CN203223305U - Air cylinder cover - Google Patents
Air cylinder cover Download PDFInfo
- Publication number
- CN203223305U CN203223305U CN 201320246472 CN201320246472U CN203223305U CN 203223305 U CN203223305 U CN 203223305U CN 201320246472 CN201320246472 CN 201320246472 CN 201320246472 U CN201320246472 U CN 201320246472U CN 203223305 U CN203223305 U CN 203223305U
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- China
- Prior art keywords
- circular arc
- tubular element
- cylinder head
- face
- rocker arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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- Valve-Gear Or Valve Arrangements (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model provides an air cylinder cover. The air cylinder cover is provided with a top surface, a bottom surface, an air inlet side surface, an air exhaust side surface, a front end surface and a back end surface. A camshaft installation base and a rocker arm support installation boss are distributed on the top surface. A through oil return channel is arranged between the front end surface and the back end surface. An arc-shaped tubular part is integrally cast in the air cylinder cover and communicated with the oil return channel, one end of the arc-shaped tubular part is opened on the rocker arm support installation boss, and the circle center of the arc-shaped tubular part coincides with the circle center of the shaft hole of the camshaft installation base. The air cylinder cover has the advantages of being simple in processing, high in precision, and good in cooling effect.
Description
Technical field
The utility model relates to engine art, is specifically related to a kind of circular arc tubular element that wherein is cast with as the cylinder head of oil leab.
Background technique
In the developing of automobile industry process, miniaturization, compactness how to realize motor is the target that the designer constantly pursues always.
In Chinese patent application number: in the patent of invention of 96192117.X, the applying date: 1996-10-16, denomination of invention " rocker arm assembly of internal-combustion engine ", a kind of internal-combustion engine is disclosed, valve rocker is installed on the cylinder head by rocker arm support, and when rocker arm support being installed being fastened on the cylinder cap, need cast out the rocker arm support installation base at cylinder cap.And, in order to provide lubricated to valve rocker, be provided with oil leab at rocker arm support and rocking arm support pads.
In Chinese patent application number: in the utility model patent of 201220401277.1, the applying date: 2012-8-14, denomination of invention " overhead camshaft cylinder cap ", further disclose the back oil road of cylinder head to the oil leab structure of rocker arm support installation base fuel feeding.Because the structure of motor is very compact, for the structures such as water jacket around dodging, back oil road can only be positioned at the below of camshaft fitting seat, and for consideration easy to process, the rocker arm support installation base adopts inclined oil hole of air and back oil road to connect.But inclined oil hole of air has also limited the further miniaturization of motor, has room for improvement.
In Chinese patent application number: in the application for a patent for invention of 201310134760.7, the applying date: 2013-4-18, denomination of invention " a kind of cylinder head and overhead camshaft engine ", the inventor proposes to utilize the first straight oilhole that begins to extend straight down from the rocker arm support installation base and begins the horizontally extending second straight oilhole from the air inlet side and is communicated with back oil road, replace the inclined oil hole of air that adopts usually, thereby realize the further miniaturization of motor.But, the first straight oilhole and the second straight oilhole form by machining, this just need experience in course of working from the boring of cylinder head top with from air inlet flank hole two procedures, twice boring of one side requirement on machining accuracy height, otherwise can cause two holes not to be communicated with makes cylinder head become waste product, even perhaps be communicated with but owing to two axially bored line antarafacials but not intersect the dislocation of two holes is communicated with, hinder fluid mobile to the rocker arm support installation base; On the other hand, still there is the space that to design water jacket near the intersection location place of two straight oilholes, exists further improved space.
The model utility content
The purpose of this utility model is to overcome above-mentioned shortcoming, thereby makes the processing of cylinder head simpler in the miniaturization that further realizes motor, provide bigger space to realize better cooling effect for the layout of cooling jacket.
For achieving the above object, the utility model provides following technological scheme:
A kind of cylinder head, described cylinder head has end face, bottom surface, air inlet side, exhaust side, front-end face and ear end face, be distributed with camshaft fitting seat and rocker arm support installation base on the described end face, the back oil road that has perforation between described front-end face and the described ear end face, integrally casting has the circular arc tubular element in the described cylinder head, described circular arc tubular element is communicated with described back oil road, and an end of described circular arc tubular element is in the upper shed of described rocker arm support installation base, and the center of circle of described circular arc tubular element overlaps with the center of circle of the axis hole of described camshaft fitting seat.
