High-strength piston pin

Abstract

The utility model provides a high-strength piston pin, which belongs to the technical field of piston processing, and comprises a piston pin body, one end of the piston pin body is provided with two mounting grooves, one end of the piston pin body is fixedly connected with two connecting blocks, one end of each connecting block is fixedly connected with a connecting rod, and the other end of each connecting block is fixedly connected with a connecting rod. Heat release grooves are formed in the two sides of the piston pin body, the heat release grooves, heat transfer blocks, heat dissipation grooves and heat absorption rings are integrated in the design of the piston pin body, the heat release grooves, the heat transfer blocks, the heat dissipation grooves and the heat absorption rings are jointly matched to be used for heat transfer and dissipation, and the heat release grooves and the heat dissipation grooves provide extra surface areas to promote heat exchange. And the heat transfer block accelerates the conduction of heat from the interior of the piston pin to an external cooling system, so that the stability and reliability of the piston pin in a high-temperature working environment are favorably maintained, the damage of thermal stress to parts is reduced, and the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of piston processing, and particularly relates to a high-strength piston pin. Background Art

[0002] The piston pin is a cylindrical pin installed on the piston skirt. Its middle part passes through the small hole of the connecting rod and is used to connect the piston and the connecting rod. Its function is to transmit the gas force borne by the piston to the connecting rod, or to make the small end of the connecting rod drive the piston to move together. In order to reduce weight, the piston pin is generally made of high-quality alloy steel and made hollow.

[0003] The authorization publication number "CN214999350U" records that "the utility model relates to the technical field of piston accessories, specifically to a high-strength piston pin, including a piston pin body, the piston pin body having a hollow structure, the outer peripheral surface of the piston pin body being detachably installed with a wear-resistant sleeve, and also including an axial limiting structure for limiting the wear-resistant sleeve in the axial direction and a radial limiting structure for limiting the wear-resistant sleeve in the radial direction. The wear-resistant sleeve is arranged on the outer peripheral surface of the piston pin body, which effectively increases the wear resistance of the piston pin and extends the service life of the piston pin, which is equivalent to enhancing the strength of the piston pin and reducing the replacement frequency of the piston pin; through the setting of the axial limiting structure and the radial limiting structure, the wear-resistant sleeve is more comprehensively limited on the piston pin body, and even if it moves back and forth, the wear-resistant sleeve will not be separated from the piston pin body; the dovetail groove has a better radial limiting effect on the insert than the ordinary slot; the U-shaped insert rod has a larger contact area with the U-shaped socket, and the clamping effect is better."

[0004] The above patent enhances the wear resistance of the piston pin by integrating the hollow body and the external wear-resistant sleeve design, directly extending the service life of the components, reducing the need for frequent replacement, and thus improving the operating reliability of the engine. The precise coordination of the dovetail groove and the U-shaped plug-in structure not only optimizes the limiting effect, but also greatly enhances the firmness and durability of the connection, improves the wear resistance of the piston pin, and extends the service life of the piston pin. However, the piston pin in the above device has poor heat dissipation under long-term high-temperature operation, which will lead to a decrease in the physical properties of the piston pin, thereby affecting its normal function of transmitting combustion force to the connecting rod, directly affecting the load-bearing capacity and wear resistance of the piston pin, and reducing the service life of the device. Utility Model Content

[0005] The purpose of the utility model is to provide a high-strength piston pin, aiming to solve the problem in the prior art that the piston pin in the above-mentioned device has poor heat dissipation under long-term high-temperature operation, which leads to a decrease in the physical properties of the piston pin, thereby affecting its normal function of transmitting combustion force to the connecting rod, directly affecting the load-bearing capacity and wear resistance of the piston pin, and reducing the service life of the device.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A high-strength piston pin, comprising:

[0008] The piston pin body has two mounting grooves at one end of the piston pin body, and two connecting blocks are fixedly connected to one end of the piston pin body, and one end of each of the two connecting blocks is fixedly connected to a connecting rod. Heat release grooves are provided on both sides of the piston pin body, and one end of each of the two connecting rods is fixedly connected to a heat transfer block. A movable groove is provided at one end of the piston pin body, and one end of each of the two connecting rods is fixedly connected to a positioning block. A heat absorption ring is fixedly connected to the inner circumferential surface of the piston pin body, and one end of each of the two positioning blocks is fixedly connected to a heat dissipation groove.

[0009] As a preferred solution of the present invention, the outer surface of the piston pin body is fixedly connected with a wear-resistant layer, the surface of the wear-resistant layer is provided with a plurality of annular grooves, and the inner circumferential surface of the heat-absorbing ring is fixedly connected with a stabilizing block.

[0010] As a preferred solution of the present invention, a plurality of ventilation holes are provided at one end of the stabilizing block.

[0011] As a preferred solution of the present invention, a plurality of heat dissipation holes are provided at one end of the wear-resistant layer.

