CN203559944U - Assembled camshaft - Google Patents
Assembled camshaft Download PDFInfo
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- CN203559944U CN203559944U CN201320599333.1U CN201320599333U CN203559944U CN 203559944 U CN203559944 U CN 203559944U CN 201320599333 U CN201320599333 U CN 201320599333U CN 203559944 U CN203559944 U CN 203559944U
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- cam
- camshaft
- boss
- oil duct
- cavity
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Abstract
The utility model discloses an assembled camshaft, and relates to an engine component. The assembled camshaft is designed for improving the performance of an engine better. The embodiment of the utility model provides the assembled camshaft which comprises a camshaft and a rotating driving mechanism; the first cam is fixedly sheathed on the camshaft; a second cam is rotationally sheathed on the camshaft; the first cam is used for driving an air door to open or close; the second cam is used for driving another air door to open or close; the first cam and the second cam are same-cylinder and same-name cams; the rotating driving mechanism is used for driving the second cam to rotate by a preset angle around the camshaft. The assembled camshaft is mainly used for an air distribution mechanism of an engine.
Description
Technical field
The utility model relates to engine components, relates in particular to a kind of assembled camshaft.
Background technique
Distribution device is an important mechanism of motor, its effect is according to the work cycle of carrying out in each cylinder of motor and the requirement of firing order, time opening and the inlet and outlet door of closing each cylinder, make the inflammable mixture of fresh charge be entered in time cylinder, waste gas after burning is able to from cylinder, discharge in time, realizes gas exchange process.Nowadays, in order to make motor there is reasonable power character, fuel consumption and emission characteristic, each cylinder of motor arranges a plurality of intake valves and a plurality of exhaust valve conventionally, comparatively commonly two intake valves and two exhaust valves, inlet and outlet door is rotarilyd actuate by the different cams on camshaft respectively, to realize the opening and closing of valve.
In order to reach port timing and the valve lift of motor the best, so that the power character of motor, fuel consumption and emission characteristic reach best, present most of motor has adopted VVT(Variable Valve Timing, Variable Valve Time) and VVL(Variable Valve Lift, lift range variable) technology.For VVT technology, it is by OCV(Oil Control Valve, OCV Oil Control Valve) and VVT phase discriminator control moment of the rotation angle adjusting valve opening of inlet and outlet camshaft; For VVL technology, thereby it controls by camshaft control mechanism the lift that cam lift regulates valve.
And no matter adopt VVT technology or VVL technology, be all drive two intake valves (or two exhaust valves) be all open simultaneously and and close, but can not adjust like this strength of vortex of air inlet (or exhaust) in cylinder, the effect that causes fuel oil and gas to mix is undesirable, reduce fuel oil, thereby reduce the performance of motor.
Model utility content
Embodiment of the present utility model provides a kind of assembled camshaft, can improve preferably the performance of motor.
For achieving the above object, embodiment of the present utility model adopts following technological scheme:
The utility model embodiment provides a kind of assembled camshaft, comprising:
Camshaft, on it, be installed with the first cam, and be rotatably arranged with the second cam, described the first cam is for driving the opening and closing of a valve, described the second cam is for driving the opening and closing of another valve, and described the first cam and described the second cam are same cylinder cam of the same name;
Rotary drive mechanism, it is for driving described the second cam to rotate default angle around described camshaft.
Further, on described camshaft, be installed with stator, sheathed described the second cam rotatably on described stator.
Particularly, on the inner ring surface of described the second cam, be interval with a plurality of the first boss, the outer ring surface of described stator is provided with a plurality of the second boss, and described in each, the second boss is between two adjacent described the first boss, and described in each, the second boss withstands the inner ring surface of described the second cam;
Described two boss be adjacent one of them described in form between the first boss the first cavity and be adjacent another described in form the second cavity between the first boss.
