CN111271147B - Engine valve rocker mounting structure - Google Patents
Engine valve rocker mounting structure Download PDFInfo
- Publication number
- CN111271147B CN111271147B CN202010280507.2A CN202010280507A CN111271147B CN 111271147 B CN111271147 B CN 111271147B CN 202010280507 A CN202010280507 A CN 202010280507A CN 111271147 B CN111271147 B CN 111271147B
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- Prior art keywords
- rocker arm
- oil
- shaft
- hole
- rocker
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Classifications
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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)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The invention discloses an engine valve rocker arm mounting structure which comprises an engine cylinder cover and a rocker arm shaft, wherein the rocker arm shaft is rotatably arranged on the engine cylinder cover, the rocker arm shaft is provided with an annular oil groove used for receiving lubricating oil from the engine cylinder cover, an oil inlet hole communicated with the annular oil groove, an axial oil duct communicated with the oil inlet hole, a first oil outlet hole communicated with the axial oil duct and used for guiding the lubricating oil to a first rocker arm mounting area, and a second oil outlet hole communicated with the axial oil duct and used for guiding the lubricating oil to a second rocker arm mounting area, the annular oil groove is positioned between the first oil outlet hole and the second oil outlet hole, the axial oil duct extends along the axial direction of the rocker arm shaft, and the first rocker arm mounting area and the second rocker arm mounting area are used for respectively mounting a valve rocker arm. According to the engine valve rocker arm mounting structure, the condition of forming an oil film is met between the rocker shaft and the valve rocker arms, the abrasion between the rocker shaft and the valve rocker arms can be effectively reduced, and the oil supply efficiency can be obviously improved.
Description
Technical Field
The invention belongs to the technical field of engine parts, and particularly relates to an engine valve rocker mounting structure.
Background
In the engine with the camshaft bottom structure, a rocker arm shaft is similar to a lever fulcrum and mainly has the function of supporting a rocker arm to open an air valve, the traditional rocker arm shaft is fixed through a bolt or a shaft seat, a rocker arm center hole is in clearance fit with the rocker arm shaft, and the rocker arm rotates back and forth on the rocker arm shaft at a high speed. The lubricating mode between the rocker shaft and the rocker is as follows: the engine oil passes through the hydraulic tappet from the oil duct of the cylinder body and then goes up the center hole of the push rod, then the engine oil is supplied to the ball socket of the rocker arm from the push rod, the oil duct in the rocker arm is connected with the ball socket and the center hole of the rocker arm, and the engine oil can be supplied to the annular oil groove of the center hole of the rocker arm, so that a layer of oil film can be formed when the rocker arm and the rocker arm shaft move. In an engine with a camshaft bottom-mounted structure, because the rocker arm and the rocker arm shaft are arranged at the far end of the engine, the engine oil pressure is not sufficiently supplied, the lubrication at the ball socket of the push rod and the rocker arm can only be met, and the moving parts of the rocker arm and the rocker arm shaft cannot be lubricated, so that the rocker arm shaft and the rocker arm are eccentrically worn and finally fail.
The rocker arm shaft and the valve rocker arm are important parts in an engine valve mechanism, abnormal abrasion between the valve rocker arm and the rocker arm shaft is required to be avoided for ensuring normal working operation of an engine, and therefore the lubrication mode between the valve rocker arm and the rocker arm shaft must be optimized.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an engine valve rocker arm mounting structure, aiming at reducing the abrasion between a valve rocker arm and a rocker arm shaft.
In order to achieve the purpose, the invention adopts the technical scheme that: engine valve rocker arm mounting structure, including engine cylinder lid and rocking arm axle, the rocking arm axle is rotatable setting on the engine cylinder lid, the rocking arm axle has the annular oil groove that is used for receiving the lubricating oil that comes from the engine cylinder lid, the inlet port that communicates with annular oil groove, with the axial oil duct of inlet port intercommunication, with axial oil duct intercommunication and be used for leading lubricating oil to the first oil outlet of first rocking arm installing zone and with axial oil duct intercommunication and be used for leading lubricating oil to the second oil outlet of second rocking arm installing zone, annular oil groove is located between first oil outlet and the second oil outlet, the axial oil duct is for the axial extension along the rocking arm axle, first rocking arm installing zone and second rocking arm installing zone are used for installing a valve rocker respectively.
The rocker shaft is a hollow shaft, the axial oil duct is a central hole of the rocker shaft, and the annular oil groove is located in the middle of the first oil outlet and the second oil outlet.
