Noise reduction piston pin

Abstract

The utility model provides a noise reduction piston pin, which belongs to the technical field of piston pins and comprises a piston pin body. The two mounting grooves are formed in the circumferential surface of the piston pin body; the multiple silencing holes are formed in the circumferential surface of the piston pin body; the multiple matching grooves are formed in the circumferential surface of the piston pin body, and the annular noise reduction blocks embedded into the two mounting grooves in the piston pin body can effectively absorb impact vibration energy generated in the reciprocating motion of a piston and convert the impact vibration energy into heat energy or energy in other forms to be dissipated, so that pneumatic noise generated when the piston runs is reduced, and the service life of the piston is prolonged. The noise generated when the piston pin is used in cooperation with a piston is reduced, noise pollution to the external working environment is avoided, meanwhile, damage caused by friction easily generated in the piston in the using process is avoided, and the service life of the piston pin is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of piston pins, and particularly relates to a noise-reducing piston pin. Background Art

[0002] The piston pin is an important part in an internal combustion engine. It connects the piston and the connecting rod, enabling the reciprocating motion of the piston in the cylinder to be converted into the rotational motion of the connecting rod, and then the power is output through the crankshaft. The piston pin is usually cylindrical, installed in the pin hole of the piston, and has grooves or holes at both ends for installing the bearings of the connecting rod.

[0003] The patent with the publication number of "CN209430299U" records a piston pin of an engine, belonging to the technical field of engine accessories. It solves the problem of low structural strength of the existing piston pin. The piston pin of this engine includes a piston pin body, an annular cylinder is arranged in the piston pin body, and two symmetrically arranged limiting ring sleeves are also arranged in the piston pin body. The inner diameters of the two limiting ring sleeves are both larger than the inner diameter of the annular cylinder. The inner end faces of the two limiting ring sleeves are respectively attached to the corresponding end faces of the annular cylinder, and the outer end faces of the two limiting ring sleeves are respectively flush with the corresponding end faces of the piston pin body. Two symmetrically arranged limiting pins are arranged on the outer peripheral walls of the piston pin body at the positions of the two limiting ring sleeves. The ends of the limiting pins penetrating into the piston pin body continue to extend axially inward and penetrate into the corresponding limiting ring sleeves, and the ends of the limiting pins penetrating into the corresponding limiting ring sleeves do not penetrate out of the inner peripheral walls of the limiting ring sleeves. The utility model has the advantages of high structural strength and structural stability.

[0004] The above patent has the advantages of high structural strength and structural stability, but the piston pin in the above patent has a relatively large noise when used in cooperation with the piston, resulting in noise pollution to the external working environment. At the same time, it is easy to cause friction and damage to the inside of the piston during use, reducing the service life of the piston pin. Content of the Utility Model

[0005] The purpose of the utility model is to provide a noise-reducing piston pin, aiming to solve the problems that the piston pin in the existing technology has a relatively large noise when used in cooperation with the piston, resulting in noise pollution to the external working environment, and it is easy to cause friction and damage to the inside of the piston during use, reducing the service life of the piston pin.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A noise-reducing piston pin, comprising:

[0008] A piston pin body;

[0009] Two installation grooves, both of which are opened on the circumferential surface of the piston pin body;

[0010] A plurality of sound absorption holes, and the plurality of sound absorption holes are all formed on the circumferential surface of the piston pin body;

[0011] A plurality of fitting grooves, and the plurality of fitting grooves are all formed on the circumferential surface of the piston pin body.

[0012] As a preferred solution of the present utility model, annular noise reduction blocks are provided on the inner surfaces of the two mounting grooves.

[0013] As a preferred solution of the present utility model, wear-resistant blocks are provided on the inner surfaces of the plurality of fitting grooves.

[0014] As a preferred solution of the present utility model, the inner surface of the piston pin body is conical.

[0015] As a preferred solution of the present utility model, the outer surfaces of the plurality of wear-resistant blocks match the inner surfaces of the plurality of fitting grooves.