Further, described rotary drive mechanism is hydraulic drive mechanism, specifically comprise described the first cavity, described the second cavity, the first oil duct, the second oil duct and selector valve, described the first cavity is communicated with described the first oil duct, described the second cavity is communicated with described the second oil duct, described the first oil duct is connected described selector valve with in described the second oil duct, and described selector valve is for open and close described the first oil duct and described the second oil duct simultaneously.
Particularly, the two ends of described the second cam are respectively equipped with the first seal ring and the second seal ring being enclosed within on described camshaft, described the first seal ring and described the second seal ring described the second boss is adjacent one of them described between the first boss sealing form described the first cavity, and described the second boss is adjacent another described between the first boss sealing form described the second cavity.
Wherein, described stator is provided with the first through hole being communicated with described the first cavity, and described the first through hole is communicated with described the first oil duct.
Further, on described camshaft, offer central tube, described central tube is provided with the third through-hole being communicated with described the first through hole, and described central tube is communicated with described the first oil duct.
Wherein, described stator is provided with the second through hole being communicated with described the second cavity, and described the second through hole is communicated with described the second oil duct.
Further, on described camshaft, be installed with axle journal, an end face of described axle journal is close to an end face of described stator, and described axle journal is provided with the fourth hole being communicated with described the second through hole, and described fourth hole is communicated with described the second oil duct.
Wherein, on described axle journal, along it, be circumferentially with annular groove, described annular groove is communicated with described fourth hole.
The assembled camshaft that the utility model embodiment provides, comprise camshaft and rotary drive mechanism, on described camshaft, be installed with the first cam, and on described camshaft, be rotatably arranged with the second cam, described the first cam is for driving the opening and closing of a valve, described the second cam is for driving the opening and closing of another valve, described the first cam and described the second cam are same cylinder cam of the same name, the first cam and the second cam-actuated valve are intake valve or exhaust valve, because can driving described the second cam, rotary drive mechanism rotates default angle around described camshaft, therefore the second cam can be at a certain angle with the first cam-shaped after camshaft rotates, when camshaft rotates, by the first cam-actuated valve with different by the opening time of the second cam-actuated valve, realize the asynchronous unlatching of different air valve, can adjust into, the strength of vortex of exhaust, strengthen the effect that fuel oil and gas mix, improve fuel oil, thereby improve the performance of motor.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The schematic diagram of the assembled camshaft that Fig. 1 provides for the utility model embodiment;
The decomposing schematic representation of the assembled camshaft that Fig. 2 provides for the utility model embodiment.
The cross-sectional schematic of the assembled camshaft that Fig. 3 provides for the utility model embodiment;
The structural representation of the second cam in the assembled camshaft that Fig. 4 provides for the utility model embodiment;
Fig. 5 is the second cam and the stator assembling cross-sectional schematic of assembled camshaft in Fig. 4;
Fig. 6-Fig. 7 is the schematic diagram that the second cam rotates with respect to camshaft;
The working principle schematic diagram of the assembled camshaft that Fig. 8 provides for the utility model embodiment.
Reference character:
1-camshaft, 10-central tube, 11-third through-hole, 2-the first cam, 3-the second cam, 30-the first boss, 31-bolt hole, 32-the first cavity, 33-the second cavity, 4-stator, 40-the second boss, 41-the first through hole, 42-the second through hole, 5-axle journal, 50-annular groove, 51-fourth hole, 6-the first seal ring, 7-the second seal ring, 8-selector valve
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiments.Embodiment based in the utility model, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope that the utility model is protected.
The structural representation of the assembled camshaft that Fig. 1 provides for the utility model.Shown in Fig. 1, this assembled camshaft comprises:
Camshaft 1, on it, be installed with the first cam 2, and be rotatably arranged with the second cam 3, the first cam 2 is for driving the opening and closing of a valve, the second cam 3 is for driving the opening and closing of another valve, wherein the first cam 2 and described the second cam 3 are same cylinder cam of the same name, and the valve that the first cam 2 and the second cam 3 drive is intake valve or exhaust valve;
Rotary drive mechanism, it is for driving the second cam 3 around the default angle of camshaft 1 rotation.
