Piston mechanism for combustion chamber of internal combustion engine

Abstract

This utility model discloses a piston mechanism for an internal combustion engine combustion chamber, belonging to the field of internal combustion engine technology. It includes a piston, piston rings fitted around the outside of the piston, a connecting rod installed at the bottom of the piston, and a connecting rod cap installed at the bottom of the connecting rod. Pin holes are symmetrically arranged on both sides of the piston, with a piston pin passing through the inside of each pin hole and passing through the top of the connecting rod. Indicator arrows are evenly distributed on the outer side of the piston top, with an angle of 120° between adjacent indicator arrows and the center of the piston top. This utility model, by evenly distributing indicator arrows in a circular array on the piston top, with an angle of 120° between adjacent indicator arrows and the piston center, can guide the piston ring installation process, ensuring accurate installation of multiple sets of piston rings. Additionally, symmetrically arranged indicator blocks on the piston top indicate the position of the pin holes, preventing the piston ring notches from aligning with that area, thus facilitating the assembly of the piston mechanism.

Description

Technical Field

[0001] This utility model relates to a piston mechanism, and more particularly to a piston mechanism for the combustion chamber of an internal combustion engine, belonging to the field of internal combustion engine technology. Background Technology

[0002] In the prior art, such as the invention with application number 201910742177.1, an internal combustion engine piston mechanism is disclosed. In order to solve the problems of low thermal efficiency, high noise, energy waste and environmental pollution of the current piston mechanism, the piston pin is enlarged by a certain size, and the gap between the piston rings is shortened accordingly. Then this favorable state will be more ideal. The connecting rod small end is thickened so that it does not deform under instantaneous power loading and transmits kinetic energy more quickly. The small gap also has the auxiliary role of transmitting longitudinal waves, reducing the loss of kinetic energy transmission.

[0003] The above-mentioned applications still have shortcomings:

[0004] During the assembly of the piston mechanism, since the piston rings on the three different planes all have openings, there are certain requirements for the installation of the top piston rings. Generally, they are required to be staggered by 120 degrees when installed. In addition, in order to avoid wear on the cylinder at the openings, the openings on the piston rings need to be staggered from the piston pins. However, at present, the piston mechanism cannot determine the installation position or provide installation position indications during the assembly process, which affects the assembly effect.

[0005] To address this issue, a piston mechanism for the combustion chamber of an internal combustion engine was designed. Utility Model Content

[0006] The main purpose of this utility model is to provide a piston mechanism for the combustion chamber of an internal combustion engine. By uniformly arranging indicator arrows in a ring array on the top of the piston, with the angle between adjacent indicator arrows and the piston center being 120 degrees, it can guide the piston ring installation process to ensure the accurate installation of multiple sets of piston rings. In addition, symmetrically arranged indicator blocks on the top of the piston can indicate the position of the pin hole to avoid the notch on the piston ring aligning with that area, making the assembly of the piston mechanism more convenient. By symmetrically arranging guide blocks on both sides of the piston, and the guide blocks being located above the piston shaft end, it can guide the gas inside the cylinder towards the through hole inside the piston pin during the piston's up and down sliding process, accelerating the heat dissipation of the piston pin.

[0007] The objective of this utility model can be achieved by adopting the following technical solution:

[0008] A piston mechanism for an internal combustion engine combustion chamber includes a piston, a piston ring sleeved on the outside of the piston, a connecting rod installed at the bottom of the piston, and a connecting rod cap installed at the bottom of the connecting rod. Pin holes are symmetrically opened on both sides of the piston, and a piston pin is installed through the pin holes. The piston pin passes through the top of the connecting rod. Indicator arrows are evenly distributed on the outer side of the top of the piston, and the angle between adjacent indicator arrows and the center of the top of the piston is 120°.

[0009] Preferably, a prompting block is symmetrically arranged on the top of the piston, and the prompting block is located above the pin hole, with a fixed width of the prompting block being the same as the diameter of the pin hole.

[0010] Preferably, the piston surface is coated with a diamond-like coating.

[0011] Preferably, the piston pin has a through hole inside, and the diameter at the middle position inside the piston pin is smaller than the diameter at both ends of the piston pin.

[0012] Preferably, the outer wall of the through hole is uniformly provided with a flow guide groove along the circumference, and an air hole is provided at the middle position of the inner wall of the piston pin, and the air hole extends to the outer side of the piston pin.

[0013] Preferably, guide blocks are symmetrically arranged on both sides of the piston, and the guide blocks are located above the pin holes.

[0014] The beneficial effects of this utility model are as follows:

[0015] This utility model provides a piston mechanism for the combustion chamber of an internal combustion engine. By uniformly arranging indicator arrows in a ring array on the top of the piston, with the angle between adjacent indicator arrows and the center of the piston being 120 degrees, it can guide the piston ring installation process to ensure the accurate installation of multiple sets of piston rings. In addition, symmetrically arranged indicator blocks on the top of the piston can indicate the position of the pin hole to avoid the notch on the piston ring aligning with that area, making the assembly of the piston mechanism more convenient.

[0016] By symmetrically arranging guide blocks on both sides of the piston, and with the guide blocks located above the piston shaft end, the gas inside the cylinder can be diverted towards the through hole inside the piston pin during the piston's up-and-down sliding process, thus accelerating the heat dissipation of the piston pin. Attached Figure Description

[0017] Figure 1 This is the front view of the present invention;

[0018] Figure 2 This is a schematic diagram of the piston structure of this utility model;

[0019] Figure 3 This is a cross-sectional view of the piston of this utility model;

[0020] Figure 4 This is a cross-sectional view of the piston pin of this utility model.

