CN103291486B - Air cylinder cover and manufacturing method thereof - Google Patents
Air cylinder cover and manufacturing method thereof Download PDFInfo
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- CN103291486B CN103291486B CN201310167641.1A CN201310167641A CN103291486B CN 103291486 B CN103291486 B CN 103291486B CN 201310167641 A CN201310167641 A CN 201310167641A CN 103291486 B CN103291486 B CN 103291486B
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- circular arc
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- arc tubular
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Abstract
The invention provides an air cylinder cover. The air cylinder cover comprises a top surface, an undersurface, an air incoming side face, an air exhaust side face, a front end face and a rear end face, camshaft mounting seats and rocker support mounting bosses are distributed on the top surface, a through oil return passage is arranged between the front end face and the rear end face, an arc-shaped tubular member is integrally cast in the air cylinder cover, the arc-shaped tubular member is communicated with the oil return passage, one end of the arc-shaped tubular member is provided with an opening on one rocker support mounting boss, and the center of the arc-shaped tubular member coincides with that of a shaft hole of the camshaft mounting seat. The invention further provides a manufacturing method of the air cylinder cover. The air cylinder cover has the advantages of simplicity in manufacturing and high accuracy.
Description
Technical field
The present invention relates to engine art, be specifically related to a kind of circular arc tubular element that is wherein cast with as the cylinder head of oil leab and manufacture method thereof.
Background technique
In the evolution of automotive industry, how to realize the miniaturization of motor, compactness is the target that designer constantly pursues always.
In Chinese Patent Application No.: in the patent of invention of 96192117.X, the applying date: 1996-10-16, denomination of invention " rocker arm assembly of internal-combustion engine ", disclose a kind of internal-combustion engine, valve rocker is installed in cylinder head by rocker arm support, and rocker arm support is installed when being fastened on cylinder cap, need on cylinder cap, cast out rocker arm support installation base.Further, in order to provide lubrication to valve rocker, rocker arm support and rocking arm support pads are provided with oil leab.
In Chinese Patent Application No.: in the utility model patent of 201220401277.1, the applying date: 2012-8-14, denomination of invention " overhead camshaft cylinder cap ", further disclose the lubricating oil passage structure of back oil road to rocker arm support installation base fuel feeding of cylinder head.Because the structure of motor is very compact, in order to dodge the structures such as the water jacket of surrounding, back oil road can only be positioned at the below of cam shaft installing seat, for consideration easy to process, rocker arm support installation base adopt inclined oil hole of air and back oil road through.But inclined oil hole of air also limit the further miniaturization of motor, there is room for improvement.
In Chinese Patent Application No.: 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 ", inventor proposes to utilize the second straight oilhole of the first straight oilhole and the horizontal-extending from air inlet side extended straight down from rocker arm support installation base to be communicated with back oil road, replace the inclined oil hole of air usually adopted, thus realize the further miniaturization of motor.But, first straight oilhole and the second straight oilhole are formed by machining, this just needs to experience in course of working from the boring of cylinder head top with from air inlet flank hole two procedures, twice Drilling operation required precision is high on the one hand, otherwise holes can be caused not to be communicated with makes cylinder head become waste product, even if or be communicated with but intersect due to two axially bored line antarafacials and holes is misplaced be communicated with, hinder fluid to the flowing of rocker arm support installation base; On the other hand, near the intersection location place of two straight oilholes, still there is the space cannot designing water jacket, there is the space of improving further.
Summary of the invention
The object of the invention is to overcome above-mentioned shortcoming, make while the miniaturization realizing motor further the processing of cylinder head simpler, larger space is provided thus realizes better cooling effect for the layout of cooling jacket.
For achieving the above object, the invention 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, described end face is distributed with cam shaft installing seat and rocker arm support installation base, between described front-end face and described ear end face, there is through back oil road, in described cylinder head, integrally casting has circular arc tubular element, described circular arc tubular element is communicated with described back oil road, and one end of described circular arc tubular element is in the upper shed of described rocker arm support installation base, the center of circle of described circular arc tubular element overlaps with the center of circle of the axis hole of described cam shaft installing seat.
Preferably, between the other end of described circular arc tubular element and described air inlet side, there is interval.
Preferably, described interval location is distributed with water jacket chamber.
Preferably, the outer wall of described circular arc tubular element has fin or point is prominent.
