through chamber wall 115, just utilize the oil cooling mode to reduce the temperature of firing chamber 15 periphery, then engine cylinder head reason different parts excessive temperature differentials and cause gross distortion, element damage fault not.Extend chamber 14 and can have a skew wall face 141, and skew wall face 141 interlinks with chamber wall 115, flow to chamber wall 115 more easily, and the area of contact that enlarges lubricant oil is transmitted the heat of coming to help cooling by the firing chamber to help lubricant oil.

Lubricant oil more can get into driving component chamber 13 via connected pore channel 211 after having cooled off chamber wall 115.Driving component chamber 13 itself has the oil circuit design that makes lubricant oil reach the recovery purpose, because this belongs to known techniques, repeats no more in this.

The advantage of the Structure of cylinder head of the utility model is except utilizing lubricant oil cooling combustion locular wall to solve the too high problem of engine local temperature; When with bolt passing through bolt hole road 212; 213 during with the cylinder head that locks, cylinder block and crankcase; Because the connected pore channel 211 of first supported hole, 210 belows provides a buffer space, the bulk deformation amount of first supported hole 210 can reduce, and is very helpful for keeping of 35 life-spans of bearing.In the design of convention camshaft holder, the strength folder is urgent up and down because of receiving simultaneously during locking, and is easy to make element to lock distortion.

Claims

1. cylinder head structure of engine is characterized in that comprising:

One cylinder head body includes a chamber wall, and extends chamber, a firing chamber, a camshaft chest and a driving component chamber; And

One camshaft holder is to be fixed in this cylinder head body, comprises opposed one first supporting portion and one second supporting portion, and offers one first supported hole and be positioned at a connected pore channel of this first supported hole below;

Wherein, this extension chamber and this firing chamber are adjacent to the two opposite sides of this chamber wall respectively, and this extension chamber directly is communicated with this camshaft chest, and this extension chamber sees through this connected pore channel and is communicated to this driving component chamber.

2. cylinder head structure of engine as claimed in claim 1 is characterized in that this first supporting portion includes two bolt ducts, and this connected pore channel is between this two bolts duct.

3. cylinder head structure of engine as claimed in claim 1 is characterized in that this cylinder head body and this camshaft holder are integral structure.

4. cylinder head structure of engine as claimed in claim 1 is characterized in that this camshaft holder is equipped with a cam mechanism, and this cam mechanism includes at least one valve actuation cam.

5. cylinder head structure of engine as claimed in claim 4 is characterized in that this driving component chamber contains a sprocket wheel, is to be fixed in this cam mechanism.

6. cylinder head structure of engine as claimed in claim 1 is characterized in that this this external surface of cylinder head has a fin structure.

7. cylinder head structure of engine as claimed in claim 1 is characterized in that this extension chamber has a skew wall face, and this skew wall face and this chamber wall interlink.