The annular oil groove is positioned in the middle of the rocker shaft in the length direction, the axis of the first oil outlet hole is parallel to the axis of the second oil outlet hole, the axes of the first oil outlet hole and the second oil outlet hole are perpendicular to the axis of the rocker shaft, and the first oil outlet hole and the second oil outlet hole extend from the outer circular surface of the rocker shaft towards the inside of the rocker shaft along the radial direction.
The axis of the oil inlet hole with first oil outlet with the axis of second oil outlet parallels, and the oil inlet hole is located the intermediate position department of first oil outlet and second oil outlet.
The axial oil passage extends along the whole axial direction of the rocker arm shaft, the two ends of the rocker arm shaft are provided with bowl-shaped plugs, and the two ends of the rocker arm shaft are sealed by the bowl-shaped plugs.
The engine cylinder cover is provided with a mounting hole into which the rocker arm shaft is inserted, the mounting hole is a blind hole, and a check ring used for limiting the rocker arm shaft is arranged at the opening end of the mounting hole.
According to the engine valve rocker arm mounting structure, the condition of forming an oil film is met between the rocker shaft and the valve rocker arms, the abrasion between the rocker shaft and the valve rocker arms can be effectively reduced, and the oil supply efficiency can be obviously improved.
Drawings
The present specification includes the following figures, which show the contents:
FIG. 1 is a schematic structural view of an engine valve rocker mounting structure of the present invention;
FIG. 2 is a schematic view of a rocker shaft;
labeled in the figure as: 1. a rocker shaft; 2. a first oil outlet hole; 3. a bowl-shaped plug; 4. a second oil outlet hole; 5. an oil inlet hole; 6. an annular oil groove; 7. a retainer ring; 8. mounting holes; 9. mounting grooves; 10. a valve rocker arm; 11. an engine cylinder head.
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 and 2, the present invention provides an engine valve rocker arm 10 mounting structure, including an engine cylinder cover 11 and a rocker arm shaft 1, wherein the rocker arm shaft 1 is rotatably disposed on the engine cylinder cover 11, the rocker arm shaft 1 has an annular oil groove 6 for receiving lubricating oil from the engine cylinder cover 11, an oil inlet hole 5 communicated with the annular oil groove 6, an axial oil passage communicated with the oil inlet hole 5, a first oil outlet hole 2 communicated with the axial oil passage and used for guiding the lubricating oil to a first rocker arm mounting area, and a second oil outlet hole 4 communicated with the axial oil passage and used for guiding the lubricating oil to a second rocker arm mounting area, the annular oil groove 6 is located between the first oil outlet hole 2 and the second oil outlet hole 4, the axial oil passage extends along the axial direction of the rocker arm shaft 1, and the first rocker arm mounting area and the second rocker arm mounting area are used for respectively mounting one valve rocker arm 10.
Specifically, as shown in fig. 1 and 2, the rocker arm shaft 1 is a hollow shaft, the rocker arm shaft 1 has a structure with two open ends and a hollow interior, the axis of the rocker arm shaft 1 is parallel to the length direction of the engine cylinder body, the axial oil passage is a central hole of the rocker arm shaft 1, the axial oil passage extends along the entire axial direction of the rocker arm shaft 1, and the annular oil groove 6 is located in the middle of the first oil outlet hole 2 and the second oil outlet hole 4. The rocker arm shaft 1 can be provided with two valve rocker arms 10, the annular oil groove 6 is a groove extending along the whole circumferential direction on the outer circumferential surface of the rocker arm shaft 1, the annular oil groove 6 is positioned at the middle position of the rocker arm shaft 1 in the length direction, the axes of the first oil outlet hole 2 and the second oil outlet hole 4 are parallel, the axes of the first oil outlet hole 2 and the second oil outlet hole 4 are perpendicular to the axis of the rocker arm shaft 1, and the first oil outlet hole 2 and the second oil outlet hole 4 extend from the outer circumferential surface of the rocker arm shaft 1 to the inside of the rocker arm shaft 1 along the radial direction. The first oil outlet hole 2 and the second oil outlet hole 4 both extend from the outer circular surface of the rocker shaft 1 toward the inside of the rocker shaft 1 in the radial direction, the first oil outlet hole 2 and the second oil outlet hole 4 are circular holes, and the axes of the first oil outlet hole 2 and the second oil outlet hole 4 are parallel. The oil inlet hole 5 extends along the radial direction of the rocker arm shaft 1, the axis of the oil inlet hole 5 is parallel to the axes of the first oil outlet hole 2 and the second oil outlet hole 4, the oil inlet hole 5 is located in the middle of the first oil outlet hole 2 and the second oil outlet hole 4, the oil inlet hole 5 is communicated with the annular oil groove 6 and the axial oil passage, and the oil inlet hole 5 is used for guiding lubricating oil in the annular oil groove 6 to the axial oil passage.
