A piston rod that is easy to maintain

Abstract

The utility model relates to internal -combustion engine technical field, and specifically is a piston rod convenient to maintain, including piston roof and connecting assembly, the outside bottom of piston roof is fixed with support rod, the bottom of support rod is provided with the pin seat, the connecting assembly is located at the junction of support rod and pin seat, the inside of connecting assembly includes sealing mechanism and limiting mechanism, and limiting mechanism and sealing mechanism's mutual cooperation use. The utility model discloses through the use of connecting assembly and sealing mechanism, makes when the piston in long -term use, its inside skirt layer and ring groove layer can directly dismantle and change when appearing ageing and deformation, changes according to the piston work intensity's difference simultaneously, installs different number's skirt layer and ring groove layer, adjusts its sealing property flexibly, further increases the flexibility of device.

Description

Technical Field

[0001] This utility model relates to the field of internal combustion engine technology, specifically a piston rod that is easy to maintain. Background Technology

[0002] Pistons are core components in thermodynamic machinery such as internal combustion engines and compressors. Their function is to convert the pressure energy of combustion gases into mechanical energy to drive the machinery. They are generally composed of piston tops, piston heads, piston skirts, etc. They convert thermal energy into mechanical energy through reciprocating motion and are widely used in automobile engines, generator sets, compressors and other fields.

[0003] In the process of using existing pistons, the skirt mainly bears some lateral forces. Over a long period of use, scratches or grooves will appear, or even deformation may occur. In this case, the piston cannot be used normally, affecting the normal operation of the internal combustion engine, and may even lead to damage to the internal combustion engine. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] Given the aforementioned or existing technologies, in the process of using existing pistons, the skirt mainly bears some lateral forces. Over a long period of use, scratches or grooves may appear, or even deformation may occur. In this case, the piston cannot be used normally, affecting the normal operation of the internal combustion engine, and may even lead to damage to the internal combustion engine.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A piston rod that is easy to maintain includes a piston top plate; a support rod is fixedly connected to the bottom outer side of the piston top plate; and a pin seat is provided at the bottom of the support rod.

[0008] A connecting assembly is located at the connection between the support rod and the pin seat. The connecting assembly includes a sealing mechanism and a limiting mechanism, which work together.

[0009] As a further embodiment of this utility model: the connecting assembly includes a threaded cylinder; the threaded cylinder is located at one end inside the pin seat; a limiting groove is formed on the outside of the pin seat near the threaded cylinder; a threaded post is fixedly connected to the bottom of the support rod; and a threaded limiting pin is threadedly connected inside the support rod.

[0010] As a further embodiment of this utility model: the sealing mechanism includes multiple skirt layers; an annular groove layer is fixedly connected to the top of the skirt layer; the annular groove layer slides on the outside of the support rod.

[0011] As a further embodiment of this utility model: the limiting mechanism includes a limiting strip; the limiting strip is located outside the support rod; a limiting groove is formed inside the skirt layer; the limiting strip slides inside the limiting groove.

[0012] As a further improvement of this utility model, an oil leakage hole is provided inside the annular groove layer.

[0013] As a further improvement of this utility model, a reinforcing layer is provided on the top outer side of the piston top plate.

[0014] As a further improvement of this utility model, the outer side of the skirt layer is provided with rounded corners.

[0015] As a further improvement of this invention, the skirt layer and the annular groove layer are provided with a molybdenum disulfide coating.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. By using connecting components and sealing mechanisms, this utility model allows the skirt layer and annular groove layer inside the piston to be directly disassembled and replaced when they age and deform during long-term use. At the same time, different numbers of skirt layers and annular groove layers can be installed according to the different working intensity of the piston, flexibly adjusting its sealing performance and further increasing the flexibility of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a piston rod that is easy to maintain.

[0019] Figure 2 A schematic diagram of a piston top plate structure in a piston rod that is easy to maintain;

[0020] Figure 3 This is a schematic diagram of a pin seat structure in a piston rod that is easy to maintain.

