Engine piston head structure capable of enhancing heat dissipation performance

Abstract

The utility model discloses an engine piston head structure capable of enhancing heat dissipation performance, and belongs to the field of engine piston heads. The engine piston head structure capable of enhancing the heat dissipation performance comprises a piston head shell located in an engine and further comprises a first limiting ring welded to the inner wall of the engine, a movable hole is formed in the first limiting ring in a penetrating mode, and a second heat conduction piece is arranged on one side of the lower end of the piston head shell. According to the automobile piston, the problems that heat dissipation of an existing automobile piston is achieved through wrapping pieces installed through bolts in advance in the using process, and heat can still be accumulated at the upper end of the piston are solved; the first extending piece and the second extending piece can longitudinally move along with the piston head shell, gas can be extruded in the longitudinal moving process, and the gas is stably extruded and makes contact with the first cooling fins on the inner wall of the piston head shell.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of engine piston head, concretely to an engine piston head structure of enhanced heat dissipation performance. BACKGROUND

[0002] The engine piston head structure is one of the key components inside the engine, is usually made of high-strength alloy material, is designed with specific shape and size to adapt to the reciprocating motion in the cylinder, one end of the piston head is connected with the connecting rod, is converted into rotary power through the crankshaft, the surface often adopts wear-resistant, high-temperature-resistant treatment such as plating or special alloy to reduce friction, prevent thermal expansion and corrosion, the piston head can contain cooling oil channel inside to control temperature, the engine piston head structure is complex and precise, is an important guarantee for efficient and stable operation of the engine.

[0003] The Chinese patent with publication number CN208169006U discloses a high-precision corrosion-resistant and wear-resistant automobile piston, which comprises a piston head, a wrapping piece is arranged at the upper end of the piston head, a screw is fixedly connected to one end of the wrapping piece, the screw is provided with two groups, a nut is arranged inside the piston head, the wrapping piece is made of brass material, which has higher ignition point and hardness than aluminum material, so that the corrosion resistance and wear resistance of the piston head are effectively improved, the service life of the piston head is greatly prolonged, the corrosion-resistant coating has the characteristics of good corrosion resistance, heat dissipation and enhanced metal hardness, which can greatly enhance the hardness of the wrapping piece and convert heat into light substances for dissipation.

[0004] The automobile piston of the above-mentioned patent relies on the wrapping piece pre-installed by the screw to dissipate heat, the wrapping piece can convert heat into light substances for dissipation, but heat still accumulates at the upper end of the piston and cannot be transmitted to the lower end for efficient heat dissipation, and cannot be transmitted to the lower end to contact the heat dissipation liquid flowing inside the engine. UTILITY MODEL CONTENTS

[0005] The utility model discloses a kind of engine piston head structures of enhanced heat dissipation performance, after the connection of second heat-conducting sheet and first heat-conducting sheet, so that first extension piece and second extension piece move longitudinally along with piston head shell, gas is extruded in the process of longitudinal movement, so that gas is extruded and contacts the first heat-dissipating sheet of piston head shell inner wall stably, solve the problem proposed in the above background technique.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an engine piston head structure with enhanced heat dissipation performance, including a piston head shell located inside the engine, and a first limiting ring welded to the inner wall of the engine. The first limiting ring has a through-hole. A second heat-conducting plate is provided on one side of the lower end of the piston head shell, and a first heat-conducting plate is provided on the other side of the lower end of the piston head shell. A first extension plate is welded to the lower end of the second heat-conducting plate, and a second extension plate is welded to the lower end of the first heat-conducting plate.

[0007] Preferably, both the first extension piece and the second extension piece are provided with grooves inside, with the groove inside the first extension piece facing the second extension piece, and the groove inside the second extension piece facing both the piston head housing and the first extension piece.

[0008] Preferably, the length of the second heat-conducting sheet is shorter than the length of the first heat-conducting sheet.

[0009] Preferably, one of the first limiting rings is located at the lower end of the outer side of the first extension piece, and the other of the first limiting rings is located at the upper end of the outer side of the second extension piece.

[0010] Preferably, a first heat sink is provided between the lower end of the piston head housing and the first and second extension plates, and is welded and fixed to the piston head housing. The grooves inside the first and second extension plates are both welded with second heat sinks.

