CN219299422U

CN219299422U - Novel engine piston

Info

Publication number: CN219299422U
Application number: CN202223404109.0U
Authority: CN
Inventors: 唐远明; 孙德山; 杨曾晨; 马全超; 沈振华; 许闽川; 文森; 张烨坤; 黄德志; 王礼亮; 洪继超; 苗宇昌
Original assignee: Chongqing Meifeng Qin'an Automobile Drive System Co ltd
Current assignee: Chongqing Meifeng Qin'an Automobile Drive System Co ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-07-04
Anticipated expiration: 2032-12-19

Abstract

The utility model discloses a novel engine piston, relates to the technical field of engines, and is mainly used for solving the problem of poor lubrication effect between a piston skirt part and a cylinder sleeve of the existing engine piston. The main structure is as follows: the piston main body is internally provided with a piston inner chamber, the lower surface of the piston main body is provided with an oil inlet, and the side wall of the piston main body is also provided with an inner chamber through hole communicated with the piston inner chamber. According to the novel engine piston provided by the utility model, engine oil sprayed into the inner chamber of the piston by the piston connecting rod can flow out from the through hole of the inner chamber, an oil film can be formed between the inner wall of the cylinder sleeve and the skirt part of the piston while cooling the surface of the piston, so that the abrasion and the cylinder pulling phenomenon are reduced, and the service life of the engine is prolonged.

Description

Novel engine piston

Technical Field

The utility model relates to the technical field of engines, in particular to a novel engine piston.

Background

When the engine is running, gasoline in the combustion chamber can burn to do work, so that the engine piston is pushed to do reciprocating motion. During this process, the engine piston is subjected to pressure and high temperatures from the combustion chamber, and therefore, the engine piston requires good cooling and lubrication during engine operation to ensure proper engine operation.

At present, engine pistons mainly utilize engine oil to cool and lubricate the engine pistons during working, namely, the engine oil sprayed at a piston connecting rod and a cooling nozzle is used for cooling the inner cavity part of the engine pistons, so that adverse phenomena of high carbon deposition at the piston heads, serious abrasion of piston rings, burnt and attached engine oil at the back sides of the pistons and the like are avoided. Meanwhile, since the engine piston reciprocates in the cylinder sleeve, a large amount of engine oil is required to lubricate between the skirt portion of the engine piston and the cylinder sleeve to form an oil film.

However, the current lubrication of the piston skirt can only be completed by means of a small amount of engine oil thrown from the oil pan to the inner wall of the cylinder sleeve during the rotation of the crankshaft, which results in poor lubrication effect between the piston skirt and the cylinder sleeve, serious abrasion of the piston skirt and the inner wall of the cylinder sleeve and even cylinder pulling.

Disclosure of Invention

The utility model aims to provide a novel engine piston, engine oil sprayed into an inner chamber of the piston by a piston connecting rod can flow out from a through hole of the inner chamber, an oil film can be formed between the inner wall of a cylinder sleeve and a skirt part of the piston while cooling the surface of the piston, and the phenomena of abrasion and cylinder pulling are reduced, so that the service life of the engine is prolonged.

In order to achieve the above purpose, the utility model provides a novel engine piston, which comprises a piston main body, wherein the edge of the upper surface of the piston main body is provided with a piston skirt part extending downwards, the lower surface of the piston main body is provided with a piston pin seat movably connected with the end part of a piston connecting rod, the interior of the piston main body is provided with a piston inner chamber, the lower surface of the piston main body is provided with an oil inlet communicated with the piston inner chamber, and the side wall of the piston main body is also provided with an inner chamber through hole communicated with the piston inner chamber.

As a further improvement of the utility model, the lower surface of the piston inner chamber is provided with an annular convex edge arranged along the upper edge of the oil inlet.

As a further improvement of the utility model, the oil inlet is a strip-shaped through hole.

As a further improvement of the utility model, one end of the inner chamber through hole close to the inner chamber of the piston is an input end, and one end of the inner chamber through hole far away from the inner chamber of the piston is an output end, and the level of the input end of the inner chamber through hole is lower than that of the upper end of the annular rib.

As a further development of the utility model, the level of the outlet end of the inner chamber through-opening is lower than the level of the inlet end thereof.

As a further improvement of the utility model, at least two groups of inner chamber through holes are arranged, and the two groups of inner chamber through holes are oppositely arranged at two sides of the oil inlet.

As a further improvement of the utility model, the inner chamber through holes are bar-shaped through holes.

As a further development of the utility model, the piston pin holder is provided with a pin bore for the articulated piston rod.

As a further development of the utility model, there are two of the piston pin bosses, which are arranged opposite each other.

As a further development of the utility model, the oil inlet is provided on the lower surface of the piston body between two piston pin bosses.

