CN111237025A

CN111237025A - Engine rocker arm capable of automatically opening and closing roller shaft lubricating oil hole

Info

Publication number: CN111237025A
Application number: CN202010091692.0A
Authority: CN
Inventors: 姬腾飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-23
Filing date: 2020-01-23
Publication date: 2020-06-05
Also published as: CN111622821A; CN111622821B

Abstract

The invention relates to an engine rocker arm capable of automatically opening and closing roller shaft lubricating oil holes, which is a roller rocker arm, the width of a roller mounting part of the rocker arm is larger than the thickness of a roller, the roller can slide on the roller shaft, so that the roller has two working positions, the roller shaft lubricating oil holes are respectively arranged in the two ends of the roller shaft, one end of each roller shaft lubricating oil hole of the roller shaft is respectively communicated with the rocker arm lubricating oil holes on the two sides of a rocker arm body, the other end of each roller shaft lubricating oil hole is respectively communicated with the two working positions of the roller, a control plunger and a spring are arranged on the rocker arm body or the roller shaft, the control plunger controls the roller shaft lubricating oil holes on the positions to be opened at the working positions of the roller, and the control plunger controls the roller shaft lubricating oil holes on the positions to be closed at the other working positions where the roller is not located Excessive oil mist is generated.

Description

Engine rocker arm capable of automatically opening and closing roller shaft lubricating oil hole

Technical Field

The invention relates to the technical field of engines, in particular to an engine rocker arm capable of automatically opening and closing a lubricating oil hole of a roller shaft.

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 application 201910423341.2 discloses a valve driving apparatus, 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 so as to realize variable valves, and for the roller rocker arm, 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.

Disclosure of Invention

In order to solve the defects, the invention provides the engine rocker arm capable of automatically opening and closing the lubricating oil hole of the roller shaft.

The invention provides an engine rocker arm capable of automatically opening and closing roller shaft lubricating oil holes, which comprises a rocker arm body, rollers and roller shafts, wherein one end of the rocker arm body is provided with a notch for installing the rollers, two side walls of the notch are provided with roller shaft installing holes, the roller shafts are fixedly installed in the roller shaft installing holes, the rollers are rotatably installed 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 the thickness of the rollers, so that the rollers are provided with two working positions on the roller shafts, the side walls at two sides of the notch of the rocker arm body are respectively provided with the rocker arm lubricating oil holes, the roller shaft lubricating oil holes are respectively arranged in the two ends of the roller shafts, one ends of the two roller shaft lubricating oil holes of the roller shafts are respectively communicated with the rocker arm lubricating oil holes at two sides of the rocker arm body, the other ends of the two roller shaft lubricating oil holes of the roller shaft are respectively communicated with two working positions of the roller, the two roller shaft lubricating oil holes of the roller shaft are not communicated, a control plunger and a spring are further arranged on the rocker arm body or the roller shaft, the control plunger and the spring control the roller shaft lubricating oil holes of the working positions of the roller on the roller shaft to be opened, and the roller shaft lubricating oil holes of the working positions of the roller not to be closed.

And furthermore, plunger holes are respectively formed in the side walls of two sides of the notch of the rocker body and are communicated with the lubricating oil holes of the rocker, control plungers are arranged in the plunger holes, one end of each control plunger is provided with a flange structure, the flange ends of the control plungers are installed on the outer side of the side wall of the notch of the rocker body, annular grooves are formed in the control plungers, springs are respectively arranged on the two side surfaces of the rocker body, one end of each spring is fixed on the rocker body, and the other end of each spring is pressed against the flange end of the control plunger.

Further, in one working position of the roller shaft where the roller is located, the control plunger on one side of the working position is pressed into the plunger hole on the side by the roller, at the moment, the ring groove on the control plunger on the side is aligned with the rocker arm lubricating oil hole on the side, in another working position of the roller shaft where the roller is not located, the flange end of the control plunger on one side of the working position is pressed on the rocker arm body by the spring on the side, the other end of the control plunger on the side extends to the inner side of the notch side wall of the rocker arm body for a certain distance, at the moment, the ring groove on the control plunger on the side is staggered with the rocker arm lubricating oil hole on the side.