According to foregoing, can know, because rotary drive mechanism can drive the second cam 3 around the default angle of camshaft 1 rotation, therefore the second cam 3 can be at a certain angle with the first cam 2 shapes after camshaft 1 rotation, when camshaft 1 rotation, the valve being driven by the first cam 2 is different with the opening time of the valve being driven by the second cam 3, realize the asynchronous unlatching of different air valve, can adjust the strength of vortex of inlet and outlet, strengthen the effect that fuel oil and gas mix, improve fuel oil, thereby improve the performance of motor.
For being set in cam at the second cam 3, can be to be enclosed within on camshaft 1 by stator 4, as shown in Figures 2 and 3, on camshaft 1, be installed with stator 4, sheathed described the second cam 3 rotatably on this stator 4, can be to be also but directly enclosed within on camshaft 1, the present embodiment be usingd the former as a kind of optional scheme.
For the rotatable concrete structure being set on stator 4 of the second cam 3, first referring to Fig. 4, on the inner ring surface of the second cam 3, be interval with a plurality of the first boss 30, again referring to Fig. 5-Fig. 7, the outer ring surface of stator 4 is provided with a plurality of the second boss 40, each second boss 40 is between two the first adjacent boss 30, and each the second boss 40 withstands the inner ring surface of the second cam 3, between one of them first boss 30 that each second boss 40 is adjacent, form the first cavity 32, and form the second cavity 33 between another first boss 30 being adjacent, each in stator 4 the second boss 40 is with respect to the second cam 3 reciprocating rotation between two adjacent the first boss 30 like this, thereby realize rotatablely moving of the second cam 3.
A plurality of the first boss 30 can be to be evenly distributed on the inner ring surface of the second cam 3, for example, when being uniformly distributed three the first boss 30, angle between each first boss 30 is 120 °, accordingly, the quantity of the second boss 40 on stator 4 outer ring surfaces is also three, and now the angle of the rotation of the second cam 3 is less than 120 °.It should be noted that, for the ease of understanding, below all take equally distributed three the first boss 30 and be specifically described as example.
The angle of certain the second cam 3 rotations is not to be the bigger the better, and two intake valves or two exhaust valves between opening time difference be not to be the bigger the better yet, opening time difference should be within rational scope, to guarantee that the fuel consumption and emission characteristic of motor reaches preferable states, therefore the default angle of the second cam 3 can be 0～60 °.Because the different angle of the second cam 3 rotation can make the opening time of two intake valves or two exhaust valves poor different, therefore for its concrete value, should specifically set according to the opening time of different air valve, at this, do not do concrete restriction.
The rotary drive mechanism that the utility model embodiment provides can be hydraulic drive mechanism, in conjunction with Fig. 8, it is specifically except comprising above-mentioned the first cavity 32 of mentioning and the second cavity 33, also comprise the first oil duct, the second oil duct and selector valve 8, the first cavity 32 is communicated with the first oil duct, the second cavity 33 is communicated with the second oil duct, the first oil duct with in the second oil duct, be connected described selector valve 8, selector valve 8 can be OCV, 3-position 4-way solenoid directional control valve for example, this selector valve 8 is for open and close the first oil duct and the second oil duct simultaneously.Wherein, when selector valve 8 is opened, one of them oil duct is that oil input channel, another oil duct are back oil road.
