Non-metal connecting rod structure of miniature oil-free air compressor

Abstract

A nonmetal connecting rod structure of a miniature oil-free air compressor comprises a connecting rod big end and a connecting rod body, a hollow groove is formed in the connecting area of the connecting rod big end and the connecting rod body, a sliding block is embedded in the hollow groove, and the surface of one end of the sliding block can be matched with the inner side surface, cut by the hollow groove, of the connecting rod big end. The side surfaces of the sliding blocks are matched and contacted with the inner surfaces of the hollow grooves; the sliding block slides in the direction of the center line of the connecting rod under limiting of the hollow groove. An elastic element installation space is arranged between the hollow groove and the connecting rod body, an elastic element is installed in the elastic element installation space, and the elastic element pushes the sliding block to one side of the large end of the connecting rod. The elastic element is used for pushing the sliding block to one side of the large end of the connecting rod in the direction of the center line of the connecting rod, after the connecting rod deforms, as the elastic force of the elastic element is larger than the maximum connecting rod force, it can be ensured that the large end of the connecting rod is tightly contacted and matched with a connecting part installed in the connecting rod in the working process, and vibration and abrasion of the compressor are reduced.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical design, processing and manufacturing, and particularly relates to a non-metallic connecting rod structure of a miniature oil-free air compressor. Background Art

[0002] Miniature oil-free air compressors, such as air suspension compressors and oxygen enrichment compressors, generally use rocking piston compressors, whose connecting rod and piston are an integral structure. The connecting rod of the rocking piston compressor is currently manufactured in one piece, and can only be made of the same material as a whole. In order to reduce the inertial force generated by the swinging motion of the connecting rod, non-metallic materials are currently mainly used. However, after the compressor has been running for a long time, due to the influence of high ambient temperature and the complexity of the force, the non-metallic material will produce a large deformation, especially the large end of the connecting rod. This will cause the movement of the rocking piston compressor to be unbalanced, and the movement trajectory of the piston will be offset, which will in turn aggravate the vibration and wear of the compressor, seriously reducing the life of the compressor and compression leakage. In addition, the installation space of the connecting rod of the rocking piston compressor is relatively small, and there will be problems with the inconvenience of installation for the one-piece molded connecting rod. Utility Model Content

[0003] The purpose of the utility model is to address the deformation problem of non-metallic connecting rods used in the above-mentioned prior art and provide a non-metallic connecting rod structure for a micro oil-free air compressor, thereby enhancing the reliability of the connecting rod components and reducing the vibration and wear of the compressor.

[0004] In order to achieve the above purpose, the utility model has the following technical solutions:

[0005] A non-metallic connecting rod structure for a miniature oil-free air compressor includes a connecting rod big end and a connecting rod body. A hollow groove is provided in the area where the connecting rod big end and the connecting rod body are connected. A slider is embedded in the hollow groove, and one end surface of the slider can match and supplement the inner surface of the connecting rod big end that is cut off by the hollow groove. The side surface of the slider is in contact with the inner surface of the hollow groove. The slider can slide along the direction of the connecting rod center line under the limitation of the hollow groove. An elastic element installation space is provided between the hollow groove and the connecting rod body. An elastic element is installed in the elastic element installation space, and the elastic element can push the slider toward one side of the connecting rod big end.

[0006] As a preferred solution, the inner surface of the connecting rod big end is connected to the bearing or crankshaft, and the hollow groove cuts off a part of the space of the connecting rod body and a part of the connecting rod big end from the area connected to the connecting rod body to the inner surface.

[0007] As a preferred solution, the slider adopts a stepped or columnar shape, and the shape of the hollow groove matches the slider.

[0008] As a preferred solution, a first spring groove is provided on the connecting rod body, a second spring groove is provided on the slider, the elastic element is a spring sheet or a spring bar, and the spring sheet or spring bar is inserted into and installed on the first spring groove and the second spring groove, and the spring force provided by the spring sheet or spring bar pushes the slider toward the big end of the connecting rod; under the action of the elastic force, one end surface of the slider always maintains close contact with the connecting component installed inside the big end of the connecting rod.

[0009] As a preferred solution, after the spring sheet or spring strip is installed in the first spring slot and the second spring slot, the portion of the spring sheet or spring strip outside the connecting rod body is bent to prevent the spring sheet or spring strip from falling off.

[0010] As a preferred solution, the elastic element adopts a spring, which is built into the hollow groove, and the spring force after compression is used to push the slider toward the big end of the connecting rod; under the action of the elastic force, one end surface of the slider always maintains close contact with the connecting component installed inside the big end of the connecting rod.