Furthermore, plunger holes are respectively arranged at two working positions of the roller on the roller shaft, the two plunger holes are respectively communicated with two roller shaft lubricating oil holes of the roller shaft, the two plunger holes are not communicated, a control plunger is arranged in each plunger hole, one end of each control plunger is provided with a spring, the other end of each control plunger is a spherical surface, and the diameter of an orifice at one end of a plunger hole lubricating oil outlet is smaller than that of the spherical surface end of the control plunger.

Further, in one of the operating positions of the roller shaft where the roller is located, the spherical end of the control plunger on one side of the operating position is compressed into the plunger hole by the roller, at this time, a gap is generated between the spherical end of the control plunger on the side and the plunger hole, and the plunger hole on the side is communicated with the roller shaft lubricating oil hole on the side, and in the other operating position of the roller shaft where the roller is not located, the control plunger on one side of the operating position is pressed against the plunger hole under the action of the spring, and the spherical end of the control plunger on the side protrudes to the outside of the roller shaft, and the plunger hole on the side is sealed from the roller shaft lubricating oil hole on the side.

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 the valve chamber are avoided, and the device is simple in structure, low in cost and easy to apply.

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:

FIGS. 1 and 2 are side views of the first embodiment of the present invention, viewed from the left and right directions, respectively;

FIG. 3 is a top plan view of the first embodiment of the present invention as viewed from the top and a cross-sectional view taken through the rocker arm oil gallery and the roller axle oil gallery;

FIG. 4 is an enlarged schematic view of a cross-sectional view of the first embodiment of the present invention along the rocker arm lubrication oil hole and the roller axle lubrication oil hole;

FIGS. 5 and 6 are side axial views of a second embodiment of the present invention, viewed from the left and right directions, respectively;

FIG. 7 is a top plan view of a second embodiment of the present invention as viewed from the top and a cross-sectional view through the rocker arm oil gallery and the roller axle oil gallery;

FIG. 8 is an enlarged schematic view of a second embodiment of the present invention taken in cross-section through the rocker arm lubrication port and the roller axle lubrication port;

Detailed Description

Fig. 1 to 4 illustrate a first embodiment of the present invention, in which an engine rocker arm capable of automatically opening and closing a lubricant hole of a roller shaft includes a rocker arm body 1, a roller 2, a roller shaft 3, a control plunger 4, and a spring 5, a notch for mounting the roller is provided at one end of the rocker arm body 1, roller shaft mounting holes are provided on two side walls of the notch, 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 mounted on the roller shaft 3, is rotatable on the roller shaft 3, and is slidable on the roller shaft 3, and a width of the notch of the rocker arm body 1 is greater than a thickness of the roller 2, so that the roller 2 has two working positions on the roller shaft 3, namely a left end of the roller shaft 3 and a right end of the roller shaft 3. Rocker lubricating oil holes 11 are respectively formed in the side walls of two sides of the notch of the rocker body 1, as shown in fig. 3 and 4, roller shaft lubricating oil holes 31 are respectively formed in the two ends of the roller shaft 3, one ends of the two roller shaft lubricating oil holes 31 of the roller shaft 3 are respectively communicated with the rocker lubricating oil holes 11 in two sides of the rocker body 1, the other ends of the two roller shaft lubricating oil holes 31 of the roller shaft 3 are respectively communicated with two working positions of the roller 2, and the two roller shaft lubricating oil holes 31 of the roller shaft 3 are not communicated with each other. Plunger holes 12 are formed in the side walls of two sides of a gap of the rocker arm body 1 respectively, the plunger holes 12 are communicated with a lubricating oil hole 11 of the rocker arm, a control plunger 4 is arranged in the plunger holes 12, one end of the control plunger 4 is provided with a flange structure, the flange end of the control plunger 4 is installed on the outer side of the side wall of the gap of the rocker arm body 1, an annular groove 41 is formed in the control plunger 4, springs 5 are further arranged on the two side surfaces of the rocker arm body 1 respectively, one end of each spring 5 is fixed to the rocker arm body 1, the other end of each spring is pressed to the flange end of the control plunger 4, and in addition, the outermost ends of the lubricating oil holes 31 of the two roller shafts of the roller shafts 3 are further provided with plugs.