[0021] In the diagram: 1. Piston; 2. Piston ring; 3. Connecting rod; 4. Connecting rod cap; 5. Pin hole; 6. Piston pin; 7. Indicator block; 8. Indicator arrow; 9. Guide block; 10. Through hole; 11. Guide groove; 12. Air hole. Detailed Implementation

[0022] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0023] like Figures 1-4 As shown, this embodiment provides a piston mechanism for an internal combustion engine combustion chamber, including a piston 1, a piston ring 2 sleeved on the outside of the piston 1, a connecting rod 3 installed at the bottom of the piston 1, and a connecting rod cap 4 installed at the bottom of the connecting rod 3. Pin holes 5 are symmetrically opened on both sides of the piston 1, and a piston pin 6 is installed through the inside of the pin hole 5. The piston pin 6 passes through the top of the connecting rod 3. Indicator arrows 8 are evenly arranged on the outer side of the top of the piston 1, and the angle between adjacent indicator arrows 8 and the center of the top of the piston 1 is 120°.

[0024] Overall working principle: During the assembly of piston ring 2, after piston ring 2 is inserted into the ring groove, the rotation of piston ring 2 is controlled to align the notches of the three sets of piston ring 2 with different indicator arrows 8, so as to avoid the piston ring 2 notches from overlapping and to ensure the accurate installation of piston ring 2.

[0025] In this embodiment, a prompting block 7 is symmetrically arranged on the top of the piston 1, and the prompting block 7 is located above the pin hole 5. The width of the prompting block 7 is the same as the diameter of the pin hole 5.

[0026] Local working principle: During the installation process, even if the piston ring 2 is not aligned with the indicator arrow 8, it is still necessary to observe whether the notch of the piston ring 2 is aligned with the indicator block 7. If it is aligned with the indicator block 7, it needs to be adjusted.

[0027] In this embodiment, the surface of piston 1 is coated with a diamond-like coating.

[0028] Local working principle: The diamond-like carbon coating reduces frictional resistance and increases service life.

[0029] In this embodiment, a through hole 10 is provided inside the piston pin 6, and the diameter at the middle position inside the piston pin 6 is smaller than the diameter at both ends of the piston pin 6.

[0030] Local working principle: By opening a through hole 10 inside the piston pin 6, heat dissipation of the piston pin 6 can be accelerated, and the piston pin 6 is thicker in the middle and relatively thinner at both ends, thus ensuring the strength of the piston pin 6.

[0031] In this embodiment, a guide groove 11 is uniformly provided on the outer wall of the through hole 10 along the circumference, and an air hole 12 is provided at the middle position of the inner wall of the piston pin 6, and the air hole 12 extends to the outer side of the piston pin 6.

[0032] Local working principle: The guide groove 11 on the outer wall of the through hole 10 increases the contact area between the piston pin 6 and the air, improving the heat dissipation effect. In addition, heat can also be conducted through the air hole 12.

[0033] In this embodiment, guide blocks 9 are symmetrically arranged on both sides of the piston 1, and the guide blocks 9 are located above the pin hole 5.

[0034] Local working principle: During the up-and-down movement of piston 1, guide block 9 can guide gas toward the inside of piston pin 6, accelerate air flow, and improve heat dissipation efficiency.

[0035] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A piston mechanism for an internal combustion engine combustion chamber, comprising a piston (1), a piston ring (2) sleeved on the outside of the piston (1), a connecting rod (3) installed at the bottom of the piston (1), and a connecting rod cap (4) installed at the bottom end of the connecting rod (3), characterized in that: The piston (1) has symmetrical pin holes (5) on both sides. A piston pin (6) is installed through the inside of the pin hole (5) and passes through the top of the connecting rod (3). Indicator arrows (8) are evenly arranged on the outer side of the top of the piston (1). The angle between the adjacent indicator arrows (8) and the center of the top of the piston (1) is 120°.

2. The piston mechanism for an internal combustion engine combustion chamber according to claim 1, characterized in that: A prompting block (7) is symmetrically arranged on the top of the piston (1), and the prompting block (7) is located above the pin hole (5). The width of the prompting block (7) is the same as the diameter of the pin hole (5).

3. The piston mechanism for an internal combustion engine combustion chamber according to claim 1, characterized in that: The surface of the piston (1) is coated with a diamond-like coating.

4. A piston mechanism for an internal combustion engine combustion chamber according to claim 1, characterized in that: The piston pin (6) has a through hole (10) inside, and the diameter at the middle position inside the piston pin (6) is smaller than the diameter at both ends of the piston pin (6).

5. A piston mechanism for an internal combustion engine combustion chamber according to claim 4, characterized in that: The outer wall of the through hole (10) is uniformly provided with a guide groove (11) along the circumference, and a vent (12) is provided at the middle position of the inner wall of the piston pin (6), and the vent (12) extends to the outside of the piston pin (6).

6. A piston mechanism for an internal combustion engine combustion chamber according to claim 5, characterized in that: The piston (1) is symmetrically provided with guide blocks (9) on both sides, and the guide blocks (9) are located above the pin hole (5).

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