[0016] As a preferred solution of the present utility model, the outer surfaces of the two annular noise reduction blocks are circular.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. In this solution, the annular noise reduction blocks embedded in the two mounting grooves on the piston pin body can effectively absorb the impact vibration energy generated during the reciprocating motion of the piston, convert it into heat energy or other forms of energy and dissipate it, significantly reducing the mechanical noise during the operation of the engine. The wear-resistant blocks installed in the plurality of fitting grooves are precisely matched with the inner surfaces of the grooves, reducing the direct contact between the piston pin and the cylinder wall or the connecting rod, thereby significantly reducing wear, extending the service life of the piston pin and the internal parts of the engine, reducing the maintenance cost. The plurality of sound absorption holes provided are beneficial to gas flow, reducing the pneumatic noise during the operation of the piston, and also contributing to the heat dissipation inside the piston pin, improving the working stability and service life, reducing the noise generated when the piston pin is used in cooperation with the piston, solving the problem of noise pollution to the external working environment, and at the same time avoiding the easy friction damage to the inside of the piston during use, and improving the service life of the piston pin.

[0019] 2. In this solution, by making the inside of the piston pin body conical, better assembly accuracy and sealing performance are ensured, reducing oil leakage and gas leakage in the combustion chamber, and improving fuel efficiency. Description of the Drawings

[0020] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0021] Figure 1This is a perspective view of the utility model.

[0022] Figure 2 This is the first three-dimensional sectional view of the utility model.

[0023] Figure 3 This is the second three-dimensional sectional view of the utility model.

[0024] Figure 4 This is the third three-dimensional sectional view of the utility model.

[0025] In the figure: 1. Piston pin body; 2. Installation groove; 3. Annular noise reduction block; 4. Sound absorption hole; 5. Fitting groove; 6. Wear-resistant block. Specific implementation mode

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0027] Embodiment 1

[0028] Please refer to Figures 1-4 , the present utility model provides the following technical solutions:

[0029] A noise reduction piston pin, comprising:

[0030] Piston pin body 1;

[0031] Two installation grooves 2, both of which are opened on the circumferential surface of the piston pin body 1;

[0032] Multiple sound absorption holes 4, all of which are opened on the circumferential surface of the piston pin body 1;

[0033] Multiple fitting grooves 5, all of which are opened on the circumferential surface of the piston pin body 1.

[0034] In a specific embodiment of the present utility model, the piston pin body 1 is made of a high-strength and wear-resistant alloy material, which is the main structure of the entire piston pin. Its interior is designed to be conical to ensure a tight fit between the piston and the connecting rod, reducing noise and oil leakage caused by gaps. Two are symmetrically distributed on the circumferential surface of the piston pin body 1. According to the inner surfaces of the multiple installation grooves 2 opened, they are specifically designed to embed the annular noise reduction blocks 3 to absorb and disperse the vibration energy generated during piston movement, thereby reducing noise. Through the multiple sound absorption holes 4 opened and scattered on the circumferential surface of the piston pin body 1, these holes are conducive to gas flow, reducing the pneumatic noise during piston operation, and also contributing to the heat dissipation inside the piston pin, improving the working stability and service life. At the same time, multiple fitting grooves 5 are distributed on the circumferential surface of the piston pin body 1 for installing the anti-wear blocks 6 to reduce the direct friction between the piston pin and the cylinder wall or the connecting rod pin seat, reducing wear, extending the service life and further reducing noise. The two annular noise reduction blocks 3 are installed in the installation grooves 2, and their circular ring design increases the contact area with the piston pin body 1, more effectively absorbing vibration and reducing noise transmission. The anti-wear blocks 6 are built into the multiple fitting grooves 5, and their outer surfaces are precisely matched with the inner surfaces of the fitting grooves 5 to ensure a tight fit, further reducing friction, enhancing wear resistance, reducing the noise when the piston pin is used in cooperation with the piston, solving the problem of noise pollution to the external working environment, and at the same time avoiding easy friction damage to the inside of the piston during use, and improving the service life of the piston pin.

[0035] For details, please refer to Figure 1 The inner surfaces of the two installation grooves 2 are both provided with annular noise reduction blocks 3.

[0036] In this embodiment: According to the inner surfaces of the multiple installation grooves 2 opened, they are specifically designed to embed the annular noise reduction blocks 3 to absorb and disperse the vibration energy generated during piston movement, thereby reducing noise.