[0021] Figure 4 A schematic diagram of a limiting strip structure in a piston rod that is easy to maintain;

[0022] Figure 5 A schematic diagram of an annular groove layer structure in a piston rod that is easy to maintain;

[0023] In the diagram: 1. Piston top plate; 2. Support rod; 3. Pin seat; 4. Threaded cylinder; 5. Threaded column; 6. Limiting groove; 7. Threaded limiting pin; 8. Limiting strip; 9. Skirt layer; 10. Ring groove layer; 11. Limiting slide; 12. Oil leakage hole; 13. Reinforcing layer. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0027] Example 1

[0028] Please see Figures 1 to 5 This is the first embodiment of the present invention. This embodiment provides a piston rod that is easy to maintain, including a piston top plate 1; a support rod 2 is fixedly connected to the bottom outer side of the piston top plate 1; and a pin seat 3 is provided at the bottom of the support rod 2.

[0029] The connecting assembly is located at the connection between the support rod 2 and the pin seat 3. The connecting assembly includes a sealing mechanism and a limiting mechanism, which work together.

[0030] The connecting assembly includes a threaded cylinder 4; the threaded cylinder 4 is located at one end inside the pin seat 3; a limiting groove 6 is formed on the outer side of the pin seat 3 near the threaded cylinder 4; a threaded post 5 is fixedly connected to the bottom of the support rod 2; a threaded limiting pin 7 is threadedly connected inside the support rod 2; the sealing mechanism includes multiple skirt layers 9; an annular groove layer 10 is fixedly connected to the top of the skirt layer 9; the annular groove layer 10 slides on the outer side of the support rod 2; the limiting mechanism includes a limiting strip 8; the limiting strip 8 is located on the outer side of the support rod 2; a limiting slide groove 11 is formed inside the skirt layer 9; the limiting strip 8 slides inside the limiting slide groove 11.

[0031] During operation, the piston top plate 1 and the support rod 2 are integrally machined. When the piston is working, the top of the piston top plate 1 bears huge air pressure to push or move. Therefore, the integral molding of the piston top plate 1 and the support rod 2 makes it more stable and reliable during sliding. Then, the skirt layer 9 and the annular groove layer 10 are fitted onto the outer wall of the support rod 2. Multiple layers can be fitted as needed to form multiple sets of annular grooves and piston rings. The more piston rings, the better the sealing performance. Generally, if three sets of piston rings are improved to four sets of piston rings, the sealing performance is improved by 30%, the axial oil film distribution is more uniform, the pressure gradient is reduced by 15% to 20%, the oil temperature of the matching system drops by 3-5℃, and the pressure on each set of piston rings is also smaller, effectively alleviating metal fatigue and further increasing its stability during operation.

[0032] When the piston top plate 1 and the annular groove layer 10 slide into the outer wall of the support rod 2, the mutual cooperation of the limiting strip 8 and the limiting groove 11 keeps them stable on the surface of the support rod 2. Then, the pin seat 3 is rotated so that the threaded cylinder 4 and the threaded column 5 cooperate to connect the pin seat 3 and the support rod 2. At the same time, the top of the pin seat 3 presses against the skirt layer 9 to fix the pin seat 3. Then, the threaded limiting pin 7 is passed through the limiting groove 6 and the support rod 2 to fix it again. During the piston's operation, most of the strong thrust generated by the gas expansion is borne by the piston top plate 1, and the skirt layer 9 mainly bears the lateral force. Therefore, through the mutual cooperation of the threaded cylinder 4, the threaded column 5, the limiting groove 6, and the threaded limiting pin 7, a stable connection between the pin seat 3 and the support rod 2 can be achieved. At the same time, when the skirt layer 9 and the annular groove layer 10 deform or age during long-term use, they can be directly repaired and replaced.

