CN101363334A - Admission cam shaft structure - Google Patents
Admission cam shaft structure Download PDFInfo
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- CN101363334A CN101363334A CNA2008100703586A CN200810070358A CN101363334A CN 101363334 A CN101363334 A CN 101363334A CN A2008100703586 A CNA2008100703586 A CN A2008100703586A CN 200810070358 A CN200810070358 A CN 200810070358A CN 101363334 A CN101363334 A CN 101363334A
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- cam shaft
- camshaft
- axle journal
- admission cam
- hole
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Abstract
The invention relates to an admission cam shaft structure; the center of the cam shaft (1) is provided with a lubricating hole (9) which runs through the front end face and the rear end face of the cam shaft, four pairs of cams are distributed on the body of the cam shaft (1) from front to back, that is, a first admission cam (4), a second admission cam (5), a third admission cam (6) and a fourth admission cam (7) respectively; the rear end of the cam shaft (1) is provided with a shaft journal (3) which forms a ring-shaped boss, and the diameter of the ring-shaped boss is larger than that of the body of the cam shaft (1); the front end and the middle of the shaft journal (3) are respectively provided with a ring-shaped fin (10), a ring-shaped neck (11) is arranged between the two fins (10), the rear end face of the shaft journal (3) is forwardly provided with a dowel hole (12) along the axial line, and the dowel hole (12) is positioned beside the lubricating hole (9). Under the promise of not changing the structure of a cylinder cover, the admission cam shaft structure is suitable for the installation of a VVT mechanism and has the advantages of artful design, simple structure, easy implementation, low cost for modification, etc.
Description
Technical field
The present invention relates to a kind of motor car engine member, relate in particular to the admission cam shaft on the motor car engine.
Background technique
At present, the structure of car engine air admittance camshaft as shown in Figure 5, front end at camshaft 1 is provided with positive stop lug boss 2 and axle journal 3, positive stop lug boss 2 and axle journal 3 ask the formation draw-in groove, be provided with positioning boss 8 in the rear end of camshaft 1, be distributed with four pairs of cams on the axle body between axle journal 3 and this positioning boss 8 from front to back, be respectively first intake cam 4, second intake cam 5, the 3rd intake cam 6 and the 4th intake cam 7.During assembling, admission cam shaft 1 is supported on the cylinder cap by the draw-in groove of its front end and the axle body of its rear end positioning boss 8 inboards, the air inlet timing gear of installing on the axle journal 3 are meshed with the driving gear on the exhaust cam shaft, and exhaust cam shaft also is connected with bent axle by belt and belt pulley, the acting of gas fuel burning in the cylinder promotes reciprocating motion of the pistons like this, piston drives crankshaft rotating by connecting rod, bent axle is in outputting power, driving exhaust cam shaft by belt rotates, exhaust cam shaft is again by the rotation of gear driven admission cam shaft, advance, in the time of the exhaust cam shaft rotation, the cam unseat the valve on the axle body carries out air inlet or exhaust separately.
In order to improve power character, the fuel economy of motor in all speed range, reduce the discharging of tail gas, each automobile production producer is all in the optimization of making great efforts research camshaft degree valve timing." VVT " is the english abbreviation of variable valve timing system of engine, and this system can regulate engine timing continuously.When motor by low speed during to high-speed transitions, electronic computer is automatically pressed to machine oil the little turbine in the intake cam shaftgear, under the effect of pressure, little turbine just can rotate to an angle with respect to gear hub, thereby make admission cam shaft rotation forward or backward in certain scope, to change the moment of IO Intake Valve Opens, reach continuous purpose of regulating valve timing.The producer that has is installed in vvt mechanism the front side of admission cam shaft, abut against the next door of air inlet timing gear, because the space of cylinder cap front portion is limited, though this mounting type is less to the change of inlet and outlet camshaft, but the change to the cylinder cap structure is bigger, reforming cost is quite high, and the redundant space at cylinder cap rear portion is not utilized effectively.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of admission cam shaft structure that vvt mechanism is installed that adapts under the prerequisite that does not change the cylinder cap structure.