[0037] For details, please refer to Figure 1 The inner surfaces of the multiple fitting grooves 5 are all provided with anti-wear blocks 6.

[0038] In this embodiment: Through the multiple fitting grooves 5 distributed on the circumferential surface of the piston pin body 1 for installing the anti-wear blocks 6 to reduce the direct friction between the piston pin and the cylinder wall or the connecting rod pin seat, reducing wear, extending the service life and further reducing noise.

[0039] For details, please refer to Figure 2 The inner surface of the piston pin body 1 is conical.

[0040] In this embodiment: By the inner part of the piston pin body 1 being conical, better assembly accuracy and sealing performance are ensured, reducing oil leakage and gas leakage in the combustion chamber, and improving fuel efficiency.

[0041] For details, please refer to Figure 4 , the outer surfaces of the multiple anti-wear blocks 6 match the inner surfaces of the multiple mating grooves 5.

[0042] In this embodiment: The anti-wear block 6 is built into the multiple mating grooves 5, and its outer surface precisely matches the inner surface of the mating groove 5 to ensure a tight fit, further reducing friction and enhancing wear resistance.

[0043] For details, please refer to Figure 1 , the outer surfaces of the two annular noise reduction blocks 3 are annular.

[0044] In this embodiment: By setting the surfaces of the two annular noise reduction blocks 3 to be annular, it has the effect of reducing vibration and noise on the circumferential surface of the piston pin.

[0045] The working principle and usage process of the present utility model: The two mounting grooves 2 on the piston pin body 1 house the annular noise reduction blocks 3. During the reciprocating movement of the piston, the annular noise reduction blocks 3 can absorb and disperse the high-frequency vibration energy generated by the contact between the piston and the pin hole wall, converting it into heat energy, thereby significantly reducing the noise caused by vibration. The annular design increases the contact area, distributes the stress more evenly, and improves the noise reduction efficiency. The design of the anti-wear block 6 in the mating groove 5 closely fits with the inner wall of the pin hole, reducing the friction between the piston pin and the cylinder wall directly, and reducing the wear rate. The outer surface of the anti-wear block 6 precisely matches the inner surface of the mating groove 5, ensuring good wear resistance and sliding performance, and extending the service life of the piston pin. The conical design of the inner surface of the piston pin body 1 makes the piston pin form a tighter fit with the piston pin boss during installation, reducing the clearance. This not only improves the sealing performance, avoids oil leakage, but also reduces the knocking sound caused by the clearance, further assisting in noise reduction. The conical design also helps to improve the lubrication efficiency, ensuring that the piston pin is fully lubricated during high-speed operation. Through the comprehensive application of the above structures, when the piston pin is operating in the engine, it not only reduces the noise caused by mechanical vibration, improves the smoothness of the engine, but also reduces the direct wear between components through the wear-resistant design, extending the service life of the internal components of the engine. At the same time, the cooperation between the conical design and the anti-wear block 6 optimizes the installation and working environment of the piston pin, improving the overall working efficiency and reliability.

[0046] Finally, it should be noted that: The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A noise-reducing piston pin, characterized in that: include: Piston pin body (1); Two mounting grooves (2), both of which are formed on the circumferential surface of the piston pin body (1); A plurality of silencer holes (4), wherein the plurality of silencer holes (4) are all provided on the circumferential surface of the piston pin body (1); A plurality of matching grooves (5) are provided, and the plurality of matching grooves (5) are all arranged on the circumferential surface of the piston pin body (1).

2. A noise reduction piston pin according to claim 1, characterized in that: The inner surfaces of the two installation grooves (2) are both provided with an annular noise reduction block (3).

3. A noise reduction piston pin according to claim 2, characterized in that: The inner surfaces of the plurality of matching grooves (5) are each provided with an anti-wear block (6).

4. A noise reduction piston pin according to claim 3, characterized in that: The inner surface of the piston pin body (1) is in a cone shape.

5. A noise-reducing piston pin according to claim 4, characterized in that: The outer surfaces of the plurality of anti-wear blocks (6) match the inner surfaces of the plurality of matching grooves (5).

6. A noise-reducing piston pin according to claim 5, characterized in that: The outer surfaces of the two annular noise reduction blocks (3) are in the shape of circular rings.

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