CN111305923B - Rocker arm shaft seat assembly and diesel engine with same - Google Patents
Rocker arm shaft seat assembly and diesel engine with same Download PDFInfo
- Publication number
- CN111305923B CN111305923B CN202010237622.1A CN202010237622A CN111305923B CN 111305923 B CN111305923 B CN 111305923B CN 202010237622 A CN202010237622 A CN 202010237622A CN 111305923 B CN111305923 B CN 111305923B
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- oil
- rocker arm
- rocker
- shaft
- arm shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Rocker arm axle bed assembly and have its diesel engine. The invention discloses a rocker arm shaft seat assembly which comprises a seat body, a rocker arm shaft arranged on the seat body and a valve rocker arm sleeved on the rocker arm shaft, wherein the seat body is provided with a first oil duct used for receiving lubricating oil from a valve chamber cover, the rocker arm shaft is provided with an annular oil groove used for receiving the lubricating oil from the first oil duct, an oil inlet hole communicated with the annular oil groove, a second oil duct communicated with the oil inlet hole and an oil outlet hole communicated with the second oil duct and used for guiding the lubricating oil to the valve rocker arm. According to the rocker arm shaft seat assembly, the lubricating oil channel of the engine is covered to the rocker arm shaft seat and then to the oil cavity in the rocker arm shaft through the valve chamber, the lubricating oil can be continuously, stably and reliably conveyed between the rocker arm and the rocker arm shaft to form oil film lubrication, so that the lubricating effect is outstanding, and the excessive abrasion between the rocker arm shaft and the rocker arm shaft is avoided. The invention also discloses a diesel engine.
Description
Technical Field
The invention belongs to the technical field of engine parts, and particularly relates to a rocker arm shaft seat assembly and a diesel engine with the same.
Background
Diesel engines generally have higher power per liter and burst pressure, which is a great challenge to internal structural components of the engine, requiring internal parts to bear much higher strength than gasoline engines. The valve train is an important component of the traditional piston engine, the performance of the engine is directly influenced by the design of the valve train, and in a diesel engine, the strength of a moving part in the valve train must be high. In particular, in a multi-cylinder engine, the transmission parts in the valve train are often worn and broken, such as the wear between the rocker shaft and the rocker arm is the most common problem in the engine design, and is difficult to solve. As engine load and power increase, wear becomes more severe, eventually leading to part failure and engine failure. The rocker shaft seat plays a role in fixing the rocker shaft, the rocker shaft seat is always subjected to alternating load, and the problem of cracking also occurs frequently due to the lower strength of the rocker shaft seat.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a rocker arm shaft seat assembly of a diesel engine, aiming at avoiding excessive abrasion between a rocker arm shaft and a rocker arm shaft.
In order to achieve the purpose, the invention adopts the technical scheme that: the rocker arm shaft seat assembly comprises a seat body, a rocker arm shaft arranged on the seat body and a valve rocker arm sleeved on the rocker arm shaft, wherein the seat body is provided with a first oil duct used for receiving lubricating oil from a valve chamber cover, the rocker arm shaft is provided with an annular oil groove used for receiving the lubricating oil from the first oil duct, an oil inlet hole communicated with the annular oil groove, a second oil duct communicated with the oil inlet hole and an oil outlet hole communicated with the second oil duct and used for guiding the lubricating oil to the valve rocker arm.
The rocker shaft is a hollow shaft, the second oil duct is a central hole of the rocker shaft, the number of the oil outlet holes is two, and the annular oil groove is located in the middle of the two oil outlet holes.
The annular oil groove is positioned in the middle of the rocker shaft in the length direction, the axis of the oil outlet is perpendicular to the axis of the rocker shaft, and the oil outlet extends from the outer circular surface of the rocker shaft towards the inside of the rocker shaft along the radial direction.
The rocker shaft is installed on the base body through bolts, the rocker shaft is provided with bolt holes through which the bolts penetrate, the base body is provided with internal thread holes through which the bolts are inserted and rocker shaft installation holes through which the rocker shaft penetrates, and the rocker shaft installation holes are located between the two valve rocker arms.
The annular oil groove is positioned in the rocker shaft mounting hole, the first oil duct is communicated with the rocker shaft mounting hole, the first oil duct is formed by extending from the combining surface of the base body to the rocker shaft mounting hole, and the combining surface of the base body is a plane which is contacted with the valve chamber cover.