Technological scheme of the present invention is as follows: a kind of admission cam shaft structure, offer the oilhole that connects its front and rear end at the center of camshaft, be distributed with four pairs of cams on the axle body of camshaft from front to back, be respectively first intake cam, second intake cam, the 3rd intake cam and the 4th intake cam, rearward end at camshaft is provided with axle journal, this axle journal forms annular boss, and the diameter of annular boss is greater than the diameter of camshaft axle body; Respectively be provided with a circle fin at the front end of described axle journal and middle part, form annular slot between two fins, offer positioning pin hole at the ear end face of described axle journal forward along axis, this positioning pin hole is positioned at the next door of oilhole.
The present invention changes axle journal into be arranged on admission cam shaft rear end by the front end that is positioned at admission cam shaft in the conventional construction, and admission cam shaft is supported on the cylinder cap by the annular slot on its front end and the back end journal; The rear sleeve of axle journal is put into the gas timing gear, and the positioning pin hole on the axle journal is used to install vvt mechanism.The axle journal of exhaust cam shaft and the driving gear that is installed on it are correspondingly adjusted to the rear end, and the redundant space at cylinder cap rear portion just in time can ccontaining vvt mechanism, driving gear and air inlet timing gear.This shows that the present invention is under the prerequisite that does not change the cylinder cap structure, the structure that only needs to adjust the inlet and outlet camshaft just can adapt to the vvt mechanism installation, and reforming cost is lower, and implements to be very easy to.
Offer the auxiliary oilhole of " L " shape on above-mentioned axle journal, an end of this auxiliary oilhole is positioned at the bottom land of annular slot, and the other end of auxiliary oilhole connects the ear end face to axle journal.Auxiliary oilhole is used for the machine oil vvt mechanism that leads, and makes lubricated good, the reliable performance of vvt mechanism; Auxiliary oilhole adopts " L " shape, helps processing.
Position at close its front end of above-mentioned camshaft radially offers the installation pin-and-hole, and the front side of this installation pin-and-hole is provided with annular shallow slot, and the rear side that pin-and-hole is installed has the annular small boss of a circle.Pin-and-hole is installed by locating stud stationary cam axle position target wheel, and circumferentially spacing, is come off and rotate with respect to admission cam shaft to prevent the camshaft location target wheel to the camshaft location target wheel; Collar is installed in the annular shallow slot, and collar cooperates with small boss, to camshaft location target wheel axial limiting, comes off to prevent the camshaft location target wheel.The camshaft location target wheel is to the sensor passes rotating position signal, so that can control the open and close time of valve more accurately.
Above-mentioned each intake cam is stepped shape, and the thickness of each intake cam flange end is greater than the thickness of basic circle end.Above structure guarantee intake cam flange end intensity and with valve between contact area in, can effectively save material, reduce cost of material, and alleviate the weight and the rotary inertia of admission cam shaft, make the admission cam shaft rotational resistance littler, effective merit volume of output is more.
Beneficial effect: the present invention can adapt to vvt mechanism and install under the prerequisite that does not change the cylinder cap structure, have be skillfully constructed, simple in structure, implement easily, characteristics such as reforming cost is low.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the right elevation of Fig. 1.
Fig. 4 is the structural representation of admission cam shaft front end.
