CN222315243U - A piston structure with trapezoidal contact - Google Patents
A piston structure with trapezoidal contact Download PDFInfo
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- CN222315243U CN222315243U CN202421127120.3U CN202421127120U CN222315243U CN 222315243 U CN222315243 U CN 222315243U CN 202421127120 U CN202421127120 U CN 202421127120U CN 222315243 U CN222315243 U CN 222315243U
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- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000005465 channeling Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a trapezoid contact piston structure, relates to the technical field of pistons, and solves the technical problems that friction loss is large and engine efficiency improvement is affected due to the fact that the shape area of an existing piston skirt is large; the piston comprises a piston head and a piston skirt, wherein the piston skirt consists of a skirt top, a skirt bottom and a skirt edge, the skirt top is connected with the center of the lower surface of the piston head, the section of the skirt top is larger than the section of the skirt bottom, the skirt edge is positioned between the skirt top and the skirt bottom, the skirt top, the skirt bottom and the skirt edge are integrally formed, the skirt edge is of a conical cylindrical surface structure, the section of the skirt edge is trapezoid, the two sides of the section of the skirt edge are symmetrically arranged, and the two sides of the section of the skirt edge are inclined inwards. The utility model improves the traditional piston skirt from a cylindrical surface arc structure to an inward inclined conical cylindrical surface structure, not only effectively reduces the shape area of the piston skirt, but also reduces the overall weight of the piston, thereby reducing the friction loss of the engine and being beneficial to improving the efficiency of the engine.
Description
Technical Field
The utility model belongs to the technical field of pistons, and particularly relates to a trapezoid contact piston structure.
Background
The piston is a hollow cylinder that slides within the cylinder and has an outer diameter approximately equal to the cylinder bore, primarily for withstanding combustion pressures within the cylinder and transmitting this force to the crankshaft via the wrist pin and connecting rod. Further, the piston forms a combustion chamber with the cylinder head and cylinder walls. The structure of the piston is mainly divided into a top part, a head part and a skirt part, wherein the top part of the piston is a main part forming a combustion chamber, the shape of the piston is related to the selected combustion chamber form, the head part of the piston is a part above a piston pin seat, a piston ring is arranged to prevent high-temperature and high-pressure gas from channeling into a crankcase, meanwhile, engine oil is prevented from channeling into the combustion chamber, and all parts below a piston ring groove are called piston skirt. The piston operates at high temperature, high pressure, high speed, and poor lubrication, and therefore, both its design and material selection are important, and the material of the piston is generally sufficiently heat resistant, wear resistant, and strong to ensure stable and reliable operation in harsh operating environments. The variety of pistons is varied, and the design and construction of the pistons may vary according to the application environment and requirements, for example, internal combustion engine pistons, compressor pistons, hydraulic pistons, etc., each of which plays an important role in its particular application area.
The shape of the piston skirt is usually a cylinder, the piston skirt and the inner wall of the cylinder form a sealed space, the reciprocating motion of the piston in the cylinder is ensured to effectively realize the compression, combustion and discharge of working medium in the cylinder, and in order to ensure the tightness between the piston and the cylinder, an extremely precise fit clearance is usually required to be formed between the piston skirt and the inner wall of the cylinder.
Because the piston skirt is generally in a cylindrical structure, the shape area of the piston skirt is larger, so that the friction loss is larger, and the improvement of the engine efficiency is further influenced.
Disclosure of utility model
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a trapezoid contact piston structure, which solves the problem that the friction loss is large due to the large shape area of the existing piston skirt part, so that the improvement of the engine efficiency is influenced.
To achieve the above object, an embodiment according to a first aspect of the present utility model provides a trapezoidal contact piston structure, including a piston head and a piston skirt, wherein the piston skirt is composed of a skirt top, a skirt bottom and a skirt edge, the skirt top is connected to a center of a lower surface of the piston head, a cross section of the skirt top is larger than a cross section of the skirt bottom, the skirt edge is located between the skirt top and the skirt bottom, the skirt top, the skirt bottom and the skirt edge are integrally formed, the skirt edge is in a conical cylindrical surface structure, and the cross section of the skirt edge is trapezoidal.
As a further technical scheme of the utility model, the two sides of the section of the skirt are symmetrically arranged, and the two sides of the section of the skirt incline inwards.
As a further technical scheme of the utility model, rib plates are symmetrically arranged between the piston head and the piston skirt.
As a further technical scheme of the utility model, the two sides of the section of the skirt edge are inclined inwards by 7 degrees.
As a further technical scheme of the utility model, the positions of the skirt bottoms close to the two ends are arc-shaped structures, and the middle parts of the skirt bottoms are arranged in a plane structure.
As a further technical scheme of the utility model, the top end of the rib plate is fixedly connected with the lower surface of the piston head, and one side of the rib plate is in fit connection with the side surface of the skirt.
Compared with the prior art, the utility model has the beneficial effects that:
In the utility model, the skirt edge of the piston skirt is designed into the inward inclined conical cylindrical surface structure, so that compared with the original cylindrical surface arc structure, the shape area of the piston skirt is effectively reduced, the integral weight of the piston is reduced, the friction loss of the engine is reduced, and the efficiency of the engine is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art piston structure;
FIG. 2 is a schematic view of a prior art piston skirt;
FIG. 3 is a schematic diagram of a trapezoidal contact piston structure according to the present utility model;
fig. 4 is a schematic view of a piston skirt in a trapezoidal contact piston structure according to the present utility model.