Again consult Fig. 6, before the second cam 3 rotation, selector valve 8 is closed condition, now in the second cavity 33, is full of fluid, the effect by oil pressure the second boss 40 is leaned against to first boss 30 being adjacent; Consult Fig. 7, when selector valve 8 is opened the first oil duct and the second oil duct simultaneously, the first oil duct is oil input channel, and the second oil duct is back oil road, and now the fluid in the second cavity 33 is by the second oil duct oil return, and oil pressure in the first cavity 32 increases gradually, and the first boss 30 is produced and promotes pressure, thereby the second cam 3 is turned an angle, make between the second cam 3 and the first cam 2 angulation poor, then close selector valve 8, now the second cam 3 can not rotate with respect to camshaft 1.When camshaft 1 rotates, when can realizing difference, the valve being driven by the first cam 2 and the valve being driven by the second cam 3 open, realize lift range variable and Variable Valve Time.
It will be appreciated by persons skilled in the art that the first oil duct and the second oil duct can be formed in the airframe structure of motor by casting technique.
The structure of above-mentioned the first cavity 32 and the second cavity 33 can be to form in the following manner: as shown in Figures 2 and 3, at the two ends of the second cam 3, be respectively equipped with the first seal ring 6 and the second seal ring 7 that are enclosed within on camshaft 1, be that between one of them first boss 30 the second boss 40 being adjacent for the first seal ring 6 and the second seal ring 7, sealing forms the first cavity 32 like this, and between another first boss 30 that the second boss 40 is adjacent, sealing form the second cavity 33 shown in Fig. 7.Wherein the first seal ring 6 and the second seal ring 7 can be fixed on the second cam 3 by links such as bolts.
As the another kind of optional scheme of the utility model embodiment, for the connectivity structure of the first cavity 32 and the first oil duct and the second cavity 33 and the second oil duct connectivity structure, can be: on stator 4, be provided with the first through hole 41 being communicated with the first cavity 32 and the second through hole 42 being communicated with the second cavity 33, wherein the first through hole 41 is communicated with the first oil ducts; The second through hole 42 is directly communicated with the second oil duct.
As the another kind of optional scheme of the utility model embodiment, can also be: on stator 4, be provided with the first through hole 41 being communicated with the first cavity 32 and the second through hole 42 being communicated with the second cavity 33, camshaft 1 is provided with central tube 10, central tube 10 can be provided with the fourth hole being communicated with the second through hole 42, and central tube 10 is communicated with the second oil duct.
As another optional or a kind of more preferred scheme of the utility model embodiment, can also be with reference to the structure shown in Fig. 3: on stator 4, be provided with the first through hole 41 being communicated with the first cavity 32, and at the second through hole 42 being communicated with the second cavity 33, camshaft 1 is provided with central tube 10(camshaft 1 and is open column shape), central tube 10 is provided with the third through-hole 11 being communicated with the first through hole 41, and central tube 10 is communicated with the first oil duct, be not easy to sometimes process fourth hole being on the camshaft 1 of hollow shape, for this reason, can on camshaft 1, be installed with axle journal 5, axle journal 5 is provided with fourth hole 51, and an end face of axle journal 5 is near an end face of stator 4, so that the second through hole 42 is communicated with fourth hole 51, fourth hole 51 is communicated with the second oil duct, the first oil duct is connected selector valve 8 with the second oil duct.Wherein axle journal 5 can be one-body molded with camshaft 1, can be to be also fixedly connected with, and such as being similar to the means of fixation of stator 4, the mode by hot pressing is fixed on camshaft 1.
The better oil-feed of fluid or oil return in order to make to flow out from the fourth hole 51 of axle journal 5, be circumferentially with annular groove 50 along it on axle journal 5, and as shown in Figure 1-Figure 3, the side of annular groove 50 is provided with the fourth hole 51 being communicated with the second through hole 42, as shown in Figure 8.
