Lightweight automobile piston

Abstract

The utility model relates to the technical field of automobile pistons, and discloses a lightweight automobile piston which comprises a piston head and a connecting rod body, the piston head is in a dome shape, a plurality of annular grooves are formed in the outer surface of the piston head, and a cooling oil cavity is formed in the top end in the piston head. The cooling oil cavity annularly surrounds the piston head in the circumferential direction, the piston skirt is fixedly installed at the bottom end of the piston head, the piston head is designed to be in a dome shape, the flowing state of mixed gas in a combustion chamber can be optimized, the annular cooling oil cavity in the piston guides cooling oil to circularly flow, heat generated by combustion of the piston head is rapidly taken away, and the combustion efficiency is improved. The performance of materials is effectively prevented from being reduced or deformed due to high temperature, the grooves formed in the two sides of the piston skirt portion reduce the material consumption on the premise that the overall strength is guaranteed, light weight is achieved, energy consumption is reduced, the reinforcing ribs longitudinally distributed on the outer surface enhance the structural strength of the piston, the piston is kept stable when bearing lateral force and thermal deformation, and the service life of the piston is prolonged. The piston working reliability is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive piston technology, and in particular to a lightweight automotive piston. Background Technology

[0002] The development of the automotive industry has led to increasingly higher requirements for energy conservation and emission reduction. As the core component of automobiles, the performance improvement of the engine is crucial. As one of the key components of the engine, the weight and performance of the piston directly affect the engine's power output, fuel economy and reliability. The piston is a reciprocating component in the cylinder block of an automobile engine. The basic structure of the piston can be divided into the top, head and skirt. The piston top is the main part that makes up the combustion chamber, and its shape is related to the type of combustion chamber selected. Gasoline engines mostly use flat-top pistons, which have the advantage of a small heat absorption area.

[0003] Traditional automotive pistons are typically made of cast iron or ordinary aluminum alloy, which are relatively heavy. The increased weight of the piston increases the reciprocating inertial force of the engine, resulting in greater energy consumption. In addition, the structural design of traditional pistons has certain limitations in terms of heat dissipation and strength distribution, which can easily lead to localized overheating of the piston, affecting its service life and the overall performance of the engine. Therefore, we propose a lightweight automotive piston. Utility Model Content

[0004] The purpose of this invention is to provide a lightweight automotive piston to solve the problem that traditional automotive pistons are usually made of cast iron or ordinary aluminum alloy, which are heavy. The heavy piston increases the reciprocating inertial force of the engine, resulting in more energy consumption. In addition, the structural design of traditional pistons has certain limitations in terms of heat dissipation and strength distribution, which can easily lead to local overheating of the piston, affecting the service life of the piston and the overall performance of the engine.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a lightweight automotive piston, comprising a piston head and a connecting rod body, wherein the piston head is dome-shaped, the outer surface of the piston head is provided with multiple annular grooves, and the top of the piston head is provided with a cooling oil chamber, the cooling oil chamber being annularly surrounding the circumference of the piston head, a piston skirt is fixedly installed at the bottom end of the piston head, and a piston pin seat is fixedly installed inside the piston skirt.

[0006] As a preferred embodiment, grooves are provided on both sides of the piston skirt.

[0007] As a preferred embodiment, the outer surface of the piston skirt is provided with a plurality of raised reinforcing ribs, which are longitudinally distributed on the outer surface of the piston skirt.

[0008] As a preferred embodiment, the piston pin seat is made of high-strength aluminum alloy material, and the piston pin seat has a pin hole inside, and a positioning piston pin is installed inside the pin hole, and the axial direction of the positioning piston pin is the direction of the grooves on both sides.

[0009] As a preferred embodiment, a connecting rod head is fixedly installed on the top of the connecting rod body. The connecting rod head is located inside the piston pin seat, and the surface of the connecting rod head is provided with a shaft hole that matches the positioning piston pin. A connecting rod cover is provided at the bottom of the connecting rod body.

[0010] As a preferred embodiment, connecting rod bearings are fixedly installed on the inner walls of the connecting rod body and the connecting rod cover on opposite sides, and positioning sleeves are fixedly installed on both sides of the connecting rod body and the connecting rod cover. The positioning sleeves are provided with countersunk threaded holes, and connecting rod bolts are connected to the countersunk threaded holes.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. By setting the piston head and piston skirt, the piston head is designed in a dome shape, which can optimize the flow state of the air-fuel mixture in the combustion chamber and improve combustion efficiency. The annular groove on its surface is used to install piston rings to ensure the sealing of the combustion chamber. The annular cooling oil chamber inside guides the cooling oil to circulate and quickly remove the heat generated by the piston head due to combustion, effectively preventing the material from degrading or deforming due to high temperature. The grooves on both sides of the piston skirt reduce the amount of material used while ensuring the overall strength, achieving weight reduction and reducing energy consumption. Multiple reinforcing ribs distributed longitudinally on the outer surface further enhance its structural strength and rigidity, making it stable when subjected to lateral forces and thermal deformation, and improving the reliability of piston operation.