Preferably, have between the other end of described circular arc tubular element and the described air inlet side at interval.
Preferably, described interval location is distributed with the water jacket chamber.
Preferably, the outer wall of described circular arc tubular element has fin or sharp prominent.
The utility model is embedded in the circular arc tubular element in the mold in the casting process of cylinder head, thereby make the circular arc tubular element be cast in the oil circuit that forms in the cylinder head from the rocker arm support installation base to back oil road, need not to carry out again horizontal drilling and vertical drilling, saved operation, process simpler, and can guarantee oil circuit be connect and need not to consider the influence of the machining precision of holing.And, the center of circle of circular arc tubular element overlaps with the center of circle of the axis hole of camshaft fitting seat, make the profile line of whole circular arc tubular element all can tend to the cam rotating locus tangent, thereby can in the further miniaturization that realizes motor, improve cooling effect to greatest extent for arranging that the water jacket chamber provides the space.And the circular shape of tubular element is conducive to the casting material of cylinder head and the stress distribution between the tubular element, can not cause stress to concentrate.
Further, have between an end of circular arc tubular element and the air inlet side at interval, this has not only saved the operation of carrying out shutoff in the air inlet side, and for realizing that cylinder head jacket layout in a wider context provides the space.
Further, interval location is distributed with the water jacket chamber and can improves the water jacket cooling effect.
Further, the fin on the outer wall of circular arc tubular element or point are prominent can make the circular arc tubular element tightr with being connected of casting material.
Description of drawings
Next will be described in further detail specific embodiment of the utility model by reference to the accompanying drawings, wherein:
Fig. 1 is a kind of plan view of cylinder head of overhead camshaft engine;
Fig. 2 is the stereogram of embodiment's of the present utility model motor, and the part assembly on the motor is omitted;
Fig. 3 is the sectional view along the A-A line of Fig. 1, has shown the oil leab structure of prior art one;
Fig. 4 is the sectional view along the A-A line of Fig. 1 of similar Fig. 3, has shown the oil leab structure of prior art two;
Fig. 5 has schematically shown in the prior art two only partially communicating situation of the first straight oilhole and the second straight oilhole dislocation;
Fig. 6 is the plan view of embodiment's of the present utility model circular arc tubular element;
Fig. 7 is the sectional view along the A-A line of Fig. 1 of similar Fig. 3, has shown embodiment's of the present utility model oil leab structure;
Fig. 8 is the principle schematic that the utility model and prior art contrast.
Last figure mark explanation: end face 1, air inlet side 2, exhaust side 3, front-end face 4, ear end face 5, camshaft fitting seat 6, rocker arm support installation base 7, back oil road 8, inclined oil hole of air 9, the first straight oilhole 10, the second straight oilhole 11, water jacket chamber 12, camshaft 13, rocker arm support 14, bottom surface 15, intake rocker 16, intake valve 17, exhaust rocker arm 18, exhaust valve 19, circular arc tubular element 20, first end 21, second end 22, fin 23, axis hole 61.
Embodiment
In conjunction with Fig. 1 and Fig. 2, cylinder head has end face 1, towards cylinder block (not shown) and connected bottom surface 15, be distributed with suction port air inlet side 2, be distributed with the exhaust side 3 of relief opening, towards the front-end face 4 of timing train and the ear end face 5 relative with front-end face 4.It should be understood by one skilled in the art that front-end face 4 and ear end face 5 are location definitions of relative timing train, also can adopt other definition mode certainly, for example the definition position of front and rear end is exchanged.On end face 1, be distributed with camshaft fitting seat 6, and be distributed with rocker arm support installation base 7 in its vicinity.Camshaft 13 is installed in the axis hole 61 of camshaft fitting seat 6, and rocker arm support 14 is installed on the rocker arm support installation base 7, and intake rocker 16 and exhaust rocker arm 8 are installed on the rocker arm support 14.Camshaft 13 drives intake rocker 16 to drive a pair of intake valve 17 by rotation, and camshaft 13 drives exhaust rocker arm 18 to drive a pair of exhaust valve 19 simultaneously.Back oil road 8 begins to extend up to ear end face 5 from front-end face 4, thereby connects entire cylinder head between the front and rear end, as the part of cylinder lubrication oil circuit.
