CN204002962U - The rocking arm of internal-combustion engine variable valve mechanism - Google Patents
The rocking arm of internal-combustion engine variable valve mechanism Download PDFInfo
- Publication number
- CN204002962U CN204002962U CN201420325991.6U CN201420325991U CN204002962U CN 204002962 U CN204002962 U CN 204002962U CN 201420325991 U CN201420325991 U CN 201420325991U CN 204002962 U CN204002962 U CN 204002962U
- Authority
- CN
- China
- Prior art keywords
- sidewalls
- rocking arm
- roller
- bearing pin
- rocker body
- 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.)
- Expired - Fee Related
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- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The utility model discloses a kind of rocking arm of internal-combustion engine variable valve mechanism, comprise rocker body, described rocker body comprises two sidewalls and a bridge joint gusset, and the bottom of two sidewalls is connected as a single entity by described bridge joint gusset, and the front end of two sidewalls respectively extends the lug of an arc downwards; Between the middle part of two sidewalls, be connected with the first bearing pin, sheathed the first roller on the first bearing pin; Between the rear end of two sidewalls, be connected with the second bearing pin, sheathed the second roller on the second bearing pin.The utility model greatly reduces surface friction drag, and oil-saving effect is better.Rocker body can, by stamping process straight forming, greatly reduce manufacture cost, has improved the dynamic response performance of rocking arm simultaneously.
Description
Technical field
The utility model relates to the rocking arm for internal-combustion engine variable valve mechanism.
Background technique
Continuously variable valve lift (CVVL) technology of internal-combustion engine, compared with continuous variable valve timing (CVVT) technology, has better oil-saving effect, and therefore, continuously variable valve lift technology also becomes research emphasis in recent years.
Such as Chinese invention patent application CN101446216A discloses a kind of continuous variable air valve lift apparatus, it comprises: input cam; Controlling rod running shaft; Comprise contact segment and be configured to the controlling rod of controlling rod running shaft; Control the control section of the relative angle of controlling rod and controlling rod running shaft; Be rotationally attached to the first connecting rod of controlling rod running shaft; The second connecting rod (or claiming middle lever) that is rotationally attached to first connecting rod and contact with contact segment; Be configured to the output cam of second connecting rod and opening and closing valve; And the elastic part that contacts with input cam with second connecting rod of the attachment portion that is configured so that first connecting rod.The first roller is configured to the attachment portion of first connecting rod and second connecting rod to contact with input cam, and the second roller is configured to first connecting rod to contact with contact segment.If controlling rod rotates in a clockwise direction around controlling rod running shaft, the relative angle between controlling rod running shaft, the first roller and the second roller relatively reduces, and the valve lift amount of valve and timing reduce.But if controlling rod rotates in a counter-clockwise direction around controlling rod running shaft, the relative angle between controlling rod running shaft, the first roller and the second roller relatively increases, and the valve lift amount of valve and timing increase.So this continuous variable air valve lift apparatus can change valve lift according to the control of controlling rod relative angle.
Chinese utility model patent CN203403916U also discloses a kind of cam rocker arm assembly of the variable air valve lift apparatus for motor, its rocker arm body comprises a roller, air valve bridge and two fixed plates, two fixed plates are parallel and be located at relative to one another on air valve bridge, and roller is folded between two fixed plates pivotly.Air valve bridge and two fixed plates are preferably one-body molded.Roller contacts cooperation with cam mechanism, one side of air valve bridge can be provided with fulcrum structure, the opposite side of air valve bridge coordinates with valve mechanism, particularly, the top of valve mechanism is connected or is close to the opposite side of air valve bridge (i.e. a side far away apart from fulcrum structure), cam press-on roller like this, roller drives whole rocker arm body to swing around fulcrum structure, thereby drives valve mechanism action.
In above-mentioned two documents, on disclosed rocking arm, all only has a roller, this roller is arranged on the intermediate portion of rocking arm, and for contacting with a cam of top, and roller is not all established at the two ends of rocking arm, wherein one end contacts with a fulcrum structure, and the other end is pressed on valve.Like this, mechanism is in the time of work, and sliding friction all occurs at the two ends of rocking arm, and surface friction drag is larger, affects the oil-saving effect of internal-combustion engine.In addition, in the prior art, rocker body is generally by casting or Forging Technology moulding, and large, the mach bite of weight of rocker body is also large, so not only can increase the manufacture cost of rocking arm, and can affect the dynamic response performance of rocking arm.
Model utility content
The technical problems to be solved in the utility model is to provide that a kind of surface friction drag is little, the rocking arm of the internal-combustion engine variable valve mechanism of low cost of manufacture.