As shown in fig. 1 and 2, the axial oil passage extends along the entire axial direction of the rocker shaft 1, bowl-shaped plugs 3 are arranged at two ends of the rocker shaft 1, and openings at two ends of the rocker shaft 1 are sealed by the bowl-shaped plugs 3. The bowl-shaped plug 3 is in interference fit with the inner hole of the rocker shaft 1, is assembled by cold extrusion, and has a firm structure.
Preferably, as shown in fig. 1 and 2, the first rocker arm mounting area and the second rocker arm mounting area are sequentially arranged along the axial direction of the rocker arm shaft 1, one valve rocker arm 10 is mounted at the first rocker arm mounting area, the other valve rocker arm 10 is mounted at the second rocker arm mounting area, the first oil outlet hole 2 is arranged at the first rocker arm mounting area, the second oil outlet hole 4 is arranged at the second rocker arm mounting area, and the first rocker arm mounting area and the second rocker arm mounting area are subjected to high-frequency quenching treatment, so that an abrasion-resistant hardened layer is formed on the surface of the rocker arm shaft 1.
The rocker arm shaft 1 is used for storing oil supplied from the engine head 11, and the material of the rocker arm shaft 1 is preferably GCr15, and the material performance is excellent. The valve rocker arm 10 is provided with a central hole through which the rocker arm shaft 1 penetrates, and the rocker arm shaft 1 is in clearance fit with the central hole of the valve rocker arm 10, so that the condition of forming an oil film is met, and the abrasion between the rocker arm shaft and the central hole can be reduced.
As shown in fig. 1 and 2, the engine cylinder head 11 has a mounting hole 8 into which the rocker arm shaft 1 is inserted, the mounting hole 8 is a blind hole, and a retainer 7 for limiting the rocker arm shaft 1 is provided at an open end of the mounting hole 8. The engine cylinder head 11 supports the rocker arm shaft 1 at both ends of the rocker arm shaft 1 in the length direction and at the middle position of the rocker arm shaft 1 in the length direction, and ensures a firm structure. The engine cylinder cover 11 is provided with an opening at one end of the mounting hole 8 and a closed end at the other end, the opening of the mounting hole 8 is provided with a mounting groove 9 for embedding the check ring 7, and the mounting groove 9 is an annular groove arranged on the inner circular surface of the mounting hole 8.
During assembly, the valve rocker arms 10 are firstly installed on an engine cylinder cover 11, then the rocker shaft 1 is assembled into the installation holes 8 in the engine cylinder cover 11, the rocker shaft 1 penetrates through center holes of the two valve rocker arms 10, then the hole circlips 7 are installed on the installation grooves 9 in the engine cylinder cover 11, as the installation holes 8 are blind holes, the rocker shaft 1 can be limited by only one circlip 7, and a certain proper gap is reserved between the rocker shaft 1 and the circlips 7, so that the smooth rotation of the rocker shaft 1 is ensured.
When the engine works, engine oil is supplied to the annular oil groove 6 in the middle of the rocker arm shaft 1 from the oil passage hole on the engine cylinder cover 11 and then reaches the central hole at the oil passage hole of the rocker arm shaft 1, the two ends of the rocker arm shaft 1 need to be pressed and sealed by the bowl-shaped plugs 3 to form a cavity for storing the engine oil, and the engine oil can flow out from the oil outlet holes at the matching parts of the left side and the right side of the rocker arm shaft 1 and the valve rocker arm 10 under the action of pressure to lubricate the valve rocker arm 10 and the rocker arm shaft 1. The rocker shaft 1 is directly arranged on the cylinder cover, a rocker shaft 1 seat is not needed, five of six degrees of freedom are all limited, the rocker shaft 1 can only circumferentially rotate in the mounting hole 8 of the engine cylinder cover 11, and an oil film with certain pressure is formed between the rocker shaft 1 and the engine cylinder cover 11 due to high-speed rotation, so that the rocker shaft 1 can be supported to rotate, the oil film is uniformly distributed, and the abrasion is more uniform.
