CN105569756A - Diesel engine single overhead camshaft driven valve rocker mechanism - Google Patents
Diesel engine single overhead camshaft driven valve rocker mechanism Download PDFInfo
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- CN105569756A CN105569756A CN201510118563.5A CN201510118563A CN105569756A CN 105569756 A CN105569756 A CN 105569756A CN 201510118563 A CN201510118563 A CN 201510118563A CN 105569756 A CN105569756 A CN 105569756A
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- rocker
- rocking arm
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Abstract
The invention discloses a diesel engine single overhead camshaft driven valve rocker mechanism. The mechanism comprises an exhaust rocker, an intake rocker, rocker ball heads, rocker ball head seats, a rocker shaft, rocker rolling pins, a rocker shaft seat and rocker rolling columns, wherein the rocker ball head seats sleeves the rocker ball heads; the threaded ends of the rocket ball heads are screwed in the threaded holes at the valve ends of the rockers; nuts are arranged at the tops of the threaded ends, exposed from the end faces of the rockers, of the rocker ball heads; the rocker rolling columns are arranged in slots at the cam ends of the rockers and are integrally connected with the rockers through the rocker rolling pins which are inserted in the inner holes at the cam ends of the rockers; a positioning pin is mounted on the bottom surface of the rocker shaft seat, an intake rocker mounting groove and an exhaust rocker mounting groove are milled in the top surface of the rocker shaft seat, and rocker shaft seat fixing bolts are arranged on the bottom surfaces of the grooves; the rocker shaft consists of a mounting boss in the middle and fixed shafts of the intake rocker and exhaust rocker at the two ends, and the both the two shaft ends are milled in the horizontal direction; the intake rocker and the exhaust rocker are respectively sleeved at two ends of the rocker shaft; and three bolts respectively penetrate through the two ends and the middle parts of the rocker shaft so as to fix the rocker shaft at the upper top surface of the rocker shaft seat and then the rocker shaft seat is positioned by the positioning pin.
Description
Technical field
The invention belongs to field of internal combustion engine, relate to a kind of arranged on top of diesel engine single camshaft and drive Valve Rocker Organization.
Background technique
At present, China is more and more stricter for the emission request of vehicle, and the application of vehicle exhaust after-treatment device is more and more extensive, and also more and more higher to the requirement of engine compartment space availability ratio, these are all had higher requirement to the design of diesel engine.Common crest places the cam axle construction, amount of parts is many, each assembly processing of mechanism and assembly technology complexity, and manufacture difficulty is large; Mechanism's axial height and horizontal width are all comparatively large, add height and the width dimensions of Diesel Engine Complete Machine.And traditional mid-camshaft drive is due to complex structure, component are more, dismounting inconvenience, and control accuracy is poor, cannot meet the requirement of diesel engine height rotating speed, high strengthening.Therefore, design a kind of SOHC Single Overhead Camshaft and Rocker arm assembly structure, effectively can shorten height dimension and the horizontal width of Valve Gear of Diesel, both ensure that the reliability of rocker arm body work, durability, accuracy and conformity, meet again the global design requirement of compact structure.
Summary of the invention
The object of the present invention is to provide the arranged on top of diesel engine single camshaft driving Valve Rocker Organization of a kind of compact structure, accurate positioning, reliable operation, to overcome the deficiencies in the prior art.