And a sealing ring is arranged between the seat body and the valve chamber cover.
The invention provides a diesel engine which comprises a valve chamber cover and a rocker arm shaft seat assembly.
The base body is connected with the valve chamber cover through a bolt, the base body is provided with a shaft seat mounting hole through which the bolt passes, and the valve chamber cover is provided with an internal thread hole into which the bolt is inserted.
According to the rocker arm shaft seat assembly, the lubricating oil channel of the engine is covered to the rocker arm shaft seat and then to the oil cavity in the rocker arm shaft through the valve chamber, the lubricating oil can be continuously, stably and reliably conveyed between the rocker arm and the rocker arm shaft to form oil film lubrication, so that the lubricating effect is outstanding, and the excessive abrasion between the rocker arm shaft and the rocker arm shaft is avoided.
Drawings
The description includes the following figures, the contents shown are respectively:
FIG. 1 is a schematic diagram of a rocker arm axle seat assembly of the present invention;
FIG. 2 is an exploded view of the rocker arm axle seat assembly of the present invention;
FIG. 3 is a partial structural schematic view of a valve chamber cover;
FIG. 4 is a schematic structural view of the base;
FIG. 5 is a schematic view of the assembly of the rocker shaft seat assembly of the present invention with a valve chamber cover;
labeled as: 1. an internally threaded bore; 2. a rocker shaft mounting hole; 3. a shaft seat mounting hole; 4. a base body; 5. a bolt; 6. a valve rocker arm; 7. bolt holes; 8. an annular oil groove; 9. mounting surfaces of bolts; 10. an oil outlet hole; 11. an oil inlet hole; 12. a rocker shaft; 13. a first positioning pin; 14. a second positioning pin; 15. a seal ring; 16. a first oil passage; 17. and (4) bolts.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.
It should be noted that, in the following embodiments, the "first" and "second" do not represent an absolute distinction relationship in structure and/or function, nor represent a sequential execution order, but merely for convenience of description.
As shown in fig. 1 to 5, the present invention provides a rocker arm shaft seat assembly, which includes a seat body 4, a rocker arm shaft 12 disposed on the seat body 4, and a valve rocker arm 6 sleeved on the rocker arm shaft 12, wherein the seat body 4 has a first oil passage 16 for receiving lubricating oil from a valve chamber cover, the rocker arm shaft 12 has an annular oil groove 8 for receiving the lubricating oil from the first oil passage 16, an oil inlet 11 communicated with the annular oil groove 8, a second oil passage communicated with the oil inlet 11, and an oil outlet 10 communicated with the second oil passage and for guiding the lubricating oil to the valve rocker arm 6.
Specifically, as shown in fig. 1 to 5, the base body 4 has a certain length and width, the base body 4 is used for supporting the rocker arm shaft 12, the rocker arm shaft 12 is a hollow shaft, the rocker arm shaft 12 is a structure with two open ends and a hollow interior, the axis of the rocker arm shaft 12 is parallel to the length direction of the base body 4, the second oil passage is a central hole of the rocker arm shaft 12, the second oil passage extends along the axial direction of the rocker arm shaft 12, the oil outlet 10 is provided with two oil outlets, and the annular oil groove 8 is located in the middle of the two oil outlets 10. The rocker arm shaft 12 can be provided with two valve rocker arms 6, the annular oil groove 8 is a groove which extends on the outer circumferential surface of the rocker arm shaft 12 along the whole circumferential direction, the annular oil groove 8 is positioned at the middle position of the length direction of the rocker arm shaft 12, the axis of the oil outlet 10 is vertical to the axis of the rocker arm shaft 12, the oil outlet 10 extends from the outer circumferential surface of the rocker arm shaft 12 to the inner part of the rocker arm shaft 12 along the radial direction, the oil outlet 10 is a circular hole, and the axes of the two oil outlets 10 are parallel. The oil inlet hole 11 extends along the radial direction of the rocker shaft 12, the oil inlet hole 11 is located between the annular oil groove 8 and the second oil channel, and the oil inlet hole 11 is communicated with the annular oil groove 8 and the second oil channel.