[0013] 2. By setting up a connecting rod body, the connecting rod head at the top of the connecting rod body is embedded in the piston pin seat. Through the shaft hole and precise cooperation with the positioning piston pin, a stable hinge connection between the piston and the connecting rod is achieved, which efficiently transmits power and converts the reciprocating motion of the piston into the swing of the connecting rod. The connecting rod body and the connecting rod cover are precisely positioned and fastened by the positioning sleeve and connecting rod bolts. The connecting rod bearings on the inner walls of both effectively reduce frictional loss between the connecting rod and the crankshaft, ensuring that the connecting rod assembly is stable and reliable during engine operation and extending the service life of the components. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a bottom-view structural diagram of the present invention;

[0016] Figure 3 This is a partial unfolded structural diagram of the present invention;

[0017] Figure 4This is a schematic diagram of the piston head and piston skirt structure of this utility model.

[0018] In the diagram: 1. Piston head; 2. Piston skirt; 3. Connecting rod body; 4. Piston pin seat; 5. Connecting rod head; 6. Positioning piston pin; 7. Connecting rod cap; 8. Positioning sleeve; 9. Connecting rod bolt; 10. Connecting rod bearing; 11. Annular groove; 12. Cooling oil chamber; 13. Groove; 14. Reinforcing rib. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1:

[0021] Please see the appendix Figure 1 - Appendix Figure 4 A lightweight automotive piston includes a piston head 1 and a connecting rod body 3. The piston head 1 is dome-shaped, with multiple annular grooves 11 on its outer surface and a cooling oil chamber 12 at its top. The cooling oil chamber 12 is annularly arranged around the circumference of the piston head 1. A piston skirt 2 is fixedly installed at the bottom of the piston head 1, and a piston pin seat 4 is fixedly installed inside the piston skirt 2. Grooves 13 are provided on both sides of the piston skirt 2, and multiple raised reinforcing ribs 14 are provided on the outer surface of the piston skirt 2. The multiple reinforcing ribs 14 are longitudinally distributed on the outer surface of the piston skirt 2. The piston pin seat 4 is made of high-strength aluminum alloy, and a pin hole is provided inside the piston pin seat 4. A positioning piston pin 6 is installed inside the pin hole, and the axial direction of the positioning piston pin 6 is the direction of the grooves 13 on both sides.

[0022] The depth and width of the annular groove 11 are optimized to ensure the normal installation and operation of the piston rings while reducing material usage, thereby reducing the weight of the piston head 1. The engine's oil pump provides pressure, allowing lubricating oil to flow from the engine block's oil passages into the cooling oil chamber 12 of the piston head 1. The lubricating oil flows in from one end of the cooling oil chamber 12, absorbing heat from the piston head 1 during its flow within the chamber, and then flows out from the other end, returning to the engine's oil pan or oil cooling system. Without the cooling oil chamber 12, the lubricating oil would only briefly flow across the surface of the piston head 1, resulting in a small contact area, short contact time, limited heat absorption, and significantly reduced heat dissipation efficiency. The dome-shaped design of the piston head 1 alters the spatial shape within the combustion chamber. When the piston moves upward to compress the air-fuel mixture, the dome-shaped surface can guide the mixture to generate specific flow patterns, such as forming vortices or squeeze flows. This flow allows the air-fuel mixture to be distributed more evenly within the combustion chamber and increases the contact between the mixture and the area around the spark plug, which is beneficial for the rapid propagation of the flame after ignition, thereby improving combustion efficiency.

[0023] Specifically, the annular cooling oil chamber 12 provided in the piston head 1 can effectively guide the circulation of cooling oil, quickly dissipate heat from the piston head 1, and prevent the piston from undergoing material performance degradation or thermal deformation due to high temperature. The grooves 13 on both sides of the piston skirt 2 reduce the amount of material used while ensuring the overall strength of the piston, achieving a lightweight design of the piston and reducing energy loss during vehicle operation. The multiple reinforcing ribs 14 longitudinally distributed on the outer surface of the piston skirt 2 enhance the structural strength and rigidity of the piston skirt 2 while reducing weight, enabling it to better withstand lateral forces and thermal deformation. In addition, the dome-shaped design of the piston head 1 helps to improve the combustion efficiency of the air-fuel mixture in the combustion chamber, and the annular groove 11 is used to install piston rings.

[0024] Example 2:

[0025] Please see the appendix Figure 1 - Appendix Figure 3 Furthermore, based on Embodiment 1, the connecting rod body 3 is further provided with a connecting rod head 5 fixedly installed on its top. The connecting rod head 5 is located inside the piston pin seat 4, and the surface of the connecting rod head 5 is provided with a shaft hole that matches the positioning piston pin 6. The bottom of the connecting rod body 3 is provided with a connecting rod cover 7. Connecting rod bearings 10 are fixedly installed on the inner walls of the opposite side of the connecting rod body 3 and the connecting rod cover 7. Positioning sleeves 8 are fixedly installed on both sides of the connecting rod body 3 and the connecting rod cover 7. The interior of the positioning sleeves 8 is provided with countersunk threaded holes, and connecting rod bolts 9 are connected to the internal threads of the countersunk threaded holes.