Technological scheme of the present invention is: arranged on top of diesel engine single camshaft drives Valve Rocker Organization, comprising: exhaust rocker arm, nut, intake rocker, rocking arm bulb, rocking arm ball cup, pitman arm shaft, patch, rocking arm rolling pin, the first locating stud, rocker shaft bed, the second locating stud, rocker shaft bed set screw, rocking arm roller and bolt; Rocking arm ball cup is sleeved on rocking arm bulb, rocking arm bulb in rocking arm ball cup rotatable freely; The threaded end of rocking arm bulb is screwed in the tapped hole of rocking arm valve end, and nut is arranged on the threaded end top that rocking arm bulb exposes rocking arm end face; Rocking arm roller is arranged in the fluting of rocker cam end, is combined as a whole by the rocking arm rolling pin and rocking arm inserting rocker cam end endoporus; The second locating stud is installed in rocker shaft bed bottom surface, and end face mills out intake rocker, exhaust rocker arm mounting groove, and groove bottom installs rocker shaft bed set screw, and axial constraint is carried out to intake rocker, exhaust rocker arm in groove side; Pitman arm shaft is made up of the installation base of centre and the intake rocker at two ends, the stationary axle of exhaust rocker arm, and the equal substantially horizontal milling of two axial ends is put down; Intake rocker and exhaust rocker arm are set in pitman arm shaft two ends; Three bolts are each passed through two ends and the middle part of pitman arm shaft, pitman arm shaft are fixed on the upper end face of rocker shaft bed, and locate with the first locating stud.
The intake rocker at pitman arm shaft two ends and exhaust rocker arm 1 stationary axle adopt decentraction structure, and the distance pulled open along vertical crankshaft axial direction ensures that intake rocker and exhaust rocker arm have identical Rocker Ratio and can be arranged on Same Part.
Pitman arm shaft is furnished with axial through horizontal oil duct A and is communicated with the vertical oil duct of bottom surface and horizontal oil duct; The patch shutoff of horizontal oil duct two ends, vertical oil duct and rocker shaft bed upper-end surface oilhole through, the shunting oil duct of horizontal oil duct A, with the oil duct on inlet and outlet rocking arm, center deviation apart from being 3 ± 0.2mm.
Following beneficial effect can be reached after the present invention adopts technique scheme: this arranged on top of diesel engine single camshaft drives Valve Rocker Organization, compact structure, and intensity is high, easy accessibility, run accurately reliable.Each part is easy to manufacturing.Mechanism's boundary dimension is little, effectively can reduce height and the width of Diesel Engine Complete Machine.Rational oil circuit is arranged, effectively can ensure lubrication, reduce the wearing and tearing between each part, improves the working life of part.
Accompanying drawing explanation
Fig. 1 is the assembly structure schematic diagram that arranged on top of diesel engine single camshaft of the present invention drives Valve Rocker Organization.
Fig. 2 is the lubricating oil path schematic diagram that arranged on top of diesel engine single camshaft of the present invention drives Valve Rocker Organization.
Fig. 3 be arranged on top of diesel engine single camshaft of the present invention drive Valve Rocker Organization internal lubrication oil circuit profile stretch-out view.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further: as shown in Fig. 1 ~ 3, arranged on top of diesel engine single camshaft drives Valve Rocker Organization, comprising: exhaust rocker arm 1, nut 2, intake rocker 3, rocking arm bulb 4, rocking arm ball cup 5, pitman arm shaft 6, patch 7, rocking arm rolling pin 8, first locating stud 9, rocker shaft bed 10, second locating stud 11, set screw 12, rocking arm roller 13 and bolt 14; Rocking arm ball cup 5 is sleeved on rocking arm bulb 4, and the top of rocking arm ball cup 5 is shaped with rocking arm bulb 4 profile extrusion, rocking arm bulb 4 rocking arm ball cup 5 in rotatably freely.Be screwed into by the threaded end of rocking arm bulb 4 in the tapped hole of rocking arm valve end, nut 2 is arranged on the threaded end top that rocking arm bulb 4 exposes rocking arm end face.Rocking arm roller 13 is arranged in the fluting of rocker cam end, is combined as a whole with rocking arm by the rocking arm rolling pin 8 inserting rocker cam end endoporus.The second locating stud 11 is installed in rocker shaft bed 10 bottom surface, and end face mills out intake rocker 3, exhaust rocker arm 1 mounting groove, and groove bottom installs rocker shaft bed set screw 12, and axial constraint is carried out to intake rocker 3, exhaust rocker arm 1 in groove side.Pitman arm shaft 6 is made up of the intake rocker 3 at the installation base of centre and two ends, exhaust rocker arm 1 stationary axle, and the equal substantially horizontal milling of two axial ends is put down.Intake rocker 3 and exhaust rocker arm 1 are set in pitman arm shaft 6 two ends.Three bolts 14 are each passed through two ends and the middle part of pitman arm shaft 6, pitman arm shaft 6 are fixed on the upper end face of rocker shaft bed 10, and locate with the first locating stud 9, and this mounting type effectively can ensure reliability and the accuracy of pitman arm shaft 6.Two rocking arm mounting grooves that rocker shaft bed 10 mills out, reduce the setting height(from bottom) of pitman arm shaft 6 to greatest extent, thus reduce the whole height of mechanism.Intake rocker 3, exhaust rocker arm 1 stationary axle at pitman arm shaft 6 two ends adopt decentraction structure, suitable distance is pulled open along vertical crankshaft axial direction, guarantee intake rocker 3, exhaust rocker arm 1 both can be arranged on Same Part, unified Rocker Ratio can be met again, decrease installation immovable point, shorten length and the width of mechanism.