[0011] As a preferred solution, the elastic force of the elastic element after being installed is calculated and selected according to the following formula:

[0012]

[0013] Where, Ft It is the spring force in the compressed state after the elastic element is installed in the elastic element installation space. is a real number greater than or equal to 1; Fp The connecting rod is subjected to the maximum connecting rod force and is calculated according to the working principle of the reciprocating compressor.

[0014] As a preferred solution, the connecting rod big end and the connecting rod body are made of non-metallic materials, the slider is made of metal or non-metallic materials, and the elastic element is made of metal or a composite material of metal and non-metal.

[0015] As a preferred solution, the other end of the connecting rod body that is not connected to the connecting rod big end is connected to the rocking piston.

[0016] A method for designing a non-metallic connecting rod structure for a micro oil-free air compressor, comprising:

[0017] A hollow groove is provided in the area where the connecting rod big end and the connecting rod body are connected;

[0018] A slider is embedded in the hollow groove, one end surface of the slider is processed to match and complement the inner surface of the connecting rod big end cut off by the hollow groove, and the other end of the slider is supported by an elastic element;

[0019] After the elastic element is compressed, a connecting component is installed inside the big end of the connecting rod. Under the elastic force of the elastic element, the slider slides along the center line of the connecting rod. The elastic force is greater than the maximum connecting rod force, so that one end surface of the slider always maintains close contact with the connecting component installed inside the big end of the connecting rod.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] In response to the deformation problem of non-metallic connecting rods in micro oil-free air compressors, the present invention opens a hollow groove in the area where the connecting rod big end and the connecting rod body are connected and installs a slider. The slider is pushed toward the side of the connecting rod big end along the center line of the connecting rod by an elastic element. After the connecting rod is deformed, because the elastic force of the elastic element is greater than the maximum connecting rod force, it can ensure that the connecting rod big end and the connecting parts installed inside it are in close contact and fit during operation without generating any gaps, thereby avoiding unbalanced movement of the rocking piston compressor, reducing vibration and wear of the compressor, and enhancing the reliability of the connecting rod parts. The non-metallic connecting rod structure of the present invention is cleverly designed, does not require large-scale changes to the existing micro oil-free air compressor connecting rod structure, and has flexible and diverse settings. It effectively solves the deformation problem of the non-metallic connecting rod, effectively reduces compression leakage, and increases the life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings that constitute part of this application are used to provide a further understanding of the technical solution of this application. The schematic embodiments of this application and their descriptions are only used to explain this application and do not constitute an improper limitation on the scope of protection of this application.

[0023] Figure 1 A schematic structural diagram of a first embodiment of the present invention in which the elastic element adopts a spring sheet or a spring strip;

[0024] Figure 2 A schematic structural diagram of a second embodiment of the present invention in which the elastic element adopts a spring;

[0025] In the accompanying drawings: 1-connecting rod big end; 2-connecting rod body; 3-rocking piston; 4-slider; 5-inner surface; 6-first spring groove; 7-second spring groove; 8-elastic element; 9-inner boundary; 10-connecting rod center line; 11-hollow groove; 12-spring. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] It should be noted that in the description of the embodiments of the present invention, the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0028] In the description of this utility model, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; they can refer to direct connection or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0029] The present embodiment of the utility model proposes a non-metallic connecting rod structure for a miniature oil-free air compressor. This structure aims to address the problem of non-metallic connecting rod deformation. Miniature oil-free air compressors, particularly rocking piston compressors, are widely used in fields such as air suspension systems and oxygen enrichment. However, the connecting rod of a rocking piston compressor is currently manufactured as a single piece, using only a single material. Although non-metallic materials (such as plastic and rubber) can effectively reduce the inertial force of the connecting rod's swing, these materials are susceptible to deformation, especially at the connecting rod's large end, under prolonged exposure to high temperatures and complex stresses. This can seriously affect the compressor's stability and lifespan. Furthermore, the installation space for the connecting rod of a rocking piston compressor is limited, and since only a single material can be used, it is difficult to meet the varying material performance requirements of different connecting rod parts. The present embodiment of the utility model aims to avoid unbalanced movement in a rocking piston compressor by reducing vibration and wear in the compressor and thereby enhancing the reliability of the connecting rod component.