As shown in fig. 4, in one of the operating positions of the roller 2 on the roller shaft 3, the control plunger 4 on one side is pressed into the plunger hole 12 on that side by the roller 2, and the ring groove 41 on the control plunger 4 on that side is aligned with the rocker arm lubricating oil hole 11 on that side. In another working position of the roller shaft 3 where the roller 2 is not located, the flange end of the control plunger 4 on one side of the working position is pressed on the rocker body 1 by the spring 5 on the side, the other end of the control plunger 4 on the side extends to the inner side of the notch side wall of the rocker body 1 for a certain distance, and at the moment, the annular groove 41 on the control column 4 on the side is staggered with the rocker lubricating oil hole 11 on the side.

The working principle of the first embodiment of the invention is as follows: as shown in fig. 4, when the roller 2 is located at one of the operating positions on the roller shaft 3, as described above, the roller 2 presses the end of the control plunger 4 on the side of the operating position into the plunger hole 12, and the ring groove 41 on the control plunger 4 on the side is aligned with the rocker arm lubricating oil hole 11 on the side, so that the rocker arm lubricating oil hole 11 on the side is communicated with the roller shaft lubricating oil hole 31 on the side, and lubricating oil is supplied to the roller through the rocker arm lubricating oil hole 11 and the roller shaft lubricating oil hole 31. In another working position of the roller shaft 3 where the roller is not located, as described above, the ring groove 41 on the control plunger 4 on the side is offset from the rocker arm lubricating oil hole 11 on the side, and the rocker arm lubricating oil hole 11 on the side is closed, so that the roller shaft lubricating oil hole 31 in the working position is closed. Similarly, when the gyro wheel 2 slides to another operating position from the operating position of present department, the control plunger 4 of former operating position is in compressed tightly on the rocking arm body under the effect of spring 5, annular 41 on the control plunger 4 with rocking arm lubrication oil hole 11 staggers, rocking arm lubrication oil hole 11 is closed, and lubricating oil is cut off, and the control plunger 4 of the operating position that gyro wheel 2 is currently located is promoted by the gyro wheel, annular 41 on the control plunger 4 with rocking arm lubrication oil hole 11 aligns, makes rocking arm lubrication oil hole 11 with roller shaft lubrication oil hole 31 communicates, for the gyro wheel provides the lubrication, thereby has realized two roller shaft lubrication oil holes 31 on the roller shaft 3 are along with the operating position of gyro wheel 2 changes and opens and close by oneself.

Fig. 5 to 8 illustrate a second embodiment of the present invention, which is different from the first embodiment in the control of the opening and closing of the oil hole, and as shown in fig. 8, in this embodiment, plunger holes 32 are respectively provided at two operating positions of the roller 2 on the roller shaft 3, the two plunger holes 32 are respectively communicated with two roller shaft lubricating oil holes 31 of the roller shaft 3, the two plunger holes 32 are not communicated with each other, a control plunger 4 is provided in the plunger hole 32, one end of the control plunger 4 is provided with a spring 5, the other end is a spherical surface, and the diameter of the orifice at the lubricating oil outlet end of the plunger hole 32 is smaller than the diameter of the spherical surface end of the control plunger 4.

As shown in fig. 8, in one of the operating positions of the roller 2 on the roller shaft 3, the spherical end of the control plunger 4 on one side of the operating position is compressed into the plunger hole 32 by the roller 2, and at this time, a gap is generated between the spherical end of the control plunger 4 on the side and the plunger hole 32, and the plunger hole 32 on the side communicates with the roller shaft lubricating oil hole 31 on the side. In another working position of the roller shaft 3 where the roller 2 is not located, the control plunger 4 on one side of the working position is pressed against the plunger hole 32 under the action of the spring 5, the spherical end of the control plunger 4 on the side protrudes outside the roller shaft 3, and the plunger hole 32 on the side and the roller shaft lubricating oil hole 31 on the side are sealed.

The working principle of the second embodiment of the invention is as follows: as shown in fig. 8, when the roller 2 is located at one of the operating positions on the roller shaft 3, as described above, the spherical end of the control plunger 4 at the operating position is compressed into the plunger hole 32 by the roller 2, a gap is generated between the spherical end of the control plunger 4 at the operating position and the plunger hole 32, the control plunger 4 makes the plunger hole 32 communicate with the roller shaft lubricating oil hole 31 at the operating position, and the lubricating oil flows out through the gap between the control plunger 4 and the plunger hole 32 to provide lubrication for the roller 2. In the other working position of the roller shaft 3 where the roller 2 is not located, as described above, the control plunger 4 at one side of the working position seals the plunger hole 32 at the side and the roller shaft lubricating oil hole 31 at the side under the action of the spring 5, and the lubricating oil cannot leak out. Similarly, when the roller 2 slides from the current working position to another working position, the control plunger 4 in the original working position seals the plunger hole 32 under the action of the spring 5, and the control plunger 4 in the current working position of the roller 2 is pressed down to communicate the plunger hole 32 with the roller shaft lubricating oil hole 31 so as to provide lubricating oil for the roller 2, so that the two roller shaft lubricating oil holes 31 on the roller shaft 3 are opened and closed automatically along with the change of the working position of the roller 2.