Pitman arm shaft 6 is furnished with axial through horizontal oil duct A and is communicated with the vertical oil duct B of bottom surface and horizontal oil duct A.Patch 7 shutoff of horizontal oil duct A two ends, vertical oil duct B and rocker shaft bed 10 upper-end surface oilhole through.Lubricant oil leads to rocker shaft bed 10 by cylinder cap main oil gallery, upwards flow into the vertical oil duct B of pitman arm shaft 6, then both sides A1, A2 and A3, A4 is branched to through the horizontal oil duct A of pitman arm shaft 6, one road flows through A1, A2 oil duct lubrication pitman arm shaft 6 and intake rocker 3, rubbing surface between exhaust rocker arm 1, C, D oil duct again on intake rocker 3, exhaust rocker arm 1 flow to rocking arm bulb 4, rocking arm ball cup 5, the spherical fitting surface between lubrication rocking arm bulb 4, rocking arm ball cup 5 and coordinate plane between rocking arm ball cup 5 with valve brachium pontis; Another route A3, A4 oil duct flow to rocking arm roller 13, rocking arm rolling pin 8, the relative movement position between lubrication rocking arm roller 13 and rocking arm rolling pin 8, and the surface of contact of cam and rocking arm roller 13.Wherein, oil duct A1, A2 that pitman arm shaft 6 branches to rocking arm bulb 4 stagger with corresponding oil duct C, D rocking arm leading to rocking arm bulb 4; two oil duct center deviations are 3 ± 0.2mm apart from L, the leakage loss reducing lubricant oil under the prerequisite of lubricants capacity abundance to greatest extent can be realized.Arranged on top of diesel engine single camshaft drives the design of the oil circuit of Valve Rocker Organization both can ensure the effectively lubricating of each part, reduces friction, improves mechanical efficiency, can ensure again the stable of oil pressure, guarantee complete machine stable operation.
When the engine runs, on camshaft, each cylinder inlet and outlet cam is at rocking arm roller 13 corresponding to corresponding distribution moment jack-up, drive rocking arm roller 13 while rotate around rocking arm rolling pin 8, while move upward, thus drive whole rocking arm with pitman arm shaft 6 for rotating shaft rotates, the rocking arm bulb 4 of valve end and rocking arm ball cup 5 are produced move downward, and then drive inlet and outlet door to move downward, open inlet and outlet passage.
Compact structure of the present invention, installs location reliably.The mounting structure form of pitman arm shaft, improves structural rigidity, makes pitman arm shaft not easily produce vibration in operation process, thus guarantees the accurate of valve timing, shortens mechanism's axial length simultaneously.The installation positioning form of rocker shaft bed and rocking arm, both ensure that linking intensity, met the requirement of inlet and outlet Rocker Ratio, again reduced mechanism height.Lubricating oil path connection and reasonable arrangement, each part lubrication, cooling are evenly reliably.Mechanism assembly corrects through FEA structural analysis, realizes stress optimization, guarantees that there are enough strength and stiffness at each position of part, effectively improve functional reliability, reduce noise and vibration simultaneously.