[0030] Example 1

[0031] See also Figure 1The non-metallic connecting rod structure of the micro oil-free air compressor of the present invention embodiment includes a connecting rod big end 1 and a connecting rod shaft 2. A hollow groove 11 is provided in the area where the connecting rod big end 1 and the connecting rod shaft 2 are connected. A slider 4 is embedded and installed in the hollow groove 11, and one end surface of the slider 4 can match and supplement the inner surface 5 of the connecting rod big end 1 that is cut off by the hollow groove, and coincide with the contour of the inner boundary 9. The side surface of the slider 4 is in mating contact with the inner surface of the hollow groove 11. The slider 4 can slide along the direction of the connecting rod centerline 10 under the limitation of the hollow groove 11. An elastic element installation space is provided between the hollow groove 11 and the connecting rod shaft 2. An elastic element 8 is installed in the elastic element installation space. The elastic element 8 can push the slider 4 to one side of the connecting rod big end 1. The inner surface 5 of the connecting rod big end 1 is connected to a bearing or a crankshaft. The hollow groove 11 cuts off a portion of the space of the connecting rod shaft 2 and the connecting rod big end 1 extends from the area connected to the connecting rod shaft 2 to a portion of the inner surface 5. The other end of the connecting rod shaft 2, not connected to the connecting rod big end 1, is connected to the rocking piston 3. The cross-section of the connecting rod shaft 2 perpendicular to the connecting rod centerline 10 can be cylindrical, square, or any other shape. In this embodiment, the slider 4 has a stepped or cylindrical shape, with the hollow groove 11 shaped to match the slider 4. The cross-section of the slider 4 in a plane perpendicular to the connecting rod centerline 10 can be circular or square, or other shapes. All surfaces parallel to the connecting rod centerline 10 are partially or fully in contact with the inner surface of the hollow groove 11. In this embodiment, the connecting rod shaft 2 is provided with a first spring groove 6, and the slider 4 is provided with a second spring groove 7. The elastic element 8 is a spring leaf or spring bar. The spring leaf or spring bar extends into and is installed in the first and second spring grooves 6 and 7. The spring leaf or spring bar provides a spring force that pushes the slider 4 toward the connecting rod big end 1. This elastic force ensures that one end surface of the slider 4 always maintains close contact with the connecting component mounted within the connecting rod big end 1. Furthermore, after the spring sheet or spring strip is installed into the first spring slot 6 and the second spring slot 7 , the portion of the spring sheet or spring strip outside the connecting rod body 2 is bent to prevent the spring sheet or spring strip from detaching.

[0032] In this embodiment, the elastic force of the elastic element 8 after installation is calculated and selected according to the following formula:

[0033]

[0034] Where, Ft is the spring force in the compressed state after the elastic element 8 is installed in the elastic element installation space, is a real number greater than or equal to 1; Fp The connecting rod is subjected to the maximum connecting rod force and is calculated according to the working principle of the reciprocating compressor.

[0035] In this embodiment, the connecting rod big end 1 and the connecting rod body 2 are made of non-metallic materials; the slider 4 is made of metal or non-metallic materials; the spring leaf or spring bar is made of metal material or a composite material of metal and non-metal.

[0036] The non-metallic connecting rod structure of the embodiment of the utility model can ensure that the big end of the connecting rod is in close contact with the crankshaft or the bearing without generating any gap after the connecting rod is deformed, thereby meeting the reliability and vibration reduction requirements of the compressor.

[0037] Example 2

[0038] See also Figure 2 The non-metallic connecting rod structure of the micro oil-free air compressor of the present invention embodiment includes a connecting rod big end 1 and a connecting rod shaft 2. A hollow groove 11 is provided in the area where the connecting rod big end 1 and the connecting rod shaft 2 are connected. A slider 4 is embedded and installed in the hollow groove 11, and one end surface of the slider 4 can match and supplement the inner surface 5 of the connecting rod big end 1 that is cut off by the hollow groove, and coincide with the contour of the inner boundary 9. The side surface of the slider 4 is in mating contact with the inner surface of the hollow groove 11. The slider 4 can slide along the direction of the connecting rod centerline 10 under the limitation of the hollow groove 11. An elastic element installation space is provided between the hollow groove 11 and the connecting rod shaft 2. An elastic element 8 is installed in the elastic element installation space. The elastic element 8 can push the slider 4 to one side of the connecting rod big end 1. The inner surface 5 of the connecting rod big end 1 is connected to a bearing or a crankshaft. The hollow groove 11 cuts off a portion of the space of the connecting rod shaft 2 and the connecting rod big end 1 extends from the area connected to the connecting rod shaft 2 to a portion of the inner surface 5. The other end of the connecting rod body 2 that is not connected to the connecting rod big end 1 is connected to the rocking piston 3. The cross section of the connecting rod body 2 perpendicular to the connecting rod center line 10 can be cylindrical, square or other shapes. The slider 4 of this embodiment adopts a stepped or columnar shape, and the shape of the hollow groove 11 matches the slider 4. The cross section of the slider 4 in the plane perpendicular to the connecting rod center line 10 is circular or square, or can be other shapes, and all of its surfaces parallel to the connecting rod center line 10 are partially or completely in contact with the inner surface of the hollow groove 11. The elastic element 8 of this embodiment adopts a spring 12, and the spring 12 is built into the hollow groove 11. The spring force after the spring 12 is compressed is used to push the slider 4 in the direction of the connecting rod big end 1; under the action of the elastic force, one end surface of the slider 4 always maintains close contact with the connecting component installed inside the connecting rod big end 1.