In order to solve the problems of the technologies described above, the utility model adopts following technological scheme: a kind of rocking arm of internal-combustion engine variable valve mechanism, comprise rocker body, described rocker body comprises two sidewalls and a bridge joint gusset, the bottom of two sidewalls is connected as a single entity by described bridge joint gusset, and the front end of two sidewalls respectively extends the lug of an arc downwards; Between the middle part of two sidewalls, be connected with the first bearing pin, sheathed the first roller on the first bearing pin; Between the rear end of two sidewalls, be connected with the second bearing pin, sheathed the second roller on the second bearing pin.
Preferably, the end of described lug and the bottom connection of sidewall touch.
Preferably, the bottom surface of described the second roller contacts with the end face of a guide pad, and the end face of described guide pad is smooth curved surface.
More preferably, the rear end of described two sidewalls fixing muscle beam of a spring that respectively extends back, the fixing muscle beam of spring is provided with spring hanging hole, on spring hanging hole, is mounted with extension spring.
Preferably, the top of described the first roller contacts with the working curved surface of lever bottom or the working curved surface of a cam in the middle of one.
Preferably, described rocker body is by stamping process moulding.
Compared with prior art, the utlity model has following beneficial effect:
1, the utility model is in the time of work, and the second roller can roll on guide pad thereunder, and sliding friction has been become to rolling friction, greatly reduces surface friction drag, for the petrol engine of four cylinders, can have the fuel oil saving effect that exceedes 1%.
2, in the utility model, the bottom profile of lug is repeatedly the smooth segmental arc of side, the narrow steel bar bending, shaping and the refine limit straight forming that are extended by sidewall front end, lightweight, rigidity is high, its bottom surface is again through cure process, when work and the locking flat cover of valve tail end or the area of contact of flat gasket is little, frictional force is little, more wear-resisting than existing various single roller rocking arm lugs.
3, the rocker body in the utility model (comprise two side, bridge joint gusset, lug and spring fix muscle beam) can be by a sheet metal blank through stamping process straight forming, and reach finished size and the grade of tolerance, thereby the rocker body that does not resemble casting or forge, need machining cutting to remove unnecessary material, greatly reduce manufacture cost.
4, the rocker body in the utility model can be directly by steel plate punched moulding, between two side, except bridge joint gusset is connected with two bearing pins, there is no unnecessary material, lightweight, and the structural rigidity of whole rocking arm is but than the height of casting or forging, has improved the dynamic response performance of rocking arm.
Brief description of the drawings
Fig. 1 is the perspective view of the rocking arm of a kind of internal-combustion engine variable valve mechanism of the utility model.
Fig. 2 is the plan view of the utility model rocking arm.
Fig. 3 is the plan view of the utility model rocking arm.
Mark in figure:
1, sidewall
2, the first roller
3, bridge joint gusset
4, sidewall
5, lug
6, the first bearing pin
7, the second bearing pin
8, the fixing muscle beam of spring
9, the second roller
10, rocking arm
11, guide pad
12, the bottom surface of guide pad
13, the end face of guide pad
14, spring hanging hole
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.These mode of executions are only for the utility model is described, and are not limitation of the utility model.
In description of the present utility model, it should be noted that, orientation or the position relationship of instruction such as term 'fornt', 'back', " top ", " end " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, construct and operation with specific orientation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second " be only for describing object, and can not be interpreted as instruction or hint relative importance.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly.For the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term in the utility model.
As shown in Figure 1-Figure 3, the rocking arm 10 of a kind of internal-combustion engine variable valve mechanism of the utility model comprises rocker body and two rollers.Wherein, rocker body comprises two sidewalls 1,4 and a bridge joint gusset 3, these two sidewalls 1,4 arrange substantially in parallel, and the bottom of two sidewalls 1,4 is connected as a single entity by described bridge joint gusset 3; therefore, can think that two sidewalls 1,4 and joint 3 are integrated by same material.The front end of two sidewalls 1,4 respectively extends the lug 5 of an arc downwards, one is preferred embodiment, lug 5 is bent downwardly and is formed by the elongated material of a section of sidewall 1,4 front ends, and the end of lug 5 bends towards the middle part of sidewall 1,4, and touches with the bottom connection of sidewall 1,4.The bottom profile of lug 5 is the smooth segmental arcs by repeatedly square curve forms.
Between the middle part of two sidewalls 1,4, be connected with sheathed the first roller 2 on the first bearing pin 6, the first bearing pins 6.In variable valve actuator for air, the working curved surface close contact of the first roller 2 middle lever bottom above with it under the effect of spring force also can freely rotate neatly; Or as above-mentioned patent CN203403916U, the first roller 2 contacts with the working curved surface of a cam, and effect and the matching relationship of the first roller 2 in variable valve actuator for air is same as the prior art, and therefore not to repeat here.