The invention is described above by way of example with reference to the accompanying drawings. It is clear that the specific implementation of the invention is not restricted in the above manner. 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 (2)
1. Engine valve rocker mounting structure, including engine cylinder lid and rocking arm axle, its characterized in that: the rocker arm shaft is used for storing lubricating oil supplied from an engine cylinder head, and the material of the rocker arm shaft is GCr 15;
the rocker arm shaft is rotatably arranged on the engine cylinder cover and is provided with an annular oil groove used for receiving lubricating oil from an engine cylinder cover, an oil inlet hole communicated with the annular oil groove, an axial oil duct communicated with the oil inlet hole, a first oil outlet hole communicated with the axial oil duct and used for guiding the lubricating oil to the first rocker arm mounting area, and a second oil outlet hole communicated with the axial oil duct and used for guiding the lubricating oil to the second rocker arm mounting area, the annular oil groove is positioned between the first oil outlet hole and the second oil outlet hole, the axial oil duct extends along the axial direction of the rocker arm shaft, and the first rocker arm mounting area and the second rocker arm mounting area are used for respectively mounting a valve rocker arm;
The annular oil groove is a groove extending along the whole circumferential direction on the outer circular surface of the rocker shaft, the annular oil groove is positioned in the middle position of the rocker shaft in the length direction, the axis of the first oil outlet hole is parallel to the axis of the second oil outlet hole, the axes of the first oil outlet hole and the second oil outlet hole are perpendicular to the axis of the rocker shaft, the first oil outlet hole and the second oil outlet hole extend from the outer circular surface of the rocker shaft towards the inside of the rocker shaft along the radial direction, the axis of the oil inlet hole is parallel to the axes of the first oil outlet hole and the second oil outlet hole, the oil inlet hole is positioned in the middle position of the first oil outlet hole and the second oil outlet hole, and the oil inlet hole is used for guiding lubricating oil in the annular oil groove to the axial oil duct;
the rocker arm shaft is a hollow shaft, the axial oil passage is a central hole of the rocker arm shaft, and the annular oil groove is positioned in the middle of the first oil outlet and the second oil outlet;
the engine cylinder cover is provided with a mounting hole into which the rocker arm shaft is inserted, the mounting hole is a blind hole, and the opening end of the mounting hole is provided with an elastic retainer ring for limiting the rocker arm shaft; an installation groove for embedding the elastic check ring is arranged at the opening of the installation hole on the engine cylinder cover, and the installation groove is a ring groove arranged on the inner circular surface of the installation hole;
During assembly, the valve rocker arms are firstly installed on an engine cylinder cover, then the rocker arm shafts are assembled into installation holes in an engine cylinder cover, the rocker arm shafts penetrate through central holes of the two valve rocker arms, then the installation holes are installed on the installation grooves in the engine cylinder cover through elastic check rings, and the engine cylinder cover supports the rocker arm shafts at two ends of the rocker arm shafts in the length direction and at the middle position of the rocker arm shafts in the length direction;
when the engine works, lubricating oil is supplied to the annular oil groove in the middle of the rocker arm shaft from the oil passage hole on the engine cylinder cover, then the lubricating oil reaches the central hole from the oil inlet hole of the rocker arm shaft, the two ends of the rocker arm shaft are pressed and sealed by bowl-shaped plugs to form a cavity for storing the lubricating oil, and the lubricating oil flows out from the oil outlet holes at the matching positions of the left side and the right side of the rocker arm shaft and the valve rocker arm under the action of pressure to lubricate the valve rocker arm and the rocker arm shaft.
2. The engine valve rocker arm mounting structure of claim 1, wherein: the bowl-shaped plug is in interference fit with the inner hole of the rocker shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010280507.2A CN111271147B (en) | 2020-04-10 | 2020-04-10 | Engine valve rocker mounting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010280507.2A CN111271147B (en) | 2020-04-10 | 2020-04-10 | Engine valve rocker mounting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111271147A CN111271147A (en) | 2020-06-12 |
| CN111271147B true CN111271147B (en) | 2022-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010280507.2A Active CN111271147B (en) | 2020-04-10 | 2020-04-10 | Engine valve rocker mounting structure |
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| CN (1) | CN111271147B (en) |
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| CN111271147A (en) | 2020-06-12 |
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