TWM520177U - Model engine piston with oil storage lubrication structure - Google Patents

Description

Model engine piston with oil storage lubrication structure

This creation is related to a model engine piston, especially a model engine piston with an oil-storage structure.

A model engine piston is known, as shown in FIG. 1 , which is a schematic diagram of the use of a conventional model engine piston for a model engine. The model engine includes an engine body 1 , which is longitudinally provided with a cylinder. a piston 2 is disposed in the cylinder liner 2 in the axial direction of the cylinder liner 2, and a piston pin hole 4 is further disposed on the outer peripheral wall of the piston 3; a groove 5, the groove 5 is laterally disposed on the outer peripheral wall of the piston 3, and the groove 5 is located above the piston pin hole 4, and the piston pin hole 4 can be sleeved with a piston pin 6. The piston 3 is further provided with a connecting rod 7 , one end of the connecting rod 7 is pivotally disposed in the piston 3 through the piston pin 6 , and the connecting rod 7 extends downwardly from the cylinder liner 2 , and the connecting rod 7 The other end is pivotally provided with a crank shaft 8 which is disposed transversely below the cylinder liner 2 and extends outwardly of the engine body 1 , whereby when the model engine is running, the piston 3 is to be The cylinder liner 2 reciprocates and drives the crankshaft 8 through the connecting rod 7 to operate the model engine The generated power is output by the crankshaft 8.

Please refer to the second and third figures, which are cross-sectional views of the cylinder liner and piston of the conventional model engine, and a partial enlarged cross-sectional view of the cylinder liner and the piston of the conventional model engine. When the engine is in operation, the energy generated by the explosion of the oil film in the cylinder liner 2 can be smoothly converted into the kinetic energy for reciprocating the piston 3, and the piston 3 must be as close as possible to the cylinder liner 2 to avoid The energy of the oil film explosion overflows from the gap between the piston 3 and the cylinder liner 2, but when the piston 3 reciprocates in the cylinder liner 2, if the frictional resistance between the piston 3 and the inner wall of the cylinder liner 2 is too large, This causes the piston 3 to undergo extreme damping when reciprocating, so that the temperature is too high and the power output efficiency of the model engine is degraded.

Therefore, in order to avoid the above situation, the operator often has to honing the inner wall of the cylinder liner 2 to form a plurality of obliquely intersecting grooves 9 on the originally smooth inner wall of the cylinder liner 2, and the groove 9 is on the inner wall of the cylinder liner 2. The depth formed is extremely shallow. For example, the Chinese Patent Publication No. 102189502 and the U.S. Patent No. 5,590,806, both disclose the formation of the groove 9 on the inner wall of the cylinder liner 2, so that the groove formed by the honing process is formed. 9, in addition to maintaining the close cooperation between the piston 3 and the cylinder liner 2, at the same time, because the contact area between the piston 3 and the inner wall of the cylinder liner 2 is reduced, and the groove 9 is formed on the concave and convex surface of the inner wall of the cylinder liner 2, The function of storing the oil film can increase the effect of lubrication, so the frictional resistance can be reduced, the temperature can be lowered, and a certain improvement effect can be achieved.

Further improving the above situation, the operator is provided with the groove 5 laterally on the outer peripheral wall of the piston 3, and the piston 3 can achieve the effect of accumulating oil film through the groove 5 when reciprocating in the cylinder liner 2, and further When the piston 3 is reciprocated by the accumulated oil film, an oil film is formed between the piston 3 and the inner wall of the cylinder liner 2 to achieve the lubricating effect, thereby reducing the damping of the piston 3 to reciprocate.

In order to maintain the close cooperation between the piston 3 and the cylinder liner 2, the depth of the groove 9 formed on the inner wall of the cylinder liner 2 is extremely shallow, so that the effect of lubricating the oil film to produce lubrication is limited, and the groove 5 is Positioned above the piston pin hole 4, so that the oil film stored through the groove 5, The generated lubrication range is limited by the position of the groove 5, so that there is a certain range between the cylinder liner 2 and the piston 3, which cannot be effectively lubricated, and is subjected to great damping during reciprocation, so that the temperature is too high. The cylinder liner 2 and the piston 3 are damaged.

In view of this, after the above-mentioned shortcomings were observed, the creators of this case believed that the existing model engine pistons had the need for further improvement, and there was no such creation.

The main purpose of this creation is to provide a model engine piston with oil storage lubrication structure, which can improve the effective lubrication range between the piston and the cylinder liner and maintain the lubrication effect, thereby reducing the temperature during the operation of the engine and improving the piston and The protection of the cylinder and the smooth movement of the piston for a long time and high rotation speed, thereby improving the efficiency and life of the engine.