[0012] As a preferred solution of the present invention, two through holes are provided at one end of the stabilizing block, an oil groove is provided at one end of the piston pin body, an oil passage is provided at one end of the piston pin body, and an oil outlet is provided on the outer circumferential surface of the piston pin body.

[0013] As a preferred solution of the present invention, one end of the positioning block is fixedly connected to a fixing block, and one end of the fixing block is fixedly connected to the inner circumferential surface of the heat absorption ring.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. In this solution, the piston pin body is designed to integrate a heat release groove, a heat transfer block, a heat sink, and a heat absorption ring. These components work together to transfer and dissipate heat. The heat release groove and heat sink provide additional surface area to promote heat exchange, while the heat transfer block accelerates the conduction of heat from the interior of the piston pin to the external cooling system, helping to maintain the stability and reliability of the piston pin in high-temperature working environments, reducing damage to components caused by thermal stress, and extending the service life of the device.

[0016] 2. In this solution, the design of the through-holes, oil grooves, oil passages and oil outlets on the stabilizing block enables effective circulation of lubricating oil, which not only provides good lubrication conditions for the piston pin, but also further enhances cooling efficiency, reduces internal wear, and improves overall working efficiency and durability. The setting of the fixing block strengthens the connection stability between the heat-absorbing ring and the piston pin body, indirectly ensuring the sealing and efficiency of the lubrication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is the main perspective view in the present utility model;

[0019] Figure 2 This is the first main sectional perspective view of the present utility model;

[0020] Figure 3 For the utility model Figure 2 A partial enlarged view of point A in the middle:

[0021] Figure 4 It is a side sectional perspective view of the present invention.

[0022] In the figure: 1. Piston pin body; 2. Mounting groove; 3. Connecting block; 4. Connecting rod; 5. Heat release groove; 6. Heat transfer block; 7. Movable groove; 8. Positioning block; 9. Heat absorption ring; 10. Heat dissipation groove; 11. Wear-resistant layer; 12. Ring groove; 13. Stabilizing block; 14. Ventilation hole; 15. Heat dissipation hole; 16. Through hole; 17. Oil groove; 18. Oil passage; 19. Oil outlet; 20. Fixing block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1

[0025] See also Figure 1-4 , the utility model provides the following technical solutions:

[0026] A high-strength piston pin, comprising:

[0027] The piston pin body 1 has two mounting grooves 2 at one end of the piston pin body 1, and two connecting blocks 3 are fixedly connected to one end of the piston pin body 1. One end of the two connecting blocks 3 is fixedly connected to a connecting rod 4. Heat release grooves 5 are provided on both sides of the piston pin body 1, and one end of the two connecting rods 4 is fixedly connected to a heat transfer block 6. A movable groove 7 is provided at one end of the piston pin body 1, and one end of the two connecting rods 4 is fixedly connected to a positioning block 8. A heat absorption ring 9 is fixedly connected to the inner circumferential surface of the piston pin body 1, and one end of the two positioning blocks 8 is fixedly connected to a heat dissipation groove 10.

[0028] In a specific embodiment of the present utility model, when the device is needed, mounting grooves 2 are provided at both ends of the piston pin body 1 to adapt to other engine components. The precise positions of the heat transfer block 6 and the positioning block 8 are ensured by the fixedly connected connecting block 3 and the connecting rod 4. The heat transfer block 6 is directly connected to the connecting rod 4, effectively conducting a large amount of heat energy generated during the operation of the piston. The heat dissipation grooves 10 equipped on the heat transfer block 6 further accelerate the dissipation of heat to the engine cooling system, effectively suppressing local overheating, thereby promoting the circulation of internal hot air flow and enhancing heat exchange efficiency. The design of the movable groove 7 ensures the flexible movement of the piston pin under high-load operation of the engine, reducing friction loss.

[0029] For details, please refer to Figure 2 The outer surface of the piston pin body 1 is fixedly connected with a wear-resistant layer 11, and the surface of the wear-resistant layer 11 is provided with a plurality of annular grooves 12. The inner circumferential surface of the heat-absorbing ring 9 is fixedly connected with a stabilizing block 13.

[0030] In this embodiment, the piston pin body 1 is covered with a wear-resistant layer 11, which improves the component's ability to resist wear and reduces losses during use. The multi-ring groove 12 structure cleverly arranged on the surface of the wear-resistant layer 11 not only increases the surface area and promotes the rapid transfer of heat energy, but also further optimizes the cooling mechanism and ensures the thermal management efficiency during engine operation. The heat-absorbing ring 9 is tightly connected to the wear-resistant layer 11 via a stabilizing block 13 fixed on the inner circumferential surface. This stable connection design enhances the overall mechanical stability of the system and comprehensively improves engine performance.

[0031] For details, please refer to Figure 2 One end of the stabilizing block 13 is provided with a plurality of ventilation holes 14 , and one end of the wear-resistant layer 11 is provided with a plurality of heat dissipation holes 15 .