In conjunction with aforementioned content, the assembly technology of the assembled camshaft in the utility model embodiment is: the first cam 2 and axle journal 5 are heated to press-fit respectively the place, different fixed position to camshaft 1 behind 200 ℃ of left and right, then the first seal ring 6 is enclosed within on axle journal 5 to the one end away from the first cam 2, again stator 4 is heated to press-fit on camshaft 1 behind 200 ℃ of left and right, wherein, between the first cam 2 and stator 4, press axle journal 5, and the first seal ring 6 is near stator 4, the second cam 3 is finally installed, the second seal ring 7, by screw bolt and nut successively by the bolt hole of the first seal ring 6 (in figure note), the bolt hole 31 of the second cam 3, and the bolt hole of the second seal ring 7 (not noting in figure) is fixedly connected with, thereby form the first cavity 32 and second cavity 33 of sealing, can realize this second cam 3 with respect to the rotation of camshaft 1 simultaneously.
More than can find out, the first cam 2, the second cam 3, axle journal 5 and 4 needs of stator complete assembling on camshaft 1, and this Combined cam axle construction is had can manufacture type and assembling capacity.
Below in conjunction with Fig. 6-Fig. 8 and foregoing, the working procedure of the utility model embodiment's assembled camshaft is described:
When OCV(example 3-position 4-way solenoid directional control valve as shown in FIG.) while opening the first oil duct and the second oil duct simultaneously, the first oil duct is oil input channel, the second oil duct is back oil road, now the fluid in the second cavity 33 flows in the annular groove 50 of axle journal 5 by the second through hole 42, fourth hole 51 successively, and then flows back in engine cylinder cover or engine crankcase etc. from the second oil duct.Meanwhile, fluid in the first oil duct enters in the first cavity 32 by central tube 10, third through-hole 11 and the first through hole 41 successively, oil pressure in the first cavity 32 increases gradually, and the first boss 30 is produced and promotes pressure, thereby the second cam 3 is turned an angle, make between the second cam 3 and the first cam 2 angulation poor; Then close OCV, now the second cam 3 can not rotate with respect to camshaft 1.When camshaft 1 rotates, when the valve being driven by the first cam 2 is different with the valve being driven by the second cam 3, open, and then realize lift range variable and Variable Valve Time.Wherein, at fluid, enter in the process of the first cavity 32, the oil mass of controlling the first cavity 32 and the second cavity 33 by OCV is controlled the rotation angle of the second cam 3, to realize the valve being driven by the second cam 3, be to open in advance or postpone and closing, and then realize the conversion of port timing, thereby realize the inlet and outlet amount of motor the best, promote power character, the fuel consumption and emission of motor.
The assembled camshaft that the utility model embodiment provides can be applied in the gas distribution structure of different setting types, as camshaft 1 up-set type distribution device, camshaft 1 middle distribution device and camshaft 1 underneath type valve mechanism etc.
Those skilled in the art can know, distribution device generally includes valve group and valve transmission group, and valve group comprises valve, air valve seat ring, valve guide bushing, valve spring, cotter seat and valve collet etc.; Valve transmission group comprises camshaft, cam, tappet, push rod, rocking arm, pitman arm shaft, rocker shaft bed and valve adjusting screw etc.
Above; it is only embodiment of the present utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (10)
1. an assembled camshaft, is characterized in that, comprising:
Camshaft, on it, be installed with the first cam, and be rotatably arranged with the second cam, described the first cam is for driving the opening and closing of a valve, described the second cam is for driving the opening and closing of another valve, and described the first cam and described the second cam are same cylinder cam of the same name;
Rotary drive mechanism, it is for driving described the second cam to rotate default angle around described camshaft.
2. assembled camshaft according to claim 1, is characterized in that, on described camshaft, is installed with stator, sheathed described the second cam rotatably on described stator.
3. assembled camshaft according to claim 2, it is characterized in that, on the inner ring surface of described the second cam, be interval with a plurality of the first boss, the outer ring surface of described stator is provided with a plurality of the second boss, described in each, the second boss is between two adjacent described the first boss, and described in each, the second boss withstands the inner ring surface of described the second cam;
Described the second boss be adjacent one of them described in form between the first boss the first cavity and be adjacent another described in form the second cavity between the first boss.