In order to achieve the above object, the present invention provides a model engine piston with an oil-storing structure, the piston can be disposed in a cylinder of a model engine, the cylinder is sleeved with a cylinder liner, and the piston is available for the cylinder The sleeve reciprocates along the axial direction of the cylinder liner, and the inner wall of the cylinder sleeve is honed to form a plurality of grooves, and the outer peripheral wall of the piston is further radially provided with at least one groove, and the outer peripheral wall of the piston A piston pin hole is further disposed under the groove, and the piston pin hole is sleeved with a piston pin. The piston is mainly characterized by: at least one oil groove disposed transversely to the outer peripheral wall of the piston, and the oil The lower edge of the groove is lower than the upper edge of the pin hole of the piston, and the depth of the oil groove is between 0.008 mm and 0.01 mm, and the width is between 1 mm and 4 mm.

The model engine piston provided by the present invention has an oil-storing structure, the oil groove is used for storing oil to form an oil film, and the piston can be lubricated, and the piston can be lifted when the piston reciprocates. The effective lubrication range between the cylinder liners maintains the lubrication effect, thereby improving the protection of the piston and the cylinder liner, reducing the loss of the engine running process, and maintaining the activity. The long-term, high-speed rotation of the plug reciprocates smoothly, thereby improving the efficiency and life of the engine.

(known)

1‧‧‧Engine body

2‧‧‧Cylinder liner

3‧‧‧Piston

4‧‧‧Piston pin hole

5‧‧‧ trench

6‧‧‧Piston pin

7‧‧‧ Connecting rod

8‧‧‧ crankshaft

9‧‧‧ grooves

(this creation)

100‧‧‧Model engine piston with oil storage lubrication structure

10‧‧‧ trench

20‧‧‧Piston pin hole

21‧‧‧ piston pin

30‧‧‧ oil trench

200‧‧‧Model Engine

300‧‧ ‧ cylinder

301‧‧‧Cylinder liner

302‧‧‧air inlet

303‧‧‧Exhaust port

304‧‧‧ groove

Figure 1 is a schematic diagram of the use of a conventional model engine piston.

Figure 2 is a cross-sectional view of a cylinder liner and piston of a conventional model engine.

Figure 3 is a partial enlarged cross-sectional view of the cylinder liner and piston of the conventional model engine.

Figure 4 is a cross-sectional view of the cylinder liner and piston of the embodiment of the present invention.

Fig. 5 is a partially enlarged cross-sectional view showing the cylinder liner and the piston of the embodiment of the present invention.

Figure 6 is a schematic diagram of the use of an embodiment of the present invention installed in a model engine.

Figure 7 is a cross-sectional view of a cylinder liner and a piston of another embodiment of the present invention.

Referring to FIGS. 4-6, a model engine piston 100 having an oil-storage structure is provided. The piston 100 can be disposed in a cylinder 300 of a model engine 200. The cylinder 300 is sleeved with a cylinder liner 301. The piston 100 is reciprocally movable in the axial direction of the cylinder liner 301. The lower half of the cylinder liner 301 defines an air inlet 302 and an exhaust port 303, respectively. The air port 303 is disposed on the opposite side of the air inlet 302, and the inner wall of the cylinder liner 301 is honed to form a plurality of grooves 304. The above is the structure of the conventional model engine 200 and the cylinder liner 301. Not to be described, the piston 100 series includes:

The second groove 10 is radially disposed on the outer peripheral wall of the piston 100.

A piston pin hole 20 is disposed on the outer peripheral wall of the piston 100, and the piston pin hole 20 is located below the groove 10, and the piston pin hole 20 is sleeved with a piston pin 21.

a second oil groove 30 disposed transversely to the outer peripheral wall of the piston 100, and the lower edge of the uppermost oil groove 30 of the oil grooves 30 is lower than the upper edge of the piston pin hole 20, and the The depth of the oil groove 30 is between 0.008 mm and 0.01 mm, and the width is between 1 mm and 4 mm. In this embodiment, the position of the uppermost oil groove 30 of the oil groove 30 is Located at the upper edge of the piston pin hole 20.

In order to further understand the characteristics of this creation, the use of technical means and the expected results, we will use the way of this creation to describe, and believe that we can have a deeper and more specific understanding of this creation, as follows: Please 4 and 6 are cross-sectional views of a cylinder liner and a piston of an embodiment of the present invention, and a schematic diagram of the use of the embodiment of the present invention installed in the model engine 200. When the model engine 200 is in operation, The oil film mixed with the fuel and the air is injected into the cylinder liner 301 by the air inlet 302. At this time, the piston 100 is located in the lower half of the cylinder liner 301 and is in an upward motion state to apply the oil film. Compressing toward the upper half of the cylinder liner 301, when the oil film is pressed upward by the piston 100, an oil film is formed on the inner peripheral wall surface of the cylinder liner 301, so that the piston 100 and the cylinder liner 301 are Lubrication is provided between the inner peripheral walls.

