CN114961911A - Engine rocker arm capable of automatically controlling roller lubricating oil circuit switch - Google Patents
Engine rocker arm capable of automatically controlling roller lubricating oil circuit switch Download PDFInfo
- Publication number
- CN114961911A CN114961911A CN202210695471.3A CN202210695471A CN114961911A CN 114961911 A CN114961911 A CN 114961911A CN 202210695471 A CN202210695471 A CN 202210695471A CN 114961911 A CN114961911 A CN 114961911A
- Authority
- CN
- China
- Prior art keywords
- roller
- rocker arm
- lubricating oil
- roller shaft
- control plunger
- 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
-
- 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 engine rocker arm for automatically controlling the opening and closing of a roller lubricating oil circuit, which is a roller rocker arm, the width of a roller mounting part of the rocker arm is larger than that of a roller, the roller can slide on a roller shaft, so that the roller has two working positions on the roller shaft, a control plunger is arranged on the roller lubricating oil circuit of a rocker arm body, a gap is arranged in the middle part of the control plunger, when the working positions of the roller are switched, the roller pushes the control plunger to move, the lubricating oil circuit of the working position of the roller is switched on, and the lubricating oil circuit of the working position of the roller is closed at the same time, so that the opening and closing of the lubricating oil circuit are automatically controlled when the working positions of the roller are switched.
Description
Technical Field
The invention relates to the technical field of engines, in particular to an engine rocker arm capable of automatically controlling a roller lubricating oil circuit to be opened and closed.
Background
The rocker arm is one of the main parts in the valve actuating mechanism of the engine, the engine with the top-mounted 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 top-mounted 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 the engine rocker arm for automatically controlling the roller lubricating oil circuit switch.
The invention provides an engine rocker arm for automatically controlling a roller lubricating oil circuit switch, which comprises a rocker arm body, rollers and roller shafts, wherein one end of the rocker arm body is provided with a notch for mounting the rollers, two side walls of the notch are provided with roller shaft mounting holes, the roller shafts are fixedly mounted in the roller shaft mounting holes, the rollers are rotatably mounted on the roller shafts and can slide on the roller shafts, the width of the notch part of the rocker arm body is larger than that of the rollers, so that the rollers are provided with two working positions on the roller shafts, the side walls of the two sides of the notch of the rocker arm body are respectively provided with a rocker arm lubricating oil hole, the insides of the two ends of the roller shafts are respectively provided with roller shaft lubricating oil holes, one end of each roller shaft lubricating oil hole is respectively communicated with the rocker arm lubricating oil holes of the two sides of the rocker arm body, and the other end of each roller shaft is respectively communicated with the two working positions of the rollers, plunger holes are respectively formed in the side walls of the two sides of the notch of the rocker arm body, the plunger holes are communicated with the lubricating oil holes of the rocker arm in a cross mode, a control plunger is installed in each plunger hole in a slidable mode, annular oil grooves are respectively formed in the left side and the right side of the control plunger, retaining rings are respectively installed at the two ends of the control plunger, the middle of the control plunger is provided with the notch, and the outer circle of the roller is located in the notch of the control plunger.
Further, the axial length of the notch of the middle part of the control plunger, the positions of the check rings at the two ends, the width of the roller and the distance between the two working positions of the roller have the following relations: when the roller is located at the working position on any side of the roller shaft, the end face of the roller is in contact with the end face of the notch of the control plunger on the side where the roller is located, the annular oil groove on the side where the roller is located is aligned with the lubricating oil hole of the rocker arm through the retaining ring on the side where the roller is not located, so that the lubricating oil path of the working position where the roller is located is communicated, and meanwhile, the annular oil groove on the side where the roller is not located is staggered with the lubricating oil hole of the rocker arm, so that the lubricating oil path of the working position where the roller is not located is closed.
Preferably, the control plunger middle portion notch is an annular notch.
Preferably, the control plunger middle part gap is a flat cut.