[0011] Preferably, the first heat-conducting sheet, the second heat-conducting sheet, the first extension sheet, and the second extension sheet are all made of copper.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] During engine startup and power generation, the piston head housing moves longitudinally back and forth, generating power. This longitudinal movement is synchronized with the longitudinal movement of the second and first heat-conducting plates. The second heat-conducting plate pushes the first extension plate, and the first heat-conducting plate pushes the second extension plate. During this pushing process, the orientation of the first extension plate and the restriction of the outer surrounding first limiting ring cause the gas at the lower end of the piston head housing to flow in from the movable hole at the lower end of the first extension plate when the piston head housing moves downward. After contacting the first heat sink, the gas is finally discharged from the adapter block at the lower end of the piston head housing. Conversely, when the piston head housing moves upward, the gas flow trajectory is reversed. During the flow, the gas fully contacts the first and second heat-conducting plates. The vertical back-and-forth movement of the piston head housing drives the gas flow, and the gas carries heat to flow rapidly to the lower end of the piston head housing, increasing the contact area with the engine's internal cooling fluid and improving the heat dissipation effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall external structure of this utility model;

[0015] Figure 2 This is an exploded view showing the positional relationship of the piston head shell of this utility model;

[0016] Figure 3 This is a schematic diagram of the gas flow trajectory when the piston head shell of this utility model moves longitudinally downward;

[0017] Figure 4 This is a schematic diagram of the gas flow trajectory when the piston head shell of this utility model moves longitudinally upward.

[0018] In the figure: 1. Piston head housing; 2. First heat-conducting plate; 3. Second heat-conducting plate; 4. First extension plate; 5. Second extension plate; 6. First limiting ring; 7. Movable hole; 8. First heat sink; 9. Second heat sink; 10. Adaptor block. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments.

[0020] Example 1

[0021] like Figure 1 and Figure 2 As shown, an engine piston head structure with enhanced heat dissipation performance in this embodiment includes a piston head shell 1. A transmission connecting rod is provided in the middle of the lower end of the piston head shell 1. When the piston head shell 1 is burning in the combustion chamber inside the engine, the piston head shell 1 will move longitudinally back and forth, and the power generated by the piston head shell 1 will be transmitted out through the connecting rod at the lower end of the piston head shell 1 to complete the output of engine power.

[0022] Among them, a second heat-conducting plate 3 is provided on one side of the lower end of the piston head shell 1, and a first heat-conducting plate 2 is provided on the other side of the lower end of the piston head shell 1. During the longitudinal reciprocating movement of the piston head shell 1, heat can first be transferred by the second heat-conducting plate 3 and the first heat-conducting plate 2. Secondly, the corresponding first extension plate 4 and second extension plate 5 can be moved by the second heat-conducting plate 3 and the first heat-conducting plate 2.

[0023] The lower end of the second heat-conducting sheet 3 is provided with a first extension sheet 4, and the first extension sheet 4 is welded and fixed to the second heat-conducting sheet 3. The lower end of the first heat-conducting sheet 2 is provided with a second extension sheet 5, and the second extension sheet 5 is welded and fixed to the first heat-conducting sheet 2.

[0024] In addition, the first heat-conducting plate 2, the second heat-conducting plate 3, the first extension plate 4 and the second extension plate 5 are all made of copper. The use of copper can improve the heat dissipation efficiency. The improved heat dissipation efficiency can directly improve the heat dissipation effect, and quickly transfer heat to the lower end of the piston head shell 1, so that the heat can quickly come into contact with the efficiently flowing gas, which facilitates the heat dissipation.

[0025] In order to ensure that the transferred heat is dissipated stably and quickly, such as Figure 3 and Figure 4 As shown, both the first extension plate 4 and the second extension plate 5 have grooves inside. The groove inside the first extension plate 4 faces the second extension plate 5, while the groove inside the second extension plate 5 faces both the piston head housing 1 and the first extension plate 4. The orientations of the first extension plate 4 and the second extension plate 5 are opposite. The oppositely positioned recesses allow the piston head housing 1 to drive the flow of gas during longitudinal reciprocating movement, so that the gas maintains efficient and stable flow and moves towards the piston head housing 1.

[0026] The length of the second heat-conducting plate 3 is shorter than that of the first heat-conducting plate 2. The difference in length between the second heat-conducting plate 3 and the first heat-conducting plate 2 directly adjusts the mounting position of the lower first extension plate 4. The connection between the second heat-conducting plate 3 and the first heat-conducting plate 2 allows the first extension plate 4 and the second extension plate 5 to move longitudinally back and forth together with the piston head shell 1. During the longitudinal back and forth movement, the first extension plate 4 and the second extension plate 5 will drive the gas to flow due to their different orientations, so that the gas can quickly and stably contact the piston head shell 1 and efficiently dissipate heat.

[0027] In order to stably assist the first extension plate 4 and the second extension plate 5 in pushing the gas, a first limiting ring 6 is provided around the lower end of the outer side of the first extension plate 4 and the upper end of the outer side of the second extension plate 5. The outer side of the first limiting ring 6 is welded and fixed to the inner wall of the engine. The first limiting ring 6 welded to the inner wall of the engine will restrict the first extension plate 4 and the second extension plate 5, so that the gas can move more easily with the movement of the first extension plate 4 and the second extension plate 5, and facilitate the gas to be drawn and contact the piston head shell 1 at the upper end.