As shown in fig. 1 to 5, the rocker shaft 12 is mounted on the base body 4 by a bolt 5, the rocker shaft 12 has a bolt hole 7 through which the bolt 5 passes, the base body 4 has an internally threaded hole 1 through which the bolt 5 is inserted and a rocker shaft mounting hole 2 through which the rocker shaft 12 passes, and the rocker shaft mounting hole 2 is located between the two valve rocker arms 6. Preferably, the rocker arm shaft 12 is fixed to the seat body 4 by two bolts 5, and accordingly, two bolt holes 7 are provided in the rocker arm shaft 12, the two bolt holes 7 are respectively located at both ends of the rocker arm shaft 12 in the length direction, and two internal thread holes 1 into which the bolts 5 are inserted are provided in the seat body 4, and the internal thread holes 1 are located at the middle position in the width direction of the seat body 4. The rocker shaft mounting hole 2 is located at the middle position of the base body 4 in the length direction, the rocker shaft mounting hole 2 is a circular hole, and the axis of the rocker shaft mounting hole 2 is parallel to the length direction of the base body 4. The annular oil groove 8 is positioned in the rocker shaft mounting hole 2, the first oil duct 16 is communicated with the rocker shaft mounting hole 2, and the first oil duct 16 is formed by extending from the combining surface of the seat body 4 to the rocker shaft mounting hole 2. The lubricating oil path of the first oil duct 16 used for guiding lubricating oil from an engine cylinder cover to the base body 4 is arranged in the valve chamber cover, after the valve chamber cover is installed on the engine cylinder cover, the lubricating oil path on the valve chamber cover is communicated with the oil duct on the engine cylinder cover and the first oil duct 16 on the base body 4, the lubricating oil path of the engine can be conveyed to an oil cavity in the base body through the valve chamber cover and then to the rocker arm shaft 12, and engine oil can be continuously, stably and reliably conveyed between the rocker arm and the rocker arm shaft 12 to form oil film lubrication, so that the problem of excessive abrasion between the rocker arm shaft 12 and the valve rocker arm can be solved.
Rocker shaft 12 is similar to the fulcrum of a lever in the engine valve train, and valve rocker arm 6 is installed on rocker shaft 12, and the other end regularly opens and closes the valve under the drive of a camshaft at one end. Rocker shaft 12 is installed on base body 4 through shaft hole clearance fit, and both ends are fixed on base body 4 with the bolt to 6 degrees of freedom complete restrictions reach the purpose of fixed rocker shaft 12. The rocker arm shaft 12 is a hollow shaft, the middle of the rocker arm shaft is provided with an annular oil groove 8 and an oil channel hole, the positions of the two sides of the rocker arm shaft 12, which are provided with rocker arms, are provided with oil outlet holes 10, and the openings at the two ends of the rocker arm shaft 12 are pressed and assembled in an interference fit mode by bowl-shaped plugs to seal the two ends of the second oil channel. When the engine is started, the crankshaft gear drives the engine oil pump gear to rotate, the engine oil pump enables engine oil in an engine lubricating system to circulate, the engine oil reaches the base body from the valve chamber cover, then flows through the rocker arm shaft middle oil inlet hole 11 from the rocker arm shaft seat oil duct, and the annular oil groove 8 arranged at the middle position of the rocker arm shaft 12 can improve oil inlet efficiency. Lubricating oil enters the central cavity of the rocker shaft 12, under the action of the oil pressure, the lubricating oil can only flow out from the oil outlets 10 on the two sides, the oil outlets 10 on the two sides are just matched with the valve rocker 6, the valve rocker 6 and the rocker shaft 12 are in proper clearance fit, oil film lubrication is easily formed at the positions, the abrasion between the rocker shaft 12 and the valve rocker 6 is reduced, the working reliability of a valve mechanism is improved, and the overall service life of an engine is prolonged.
As shown in fig. 1 to 5, the joint surface of the seat body 4 is a plane that is in contact with the valve chamber cover, and the joint surface of the seat body 4 is parallel to the length direction and the width direction of the seat body 4. Set up sealing washer 15 between pedestal 4 and the valve chamber shroud, sealing washer 15 is O type circle, guarantees the leakproofness of the connection between the two parts oil duct, avoids appearing the problem that lubricating oil leaked between pedestal 4 and the valve chamber shroud.