Parallel sheathed the second roller 9 on the second bearing pin 7 with the first bearing pin 6 and be connected with the second bearing pin 7, the second bearing pins 7 between the rear end of two sidewalls 1,4.Preferably, as shown in Figure 2, the bottom surface of the second roller 9 contacts with a guide pad 11, and the end face 13 of this guide pad continuous smooth curved surface that repeatedly square curve forms of serving as reasons, for contacting with the second roller 9; The bottom surface 12 of guide pad is the plane with pit, for matching with the top bulb of the hydraulic lash adjuster (HLA) of IC engine cylinder head.
In preferred embodiment of the present utility model, the rear end of described two sidewalls 1, the 4 fixing muscle beam 8 of a spring that also respectively extends back, the fixing muscle beam 8 of spring is provided with spring hanging hole 14, on spring hanging hole 14, be mounted with extension spring (not shown), the other end of extension spring is fixed on cylinder of internal combustion engine and covers.Under the pulling force effect applying in this extension spring, the second roller 9 fits tightly on the end face 13 of guide pad 11, and the second roller 9 can be along guide pad end face 13 left and right reciprocating rolling neatly under the driving of eccentricity control axle.In the time that the camshaft of internal-combustion engine rotates, the lifting curve of the middle lever transmission cam of variable valve actuator for air, the first roller 2 of the utility model rocking arm is servo-actuated along the bottom smooth surface of middle lever, the second roller 9 is along end face 13 continuous rollings of guide pad 11, cause lug 5 to produce motion at above-below direction, thereby regulated continuously valve lift.
Preferably, the rocker body in the utility model is by the direct impact briquetting of a block plate blank.Stamping forming rocker body, between two side except bridge joint gusset 3 is connected with two bearing pins 6,7, can not resemble casting or the rocker body of Forging Technology moulding and have unnecessary material, thereby weight is lighter, but the structural rigidity of whole rocking arm, but than the height of casting or forging, has improved the dynamic response performance of rocking arm.
The two side 1,4 of rocker body, bridge joint gusset 3, the fixing muscle beam 8 of spring and lug 5 go out finished size and the grade of tolerance by a sheet metal through stamping process straight formings such as blanking, punching, bending, shaping, refine limits, not resembling casting or the rocker body of Forging Technology moulding like that needs the unnecessary material of machining cutting removal subsequently, thereby greatly reduces manufacture cost.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model know-why; can also make some improvement and replacement, these improvement and replacement also should be considered as protection domain of the present utility model.
Claims (6)
1. the rocking arm of an internal-combustion engine variable valve mechanism, comprise rocker body, it is characterized in that, described rocker body comprises two sidewalls (1,4) and one bridge joint gusset (3), the bottom of two sidewalls (Isosorbide-5-Nitrae) is connected as a single entity by described bridge joint gusset (3), the front end of two sidewalls (Isosorbide-5-Nitrae) respectively extends the lug (5) of an arc downwards; Between the middle part of two sidewalls (Isosorbide-5-Nitrae), be connected with the first bearing pin (6), upper sheathed the first roller (2) of the first bearing pin (6); Between the rear end of two sidewalls (Isosorbide-5-Nitrae), be connected with the second bearing pin (7), upper sheathed the second roller (9) of the second bearing pin (7).
2. rocking arm according to claim 1, is characterized in that, the bottom connection of the end of described lug (5) and sidewall (Isosorbide-5-Nitrae) touches.
3. rocking arm according to claim 1, it is characterized in that, the bottom surface of described the second roller (9) contacts with the end face (13) of a guide pad (11), and the end face (13) of described guide pad (11) is smooth curved surface.
4. rocking arm according to claim 3, it is characterized in that, described two sidewalls (1,4) the rear end fixing muscle beam (8) of a spring that respectively extends back, the fixing muscle beam (8) of spring is provided with spring hanging hole (14), and spring hanging hole is mounted with extension spring on (14).
5. rocking arm according to claim 1, is characterized in that, the top of described the first roller (2) contacts with the working curved surface of lever bottom or the working curved surface of a cam in the middle of one.
6. rocking arm according to claim 1, is characterized in that, described rocker body is by stamping process moulding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420325991.6U CN204002962U (en) | 2014-06-18 | 2014-06-18 | The rocking arm of internal-combustion engine variable valve mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420325991.6U CN204002962U (en) | 2014-06-18 | 2014-06-18 | The rocking arm of internal-combustion engine variable valve mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204002962U true CN204002962U (en) | 2014-12-10 |
Family
ID=52042980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420325991.6U Expired - Fee Related CN204002962U (en) | 2014-06-18 | 2014-06-18 | The rocking arm of internal-combustion engine variable valve mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204002962U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111945800A (en) * | 2019-05-16 | 2020-11-17 | 安百拓（南京）建筑矿山设备有限公司 | Laminated rocker arm |
-
2014
- 2014-06-18 CN CN201420325991.6U patent/CN204002962U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111945800A (en) * | 2019-05-16 | 2020-11-17 | 安百拓（南京）建筑矿山设备有限公司 | Laminated rocker arm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20190618 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |