CN114961912A - Automatic lubricating roller rocker arm - Google Patents
Automatic lubricating roller rocker arm Download PDFInfo
- Publication number
- CN114961912A CN114961912A CN202210695472.8A CN202210695472A CN114961912A CN 114961912 A CN114961912 A CN 114961912A CN 202210695472 A CN202210695472 A CN 202210695472A CN 114961912 A CN114961912 A CN 114961912A
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- CN
- China
- Prior art keywords
- roller
- hole
- plunger
- lubricating oil
- rocker arm
- 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.)
- Pending
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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
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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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- 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
- F01L2810/00—Arrangements solving specific problems in relation with valve gears
- F01L2810/02—Lubrication
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention relates to an automatic lubricating roller rocker arm, wherein the width of a roller mounting part of the rocker arm is larger than that of a roller, so that the roller is provided with two working positions on a roller shaft, a rocker arm oil inlet hole and a plunger hole are formed in the rocker arm, two roller lubricating oil holes are formed in one end of the roller shaft, one ends of the two roller lubricating oil holes are communicated with the plunger hole, the other ends of the two roller lubricating oil holes are respectively communicated with the two working positions of the roller, a control plunger is slidably mounted in the plunger hole, the control plunger can automatically provide lubrication for the roller along with the change of the working positions of the roller and cut off the lubrication of the non-located position of the roller, and the problems of excessive consumption of lubricating oil flow and excessive oil mist generation in a valve chamber are avoided while good lubrication is provided for the roller.
Description
Technical Field
The invention relates to the technical field of engines, in particular to an automatic lubricating roller rocker arm.
Background
The rocker arm is one of the main parts in the valve actuating mechanism of the engine, the engine with the overhead camshaft usually adopts the roller rocker arm directly driven by the camshaft, the roller rocker arm can reduce the friction resistance between the cam and the rocker arm, can bear higher contact stress, and is widely applied to the engine with the overhead camshaft. When the roller rocker arm works, a roller on the rocker arm rotates on a roller shaft, lubrication is needed between the roller and the roller shaft, and the currently adopted lubrication modes are generally two types: one is to set up the oil hole on the rocker arm to the oil injection lubrication of gyro wheel, this mode is simple in construction, but cause the lubricating oil flow to consume too much and cause the too much oil mist in the air valve chamber because of oil spray splash, increase the work burden of the oil-gas separation device in the ventilation system of crankcase, in addition this mode lubricating oil is difficult to enter the interval between gyro wheel and roller shaft, lubricate the effect badly; in another lubrication mode, a lubricating oil hole is formed in the roller shaft, and lubricating oil is directly supplied to a gap between the roller and the roller shaft, so that excessive lubricating oil flow is not consumed, excessive oil mist generated in the valve chamber due to splashing is not generated, and the lubrication effect is good.
With the development of variable valve technology, roller rocker arms with slidable rollers have appeared, and chinese patent CN11008084A discloses a valve driving device, the roller rocker arm with slidable rollers is adopted, the rollers of the rocker arm can be switched in a sliding way at two working positions and are contacted with different cams, thereby realizing variable valves, even with lubrication in which the roller shaft is provided with lubrication holes, excessive consumption of the lubricant flow and excessive oil mist generation in the valve chamber may occur, because the roller is switched between two operating positions, the need to provide lubrication holes in both operating positions of the roller, when the roller wheel runs at one working position, the lubricating oil hole at the other working position is exposed, and the lubricating oil can be directly sprayed into the valve chamber, so that the lubricating oil flow is excessively consumed and excessive oil mist is generated in the valve chamber.
Chinese patent CN111622821A discloses an engine rocker arm capable of automatically opening and closing a roller shaft lubricating oil hole, and proposes a feasible solution, in which a spring and a plunger are arranged in a rocker arm oil passage to control the connection and the closing of oil holes at two working positions of a roller, so as to realize the automatic opening and closing of the roller lubricating oil passage along with the change of the working positions of the roller.
Disclosure of Invention
In order to solve the defects, the invention provides an automatic lubricating roller rocker arm.
The invention provides an automatic lubricating roller rocker arm, which comprises a rocker arm body, a roller and a roller shaft, wherein one end of the rocker arm body is provided with a notch for mounting the roller, two side walls of the notch are provided with roller shaft mounting holes, the roller shaft is fixedly mounted in the roller shaft mounting hole, the roller is rotatably mounted on the roller shaft and can slide on the roller shaft, the width of the notch part of the rocker arm body is larger than that of the roller, so that the roller has two working positions on the roller shaft, a rocker arm oil inlet hole and a plunger hole are arranged in the rocker arm body, the diameter of the plunger hole at one end close to the roller mounting notch is reduced to form a stepped hole, the rocker arm oil inlet hole is communicated with the large-diameter end of the plunger hole, two roller lubricating oil holes are arranged in one end of the roller shaft, and one ends of the two roller lubricating oil holes are communicated with the plunger hole in the rocker arm body, the other end of the control plunger is respectively communicated with two working positions of the roller on the roller shaft, a control plunger is slidably mounted in the plunger hole and is of a stepped shaft structure, a central oil hole is formed in one end, with the large diameter, of the control plunger, an annular oil groove is formed in the control plunger, a radial oil hole is formed in the annular oil groove of the control plunger and is communicated with the central oil hole, the diameter of the small diameter end of the control plunger is smaller than the smaller inner diameter of the plunger hole, and a sealing plug is mounted at one end, with the large diameter, of the plunger hole.
Further, when the control plunger is installed in the rocker arm plunger hole, the following relations exist between the position of the annular oil groove of the control plunger and the positions of the two roller lubricating oil holes and the working positions of the rollers: when the roller is positioned on the roller shaft and is close to the working position of the control plunger, the small-diameter end of the control plunger extends out of the plunger hole and is contacted with the end surface of the roller under the action of lubricating oil pressure, at the moment, the annular oil groove on the control plunger is positioned at the position aligned with the roller lubricating oil hole leading to the current working position of the roller, the roller lubricating oil hole at the current working position of the roller is communicated for lubricating, meanwhile, the lubricating oil hole of the other roller is disconnected for lubricating, when the roller is positioned on the roller shaft and is far away from the working position of the control plunger, the end surface of the roller is separated from the small-diameter end of the control plunger, the control plunger moves under the action of the lubricating oil pressure and is contacted with the step of the plunger hole, at the moment, the annular oil groove on the control plunger is positioned at the position aligned with the roller lubricating oil hole leading to the current working position of the roller, and the roller lubricating oil hole at the current working position of the roller is communicated for lubrication, and the lubricating oil hole of the other roller is disconnected for lubrication.
Further, the end face of the small-diameter end of the control plunger is a spherical surface.
The invention has the beneficial effects that: the rocker arm can provide lubricating oil for two working positions of the roller, and when the roller is switched to another working position, the lubricating oil hole of the original working position can be automatically closed, so that excessive consumption of the lubricating oil flow and excessive oil mist generated in a valve chamber are avoided, and the rocker arm does not need to be provided with a spring, has a simple and compact structure and low cost, and is particularly suitable for an engine with very compact requirements on the structure of the rocker arm.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention, and not to limit the invention:
FIG. 1 is a schematic top view of a self-lubricating roller rocker arm according to the present invention;
FIG. 2 is a schematic view of the structure of the rocker body of the self-lubricating roller rocker arm of the present invention;
FIG. 3 is a schematic diagram of the control plunger of the self-lubricating roller rocker arm of the present invention;
FIG. 4 is a cross-sectional view of the self-lubricating roller rocker arm of the present invention taken along the rocker arm oil inlet and the roller oil gallery (with the roller in the operating position adjacent the control plunger);
FIG. 5 is a cross-sectional view of the self-lubricating roller rocker arm of the present invention taken along the rocker arm oil inlet and the roller oil gallery (with the roller in the operating position remote from the control plunger);
Detailed Description
Referring to fig. 1, the structure and the operation principle of the self-lubricating roller rocker arm of the present invention are described in detail below with reference to the accompanying drawings of the specification, where the self-lubricating roller rocker arm of the present invention includes a rocker arm body 1, a control plunger 2, a roller shaft 3, a roller 4, and a seal plug 5, one end of the rocker arm body 1 is provided with a notch for mounting the roller, two side walls of the notch are provided with roller shaft mounting holes, two ends of the roller shaft 3 are fixedly mounted in the roller shaft mounting holes of the rocker arm body 1, the roller 2 is rotatably mounted on the roller shaft 3 and can slide left and right on the roller shaft 3, the width of the notch of the rocker arm body 1 is greater than the width of the roller 2, so that the roller 2 has two operating positions on the roller shaft 3 close to the control plunger 2 (see fig. 4) and far from the control plunger 2 (see fig. 5), respectively And (4) placing. As shown in fig. 2, a rocker oil inlet hole 11 and a plunger hole 12 are arranged in the rocker body 1, the diameter of the plunger hole 12 at one end close to the roller mounting gap is reduced to form a stepped hole, and the rocker oil inlet hole 11 is communicated with the large-diameter end of the plunger hole 12. As shown in fig. 4, two roller lubricating oil holes 31 and 32 are formed in one end of the roller shaft 3, one end of each of the two roller lubricating oil holes 31 and 32 is communicated with the plunger hole 12 in the rocker body 1 through two oil holes aligned with the roller shaft on the rocker body, and the other end of each of the two roller lubricating oil holes is respectively communicated with two working positions of the roller 4 on the roller shaft. A control plunger 2 is slidably mounted in the plunger hole 12, as shown in fig. 3, the control plunger 2 has a stepped shaft structure, a central oil hole b 21 is formed at one end of the control plunger 2 with a large diameter, an annular oil groove 22 is formed in the control plunger 2, a radial oil hole 23 is formed in the annular oil groove 22 of the control plunger 2, the radial oil hole 23 is communicated with the central oil hole 21, and the diameter of the end with a small diameter of the control plunger 2 is smaller than the smaller inner diameter of the stepped hole of the plunger hole 12, so that the end with the small diameter of the control plunger 2 extends out of the plunger hole 12, and a seal plug 5 is further mounted at one end with the large diameter of the plunger hole 2.
As shown in fig. 4 and 5, in order to realize the function of automatically lubricating the roller according to the present invention, when the control plunger 2 is installed in the plunger hole 12 of the rocker arm, the position of the annular oil groove 22 of the control plunger 2 has the following relationship with the positions of the two roller lubricating oil holes 31 and 32 and the operating position of the roller 4: when the roller 4 is at the working position (as shown in fig. 4) on the roller shaft close to the control plunger 2, the small diameter end of the control plunger 2 extends out of the plunger hole 12 and contacts with the end surface of the roller 4 under the action of lubricating oil pressure, at the same time, the annular oil groove 22 on the control plunger 2 is at the position aligned with the roller lubricating oil hole 31 leading to the current working position of the roller 4, lubricating oil enters the plunger hole 12 through the rocker arm oil inlet hole 11 and then enters the roller lubricating oil hole 31 through the central oil hole 21, the radial oil hole 23 and the annular oil groove 22 of the control plunger, so that the roller lubricating oil hole 31 at the current working position of the roller 2 is communicated for lubrication, and the other roller lubricating oil hole 32 is disconnected for lubrication, when the roller 4 is at the working position (as shown in fig. 5) on the roller shaft far from the control plunger, the end surface of the roller 4 is out of contact with the small diameter end of the control plunger 2, the control plunger 2 moves under the action of lubricating oil pressure and is in contact with the step of the plunger hole 12, at the moment, the annular oil groove 22 on the control plunger 2 is in a position aligned with the roller lubricating oil hole 32 leading to the current working position of the roller 4, lubricating oil enters the roller lubricating oil hole 32 in the same path, the roller lubricating oil hole 32 in the current working position of the roller 4 is communicated for lubrication, and the lubricating oil hole 31 in the other roller is disconnected for lubrication, so that the function of automatically providing lubricating oil for the roller along with the change of the working position of the roller 4 is realized, meanwhile, the lubricating oil in the non-working position of the roller is cut off, and excessive lubricating oil is prevented from being sprayed into a valve chamber.
Normally, the rocker arm oil inlet hole 11 communicates with an oil hole of a rocker arm shaft, and a lubricant oil of a certain pressure is always supplied to the plunger hole 12 through the rocker arm oil inlet hole 11 when the engine is running, which is not shown in the drawing.