[0028] Among them, the interior of each of the two first limiting rings 6 is provided with a semi-circular adapter block 10 facing the center of the piston head housing 1, and the adapter block 10 is welded and fixed to the first limiting ring 6. The first limiting ring 6 and the adapter block 10 welded inside can adapt to the shape of the first extension piece 4 and the second extension piece 5, which facilitates the extraction of gas and the flow of gas.

[0029] In order to enable the gas to quickly contact the piston head shell 1, the first extension plate 4 and the second extension plate 5 and complete the heat dissipation, a first heat dissipation fin 8 is provided between the lower end of the piston head shell 1 and the first extension plate 4 and the second extension plate 5, and the first heat dissipation fin 8 is welded and fixed to the piston head shell 1. The grooves inside the first extension plate 4 and the second extension plate 5 are provided with second heat dissipation fins 9, and the second heat dissipation fins 9 are welded and fixed to the first extension plate 4 and the second extension plate 5 respectively. The welded second heat dissipation fins 9 and the first heat dissipation fins 8 can increase the contact area between heat and gas, and achieve efficient heat dissipation during the gas flow process.

[0030] The welded second heat sink 9 and the groove facilitate the compression of gas, allowing the gas to flow toward the piston head housing 1. The reserved second heat sink 9, combined with longitudinal reciprocating movement, allows the gas to contact the first heat sink 8 on the outer wall of the piston head housing 1.

[0031] The first limiting ring 6 has a through hole 7. The adapter block 10 is located on one side of the through hole 7. The combination of the adapter block 10 and the first limiting ring 6 facilitates the formation of the through hole 7. During the longitudinal movement of the first extension piece 4 and the second extension piece 5, the first extension piece 4 and the second extension piece 5 will move into the through hole 7, which facilitates the extraction of gas.

[0032] Working principle: When the engine piston head is used and the engine is powered, the piston head housing 1 moves longitudinally back and forth to provide power. First, when the piston head housing 1 moves longitudinally downwards, it drives the first extension plate 4 towards the corresponding first limiting ring 6, while the second extension plate 5 moves away from the corresponding first limiting ring 6. With the first limiting ring 6 in place, the first extension plate 4 and the second extension plate 5 cause the gas at the lower end of the piston head housing 1 to move towards the piston head housing 1. The gas flows in through the movable hole 7 inside the first limiting ring 6 at the lower end of the first extension plate 4, and then contacts the first heat sink 8. Finally, the gas is discharged from the movable hole 7 inside the first limiting ring 6 at the upper end of the second extension plate 5. Secondly, when the piston head housing 1 moves vertically upward, it will drive the first extension plate 4 away from the corresponding first limiting ring 6, while the second extension plate 5 moves towards the corresponding first limiting ring 6. With the support of the first limiting ring 6, the gas moves towards the piston head housing 1. The gas flows in from the movable hole 7 inside the first limiting ring 6 at the upper end of the second extension plate 5. After contacting the first heat sink 8, it is finally discharged from the movable hole 7 inside the first limiting ring 6 at the lower end of the first extension plate 4. The piston head housing 1 drives the gas flow during the power supply process, efficiently dissipating heat.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An engine piston head structure for enhanced heat dissipation, comprising a piston head housing (1) located inside the engine, characterized in that, It also includes a first limiting ring (6) welded to the inner wall of the engine, the first limiting ring (6) having a through hole (7) inside, a second heat-conducting plate (3) provided on one side of the lower end of the piston head shell (1), a first heat-conducting plate (2) provided on the other side of the lower end of the piston head shell (1), a first extension plate (4) welded to the lower end of the second heat-conducting plate (3), and a second extension plate (5) welded to the lower end of the first heat-conducting plate (2).

2. The engine piston head structure with enhanced heat dissipation performance according to claim 1, characterized in that, The first extension piece (4) and the second extension piece (5) are both provided with grooves. The groove inside the first extension piece (4) faces the second extension piece (5), while the groove inside the second extension piece (5) faces both the piston head housing (1) and the first extension piece (4).

3. The engine piston head structure with enhanced heat dissipation performance according to claim 1, characterized in that, The length of the second heat-conducting plate (3) is shorter than the length of the first heat-conducting plate (2).

4. The engine piston head structure with enhanced heat dissipation performance according to claim 1, characterized in that, One of the first limiting rings (6) is located at the lower end outside the first extension piece (4), and the other of the first limiting rings (6) is located at the upper end outside the second extension piece (5).

5. The engine piston head structure with enhanced heat dissipation performance according to claim 4, characterized in that, A first heat sink (8) is provided between the lower end of the piston head shell (1) and the first extension plate (4) and the second extension plate (5) and is welded and fixed to the piston head shell (1). The grooves inside the first extension plate (4) and the second extension plate (5) are both welded with second heat sinks (9).

6. The engine piston head structure with enhanced heat dissipation performance according to claim 5, characterized in that, The first heat-conducting sheet (2), the second heat-conducting sheet (3), the first extension sheet (4), and the second extension sheet (5) are all made of copper.

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