[0033] By using connecting components and sealing mechanisms, the skirt layer 9 and annular groove layer 10 inside the piston can be directly disassembled and replaced when they age and deform during long-term use. At the same time, different numbers of skirt layers 9 and annular groove layers 10 can be installed according to different piston working intensity, flexibly adjusting their sealing performance and further increasing the flexibility of the device.

[0034] Example 2

[0035] Please see Figures 2 to 5 This is the second embodiment of the present invention, which provides an improved design for a piston rod that is easy to maintain.

[0036] Specifically, the annular groove layer 10 has an oil leakage hole 12 inside, the piston top plate 1 has a reinforcing layer 13 on the top of the outer side, the skirt layer 9 has a rounded corner on the outer side, and the skirt layer 9 and the annular groove layer 10 have a molybdenum disulfide coating on their surfaces.

[0037] During operation, the oil leakage holes 12 inside the annular groove layer 10 are located in the non-core pressure-bearing area inside the annular groove layer 10, so they will not affect the daily use of the annular groove layer 10. At the same time, the oil leakage holes 12 reduce the overall weight of the annular groove layer 10 and store a certain amount of lubricating oil inside it. While reducing mechanical inertia, it can reduce frictional power consumption, reduce energy waste, and reduce oil consumption. Meanwhile, a reinforcing layer 13 is opened on the top of the piston top plate 1. The reinforcing layer 13 is located on the top of the piston top plate 1 and is in direct contact with the rapidly expanding gas. It is made of ceramic matrix composite material, which has a low coefficient of thermal expansion and excellent thermal and shock resistance. The rounded corners on the outer side of the skirt layer 9 can reduce the concentration of internal stress and prevent cracks. The molybdenum disulfide coating on the surface of the skirt layer 9 and the annular groove layer 10 can provide a certain self-lubricating effect during the sliding process of the skirt layer 9 and the annular groove layer 10, further reducing their coefficient of friction and improving the service life of the skirt layer 9 and the annular groove layer 10.

[0038] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0039] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0040] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A piston rod for ease of maintenance, characterized in that: Includes a piston top plate (1); a support rod (2) is fixedly connected to the bottom outer side of the piston top plate (1); a pin seat (3) is provided at the bottom of the support rod (2); The connecting component is located at the connection between the support rod (2) and the pin seat (3). The connecting component includes a sealing mechanism and a limiting mechanism, which work together.

2. A maintenance-friendly piston rod according to claim 1, characterized in that: The connecting assembly includes a threaded cylinder (4); the threaded cylinder (4) is located at one end inside the pin seat (3); a limiting groove (6) is opened on the outside of the pin seat (3) near the threaded cylinder (4); a threaded column (5) is fixedly connected to the bottom of the support rod (2); and a threaded limiting pin (7) is threadedly connected inside the support rod (2).

3. A maintenance-friendly piston rod according to claim 2, characterized in that: The sealing mechanism includes multiple skirt layers (9); an annular groove layer (10) is fixed to the top of the skirt layer (9); the annular groove layer (10) slides on the outside of the support rod (2).

4. A maintenance-friendly piston rod according to claim 3, characterized in that: The limiting mechanism includes a limiting strip (8); the limiting strip (8) is located outside the support rod (2); a limiting groove (11) is opened inside the skirt layer (9); the limiting strip (8) slides inside the limiting groove (11).

5. A maintenance-friendly piston rod in accordance with claim 3, characterized in that: The annular groove layer (10) has an oil leakage hole (12) inside.

6. A maintenance-friendly piston rod according to claim 1, characterized in that: A reinforcing layer (13) is provided on the top outer side of the piston top plate (1).

7. A maintenance-friendly piston rod in accordance with claim 3, characterized in that: The outer side of the skirt layer (9) is provided with rounded corners.

8. A maintenance-friendly piston rod in accordance with claim 3, characterized in that: The skirt layer (9) and the annular groove layer (10) are coated with molybdenum disulfide.

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