[0039] In this embodiment, the elastic force of the elastic element 8 after installation is calculated and selected according to the following formula:

[0040]

[0041] Where, Ft is the spring force in the compressed state after the elastic element 8 is installed in the elastic element installation space, is a real number greater than or equal to 1; Fp The connecting rod is subjected to the maximum connecting rod force and is calculated according to the working principle of the reciprocating compressor.

[0042] In this embodiment, the connecting rod big end 1 and the connecting rod body 2 are made of non-metallic materials; the slider 4 is made of metal or non-metallic materials; and the elastic element 8 is made of metal or a composite material of metal and non-metal.

[0043] The non-metallic connecting rod structure of the embodiment of the utility model can ensure that the big end of the connecting rod is in close contact with the crankshaft or the bearing after the connecting rod is deformed without generating any gap, thereby meeting the reliability and vibration reduction requirements of the compressor.

[0044] The non-metallic connecting rod structure of the miniature oil-free air compressor of the utility model embodiment is designed according to the following method:

[0045] A hollow groove 11 is provided in the area where the connecting rod big end 1 and the connecting rod body 2 are connected;

[0046] A slider 4 is embedded in the hollow groove 11. One end surface of the slider 4 is machined to match and complement the inner surface 5 of the connecting rod big end 1 removed by the hollow groove 11, and to coincide with the contour of the inner boundary 9. The other end of the slider 4 is supported by the elastic element 8.

[0047] After elastic element 8 is compressed, a connecting component is installed inside connecting rod big end 1. Under the elastic force of elastic element 8, slider 4 slides along connecting rod centerline 10. The elastic force is greater than the maximum connecting rod force, ensuring that one end surface of slider 4 always maintains close contact with the connecting component installed inside connecting rod big end 1 without any gap. This prevents unbalanced movement of the rocking piston compressor, reduces vibration and wear of the compressor, and enhances the reliability of the connecting rod component.

[0048] like Figure 1 and Figure 2As shown, the non-metallic connecting rod structure of the micro oil-free air compressor proposed in the embodiment of the present invention is as follows: when the rocking piston compressor is in the suction state, the connecting rod moves to the left, and the crank or bearing contacts the left side of the inner surface 5 of the connecting rod big end 1. Under the action of the elastic force, the slider 4 contacts the right side of the crank or bearing. When the rocking piston compressor is in the compression and exhaust state, the connecting rod moves to the right, and the crank or bearing contacts the right side of the inner surface 5 of the connecting rod big end 1, that is, the surface of the slider 4. Because the elastic force is greater than the maximum connecting rod force, the elastic element 8 pushes the crank or bearing to contact the left side of the inner surface 5 of the connecting rod big end 1. It can be seen that during the operation of the compressor, there is always no gap between the left and right sides of the crank or bearing. Under the action of the elastic force, the slider 4 in the connecting rod big end 1 is in close contact with the crankshaft or bearing, avoiding the formation of gaps and ensuring stable operation. The elastic force can be generated by the spring 12 or other elastic element 8. By initially setting the elastic element 8 parameters such as stiffness and length, the elastic force can be greater than or equal to the maximum connecting rod force during the operation of the compressor. For the sake of convenience, the above-mentioned descriptions of directions such as "left", "right", and "inside" are only based on the directions drawn in the accompanying drawings and do not constitute any limitation on the specific structure of this application.