A manufacture method for cylinder head, comprises the following steps: by the mould pre-buried for circular arc tubular element; Cast casting material also cools, described circular arc tubular element is made to be cast in described cylinder head, and making described circular arc tubular element one end in the rocker arm support installation base upper shed of described cylinder head, the center of circle of described circular arc tubular element overlaps with the center of circle of the axis hole of described cam shaft installing seat; Processing back oil road, makes described back oil road be communicated with described circular arc tubular element.
Preferably, after having cast, machining is carried out to the opening of described circular arc tubular element.
Preferably, after having cast, machining is carried out to the opening of described circular arc tubular element the material of described opening and neighbouring casting material thereof are excised simultaneously, make described opening tapered.
The present invention in the casting process of cylinder head by the mould pre-buried for circular arc tubular element, thus circular arc tubular element is cast in cylinder head formed the oil circuit from rocker arm support installation base to back oil road, without the need to carrying out horizontal drilling and vertical drilling again, save operation, processing is simpler, and can ensure that oil circuit is through and impact without the need to considering the machining accuracy of holing.And, the center of circle of circular arc tubular element overlaps with the center of circle of the axis hole of cam shaft installing seat, the profile line of whole circular arc tubular element all can be tended to cam rotating locus tangent, thus to greatest extent for arranging that water jacket chamber provides space, cooling effect can be improved while the further miniaturization realizing motor.Further, the circular shape of tubular element is conducive to the stress distribution between the casting material of cylinder head and tubular element, and stress can not be caused to concentrate.
Further, have interval between one end of circular arc tubular element and air inlet side, this not only saves the operation of carrying out shutoff in air inlet side, and provides space for realizing cylinder head jacket layout in a wider context.
Further, interval location is distributed with water jacket chamber and can improves water jacket cooling effect.
Further, the fin on the outer wall of circular arc tubular element or point is prominent that the connection of circular arc tubular element and casting material can be made tightr.
Further, after having cast, machining is carried out to the opening of circular arc tubular element, the sarcoma near opening, scab, excess stock etc. can be eliminated, thus avoid oil leab to be affected fuel feeding effect by shutoff, make the surface of rocker arm support installation base more smooth simultaneously, ensure the installation precision of rocker arm support.
Further, after having cast, carry out machining to the opening of circular arc tubular element the material of opening and neighbouring casting material thereof are excised simultaneously, make described opening tapered, the sarcoma near opening, scab, excess stock etc. can not only be eliminated, thus avoid oil leab to be affected fuel feeding effect by shutoff, make the surface of rocker arm support installation base more smooth simultaneously, ensure the installation precision of rocker arm support, and eliminate casting material and L shape tubular element in casting process end opening stress concentrate, improve stress-bearing capability.
Accompanying drawing explanation
Next will be described in further detail specific embodiments of the invention 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 the motor of embodiments of the invention, and the members on motor is omitted;
Fig. 3 is the sectional view of the A-A line along Fig. 1, indicates the lubricating oil passage structure of prior art one;
Fig. 4 is the sectional view of the A-A line along Fig. 1 of similar Fig. 3, indicates the lubricating oil passage structure of prior art two;
Fig. 5 diagrammatically illustrates the first straight oilhole and the second straight oilhole in prior art two and to misplace only partially communicating situation;
Fig. 6 is the plan view of the circular arc tubular element of embodiments of the invention;
Fig. 7 is the sectional view of the A-A line along Fig. 1 of similar Fig. 3, indicates the lubricating oil passage structure of embodiments of the invention;
Fig. 8 principle schematic that to be the present invention carry out with prior art contrasts.
Upper figure description of symbols: end face 1, air inlet side 2, exhaust side 3, front-end face 4, ear end face 5, cam shaft installing seat 6, rocker arm support installation base 7, back oil road 8, the straight oilhole 11 of the straight oilhole of inclined oil hole of air 9, first 10, second, 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
Composition graphs 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 relief opening exhaust side 3, towards the front-end face 4 of timing wheel 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 be relative timing wheel train position definition, certainly also can adopt other definition mode, such as, the definition position of front and rear end be exchanged.On end face 1, be distributed with cam shaft installing seat 6, and be distributed with rocker arm support installation base 7 in its vicinity.Camshaft 13 is arranged in the axis hole 61 of cam shaft installing seat 6, and rocker arm support 14 is arranged on rocker arm support installation base 7, rocker arm support 14 is provided with intake rocker 16 and exhaust rocker arm 8.Camshaft 13 is by rotary actuation intake rocker 16 to drive a pair intake valve 17, and camshaft 13 drives exhaust rocker arm 18 to drive a pair exhaust valve 19 simultaneously.Back oil road 8 extends until ear end face 5 from front-end face 4, thus between front and rear end through whole cylinder head, as a part for cylinder lubrication oil circuit.