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

1. An engine rocker arm capable of automatically opening and closing a lubricating oil hole of a roller shaft comprises a rocker arm body, a roller and a roller shaft, and is characterized in that: one end of the rocker arm body is provided with a notch for installing a roller, roller shaft mounting holes are formed in two side walls of the notch, the roller shaft is fixedly installed in the roller shaft mounting holes, the roller is rotatably installed 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 the thickness of the roller, so that the roller has two working positions 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 two ends of the roller shaft, one ends of the two roller shaft lubricating oil holes of the roller shaft are respectively communicated with the rocker arm lubricating oil holes of two sides of the rocker arm body, the other ends of the two roller shaft lubricating oil holes of the roller shaft are respectively communicated with the two working positions of the roller, and the two roller shaft lubricating oil holes of the roller shaft are not communicated with each other, and the rocker arm body or the roller shaft is also provided with a control plunger and a spring, the control plunger and the spring control the opening of a roller shaft lubricating oil hole at the working position of the roller on the roller shaft, and the closing of the roller shaft lubricating oil hole at the non-working position of the roller.

2. The engine rocker arm capable of automatically opening and closing the lubricating oil hole of the roller shaft as claimed in claim 1, which is characterized in that: plunger holes are respectively formed in the side walls of the two sides of the notch of the rocker body, the plunger holes are communicated with the lubricating oil holes of the rocker, control plungers are arranged in the plunger holes, one ends of the control plungers are provided with flange structures, the flange ends of the control plungers are installed on the outer sides of the side walls of the notch of the rocker body, annular grooves are formed in the control plungers, springs are respectively arranged on the two side faces of the rocker body, one end of each spring is fixed on the rocker body, and the other end of each spring is pressed against the flange end of the control plunger.

3. The engine rocker arm capable of automatically opening and closing the lubricating oil hole of the roller shaft as claimed in claim 2, which is characterized in that: the roller shaft is provided with a roller, the roller is arranged on the roller shaft, the roller is arranged on one working position, the control plunger on one side of the working position is pressed into the plunger hole on the side by the roller, the ring groove on the control plunger on the side is aligned with the rocker lubricating oil hole on the side at the moment, the roller is arranged on the other working position on the roller shaft, the flange end of the control plunger on one side of the working position is pressed on the rocker body by the spring on the side, the other end of the control plunger on the side extends to the inner side of the notch side wall of the rocker body for a certain distance, and the ring groove on the control plunger on the side is staggered with the rocker lubricating oil hole on the side at the moment.

4. The engine rocker arm capable of automatically opening and closing the lubricating oil hole of the roller shaft as claimed in claim 1, which is characterized in that: plunger holes are respectively arranged at two working positions of the roller on the roller shaft, the two plunger holes are respectively communicated with two roller shaft lubricating oil holes of the roller shaft, the two plunger holes are not communicated, a control plunger is arranged in each plunger hole, one end of each control plunger is provided with a spring, the other end of each control plunger is a spherical surface, and the diameter of an orifice at one end of a lubricating oil outlet of each plunger hole is smaller than that of the spherical surface end of each control plunger.

5. The engine rocker arm capable of automatically opening and closing the lubricating oil hole of the roller shaft as claimed in claim 4, which is characterized in that: in one working position of the roller shaft where the roller is located, the spherical end of the control plunger on one side of the working position is compressed into the plunger hole by the roller, at the moment, a gap is generated between the spherical end of the control plunger on the side and the plunger hole, the plunger hole on the side is communicated with the roller shaft lubricating oil hole on the side, in the other working position of the roller shaft where the roller is not located, the control plunger on one side of the working position is pressed onto the plunger hole under the action of the spring, the spherical end of the control plunger on the side protrudes out of the roller shaft, and the plunger hole on the side and the roller shaft lubricating oil hole on the side are sealed.