4. assembled camshaft according to claim 3, it is characterized in that, described rotary drive mechanism is hydraulic drive mechanism, specifically comprise described the first cavity, described the second cavity, the first oil duct, the second oil duct and selector valve, described the first cavity is communicated with described the first oil duct, described the second cavity is communicated with described the second oil duct, described the first oil duct is connected described selector valve with in described the second oil duct, and described selector valve is for open and close described the first oil duct and described the second oil duct simultaneously.
5. assembled camshaft according to claim 4, it is characterized in that, the two ends of described the second cam are respectively equipped with the first seal ring and the second seal ring being enclosed within on described camshaft, described the first seal ring and described the second seal ring described the second boss is adjacent one of them described between the first boss sealing form described the first cavity, and described the second boss is adjacent another described between the first boss sealing form described the second cavity.
6. assembled camshaft according to claim 4, is characterized in that, described stator is provided with the first through hole being communicated with described the first cavity, and described the first through hole is communicated with described the first oil duct.
7. assembled camshaft according to claim 6, is characterized in that, on described camshaft, offers central tube, and described central tube is provided with the third through-hole being communicated with described the first through hole, and described central tube is communicated with described the first oil duct.
8. assembled camshaft according to claim 4, is characterized in that, described stator is provided with the second through hole being communicated with described the second cavity, and described the second through hole is communicated with described the second oil duct.
9. assembled camshaft according to claim 8, it is characterized in that, on described camshaft, be installed with axle journal, one end face of described axle journal is close to an end face of described stator, and described axle journal is provided with the fourth hole being communicated with described the second through hole, described fourth hole is communicated with described the second oil duct.
10. assembled camshaft according to claim 9, is characterized in that, on described axle journal, along it, is circumferentially with annular groove, and described annular groove is communicated with described fourth hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320599333.1U CN203559944U (en) | 2013-09-26 | 2013-09-26 | Assembled camshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320599333.1U CN203559944U (en) | 2013-09-26 | 2013-09-26 | Assembled camshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203559944U true CN203559944U (en) | 2014-04-23 |
Family
ID=50509671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320599333.1U Expired - Fee Related CN203559944U (en) | 2013-09-26 | 2013-09-26 | Assembled camshaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203559944U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150581A (en) * | 2015-03-27 | 2016-11-23 | 长城汽车股份有限公司 | For the cam assembly of valve actuating mechanism and electromotor and the vehicle with it |
| CN109083707A (en) * | 2018-09-25 | 2018-12-25 | 浙江吉利罗佑发动机有限公司 | Camshaft, engine and automobile for cylinder deactivation of engine |
| CN112096474A (en) * | 2020-08-14 | 2020-12-18 | 东风汽车集团有限公司 | Variable wrap angle combined camshaft, engine and automobile |
| CN112282882A (en) * | 2020-11-30 | 2021-01-29 | 一汽解放汽车有限公司 | Camshaft assembly for controlling engine cylinder valve and vehicle |
-
2013
- 2013-09-26 CN CN201320599333.1U patent/CN203559944U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150581A (en) * | 2015-03-27 | 2016-11-23 | 长城汽车股份有限公司 | For the cam assembly of valve actuating mechanism and electromotor and the vehicle with it |
| CN109083707A (en) * | 2018-09-25 | 2018-12-25 | 浙江吉利罗佑发动机有限公司 | Camshaft, engine and automobile for cylinder deactivation of engine |
| CN112096474A (en) * | 2020-08-14 | 2020-12-18 | 东风汽车集团有限公司 | Variable wrap angle combined camshaft, engine and automobile |
| CN112096474B (en) * | 2020-08-14 | 2022-02-01 | 东风汽车集团有限公司 | Variable wrap angle combined camshaft, engine and automobile |
| CN112282882A (en) * | 2020-11-30 | 2021-01-29 | 一汽解放汽车有限公司 | Camshaft assembly for controlling engine cylinder valve and vehicle |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140423 Termination date: 20210926 |