With reference to figure 3, owing to need dodge structure such as periphery such as water jacket 12 grades, the operative position alternative of back oil road 8 is very little, is positioned at the oblique below of rocker arm support installation base 7 substantially near the position of air inlet side 2.In prior art one, in order to provide lubricated to valve rocker (comprising intake rocker and exhaust rocker arm) assembly, the general mode of boring inclined oil hole of air 9 from rocker arm support installation base 7 that adopts is communicated to back oil road 8, so only needs once boring, and is easy to process.
With reference to figure 4, different with Fig. 3 is, in prior art two, get out the first straight oilhole 10 straight down from 7 beginnings of rocker arm support installation base, 2 beginning levels are bored second straight oilhole 11, the first straight oilholes 10 and second straight 11 crossing connections of oilhole from the air inlet side then, and the second straight oilhole 11 is communicated with back oil road 8, thereby make the fluid in the back oil road 8 arrive rocker arm support installation base 7 via the second straight oilhole 11, the first straight oilhole 10, further enter valve rocker.Adopt two straight oilholes to replace inclined oil hole of air and can make further tangential two the straight oilholes of rotating locus (not shown) of the cam on the camshaft 13, make the compacter and miniaturization of structure of motor.But, if can not control machining accuracy well, when boring the first straight oilhole 10 and the second straight oilhole 11, make cylinder head become waste product because dislocation can not be communicated with probably, perhaps both only partly connections (as shown in Figure 5).In addition, even the rotating locus of cam and two straight oilholes are all tangent, the position of the represented B part that goes out still can't be designed and cast out the water jacket chamber among Fig. 4, because if the words at this place's design water jacket chamber, then must dodge back oil road 8, the first straight oilhole 10 and the second straight oilhole 11 simultaneously, it is very complicated that this makes that water jacket arranges.Even and designed the water jacket chamber in the position of B part, because the water jacket chamber produces in casting process, and back oil road 8, the first straight oilhole 10 and the second straight oilhole 11 are reprocessing after casting is finished, therefore add and be easy to penetrate the chamber that B partly locates man-hour and cause fluid to mix, therefore be actually and be difficult to realize, be easy to cause waste product to increase.
With reference to 6, circular arc tubular element 20 has first end 21 and second end, 22, the first ends, 21 places are opening end.In the casting process of cylinder head, circular arc tubular element 20 places mold as embedded part, pours into a mould casting material then in mold, for example aluminum alloy, cast iron etc.After the casting material cooling, circular arc tubular element 20 is cast in wherein as the part of cylinder head.Because whole tubular element 20 is circular arc, therefore can avoids or reduce circular arc tubular element 20 casting material on every side and in cooling procedure, crack owing to stress is concentrated.In order to increase the tightness that is connected with casting material, have many fins 23 on the outer wall of preferred circular arc tubular element 20, those of ordinary skills can imagine at an easy rate, fin 23 can be multiple shapes such as annular, curvilinerar figure, perhaps with the prominent fin that replaces of the point of pit shape, all can play good connection effect.
With reference to figure 7, after being cast in the cylinder head, circular arc tubular element 20 becomes the part of cylinder head, and first end 21 is in 7 upper sheds of rocker arm support installation base.Process back oil road 8 then, circular arc tubular element 20 is communicated with back oil road 8, also further to provide lubricated to intake rocker 16 and exhaust rocker arm 18 to rocker arm support 14.And the center of circle of circular arc tubular element 20 overlaps with the center of circle of the axis hole 61 of camshaft fitting seat 6, be C, can make B part among Fig. 5 radially away from center of circle C like this, in other words make B partly be in the outside in the relative center of circle of circular arc tubular element 20, therefore water jacket chamber 12 can expand to the position of B part and need not to consider to dodge the circular arc tubular element, the water jacket chamber is both with the oil leab of circular arc tubular element 20(or perhaps circular arc in casting process) moulding, reduced design, difficulty of processing.And the center of circle of circular arc tubular element 20 overlaps with the center of circle of the axis hole 61 of camshaft fitting seat 6 and means that can maximally utilise existing space arranges the water jacket chamber, thereby obtains favorable cooling effect.Because circular-arc tubular element 20 itself is exactly the member of a perforation, therefore can not produce the phenomenon of straight oilhole dislocation.In the present embodiment, second end 22 ends in back oil road 8 places just, and has S at interval between the air inlet side 2, both circular arc tubular element 20 was at 2 places, air inlet side and imperforation, omitted the shutoff operation like this, and the position of S can process the loss of weight hole at interval, perhaps arranges water jacket chamber 12 when casting herein.In order to obtain better water jacket cooling effect, preferably arrange water jacket chamber 12 at interval S place.Certainly, those of ordinary skills can imagine at an easy rate that for reasons such as machining accuracies, second end 22 also can continue 2 extensions even arrival 2 places, air inlet side towards the air inlet side, but considering that for the above reasons this is not have advantage, is not preferred version of the present utility model therefore.