[0032] In this embodiment, the ventilation holes 14 at the end of the stabilizing block 13 are combined with the heat dissipation holes 15 at the end of the wear-resistant layer 11 to form an innovative airflow channel system. The cooling gas in the ventilation holes 14 directly acts on the contact area between the wear-resistant layer 11 and the heat-absorbing ring 9, while the heat dissipation holes 15 promote the rapid dissipation of heat from the surface of the wear-resistant layer 11 to the external environment, thereby improving the heat dissipation efficiency and thermal stability of the piston pin.

[0033] For details, please refer to Figure 3 One end of the stabilizing block 13 is provided with two through holes 16, one end of the piston pin body 1 is provided with an oil groove 17, one end of the piston pin body 1 is provided with an oil passage 18, and the outer circumferential surface of the piston pin body 1 is provided with an oil outlet 19.

[0034] In this embodiment, ventilation holes 14 are designed at one end of the stabilizing block 13, which cooperate with the heat dissipation holes 15 at the end of the wear-resistant layer 11 to improve the internal heat exchange efficiency. The ventilation holes 14 promote air circulation between the interior of the piston pin and the external environment, help to discharge hot air flow, and reduce heat accumulation. The heat dissipation holes 15 on the wear-resistant layer 11 directly enhance the surface heat dissipation capacity. The synergistic effect of the two not only effectively controls the temperature rise during operation, but also reduces the mechanical stress of the piston pin material caused by thermal expansion and contraction by improving thermal management.

[0035] For details, please refer to Figure 1 One end of the positioning block 8 is fixedly connected to the fixing block 20 , and one end of the fixing block 20 is fixedly connected to the inner circumferential surface of the heat absorption ring 9 .

[0036] In this embodiment, the positioning block 8 is firmly connected to the inner circumferential surface of the heat absorption ring 9 through the fixing block 20, ensuring that the heat absorption ring 9 maintains a precise position during the entire working process, avoiding displacement caused by vibration or high-pressure environment, thereby ensuring the stability of the heat absorption efficiency. The intervention of the fixing block 20 not only strengthens the integration of the heat absorption ring 9 and the overall structure of the piston pin, but also improves the reliability and durability of the device.

[0037] The working principle and usage process of the present invention are as follows: the carefully designed mounting grooves 2 and connecting blocks 3 at both ends of the piston pin body 1 form a strong supporting frame through the sturdy connecting rod 4 and the heat transfer block 6, which not only realizes the precise installation and positioning of the piston pin, but also provides a solid foundation for the effective conduction of heat. The embedded heat absorption ring 9 is close to the inner wall of the piston pin and works in conjunction with the heat transfer block 6 to form a closed loop of efficient heat absorption and transmission, effectively controlling the internal temperature and avoiding the risk of overheating. The addition of the positioning block 8 and the heat dissipation groove 10 not only strengthens the fixation of the heat transfer block 6, but also forms an additional heat dissipation path locally, further consolidating the wear resistance and lubrication aspects of the device and extending the service life of the piston pin.

[0038] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A high-strength piston pin, characterized in that: include: A piston pin body (1) is provided with two mounting grooves (2) at one end of the piston pin body (1), two connecting blocks (3) are fixedly connected to one end of the piston pin body (1), one end of each of the two connecting blocks (3) is fixedly connected to a connecting rod (4), heat release grooves (5) are provided on both sides of the piston pin body (1), one end of each of the two connecting rods (4) is fixedly connected to a heat transfer block (6), one end of the piston pin body (1) is provided with a movable groove (7), one end of each of the two connecting rods (4) is fixedly connected to a positioning block (8), the inner circumferential surface of the piston pin body (1) is fixedly connected to a heat absorbing ring (9), and one end of each of the two positioning blocks (8) is fixedly connected to a heat dissipation groove (10).

2. A high-strength piston pin according to claim 1, characterized in that: The outer surface of the piston pin body (1) is fixedly connected to a wear-resistant layer (11), the surface of the wear-resistant layer (11) is provided with a plurality of annular grooves (12), and the inner circumferential surface of the heat-absorbing ring (9) is fixedly connected to a stabilizing block (13).

3. A high-strength piston pin according to claim 2, characterized in that: One end of the stabilizing block (13) is provided with a plurality of ventilation holes (14).

4. A high-strength piston pin according to claim 3, characterized in that: One end of the wear-resistant layer (11) is provided with a plurality of heat dissipation holes (15).

5. The high-strength piston pin according to claim 4, characterized in that: One end of the stabilizing block (13) is provided with two through holes (16), one end of the piston pin body (1) is provided with an oil groove (17), one end of the piston pin body (1) is provided with an oil passage (18), and the outer circumferential surface of the piston pin body (1) is provided with an oil outlet (19).

6. The high-strength piston pin according to claim 5, characterized in that: One end of the positioning block (8) is fixedly connected to a fixing block (20), and one end of the fixing block (20) is fixedly connected to the inner circumferential surface of the heat absorption ring (9).

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