Claims (3)
1. arranged on top of diesel engine single camshaft drives Valve Rocker Organization, comprising: exhaust rocker arm (1), nut (2), intake rocker (3), rocking arm bulb (4), rocking arm ball cup (5), pitman arm shaft (6), patch (7), rocking arm rolling pin (8), the first locating stud (9), rocker shaft bed (10), the second locating stud (11), rocker shaft bed set screw (12), rocking arm roller (13) and bolt (14); It is characterized in that: rocking arm ball cup (5) is sleeved on rocking arm bulb (4), rocking arm bulb (4) in rocking arm ball cup (5) rotatable freely; The threaded end of rocking arm bulb (4) is screwed in the tapped hole of rocking arm valve end, and nut (2) is arranged on the threaded end top that rocking arm bulb (4) exposes rocking arm end face; Rocking arm roller (13) is arranged in the fluting of rocker cam end, is combined as a whole with rocking arm by the rocking arm rolling pin (8) inserting rocker cam end endoporus; The second locating stud (11) is installed in rocker shaft bed (10) bottom surface, end face mills out intake rocker (3), exhaust rocker arm (1) mounting groove, groove bottom installs rocker shaft bed set screw (12), and axial constraint is carried out to intake rocker (3), exhaust rocker arm (1) in groove side; Pitman arm shaft (6) is made up of the installation base of centre and the intake rocker (3) at two ends, the stationary axle of exhaust rocker arm (1), and the equal substantially horizontal milling of two axial ends is put down; Intake rocker (3) and exhaust rocker arm (1) are set in pitman arm shaft (6) two ends; Three bolts (14) are each passed through two ends and the middle part of pitman arm shaft (6), pitman arm shaft (6) are fixed on the upper end face of rocker shaft bed (10), and locate with the first locating stud (9).
2. arranged on top of diesel engine single camshaft according to claim 1 drives Valve Rocker Organization, it is characterized in that: the intake rocker (3) at pitman arm shaft (6) two ends and exhaust rocker arm (1) stationary axle adopt decentraction structure, the distance pulled open along vertical crankshaft axial direction ensures that intake rocker (3) and exhaust rocker arm (1) have identical Rocker Ratio and can be arranged on Same Part.
3. arranged on top of diesel engine single camshaft according to claim 1 drives Valve Rocker Organization, it is characterized in that: pitman arm shaft (6) is furnished with axial through horizontal oil duct (A) and is communicated with the vertical oil duct (B) of bottom surface and horizontal oil duct (A); Patch (7) shutoff of horizontal oil duct A two ends, vertical oil duct (B) is through with rocker shaft bed (10) upper-end surface oilhole, and shunting oil duct (A1), (A2) of horizontal oil duct (A) are 3 ± 0.2mm with the oil duct (C) on inlet and outlet rocking arm, (D) center deviation distance (L).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510118563.5A CN105569756B (en) | 2015-03-18 | 2015-03-18 | Arranged on top of diesel engine single camshaft drives Valve Rocker Organization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510118563.5A CN105569756B (en) | 2015-03-18 | 2015-03-18 | Arranged on top of diesel engine single camshaft drives Valve Rocker Organization |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105569756A true CN105569756A (en) | 2016-05-11 |