Compared with the prior art, the novel engine piston has the advantages that:

1. since the inner chamber through hole communicated with the inner chamber of the piston is arranged on the side wall of the piston main body, engine oil entering the inner chamber of the piston can flow out from the side surface of the piston main body through the inner chamber through hole to cool the surface of the piston. Meanwhile, the engine oil flowing out of the through hole of the inner chamber can be adhered to the inner wall of the cylinder sleeve along with the reciprocating movement of the piston main body, so that the engine oil adhesion quantity on the inner wall of the cylinder sleeve is improved, and a complete oil film can be formed between the inner wall of the cylinder sleeve and the skirt portion of the piston, so that the lubricating effect between the skirt portion of the piston and the cylinder sleeve is ensured, the abrasion and the cylinder pulling phenomenon are reduced, and the service life of the engine is prolonged.

2. The lower surface of the piston inner chamber is provided with an annular convex edge arranged along the upper edge of the oil inlet. By arranging the annular convex edges, a structure similar to an oil storage groove can be formed on the lower surface of the piston inner chamber, so that part of engine oil can be stored in the piston inner chamber, and along with the reciprocating movement of the piston main body, oscillation is formed, the piston is cooled, and the heat dissipation capacity is improved.

3. The horizontal height of the input end of the through hole of the inner chamber is lower than that of the upper end of the annular convex rib. The level of the output end of the through hole of the inner chamber is lower than that of the input end. By the design, engine oil accumulated in the oil storage groove can smoothly flow from the inner chamber through hole to the side surface of the piston main body, the lubricating effect between the piston skirt and the cylinder sleeve is ensured while the piston surface is cooled, and therefore abrasion and cylinder pulling phenomena are reduced, and the service life of an engine is prolonged.

The utility model will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate embodiments of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a front cross-sectional view of the present utility model;

FIG. 2 is a left cross-sectional view of the present utility model;

fig. 3 is a bottom view of the present utility model.

Wherein: 1-pin holes; 2-annular rib; 3-an inner piston chamber; 4-an inner chamber through hole; 5-a piston body; 51-oil inlet; 6-a piston pin boss; 7-piston skirt.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the embodiments of the present utility model, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the product of the present utility model is conventionally put when used, it is merely for convenience of describing the present utility model and simplifying the description, and it does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "horizontal," "vertical," "overhang" and the like, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present utility model, "plurality" means at least 3.

In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Embodiments of the present utility model will now be described with reference to the accompanying drawings.

Examples

Detailed description of the utility modelas shown in fig. 1-3, a novel engine piston comprises a piston body 5, wherein the edge of the upper surface of the piston body 5 is provided with a downwardly extending piston skirt 7. In this embodiment, the piston skirt 7 is disposed around the axial center of the piston main body 5 as a main member contacting the inner wall of the cylinder liner. Furthermore, in order to mount the piston body 5 to the piston rod, a piston pin boss 6 is provided on the lower surface of the piston body 5, which is movably connected to the end of the piston rod.

Wherein, piston inner chamber 3 is equipped with in piston main part 5 inside and be equipped with on the piston main part 5 lower surface with piston inner chamber 3 intercommunication oil inlet 51, still be equipped with on the piston main part 5 lateral wall with piston inner chamber 3 intercommunication's inner chamber through-hole 4. In this embodiment, the piston inner chamber 3 has a cylindrical structure, so that the surface area of the piston inner chamber 3 is large, and the engine oil can exchange heat better.

When the engine works, the splashed engine oil at the piston connecting rod can be input into the piston inner chamber 3 through the oil inlet 51 on the lower surface of the piston main body 5, so that the piston inner chamber 3 can be cooled, and further adverse phenomena of more carbon deposition at the head of the piston, serious abrasion of a piston ring, burnt and attached engine oil at the back side of the piston and the like are avoided. Furthermore, since the inner chamber through hole 4 communicating with the piston inner chamber 3 is provided on the side wall of the piston main body 5, the engine oil introduced into the piston inner chamber 3 can also flow out from the side surface of the piston main body 5 through the inner chamber through hole 4 to cool the piston surface. Meanwhile, the engine oil flowing out of the inner chamber through hole 4 can be attached to the inner wall of the cylinder sleeve along with the reciprocating movement of the piston main body 5, so that the engine oil attaching quantity on the inner wall of the cylinder sleeve can be improved. Thus, along with the reciprocating movement of the piston main body 5 in the cylinder sleeve, a complete oil film can be formed between the inner wall of the cylinder sleeve and the piston skirt 7, so that the lubricating effect between the piston skirt 7 and the cylinder sleeve is ensured, the abrasion and cylinder pulling phenomena are reduced, and the service life of the engine is prolonged.