Fig. 5 is the structural representation of background technique.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
As Fig. 1, shown in Figure 4, offer the oilhole 9 that connects its front and rear end at the center of camshaft 1, the correct position of camshaft 1 axle body has oil outlet, and oil outlet is connected with oilhole 9.Radially offer three in the position of camshaft 1 close its front end pin-and-holes 14 are installed, these three pin-and-hole 14 being installed evenly distributes on circumference, be used for by locating stud stationary cam axle position target wheel (figure does not draw), and circumferentially spacing to the camshaft location target wheel, to prevent that the camshaft location target wheel from coming off and to rotate with respect to admission cam shaft 1.Be provided with annular shallow slot 15 in the front side that pin-and-hole 14 is installed, the rear side that pin-and-hole 14 is installed has the annular small boss 16 of a circle, in the annular shallow slot 15 collar is installed, and collar cooperates with small boss 16, to camshaft location target wheel axial limiting, come off to prevent the camshaft location target wheel.
As Fig. 1, shown in Figure 3, be provided with axle journal 3 in the rearward end of camshaft 1, this axle journal 3 forms annular boss, and the diameter of annular boss is greater than the diameter of camshaft 1 axle body.The rear portion of axle journal 3 is used for installing air inlet timing gear (figure does not draw), front end and middle part at axle journal 3 respectively are formed with a circle fin 10, form annular slot 11 between two fins 10, camshaft 1 is supported on the cylinder cap by its front end and this annular slot 11, and fin 10 plays axial limiting.Ear end face at axle journal 3 offers positioning pin hole 12 forward along axis, and this positioning pin hole 12 is positioned at the next door of oilhole 9, and positioning pin hole 12 is used for by the fixing vvt mechanism of locating stud.Also offer the auxiliary oilhole 13 of four " L " shapes on the described axle journal 3, these four auxiliary oilholes 13 evenly distribute on circumference, and an end of each auxiliary oilhole 13 is positioned at the bottom land of annular slot 11, and the other end of auxiliary oilhole 13 connects to the ear end face of axle journal 3.Auxiliary oilhole 13 is used for the machine oil vvt mechanism that leads is made lubricated good, the reliable performance of vvt mechanism
As shown in Figure 1 and Figure 2, camshaft 1 is distributed with four pairs of cams from front to back on the axle body between small boss 16 and the axle journal 3, be respectively first intake cam 4, second intake cam 5, the 3rd intake cam 6 and the 4th intake cam 7, these four pairs of intake cam flanges towards having nothing in common with each other, and each intake cam 4,5,6,7 is stepped shape, and the thickness of each intake cam flange end is greater than the thickness of basic circle end.Like this guarantee intake cam flange end intensity and with valve between contact area in, can effectively save material, reduce cost of material, and alleviate the weight and the rotary inertia of admission cam shaft, make the admission cam shaft rotational resistance littler, effective merit volume of output is more.
Claims (4)
1, a kind of admission cam shaft structure, offer the oilhole (9) that connects its front and rear end at the center of camshaft (1), be distributed with four pairs of cams on the axle body of camshaft (1) from front to back, be respectively first intake cam (4), second intake cam (5), the 3rd intake cam (6) and the 4th intake cam (7), it is characterized in that: the rearward end at described camshaft (1) is provided with axle journal (3), this axle journal (3) forms annular boss, and the diameter of annular boss is greater than the diameter of camshaft (1) axle body; Front end and middle part at described axle journal (3) respectively are provided with a circle fin (10), form annular slot (11) between two fins (10), ear end face at described axle journal (3) offers positioning pin hole (12) forward along axis, and this positioning pin hole (12) is positioned at the next door of oilhole (9).
2, a kind of admission cam shaft structure according to claim 1, it is characterized in that: on described axle journal (3), offer the auxiliary oilhole (13) of " L " shape, an end that is somebody's turn to do auxiliary oilhole (13) is positioned at the bottom land of annular slot (11), and the other end of auxiliary oilhole (13) connects to the ear end face of axle journal (3).
3, a kind of admission cam shaft structure according to claim 1 and 2, it is characterized in that: radially offer in the position of close its front end of described camshaft (1) pin-and-hole (14) is installed, the front side of this installation pin-and-hole (14) is provided with annular shallow slot (15), and the rear side that pin-and-hole (14) is installed has a circle annular small boss (16).