As shown in FIGS. 1 to 5, the invention provides a diesel engine, which comprises a valve chamber cover and the rocker arm shaft seat assembly with the structure. The seat body 4 is connected with the valve chamber cover through a bolt 17, the seat body 4 is provided with a shaft seat mounting hole 3 for the bolt 17 to pass through, and the valve chamber cover is provided with an internal thread hole for the bolt 17 to insert. The valve chamber cover is provided with a first positioning pin 13 and a second positioning pin 14. First locating pin 13 is used for fixing a position pedestal 4, makes the installation more accurate between pedestal 4 and the valve chamber shroud, reduces rocking arm working error, and first locating pin 13 is the annular structure, and during bolt 17 passed the internal thread hole that inserts on the valve chamber shroud behind first locating pin 13, first locating pin 13 was coaxial with bolt 17. The second positioning pin 14 is used for positioning the sealing ring 15, the second positioning pin 14 is of a circular ring structure, the axis of the first positioning pin 13 is parallel to the axis of the second positioning pin 14, the first oil duct 16 is located in the middle position of the seat body 4 in the length direction and the width direction, and the sealing ring 15 is sleeved on the second positioning pin 14, so that the accuracy of the position of the sealing ring 15 is ensured, and the reliability is improved. The second positioning pin 14 is provided at an oil outlet of the valve chamber cover, and the lubricating oil inside the valve chamber cover flows into the first oil passage 16 through the oil outlet and the second positioning pin 14.
In the present embodiment, as shown in fig. 5, the seat body 4 is mounted on the valve chamber cover by six bolts 17, and accordingly, six shaft seat mounting holes 3 are provided on the seat body 4. The material of pedestal 4 is 45 # steel, and valve chamber shroud material is the aluminum alloy, and pedestal 4 is and wholly through thermal refining to improve the intensity of structure, and pedestal 4 is covered through the bolt fastening engine valve chamber, and rocking arm shaft 12 passes through both ends bolt fastening on the pedestal, and every jar of engine corresponds a rocking arm axle bed assembly, and a rocking arm axle bed assembly has two valve rocker arms 6, adopts split type assembly, and on the big diesel engine of detonation pressure, this advantage of its structural stability is more outstanding.
The traditional engine part adopts an integral structure of the shaft seat and the cylinder cover, the shaft seat is directly processed on the cylinder cover, and the valve actuating mechanism is a transmission piece, so that the cylinder cover is easy to crack and only the cylinder cover can be replaced when being maintained on an engine with larger detonation pressure and power because the cylinder cover is stressed too much and bears alternating load.
The diesel engine is an 8-cylinder engine, the shaft seats used by each cylinder are the same, and each shaft seat is provided with the air inlet and exhaust rocker arm, so that the differentiation is reduced, the unified production and processing are facilitated, and the cost is reduced.
The invention is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the invention are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.
Claims (4)
1. Rocking arm axle bed assembly includes the pedestal, sets up rocking arm axle on the pedestal and locates the epaxial valve rocker arm of rocking arm with the cover, its characterized in that: the rocker arm shaft is provided with an annular oil groove for receiving lubricating oil from the first oil passage, an oil inlet hole communicated with the annular oil groove, a second oil passage communicated with the oil inlet hole and an oil outlet hole communicated with the second oil passage and used for guiding the lubricating oil to the valve rocker arm;
the rocker shaft is a hollow shaft, the second oil duct is a central hole of the rocker shaft, the oil outlet holes are two, the annular oil grooves are located in the middle of the two oil outlet holes, the rocker shaft is provided with two valve rocker arms, the valve rocker arms and the rocker shaft are in clearance fit, the annular oil grooves are grooves extending along the whole circumferential direction on the outer circular surface of the rocker shaft, the annular oil grooves are located in the middle of the length direction of the rocker shaft, the axes of the oil outlet holes are perpendicular to the axis of the rocker shaft, the oil outlet holes extend from the outer circular surface of the rocker shaft to the inside of the rocker shaft along the radial direction, the oil outlet holes are round holes, and the axes of the two oil outlet holes are parallel; the oil inlet hole extends along the radial direction of the rocker shaft, is positioned between the annular oil groove and the second oil duct, and is communicated with the annular oil groove and the second oil duct;
the rocker arm shaft is arranged on the base body through two bolts, the rocker arm shaft is provided with two bolt holes for the bolts to pass through, the two bolt holes are respectively positioned at two ends of the rocker arm shaft in the length direction, the base body is provided with two internal thread holes for the bolts to insert, and the internal thread holes are positioned in the middle position of the base body in the width direction;
the base body is provided with an internal thread hole for inserting a bolt and a rocker shaft mounting hole for allowing a rocker shaft to pass through, the rocker shaft mounting hole is positioned between the two valve rockers, the annular oil groove is positioned in the rocker shaft mounting hole, the first oil duct is communicated with the rocker shaft mounting hole, the first oil duct is formed by extending from the combining surface of the base body towards the rocker shaft mounting hole, and the combining surface of the base body is a plane which is contacted with the valve chamber cover;
the valve chamber cover is internally provided with a lubricating oil path for guiding lubricating oil from an engine cylinder cover to the first oil duct of the base body, and after the valve chamber cover is arranged on the engine cylinder cover, the lubricating oil path on the valve chamber cover is communicated with the oil duct on the engine cylinder cover and the first oil duct on the base body.