With reference to figure 3, because peripheral structure such as water jacket 12 grade dodged by needs, the operative position alternative of back oil road 8 is very little, generally within the oblique below of rocker arm support installation base 7 near the position of air inlet side 2.In prior art one, in order to provide lubrication to valve rocker (comprising intake rocker and exhaust rocker arm) assembly, the mode that general employing bores inclined oil hole of air 9 from rocker arm support installation base 7 is communicated to back oil road 8, so only needs once to hole, easy to process.
With reference to figure 4, with Fig. 3 unlike, in prior art two, the first straight oilhole 10 is got out straight down from rocker arm support installation base 7, then from air inlet side 2, the straight oilhole 10 of level brill the second straight oilhole 11, first is crossing with the second straight oilhole 11 is communicated with, and in course of working, make the second straight oilhole 11 be communicated with back oil road 8, thus enable the fluid in back oil road 8 arrive rocker arm support installation base 7 via the straight oilhole 10 of the second straight oilhole 11, first, enter valve rocker further.Adopt two straight oilholes to replace inclined oil hole of air and can make the rotating locus (not shown) of the cam on camshaft 13 tangential two straight oilholes further, make the compacter and miniaturization of the structure of motor.But, if can not controlled working precision well, make cylinder head become waste product at the straight oilhole 10 of brill first with being probably communicated with because of dislocation during the second straight oilhole 11, or both only parts connections (as shown in Figure 5).In addition, even if the rotating locus of cam and two straight oilholes all tangent, the position of the part B gone out represented by Fig. 4 still cannot be designed and cast out water jacket chamber, because if in the words of this place design water jacket chamber, then must dodge the straight oilhole of back oil road 8, first 10 and the second straight oilhole 11, it is very complicated that this makes water jacket arrange simultaneously.Even and if devise water jacket chamber in the position of part B, because water jacket chamber produces in casting process, and the straight oilhole of back oil road 8, first 10 and the second straight oilhole 11 are reprocessed after casting completes, therefore adding the chamber being easy to man-hour penetrate part B place causes fluid to mix, therefore be actually 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 the second end 22, and first end 21 place is opening end.In the casting process of cylinder head, circular arc tubular element 20 is placed in mold as embedded part, then in mold, pours into a mould casting material, such as aluminum alloy, cast iron etc.After casting material cooling, circular arc tubular element 20 is cast in wherein as a part for cylinder head.Because whole tubular element 20 is circular arc, therefore, it is possible to avoid or the casting material that reduces around circular arc tubular element 20 is concentrated due to stress and cracks in cooling procedure.In order to increase the tightness be connected with casting material, the outer wall of preferred circular arc tubular element 20 have many fins 23, those of ordinary skill in the art can imagine easily, fin 23 can be the various shapes such as annular, curvilinerar figure, or replace fin so that the point of pit shape is prominent, all can play good connection effect.
With reference to figure 7, circular arc tubular element 20 is cast in the part becoming cylinder head after in cylinder head, and first end 21 is in rocker arm support installation base 7 upper shed.Then process back oil road 8, circular arc tubular element 20 is communicated with back oil road 8, also to provide lubrication to intake rocker 16 and exhaust rocker arm 18 further 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 cam shaft installing seat 6, be C, the part B in Fig. 5 can be made so radial away from center of circle C, in other words part B is made to 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 part B and dodge circular arc tubular element without the need to considering, in casting process water jacket chamber both with the oil leab of circular arc tubular element 20(or perhaps circular arc) together with shaping, reduce 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 cam shaft installing seat 6 and means that can maximally utilise existing space arranges water jacket chamber, thus obtains good cooling effect.Due to an arc-shaped tubular element 20 inherently through component, the phenomenon of straight oilhole dislocation therefore can not be produced.In the present embodiment, second end 22 ends in back oil road 8 place just, and there is between air inlet side 2 interval S, both circular arc tubular element 20 was at air inlet side 2 place and imperforation, eliminate shutoff operation like this, and the position of interval S can process loss of weight hole, or arranges water jacket chamber 12 herein when casting.In order to obtain better water jacket cooling effect, preferably arrange water jacket chamber 12 at S place, interval.Certainly, those of ordinary skill in the art can imagine easily, and for reasons such as machining accuracies, the second end 22 also can continue to extend towards air inlet side 2 even arrival air inlet side 2 place, but considering that this does not have advantage for the above reasons, is not therefore preferred version of the present invention.The blank cast out often there will be the casting