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 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. In the drawings of different embodiments or designs, parts have the same reference numbers, which only represent the same or similar parts, and do not mean the same parts or have the same structure, and the drawings and the description thereof should be regarded as the right. In the drawings:
FIG. 1 is a schematic structural view of a rocker arm of a first embodiment of the present invention;
FIG. 2 is a schematic structural view of a control plunger according to a first embodiment of the present invention;
FIG. 3 is a schematic view of the control piston according to a second embodiment of the present invention;
fig. 4 is a cross-sectional view of a rocker arm of the first embodiment of the present invention along the lubricating oil hole of the rocker arm and the lubricating oil hole of the roller shaft (with the roller in one of the operating positions);
FIG. 5 is a cross-sectional view of a rocker arm of the first embodiment of the present invention taken through the rocker arm oil passage and the roller shaft oil passage (with the rollers in another operating position);
fig. 6 is a sectional view of a rocker arm of the second embodiment of the present invention along a lubricating oil hole of the rocker arm and a lubricating oil hole of a roller shaft;
Detailed Description
Figures 1, 2 and 4 and 5 depict schematic views of the construction of a rocker arm according to a first embodiment of the invention, as shown in figure 1, the engine rocker arm for automatically controlling the roller lubricating oil circuit switch comprises a rocker arm body 1, a control plunger 2, a roller shaft 3, a roller 4, and a retainer ring 5, one end of the rocker arm body 1 is provided with a gap for mounting a roller, two side walls of the gap are provided with roller shaft mounting holes, two ends of the roller shaft 3 are fixedly arranged in the roller shaft mounting holes of the rocker arm body 1, the roller 2 is rotatably arranged on the roller shaft 3, and can slide left and right on the roller shaft 3, the width of the gap part of the rocker arm body 1 is larger than that of the roller 2, so that the roller 2 has two operating positions on the roller shaft 3, respectively on the left side of the roller shaft 3 (fig. 4) and on the right side of the roller shaft 3 (fig. 5). Rocker lubricating oil holes 11 and 12 are respectively formed in the side walls of the left side and the right side of the notch of the rocker body 1, as shown in fig. 4, roller shaft lubricating oil holes 31 and 32 are respectively formed in the left end and the right end of the roller shaft 3, one ends of the two roller shaft lubricating oil holes 31 and 32 are respectively communicated with the rocker lubricating oil holes 11 and 12 on the two sides of the rocker body 1, the other ends of the two roller shaft lubricating oil holes 31 and 32 are respectively led to the two working positions of the roller 2, and the roller shaft lubricating oil holes 31 and 32 respectively form two lubricating oil paths of the roller 2 with the rocker lubricating oil holes 11 and 12 to respectively provide lubrication for the two working positions of the roller. Plunger holes are respectively arranged in the side walls of two sides of the notch of the rocker arm body 1 and are communicated with the lubricating oil holes 11 and 12 of the rocker arm in a crossed manner, a control plunger 2 is slidably arranged in the plunger holes, as shown in fig. 2, annular oil grooves 21 and 22 are respectively arranged on the left side and the right side of the control plunger 2, retainer grooves 24 and 25 are respectively arranged at two ends of the control plunger 2, retainer rings 5 and 6 are respectively arranged in the retainer grooves (as shown in fig. 4), a notch 23 is arranged in the middle of the control plunger 2, in the embodiment, the notch 23 can form an annular notch by processing the outer circle of the control plunger into a small-diameter cylinder, and the outer circle of the roller 2 is positioned in the notch 23 of the control plunger 2 (as shown in fig. 4).
As shown in fig. 4 and 5, in order to realize the function of the rocker arm of the present invention that can automatically control the roller lubrication oil circuit switch, the length of the notch 23 in the middle of the control plunger 2 in the axial direction, the positions of the two end stop rings 5 and 6, the width of the roller 4 and the distance between the two working positions of the roller have the following relations: when the roller 2 is located at any one working position on the roller shaft 3, the end surface of the roller 4 is in end contact with the notch 23 of the control plunger 2 at one side where the roller is located, the annular oil groove of the control plunger 2 at one side where the roller is located is aligned with the lubricating oil hole of the rocker arm through the retaining ring at one side where the roller is not located, so that the lubricating oil path of the working position where the roller is located is communicated, and meanwhile, the annular oil groove at one side where the roller is not located is staggered with the lubricating oil hole of the rocker arm, so that the lubricating oil path of the working position where the roller is not located is closed. Specifically, as shown in fig. 4, when the roller 4 is located at the left side working position, the end surface of the roller 4 contacts with the end surface of the notch of the control plunger 2, and at the same time, because the retainer ring 6 is installed at the right side of the control plunger 2, the control plunger 2 cannot move left and right, so that the control plunger 2 is positioned, at this time, the annular oil groove 21 at the left side of the control plunger 2 is aligned with the rocker arm lubricating oil hole 11, so that the lubricating oil path at the working position of the roller 4 is conducted, at this time, the annular oil groove 22 at the right side of the control plunger 2 is staggered with the rocker arm lubricating oil hole 12, so that the lubricating oil path at the non-working position of the roller 4 is closed, when the roller 4 is switched to the right side working position, as shown in fig. 5, the roller 4 pushes the control plunger 2 to move right, in the same way, through the roller end surface and the retainer ring 5 at the left side of the control plunger 2, and positioning the control plunger 2, conducting the lubricating oil path at the right working position where the roller 4 is positioned at the moment, and closing the lubricating oil path at the left working position where the roller is not positioned, so that the lubricating oil path is automatically controlled to be switched on and off when the working position of the roller is switched.