With respect to the piston inner chamber 3, an annular rib 2 provided along an upper edge of the oil inlet 51 is provided on a lower surface of the piston inner chamber 3. The cross-sectional shape of the annular rib 2 is arc-shaped as shown in fig. 1. By providing the annular rib 2, a structure similar to an oil storage groove can be formed on the lower surface of the piston inner chamber 3, so that part of engine oil can be stored in the piston inner chamber 3, and along with the reciprocating movement of the piston main body 5, oscillation is formed in the piston inner chamber 3, the piston is cooled, and the heat dissipation capacity is improved.

In this embodiment, in order to adapt to the cross-sectional shape of the end portion of the piston rod, the engine oil ejected from the end portion of the piston rod can better enter the piston inner chamber 3, and the oil inlet 51 of the piston main body 5 is specifically designed as a strip-shaped through hole.

Regarding the specific structure of the inner chamber through hole 4, one end of the inner chamber through hole 4 close to the inner chamber 3 of the piston is an input end, one end far away from the inner chamber 3 of the piston is an output end, and the level of the input end of the inner chamber through hole 4 is lower than that of the upper end of the annular rib 2. The level of the output end of the inner chamber through hole 4 is lower than that of the input end. By the design, the engine oil accumulated in the oil storage groove can smoothly flow from the inner chamber through hole 4 to the side surface of the piston main body 5, the lubricating effect between the piston skirt 7 and the cylinder sleeve is ensured while the piston surface is cooled, the abrasion and the cylinder pulling phenomenon are further reduced, and the service life of the engine is prolonged.

In this embodiment, there are at least two sets of inner chamber through holes 4, and the two sets of inner chamber through holes 4 are oppositely disposed at two sides of the oil inlet 51. This design ensures that the oil in the piston chamber 3 can flow out evenly from the side walls on both sides of the piston body 5, thereby ensuring cooling and lubrication effects. Meanwhile, the inner chamber through holes 4 are strip-shaped through holes, so that the smoothness and the scattering area of engine oil outflow can be ensured.

In addition, in order to movably connect the piston pin boss 6 with the piston rod, a pin hole 1 for hinging the piston rod is provided on the piston pin boss 6. The two are hinged through a pin shaft penetrating through the pin hole 1 and the piston connecting rod. In this embodiment, there are two piston pin bosses 6, and the two piston pin bosses 6 are disposed opposite to each other. By such design, the stability of connection between the piston connecting rod and the piston main body 5 can be ensured. At the same time, the oil inlet 51 is arranged on the lower surface of the piston main body 5 between the two piston pin bosses 6, so that the engine oil sprayed out of the end part of the piston connecting rod can smoothly enter the piston inner chamber 3.

The utility model has been described in connection with the preferred embodiments, but the utility model is not limited to the embodiments disclosed above, but it is intended to cover various modifications, equivalent combinations according to the essence of the utility model.

Claims

1. The utility model provides a novel engine piston, includes piston main part (5), piston main part (5) upper surface edge is equipped with downwardly extending's piston skirt (7), be equipped with piston pin seat (6) with piston connecting rod tip swing joint on piston main part (5) lower surface, its characterized in that, piston main part (5) inside are equipped with piston inner chamber (3) and are equipped with oil inlet (51) with piston inner chamber (3) intercommunication on piston main part (5) lower surface, still be equipped with on piston main part (5) lateral wall with piston inner chamber (3) intercommunication's inner chamber through-hole (4).

2. A new engine piston according to claim 1, characterized in that the lower surface of the piston inner chamber (3) is provided with an annular rib (2) arranged along the upper edge of the oil inlet (51).

3. A new engine piston according to claim 2, characterized in that the oil inlet (51) is a strip-shaped through opening.

4. A novel engine piston according to claim 2 or 3, wherein the end of the inner chamber through hole (4) close to the inner chamber (3) of the piston is an input end, the end far away from the inner chamber (3) of the piston is an output end, and the input end of the inner chamber through hole (4) is lower than the upper end of the annular rib (2).

5. A new engine piston according to claim 4, characterized in that the level of the output end of the inner chamber through hole (4) is lower than the level of the input end thereof.

6. The novel engine piston according to claim 5, wherein at least two groups of inner chamber through holes (4) are provided, and the two groups of inner chamber through holes (4) are oppositely arranged at two sides of the oil inlet (51).

7. A new engine piston according to claim 6, characterized in that the inner chamber through-hole (4) is a bar-shaped through-hole.

8. A new engine piston according to claim 1, characterized in that the piston pin boss (6) is provided with a pin bore (1) for a hinged piston rod.

9. A new engine piston according to claim 8, characterized in that there are two piston pin bosses (6) and the two piston pin bosses (6) are arranged opposite each other.

10. A new engine piston according to claim 9, characterized in that the oil inlet (51) is provided on the lower surface of the piston body (5) between two piston pin bosses (6).