With reference to figure 8, its principle has shown the advantage that embodiment of the present utility model compared with prior art has.For simply clear, all oil ducts are all represented with straight line or curve in Fig. 8.When design, in order to make compact structure, the rotating locus of the cam on the camshaft 13 (substitute with axis hole 61 in this article and illustrate) tends to oil leab tangent.Under prior art one condition, utilize inclined oil hole of air 9(to be represented by dotted lines) as oil leab, then the axis hole 61(of camshaft fitting seat 6 is represented by dotted lines at this moment) the center of circle be positioned at the C1 place.And in prior art two, adopt the first straight oilhole 10 and the second straight oilhole 11 as behind the oil leab, then represent with solid line the axis hole 61(of camshaft fitting seat 6 at this moment) the center of circle can be moved to the C2 place, thereby can reduce the width of cylinder head (perhaps highly, perhaps both have concurrently), still, this moment, the B part was surrounded by the profile line of the first straight oilhole 10, the second straight oilhole 11, back oil road 8 and axis hole 61, all filled by casting material, be difficult to utilize this location arrangements water jacket chamber 12.In the utility model, after having adopted circular arc tubular element 20, because oil leab is the circular arc concentric with axis hole 61, therefore circular arc tubular element 20 is all tangent with axis hole 61 basically, the space that surrounds is very little, thereby dodge more space and arrange water jacket chamber 12, thereby improved the cooling effect of cylinder head, realized the miniaturization of motor simultaneously.
Though the utility model is described in conjunction with above embodiment, but the utility model is not defined to above-described embodiment, and only be subjected to the restriction of claim, those of ordinary skills can easily make amendment to it and change, but do not leave essence design of the present utility model and scope.
Claims (4)
1. cylinder head, described cylinder head has end face, the bottom surface, the air inlet side, the exhaust side, front-end face and ear end face, be distributed with camshaft fitting seat and rocker arm support installation base on the described end face, the back oil road that has perforation between described front-end face and the described ear end face, it is characterized in that, integrally casting has the circular arc tubular element in the described cylinder head, described circular arc tubular element is communicated with described back oil road, and an end of described circular arc tubular element is in the upper shed of described rocker arm support installation base, and the center of circle of described circular arc tubular element overlaps with the center of circle of the axis hole of described camshaft fitting seat.
2. cylinder head according to claim 1 is characterized in that, has between the other end of described circular arc tubular element and the described air inlet side at interval.
3. cylinder head according to claim 2 is characterized in that, described interval location is distributed with the water jacket chamber.
4. according to each the described cylinder head in the claim 1 to 3, it is characterized in that the outer wall of described circular arc tubular element has fin or point is prominent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320246472 CN203223305U (en) | 2013-05-08 | 2013-05-08 | Air cylinder cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320246472 CN203223305U (en) | 2013-05-08 | 2013-05-08 | Air cylinder cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203223305U true CN203223305U (en) | 2013-10-02 |
Family
ID=49250310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320246472 Withdrawn - After Issue CN203223305U (en) | 2013-05-08 | 2013-05-08 | Air cylinder cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203223305U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291486A (en) * | 2013-05-08 | 2013-09-11 | 安徽江淮汽车股份有限公司 | Air cylinder cover and manufacturing method thereof |
| WO2014169553A1 (en) * | 2013-04-18 | 2014-10-23 | 安徽江淮汽车股份有限公司 | Cylinder head, method for manufacturing same, and engine |
-
2013
- 2013-05-08 CN CN 201320246472 patent/CN203223305U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014169553A1 (en) * | 2013-04-18 | 2014-10-23 | 安徽江淮汽车股份有限公司 | Cylinder head, method for manufacturing same, and engine |
| CN103291486A (en) * | 2013-05-08 | 2013-09-11 | 安徽江淮汽车股份有限公司 | Air cylinder cover and manufacturing method thereof |
| CN103291486B (en) * | 2013-05-08 | 2015-01-14 | 安徽江淮汽车股份有限公司 | Air cylinder cover and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131002 Effective date of abandoning: 20150114 |
|
| RGAV | Abandon patent right to avoid regrant |