defect such as scab, sarcoma; thus part even all blocks the opening at first end 21 place; affect fluid circulation; affect the surface flatness of rocker arm support installation base simultaneously; and then affect the installation precision of intake rocker and exhaust rocker arm, affect distribution precision.Therefore, after having cast, preferably carry out cutting machine processing at the opening of first end 21, such as brill, ream, milling etc., to eliminate casting defect, ensure that opening is not closed, and make the surface of rocker arm support installation base more smooth, improve installation precision.When carrying out machining to opening, the excess stock such as sarcoma, scab of opening can either be only excised by boring, also circular arc tubular element 20 can be excised at the portion of material of opening and and part casting material near opening by ream cone shape hole simultaneously.In casting, the material of circular arc tubular element 20 is different from the physical property of casting material, therefore easily produce stress in the edge of bi-material sharply transition to concentrate, therefore preferably the opening of first end 21 on rocker arm support installation base 7 of circular arc tubular element 20 is cut to taper, like this, only by cutting at one time machining, the stress eliminated between circular arc tubular element 20 and cylinder head casting material can either be played concentrate, the casting defect such as scab, sarcoma near opening can be eliminated again thus be beneficial to fluid and flow out and improve installation precision.
With reference to figure 8, its principle indicates the advantage that compared with prior art embodiments of the invention have.In order to simply clear, all oil ducts all represent with straight line or curve in fig. 8.When designing, in order to make compact structure, the rotating locus (substitute with axis hole 61 in this article and illustrate) of the cam on camshaft 13 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 cam shaft installing seat 6 is now represented by dotted lines) the center of circle be positioned at C1 place.And in prior art two, adopt the first straight oilhole 10 and the second straight oilhole 11 as after oil leab, then the axis hole 61(of cam shaft installing seat 6 now represents with solid line) the center of circle can be moved to C2 place, thus can reduce cylinder head width (or height, or both have concurrently), but, now part B surround by the profile line of the straight oilhole 11 of the first straight oilhole 10, second, back oil road 8 and axis hole 61, all by casting material is filled, be difficult to utilize this location arrangements water jacket chamber 12.In the present invention, after have employed circular arc tubular element 20, due to the circular arc that oil leab is concentric with axis hole 61, therefore circular arc tubular element 20 is substantially all tangent with axis hole 61, the space surrounded is very little, thus dodge more space and arrange water jacket chamber 12, thus improve the cooling effect of cylinder head, achieve the miniaturization of motor simultaneously.
Although the present invention is described in conjunction with above embodiment, but the present invention is not defined to above-described embodiment, and only by the restriction of claim, those of ordinary skill in the art can easily modify to it and change, but do not leave essential idea of the present invention and scope.
Claims (7)
1. a cylinder head, described cylinder head has end face, bottom surface, air inlet side, exhaust side, front-end face and ear end face, described end face is distributed with cam shaft installing seat and rocker arm support installation base, between described front-end face and described ear end face, there is through back oil road, it is characterized in that, in described cylinder head, integrally casting has circular arc tubular element, described circular arc tubular element is communicated with described back oil road, and one end of described circular arc tubular element is in the upper shed of described rocker arm support installation base, the center of circle of described circular arc tubular element overlaps with the center of circle of the axis hole of described cam shaft installing seat.
2. cylinder head according to claim 1, is characterized in that, has interval between the other end of described circular arc tubular element and described air inlet side.
3. cylinder head according to claim 2, is characterized in that, described interval location is distributed with water jacket chamber.
4. the cylinder head according to any one in claims 1 to 3, is characterized in that, the outer wall of described circular arc tubular element has fin or point is prominent.
5. a manufacture method for cylinder head, is characterized in that, comprises the following steps:
By in the mould pre-buried for circular arc tubular element;
Cast casting material also cools, described circular arc tubular element is made to be cast in described cylinder head, and making described circular arc tubular element one end in the rocker arm support installation base upper shed of described cylinder head, the center of circle of described circular arc tubular element overlaps with the center of circle of the axis hole of described cam shaft installing seat;
Processing back oil road, makes described back oil road be communicated with described circular arc tubular element.
6. the manufacture method of cylinder head according to claim 5, is characterized in that, after having cast, carries out machining to the opening of described circular arc tubular element.