[0026] Compared to traditional full-skirt pistons, the piston skirt 2 design with grooves 13 on both sides significantly reduces the weight of the piston and reduces the friction area between the piston and the cylinder wall, thus reducing friction loss. The connection between the piston pin seat 4 and the piston skirt 2 adopts a transition fillet design. The radius of the transition fillet has been optimized to effectively disperse stress, avoid stress concentration, and improve the overall strength and reliability of the piston. During engine operation, the piston needs to withstand a lot of lateral force and thermal deformation. If the reinforcing ribs 14 are not provided, and the piston skirt 2 itself is used to resist these forces, the thickness of the piston skirt 2 needs to be increased or a thicker material needs to be used. This would increase the weight, and it may not be able to meet the strength and rigidity requirements well.

[0027] Specifically, the connecting rod head 5 at the top of the connecting rod body 3 is located inside the piston pin seat 4, and the shaft hole on its surface is adapted to the positioning piston pin 6, so that a stable and flexible connection is formed between the piston and the connecting rod. This can more effectively convert the reciprocating motion of the piston into the oscillation of the connecting rod, thereby optimizing the power transmission process. The connecting rod bearing 10 installed on the inner wall of the connecting rod body 3 and the connecting rod cover 7 on opposite sides can reduce the friction and wear between the connecting rod and the crankshaft, and extend the service life of the components. At the same time, through the cooperation of the positioning sleeve 8 and the connecting rod bolt 9, a reliable connection and precise positioning of the connecting rod body 3 and the connecting rod cover 7 are achieved, ensuring the stability of the connecting rod assembly during engine operation.

[0028] The working principle of this utility model is as follows: This utility model is a lightweight automotive piston. The manufactured lightweight automotive piston is installed in the cylinder of the engine. When the car engine is working, the dome-shaped design of the piston head 1 promotes good flow of the air-fuel mixture in the combustion chamber. With the piston ring installed in the annular groove 11, the combustion efficiency of the air-fuel mixture is improved. The heat generated by combustion is transferred through the piston head 1. The cooling oil in the annular cooling oil chamber 12 circulates and carries away the heat, preventing the piston from degrading or deforming due to high temperature. The grooves 13 on both sides of the piston skirt 2 achieve lightweighting, while the longitudinal reinforcing ribs 14 ensure its structural strength to withstand lateral forces and thermal deformation. During operation, the piston reciprocates in the cylinder. The connecting rod head 5 at the top of the connecting rod body 3 cooperates with the positioning piston pin 6 in the piston pin seat 4 through the shaft hole, converting the reciprocating motion of the piston into the swing of the connecting rod. The connecting rod body 3 and the connecting rod cover 7 are precisely connected by the positioning sleeve 8 and the connecting rod bolt 9. The connecting rod bearing 10 on the inner wall reduces friction with the crankshaft, ensuring stable power transmission, thereby driving the engine to run. At this point, the entire process is complete.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lightweight automotive piston, comprising a piston head (1) and a connecting rod body (3), characterized in that: The piston head (1) is dome-shaped. The outer surface of the piston head (1) is provided with multiple annular grooves (11). The top of the piston head (1) is provided with a cooling oil chamber (12). The cooling oil chamber (12) is annularly surrounding the circumference of the piston head (1). The bottom end of the piston head (1) is fixedly installed with a piston skirt (2). The piston skirt (2) is fixedly installed with a piston pin seat (4).

2. A lightweight automotive piston according to claim 1, characterized in that: The piston skirt (2) has grooves (13) on both sides.

3. A lightweight automotive piston according to claim 1, characterized in that: The outer surface of the piston skirt (2) is provided with a plurality of raised reinforcing ribs (14), which are longitudinally distributed on the outer surface of the piston skirt (2).

4. A lightweight automotive piston according to claim 1, characterized in that: The piston pin seat (4) is made of high-strength aluminum alloy material. The piston pin seat (4) has a pin hole inside, and a positioning piston pin (6) is installed inside the pin hole. The axial direction of the positioning piston pin (6) is the direction of the two side grooves (13).

5. A lightweight automotive piston according to claim 1, characterized in that: A connecting rod head (5) is fixedly installed on the top of the connecting rod body (3). The connecting rod head (5) is located inside the piston pin seat (4), and the surface of the connecting rod head (5) is provided with a shaft hole that matches the positioning piston pin (6). A connecting rod cover (7) is provided at the bottom of the connecting rod body (3).

6. A lightweight automotive piston according to claim 5, characterized in that: Connecting rod bearings (10) are fixedly installed on the inner walls of the opposite side of the connecting rod body (3) and the connecting rod cover (7). Positioning sleeves (8) are fixedly installed on both sides of the connecting rod body (3) and the connecting rod cover (7). The positioning sleeves (8) are provided with countersunk threaded holes, and connecting rod bolts (9) are connected to the countersunk threaded holes.

Images