2. The rocker arm axle seat assembly of claim 1, wherein: and a sealing ring is arranged between the seat body and the valve chamber cover.
3. Diesel engine, including the valve chamber shroud, its characterized in that: the rocker arm axle seat assembly of any one of claims 1-2.
4. The diesel engine of claim 3, wherein: the base body is connected with the valve chamber cover through a bolt, the base body is provided with a shaft seat mounting hole through which the bolt passes, and the valve chamber cover is provided with an internal thread hole into which the bolt is inserted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010237622.1A CN111305923B (en) | 2020-03-30 | 2020-03-30 | Rocker arm shaft seat assembly and diesel engine with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010237622.1A CN111305923B (en) | 2020-03-30 | 2020-03-30 | Rocker arm shaft seat assembly and diesel engine with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111305923A CN111305923A (en) | 2020-06-19 |
| CN111305923B true CN111305923B (en) | 2022-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010237622.1A Active CN111305923B (en) | 2020-03-30 | 2020-03-30 | Rocker arm shaft seat assembly and diesel engine with same |
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| Country | Link |
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| CN (1) | CN111305923B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4537166A (en) * | 1982-09-27 | 1985-08-27 | Honda Giken Kogyo Kabushiki Kaisha | Lubricating arrangement in valve mechanism of an overhead camshaft engine |
| CN201334933Y (en) * | 2009-01-16 | 2009-10-28 | 三阳工业股份有限公司 | Improved engine cylinder head oil passage structure |
| CN102787876A (en) * | 2012-07-26 | 2012-11-21 | 中国兵器工业集团第七0研究所 | Rocker arm support structure for engine |
| CN202788966U (en) * | 2012-07-12 | 2013-03-13 | 四川三鑫南蕾气门座制造有限公司 | Valve rockshaft seat |
| CN204386680U (en) * | 2015-01-08 | 2015-06-10 | 浙江康和机械科技有限公司 | A kind of motor rockshaft and Rocker arm assembly |
| CN105443184A (en) * | 2015-12-30 | 2016-03-30 | 广西玉柴机器股份有限公司 | Engine rocker shaft |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100037844A1 (en) * | 2008-08-13 | 2010-02-18 | Dan Kinsey | Cylinder head and rocker arm assembly for internal combustion engine |
-
2020
- 2020-03-30 CN CN202010237622.1A patent/CN111305923B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4537166A (en) * | 1982-09-27 | 1985-08-27 | Honda Giken Kogyo Kabushiki Kaisha | Lubricating arrangement in valve mechanism of an overhead camshaft engine |
| CN201334933Y (en) * | 2009-01-16 | 2009-10-28 | 三阳工业股份有限公司 | Improved engine cylinder head oil passage structure |
| CN202788966U (en) * | 2012-07-12 | 2013-03-13 | 四川三鑫南蕾气门座制造有限公司 | Valve rockshaft seat |
| CN102787876A (en) * | 2012-07-26 | 2012-11-21 | 中国兵器工业集团第七0研究所 | Rocker arm support structure for engine |
| CN204386680U (en) * | 2015-01-08 | 2015-06-10 | 浙江康和机械科技有限公司 | A kind of motor rockshaft and Rocker arm assembly |
| CN105443184A (en) * | 2015-12-30 | 2016-03-30 | 广西玉柴机器股份有限公司 | Engine rocker shaft |
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| Publication number | Publication date |
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| CN111305923A (en) | 2020-06-19 |
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