4, a kind of admission cam shaft structure according to claim 1 is characterized in that: the thickness of described each intake cam (4,5,6,7) flange end is greater than the thickness of basic circle end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100703586A CN101363334B (en) | 2008-09-23 | 2008-09-23 | Admission cam shaft structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100703586A CN101363334B (en) | 2008-09-23 | 2008-09-23 | Admission cam shaft structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101363334A true CN101363334A (en) | 2009-02-11 |
| CN101363334B CN101363334B (en) | 2011-02-02 |
Family
ID=40389905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100703586A Expired - Fee Related CN101363334B (en) | 2008-09-23 | 2008-09-23 | Admission cam shaft structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101363334B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242650A (en) * | 2010-05-12 | 2011-11-16 | 朱譞晟 | Continuous variable geometric camshaft capable of being used for full-variable valve timing |
| CN102787875A (en) * | 2012-08-23 | 2012-11-21 | 东风汽车公司 | Engine camshaft with oil storage tank |
| CN102797533A (en) * | 2012-08-23 | 2012-11-28 | 东风汽车公司 | Axial positioning structure provided with oil storage tanks and arranged on engine camshaft |
| CN106121757A (en) * | 2016-08-17 | 2016-11-16 | 力帆实业(集团)股份有限公司 | Admission cam shaft of car engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19620744B4 (en) * | 1995-06-07 | 2006-02-02 | Volkswagen Ag | Device for influencing the timing of an internal combustion engine |
| US6173687B1 (en) * | 1997-11-14 | 2001-01-16 | Mitsubishi Denki Kabushiki Kaisha | Hydraulic apparatus for adjusting the timing of opening and closing of an engine valve |
| DE19820653A1 (en) * | 1998-05-08 | 1999-11-11 | Schaeffler Waelzlager Ohg | Variable valve timing for IC engine |
| CN2825966Y (en) * | 2005-08-05 | 2006-10-11 | 李云合 | Camshaft for motorcycle valve train |
| CN100510351C (en) * | 2007-09-14 | 2009-07-08 | 奇瑞汽车股份有限公司 | Continuous variable timing phase system of internal combustion engine |
| CN201269116Y (en) * | 2008-09-24 | 2009-07-08 | 力帆实业(集团)股份有限公司 | Admission cam shaft of car engine |
-
2008
- 2008-09-23 CN CN2008100703586A patent/CN101363334B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242650A (en) * | 2010-05-12 | 2011-11-16 | 朱譞晟 | Continuous variable geometric camshaft capable of being used for full-variable valve timing |
| CN102242650B (en) * | 2010-05-12 | 2015-11-25 | 朱譞晟 | Can be used for the continuous variable geometry camshaft of full Variable Valve Time |
| CN102787875A (en) * | 2012-08-23 | 2012-11-21 | 东风汽车公司 | Engine camshaft with oil storage tank |
| CN102797533A (en) * | 2012-08-23 | 2012-11-28 | 东风汽车公司 | Axial positioning structure provided with oil storage tanks and arranged on engine camshaft |
| CN102787875B (en) * | 2012-08-23 | 2014-12-17 | 东风汽车公司 | Engine camshaft with oil storage tank |
| CN106121757A (en) * | 2016-08-17 | 2016-11-16 | 力帆实业(集团)股份有限公司 | Admission cam shaft of car engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101363334B (en) | 2011-02-02 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
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Application publication date: 20090211 Assignee: Chongqing Lifan Automobile Engine Co., Ltd. Assignor: Lifan Industry (Group) Co., Ltd. Contract record no.: 2012500000074 Denomination of invention: Admission cam shaft structure Granted publication date: 20110202 License type: Exclusive License Record date: 20120725 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110202 Termination date: 20190923 |
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| CF01 | Termination of patent right due to non-payment of annual fee |