Please refer to FIG. 5 again, which is a partial enlarged cross-sectional view of the cylinder liner and the piston of the embodiment of the present invention. The oil film will also diffuse into the grooves 10 and be further stored in the groove 10 of the piston 100. And the oil groove 30 and the groove 304 of the cylinder liner 301, whereby the piston 100 can pass through the grooves 10, the oil grooves 30, and the piston 100 during reciprocation When the grooves 304 are equal, the grooves 10, the oil grooves 30, and the oil film stored in the grooves 304 are attached to the outer peripheral wall surface of the piston 100, and an oil film is formed. An oil film stored in the oil groove 30 to continue with the piston 100 and the cylinder The sleeve 301 provides better lubrication effect, thereby improving the protection of the piston 100 and the cylinder liner 301, reducing the temperature and loss during operation of the model engine 200, and maintaining the smooth running of the piston 100 for a long time and high rotation speed. In order to improve the efficiency and longevity of the model engine 200.

It should be noted that the piston 100 described in this embodiment can be applied to a flat sports car. In order to achieve a better lubrication effect for the high speed and low torque engine, the uppermost oil groove 30 of the oil groove 30 is The position is located at the upper edge of the piston pin hole 20, and the oil groove 30 of the piston 100 has a depth of between 0.008 mm and 0.01 mm, and the width is between 1 mm and 4 mm, which not only reaches the storage oil film. For the purpose of providing a lubricating effect, the effective lubrication range between the piston 100 and the cylinder liner 301 is improved compared to the conventional model engine piston 3, and the piston is not caused during the reciprocating motion of the piston 100. The case where 100 is not in close contact with the cylinder liner 301 results in a loss of compression ratio, which affects the power output of the oil storage lubrication structure of the model engine cylinder liner 301.

In addition, the inner diameter of the cylinder liner 301 is slightly tapered from the lower half of the cylinder liner 301 toward the upper half of the cylinder liner 301 along the axial direction of the cylinder liner 301, thereby reciprocating the piston 100. The tightening of the piston 100 by the cylinder liner 301 can be increased in the upper half of the cylinder liner 301 to improve the groove 10 of the piston 100 and the groove 304 of the oil groove 30 and the cylinder liner 301. The effect of oil storage.

Please refer to FIG. 7 again, which is a cross-sectional view of a cylinder liner and a piston according to another embodiment of the present invention. The piston 100 of the embodiment can be applied to an off-road vehicle, in order to make low speed and high torque. The engine has a better lubricating effect. In this embodiment, the position of the uppermost oil groove 30 of the oil groove 30 is located at the lower edge of the piston pin hole 20, and the oil groove of the piston 100 The depth of the groove 30 is between 0.008 mm and 0.01 mm, and the width is between 1 mm and 4 mm, which not only can achieve the purpose of storing the oil film, but also provides the lubricating effect, and is improved compared with the conventional model engine piston 3. The effective lubrication range between the piston 100 and the cylinder liner 301, and during the reciprocating motion of the piston 100, does not cause the piston 100 to be in close contact with the cylinder liner 301, resulting in loss of compression ratio, affecting The power output of the oil storage lubrication structure of the model engine cylinder liner 301.

Hereby, the characteristics of this creation and its achievable expected effects are as follows: The model engine piston with oil storage lubrication structure, the oil groove can be used to store oil to form an oil film, and the piston can be used for the piston. Lubrication, when the piston reciprocates, enhances the effective lubrication range between the piston and the cylinder liner and maintains the lubrication effect, thereby improving the protection of the piston and the cylinder liner, reducing the loss of the engine running process, maintaining the The piston reciprocates smoothly for a long time and at a high speed, thereby improving the efficiency and life of the engine.

In summary, this creation has its excellent progress and practicality in similar products. At the same time, it has investigated the technical information about such structures at home and abroad. The same structure has not been found in the literature. This creation has already possessed new types of patent requirements, and applied for it according to law.

However, the above-mentioned ones are only one of the preferred embodiments of the present invention, and the equivalent structural changes in the application of the present specification and the scope of the patent application are intended to be included in the scope of the present patent.

100‧‧‧Model engine piston with oil storage lubrication structure

10‧‧‧ trench

20‧‧‧Piston pin hole

21‧‧‧ piston pin

30‧‧‧ oil trench

301‧‧‧Cylinder liner

302‧‧‧air inlet

303‧‧‧Exhaust port

Claims (3)

A model engine piston having an oil-storing structure, the piston being disposed in a cylinder of a model engine, the cylinder being sleeved with a cylinder liner, and the piston is provided in an axial direction of the cylinder liner along the cylinder liner Reciprocating, and the inner wall of the cylinder liner is honed to form a plurality of grooves, and the outer peripheral wall of the piston is further radially provided with at least one groove, and the outer peripheral wall of the piston is further provided with a piston below the groove a pin hole, the piston pin hole is configured to sleeve a piston pin, the piston is mainly characterized by: at least one oil groove disposed transversely to the outer peripheral wall of the piston, and the lower edge of the oil groove is lower than the The upper edge of the piston pin hole, and the depth of the oil groove is between 0.008 mm and 0.01 mm, and the width is between 1 mm and 4 mm; thereby, the oil groove can be used for oil storage to form an oil film And can be used to lubricate the piston. A model engine piston having an oil-storing structure according to claim 1, wherein the oil groove is located at an upper edge of the piston pin hole. A model engine piston having an oil-storing structure according to claim 1, wherein the oil groove is located at a lower edge of the piston pin hole.