Fig. 6 shows a second embodiment of the present invention, which is different from the first embodiment in the structure of the control plunger 2, and fig. 3 shows the structure of the control plunger 2 of the present embodiment, which is different from the first embodiment in that the middle part notch 23 of the control plunger 2 is a flat notch formed by milling the middle part of the control plunger 2, and when the operating position of the roller 4 is switched, the end surface of the notch 23 is pushed by the end surface of the roller 4 to move the control plunger 2, which realizes the same operating process of automatically controlling the roller lubricating oil circuit switch as the first embodiment. The advantage of this embodiment is that when the notch 23 is in a flat cut structure, a larger space can be left for the roller, so that the structure is more compact, and the notch is particularly suitable for an engine with very compact requirements on the structure of the rocker arm
It should be noted that the above 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 is obvious to those skilled in the art that the technical solutions described in the above embodiments can be further modified, or the technical features thereof can be replaced and combined without departing from the concept of the present invention, and these should be regarded as the protection scope of the present invention.
Claims (4)
1. The utility model provides an automatic engine rocking arm of lubricated oil circuit switch of control gyro wheel, includes rocker arm body, gyro wheel and roller shaft, the one end of rocker arm 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 install on the roller shaft to can slide on the roller shaft, the partly width of breach of rocker arm body is greater than the width of gyro wheel, makes the gyro wheel is in two operating position, characterized by have on the roller shaft: rocker arm lubricating oil holes are respectively formed in the side walls of two sides of the notch of the rocker arm body, roller shaft lubricating oil holes are respectively formed in the inner parts of two ends of each roller shaft, one end of each roller shaft lubricating oil hole is communicated with the corresponding rocker arm lubricating oil hole in two sides of the rocker arm body, the other end of each roller shaft lubricating oil hole is communicated with two working positions of each roller, plunger holes are respectively formed in the side walls of two sides of the notch of the rocker arm body, control plungers are arranged in the plunger holes in a cross mode, control plungers are installed in the plunger holes in a slidable mode, annular oil grooves are respectively formed in the left side and the right side of each control plunger, retainer rings are respectively installed at two ends of each control plunger, a notch is formed in the middle of each control plunger, and the outer circle of each roller is located in the notch of each control plunger.
2. The rocker arm of engine for automatically controlling the roller lubricating oil circuit switch as claimed in claim 1, wherein: the axial length of the gap in the middle part of the control plunger, the positions of the check rings at two ends, the width of the roller and the distance between the two working positions of the roller have the following relations: when the roller is located at the working position on any side of the roller shaft, the end face of the roller is in contact with the end face of the notch of the control plunger on the side where the roller is located, the annular oil groove on the side where the roller is located is aligned with the lubricating oil hole of the rocker arm through the retaining ring on the side where the roller is not located, so that the lubricating oil path of the working position where the roller is located is communicated, and meanwhile, the annular oil groove on the side where the roller is not located is staggered with the lubricating oil hole of the rocker arm, so that the lubricating oil path of the working position where the roller is not located is closed.
3. The rocker arm of engine for automatically controlling the roller lubricating oil circuit switch as claimed in claim 1, wherein: the middle part gap of the control plunger is an annular gap.
4. The rocker arm of engine for automatically controlling the roller lubricating oil circuit switch as claimed in claim 1, wherein: the middle part gap of the control plunger is a flat cut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210695471.3A CN114961911A (en) | 2022-05-18 | 2022-05-18 | Engine rocker arm capable of automatically controlling roller lubricating oil circuit switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210695471.3A CN114961911A (en) | 2022-05-18 | 2022-05-18 | Engine rocker arm capable of automatically controlling roller lubricating oil circuit switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114961911A true CN114961911A (en) | 2022-08-30 |
Family
ID=82962879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210695471.3A Pending CN114961911A (en) | 2022-05-18 | 2022-05-18 | Engine rocker arm capable of automatically controlling roller lubricating oil circuit switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114961911A (en) |
-
2022
- 2022-05-18 CN CN202210695471.3A patent/CN114961911A/en active Pending
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