| CN105569756B CN105569756B (en) | 2018-01-12 |
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| CN201510118563.5A Active CN105569756B (en) | 2015-03-18 | 2015-03-18 | Arranged on top of diesel engine single camshaft drives Valve Rocker Organization |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939467A (en) * | 2017-12-28 | 2018-04-20 | 潍柴动力股份有限公司 | Valve intake and exhaust rocker structure and diesel engine |
| CN108457714A (en) * | 2018-03-17 | 2018-08-28 | 潍柴重机股份有限公司 | A kind of rocking arm mounting structure |
| CN113898722A (en) * | 2021-10-20 | 2022-01-07 | 中船动力研究院有限公司 | Rocker arm mechanism |
| CN114320514A (en) * | 2021-12-28 | 2022-04-12 | 江苏四达动力机械集团有限公司 | Rocker arm shaft seat mounting structure for diesel engine |
| CN114753901A (en) * | 2022-04-24 | 2022-07-15 | 第一拖拉机股份有限公司 | Rocker shaft assembly for diesel engine valve actuating mechanism |
| CN115492661A (en) * | 2022-09-28 | 2022-12-20 | 中车资阳机车有限公司 | Diesel engine valve mechanism |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20110265749A1 (en) * | 2010-04-30 | 2011-11-03 | Thomas Flender | Bearing block for a camshaft |
| CN103046977A (en) * | 2012-12-20 | 2013-04-17 | 中国兵器工业集团第七0研究所 | Special-shaped swing arm |
| CN203335154U (en) * | 2013-07-03 | 2013-12-11 | 广西玉柴机器股份有限公司 | Diesel inlet valve rocker arm assembly |
| CN203335157U (en) * | 2013-07-22 | 2013-12-11 | 中国重汽集团济南动力有限公司 | Valve rocker assembly of valve train with overhead cam |
| CN203430586U (en) * | 2013-07-30 | 2014-02-12 | 浙江和日摇臂有限公司 | Motor rocker |
| CN204552859U (en) * | 2015-03-18 | 2015-08-12 | 第一拖拉机股份有限公司 | Arranged on top of diesel engine single camshaft drives Valve Rocker Organization |
-
2015
- 2015-03-18 CN CN201510118563.5A patent/CN105569756B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110265749A1 (en) * | 2010-04-30 | 2011-11-03 | Thomas Flender | Bearing block for a camshaft |
| CN103046977A (en) * | 2012-12-20 | 2013-04-17 | 中国兵器工业集团第七0研究所 | Special-shaped swing arm |
| CN203335154U (en) * | 2013-07-03 | 2013-12-11 | 广西玉柴机器股份有限公司 | Diesel inlet valve rocker arm assembly |
| CN203335157U (en) * | 2013-07-22 | 2013-12-11 | 中国重汽集团济南动力有限公司 | Valve rocker assembly of valve train with overhead cam |
| CN203430586U (en) * | 2013-07-30 | 2014-02-12 | 浙江和日摇臂有限公司 | Motor rocker |
| CN204552859U (en) * | 2015-03-18 | 2015-08-12 | 第一拖拉机股份有限公司 | Arranged on top of diesel engine single camshaft drives Valve Rocker Organization |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939467A (en) * | 2017-12-28 | 2018-04-20 | 潍柴动力股份有限公司 | Valve intake and exhaust rocker structure and diesel engine |
| CN107939467B (en) * | 2017-12-28 | 2023-12-15 | 潍柴动力股份有限公司 | Valve air inlet and outlet rocker arm structure and diesel engine |
| CN108457714A (en) * | 2018-03-17 | 2018-08-28 | 潍柴重机股份有限公司 | A kind of rocking arm mounting structure |
| CN113898722A (en) * | 2021-10-20 | 2022-01-07 | 中船动力研究院有限公司 | Rocker arm mechanism |
| CN114320514A (en) * | 2021-12-28 | 2022-04-12 | 江苏四达动力机械集团有限公司 | Rocker arm shaft seat mounting structure for diesel engine |
| CN114753901A (en) * | 2022-04-24 | 2022-07-15 | 第一拖拉机股份有限公司 | Rocker shaft assembly for diesel engine valve actuating mechanism |
| CN115492661A (en) * | 2022-09-28 | 2022-12-20 | 中车资阳机车有限公司 | Diesel engine valve mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105569756B (en) | 2018-01-12 |
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