7. the manufacture method of cylinder head according to claim 6, is characterized in that, after having cast, carries out machining and the material of described opening and neighbouring casting material thereof is excised simultaneously, make described opening tapered to the opening of described circular arc tubular element.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310167641.1A CN103291486B (en) | 2013-05-08 | 2013-05-08 | Air cylinder cover and manufacturing method thereof |
| AU2013386647A AU2013386647B2 (en) | 2013-04-18 | 2013-09-05 | Cylinder head, method for manufacturing same, and engine |
| RU2015149110A RU2629848C2 (en) | 2013-04-18 | 2013-09-05 | Head of cylinder block (versions), method of its manufacture (versions) and engine |
| PCT/CN2013/082987 WO2014169553A1 (en) | 2013-04-18 | 2013-09-05 | Cylinder head, method for manufacturing same, and engine |
| BR112015026313A BR112015026313A2 (en) | 2013-04-18 | 2013-09-05 | cylinder head, method of manufacture of the cylinder and engine |
| CL2015003051A CL2015003051A1 (en) | 2013-04-18 | 2015-10-15 | Cylinder head, method of manufacturing and an engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310167641.1A CN103291486B (en) | 2013-05-08 | 2013-05-08 | Air cylinder cover and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN103291486A CN103291486A (en) | 2013-09-11 |
| CN103291486B true CN103291486B (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310167641.1A Active CN103291486B (en) | 2013-04-18 | 2013-05-08 | Air cylinder cover and manufacturing method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108176823A (en) * | 2018-01-23 | 2018-06-19 | 广州贝士特橡塑有限公司 | A kind of mold production mixing cylinder cap |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101020225A (en) * | 2006-12-20 | 2007-08-22 | 天水星火机床有限责任公司 | Tube imbedding casting process to form bent cast hole |
| CN200964901Y (en) * | 2006-11-03 | 2007-10-24 | 董大东 | Cylinder cover, side cover |
| CN202391582U (en) * | 2011-10-26 | 2012-08-22 | 上汽通用五菱汽车股份有限公司 | Cylinder head structure for engine |
| CN202732015U (en) * | 2012-08-14 | 2013-02-13 | 北京长源朗弘科技有限公司 | Overhead camshaft cylinder cover |
| CN203223305U (en) * | 2013-05-08 | 2013-10-02 | 安徽江淮汽车股份有限公司 | Air cylinder cover |
-
2013
- 2013-05-08 CN CN201310167641.1A patent/CN103291486B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200964901Y (en) * | 2006-11-03 | 2007-10-24 | 董大东 | Cylinder cover, side cover |
| CN101020225A (en) * | 2006-12-20 | 2007-08-22 | 天水星火机床有限责任公司 | Tube imbedding casting process to form bent cast hole |
| CN202391582U (en) * | 2011-10-26 | 2012-08-22 | 上汽通用五菱汽车股份有限公司 | Cylinder head structure for engine |
| CN202732015U (en) * | 2012-08-14 | 2013-02-13 | 北京长源朗弘科技有限公司 | Overhead camshaft cylinder cover |
| CN203223305U (en) * | 2013-05-08 | 2013-10-02 | 安徽江淮汽车股份有限公司 | Air cylinder cover |
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| CN103291486A (en) | 2013-09-11 |
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Inventor after: Hu Biqian Inventor after: Jin Suhua Inventor after: Guo Xiaoxuan Inventor after: Hu Zhisheng Inventor after: Qian Demeng Inventor after: Xu Tao Inventor after: Zheng Jiulin Inventor before: Ma Yufeng Inventor before: Jin Suhua Inventor before: Meng Xiangshan Inventor before: Hu Zhisheng Inventor before: Lu Ming Inventor before: Xu Tao Inventor before: Zheng Jiulin |
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Free format text: CORRECT: INVENTOR; FROM: MA YUFENG JIN SUHUA MENG XIANGSHAN HU ZHISHENG LU MING XU TAO ZHENG JIULIN TO: HU BIQIAN JIN SUHUA GUO XIAOXUAN HU ZHISHENG QIAN DEMENG XU TAO ZHENG JIULIN |
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Address after: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee before: Anhui Jianghuai Automotive Co., Ltd. |
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Address after: 230601 No. 99 Ziyun Road, Hefei Economic and Technological Development Zone, Anhui Province Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230022 No. 176 Dongliu Road, Hefei City, Anhui Province Patentee before: Anhui Jianghuai Automobile Group Limited by Share Ltd |
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