Further, when the roller 4 is located at a working position on the roller shaft close to the control plunger 2, the small diameter end of the control plunger 2 is always in contact with the end surface of the roller 4 to generate friction when the engine runs, and the end surface of the small diameter end of the control plunger 2 can be designed into a spherical surface to reduce friction force and abrasion.
Compared with the prior art, the automatic lubricating roller rocker arm does not need to be provided with a spring, has very simple and compact structure and low cost, and is particularly suitable for an engine with very compact requirement on the rocker arm structure.
It should be noted that the above-mentioned embodiments are only preferred embodiments adopted to illustrate the design and principle of the present invention, and should not be understood as limitations of the present invention, and it should be apparent to those skilled in the art that the technical solutions described in the above-mentioned embodiments can be further modified, or the technical features thereof can be replaced, combined, and the like without departing from the concept of the present invention, and these should be regarded as the protection scope of the present invention.
Claims (3)
1. The utility model provides an automatic lubricated gyro wheel rocking arm, includes the rocker body, gyro wheel and roller shaft, the one end of rocker body is equipped with the breach that is used for installing the gyro wheel, be equipped with the roller shaft mounting hole on the both sides wall of breach, the roller shaft is installed fixedly in the roller shaft mounting hole, the gyro wheel rotationally installs on the roller shaft to can slide on the roller shaft, the breach partial width of rocker body is greater than the width of gyro wheel makes the gyro wheel is in two operating positions, characterized by have on the roller shaft: a rocker arm oil inlet hole and a plunger hole are arranged in the rocker arm body, the diameter of one end of the plunger hole close to a roller mounting notch is reduced to form a stepped hole, the rocker arm oil inlet hole is communicated with the large-diameter end of the plunger hole, two roller lubricating oil holes are arranged in one end of the roller shaft, one ends of the two roller lubricating oil holes are communicated with the plunger hole in the rocker arm body, the other ends of the two roller lubricating oil holes are respectively communicated with two working positions of the roller on the roller shaft, a control plunger is slidably arranged in the plunger hole and is of a stepped shaft structure, a central oil hole is arranged at the large-diameter end of the control plunger, an annular oil groove is arranged on the control plunger, a radial oil hole is arranged in the annular oil groove of the control plunger and is communicated with the central oil hole, and the small-diameter end of the control plunger is smaller than the smaller inner diameter of the plunger hole, and one end of the plunger piston with the large diameter is provided with a sealing plug.
2. The self-lubricating roller rocker arm of claim 1, wherein: when the control plunger is arranged in the rocker plunger hole, the following relations exist between the position of the annular oil groove of the control plunger, the positions of the lubricating oil holes of the two idler wheels and the working positions of the idler wheels: when the roller is positioned on the roller shaft and is close to the working position of the control plunger, the small-diameter end of the control plunger extends out of the plunger hole and is contacted with the end surface of the roller under the action of lubricating oil pressure, at the moment, the annular oil groove on the control plunger is positioned at the position aligned with the roller lubricating oil hole leading to the current working position of the roller, the roller lubricating oil hole at the current working position of the roller is communicated for lubricating, meanwhile, the lubricating oil hole of the other roller is disconnected for lubricating, when the roller is positioned on the roller shaft and is far away from the working position of the control plunger, the end surface of the roller is separated from the small-diameter end of the control plunger, the control plunger moves under the action of the lubricating oil pressure and is contacted with the step of the plunger hole, at the moment, the annular oil groove on the control plunger is positioned at the position aligned with the roller lubricating oil hole leading to the current working position of the roller, and the roller lubricating oil hole at the current working position of the roller is communicated for lubrication, and the lubricating oil hole of the other roller is disconnected for lubrication.
3. The self-lubricating roller rocker arm of claim 1, wherein: the end face of the small-diameter end of the control plunger is a spherical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210695472.8A CN114961912A (en) | 2022-05-18 | 2022-05-18 | Automatic lubricating roller rocker arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210695472.8A CN114961912A (en) | 2022-05-18 | 2022-05-18 | Automatic lubricating roller rocker arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114961912A true CN114961912A (en) | 2022-08-30 |
Family
ID=82964125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210695472.8A Pending CN114961912A (en) | 2022-05-18 | 2022-05-18 | Automatic lubricating roller rocker arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114961912A (en) |
-
2022
- 2022-05-18 CN CN202210695472.8A patent/CN114961912A/en active Pending
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