In the figure, 1, a piston head, 2, a piston skirt, 201, a skirt top, 202, a skirt bottom, 203, a skirt edge, 3 and rib plates.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present utility model, not all embodiments. 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.
As shown in fig. 1-4, a trapezoid-contact piston structure comprises a piston head 1 and a piston skirt 2, wherein the piston skirt 2 is composed of a skirt top 201, a skirt bottom 202 and a skirt edge 203, the skirt top 201 is connected with the center of the lower surface of the piston head 1, the cross section of the skirt top 201 is larger than that of the skirt bottom 202, the skirt edge 203 is positioned between the skirt top 201 and the skirt bottom 202, the skirt top 201, the skirt bottom 202 and the skirt edge 203 are integrally formed, the positions, close to two ends, of the skirt bottom 202 are arc-shaped, and the middle part of the skirt bottom 202 is in a plane structure, so that the skirt bottom 202 can better adapt to the shape of a cylinder when the piston moves in the cylinder, collision and friction with the cylinder wall are reduced, and durability of the piston and performance of an engine are improved.
Compared with a piston skirt (refer to fig. 1-2) with a cylindrical surface arc structure in the prior art, in the embodiment, the skirt 203 is in a conical cylindrical surface structure, the cross section of the skirt 203 is trapezoid, so that the shape area of the piston skirt 2 is effectively reduced, the overall weight of the piston can be reduced, the friction loss of an engine is reduced, the efficiency of the engine is improved, two sides of the cross section of the skirt 203 are symmetrically arranged, two sides of the cross section of the skirt 203 are inclined inwards, and the angle of the two sides of the cross section of the skirt 203 inclined inwards is 7 degrees.
The rib plate 3 is symmetrically arranged between the piston head 1 and the piston skirt 2, the rib plate 3 not only enhances the overall structural strength of the piston, so that the piston can bear higher working pressure, but also plays a role in guiding and stabilizing when the piston moves, the piston is ensured to move stably and accurately in the cylinder, the top end of the rib plate 3 is fixedly connected with the lower surface of the piston head 1, one side of the rib plate 3 is in joint connection with the side face of the skirt 203, and the connecting mode enables the rib plate 3 to effectively transfer the force of the piston head 1 to the skirt 203, so that the overall working performance of the piston is improved.
The working principle of the utility model is that the piston skirt with the original cylindrical surface arc structure is designed into a conical cylindrical surface structure with two inwards inclined sides, the improved piston skirt 2 consists of a skirt top 201, a skirt bottom 202 and a skirt 203, the skirt 203 is of a conical cylindrical surface structure with two inwards inclined sides, the shape and the area are effectively reduced, the overall weight of the piston is reduced, the friction loss of the engine is reduced, and the efficiency of the engine is improved.
The above embodiments are only for illustrating the technical method of the present utility model and not for limiting the same, and it should be understood by those skilled in the art that the technical method of the present utility model may be modified or substituted without departing from the spirit and scope of the technical method of the present utility model.
Claims (6)
1. The utility model provides a piston structure of trapezoidal contact, includes piston head (1) and piston skirt (2), its characterized in that, piston skirt (2) are by skirt top (201), skirt bottom (202) and shirt rim (203) are constituteed, the center department of skirt top (201) and piston head (1) lower surface is connected, and the cross-section of skirt top (201) is greater than the cross-section of skirt bottom (202), shirt rim (203) are located between skirt top (201) and skirt bottom (202), and skirt top (201), skirt bottom (202) and shirt rim (203) integrated into one piece, shirt rim (203) are toper cylindrical surface structure, and the cross-section of shirt rim (203) is trapezoidal.
2. A trapezoidal contact piston structure according to claim 1, wherein the skirt (203) is symmetrically disposed on both sides of the cross section, and both sides of the cross section of the skirt (203) are inclined inward.
3. A trapezoidal contact piston structure according to claim 1, characterized in that ribs (3) are symmetrically arranged between the piston head (1) and the piston skirt (2).
4. A trapezoidal contact piston structure according to claim 2, wherein the skirt (203) is inclined inwardly at an angle of 7 ° on both sides of the cross section.
5. A trapezoidal contact piston structure according to claim 1, wherein the skirt bottom (202) is of an arc-shaped structure near both ends, and the middle portion of the skirt bottom (202) is of a planar structure.
6. A trapezoidal contact piston structure according to claim 3, wherein the top end of the rib plate (3) is fixedly connected with the lower surface of the piston head (1), and one side of the rib plate (3) is in fit connection with the side face of the skirt (203).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421127120.3U CN222315243U (en) | 2024-05-22 | 2024-05-22 | A piston structure with trapezoidal contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421127120.3U CN222315243U (en) | 2024-05-22 | 2024-05-22 | A piston structure with trapezoidal contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222315243U true CN222315243U (en) | 2025-01-07 |
Family
ID=94097634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421127120.3U Active CN222315243U (en) | 2024-05-22 | 2024-05-22 | A piston structure with trapezoidal contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222315243U (en) |
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2024
- 2024-05-22 CN CN202421127120.3U patent/CN222315243U/en active Active
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