[0049] In combination with the technical solution proposed in this application, from the perspective of avoiding unbalanced movement of the rocking piston compressor, the reliability of the connecting rod component can be enhanced by reducing the vibration and wear of the compressor. The following measures can be further taken:

[0050] (1) Reduce compressor vibration

[0051] Regularly perform maintenance and care on the compressor, including cleaning, lubrication and tightening of connections, to reduce friction and wear and reduce the possibility of vibration.

[0052] Dynamic balancing is performed on the rotating parts of the compressor to eliminate imbalance by adding compensating mass or adjusting the position of the rotating parts, thereby reducing vibration.

[0053] Install vibration-damping pads, vibration-damping feet or vibration-damping brackets to absorb vibration energy and reduce vibration transmission and impact.

[0054] Use vibration monitoring instruments to perform regular or continuous vibration monitoring of the compressor. By analyzing the vibration data, abnormal vibration patterns can be detected and fault diagnosis can be performed. Maintenance measures can be taken in a timely manner to reduce the occurrence of vibration problems.

[0055] (2) Reduce compressor wear

[0056] Check the lubrication and wear of the bearings regularly, and replace the bearings in time as needed to prevent vibration caused by bearing wear.

[0057] Use wear-resistant materials to manufacture key components such as connecting rods and pistons to improve their wear resistance.

[0058] Optimize the design, reduce the fit clearance, and reduce impact and wear.

[0059] Ensure the normal operation of the compressor lubrication system, regularly replace high-quality lubricating oil, and maintain good lubrication status to reduce friction and wear.

[0060] (3) Enhance the reliability of connecting rod components

[0061] Strict quality control is carried out on connecting rod components, including material selection, processing accuracy and heat treatment, to ensure that they meet the design requirements.

[0062] Regularly check the wear and deformation of the connecting rod parts and replace the severely worn parts in time. Perform necessary maintenance and care on the connecting rod parts, such as cleaning, lubrication and tightening.

[0063] Adopt more advanced connecting rod design, such as optimizing the shape and size of the connecting rod to improve its strength and rigidity. Use more wear-resistant connecting rod materials, such as high-alloy steel or composite materials.

[0064] By taking these measures, the vibration and wear of the rocking piston compressor can be effectively reduced, thereby enhancing the reliability of the connecting rod component. This will help improve the operating efficiency and stability of the compressor and extend its service life.

[0065] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all variations that fall within the meaning and range of equivalents of the claims be encompassed within the present invention, and any reference signs in the claims should not be considered as limiting the scope of protection.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A non-metallic connecting rod structure for a micro oil-free air compressor, characterized in that: The invention comprises a connecting rod big end (1) and a connecting rod body (2), wherein a hollow groove (11) is provided in the area where the connecting rod big end (1) and the connecting rod body (2) are connected, a slider (4) is embedded in the hollow groove (11), and one end surface of the slider (4) can match and supplement the inner surface (5) of the connecting rod big end (1) cut off by the hollow groove, and the side surface of the slider (4) is in contact with the inner surface of the hollow groove (11); the slider (4) can slide along the direction of the connecting rod center line (10) under the limitation of the hollow groove (11); an elastic element installation space is provided between the hollow groove (11) and the connecting rod body (2), and an elastic element (8) is installed in the elastic element installation space, and the elastic element (8) can push the slider (4) toward one side of the connecting rod big end (1).

2. The non-metallic connecting rod structure of the micro oil-free air compressor according to claim 1 is characterized in that: The inner surface (5) of the connecting rod big end (1) is connected to a bearing or a crankshaft, and the hollow groove (11) cuts off a portion of the space of the connecting rod shaft (2) and a portion of the connecting rod big end (1) extending from the area connected to the connecting rod shaft (2) to the inner surface (5).

3. The non-metallic connecting rod structure of the micro oil-free air compressor according to claim 1 or 2, characterized in that: The slider (4) has a stepped or columnar shape, and the shape of the hollow groove (11) matches that of the slider (4).

4. The non-metallic connecting rod structure of the micro oil-free air compressor according to claim 1 is characterized in that: The connecting rod body (2) is provided with a first spring groove (6), the slider (4) is provided with a second spring groove (7), the elastic element (8) is a spring sheet or a spring bar, and the spring sheet or spring bar is inserted into and installed in the first spring groove (6) and the second spring groove (7), and the spring sheet or spring bar provides a spring force to push the slider (4) in the direction of the connecting rod big end (1); under the action of the elastic force, one end surface of the slider (4) always maintains close contact with the connecting component installed inside the connecting rod big end (1).

5. The non-metallic connecting rod structure of the micro oil-free air compressor according to claim 4 is characterized in that: After the spring sheet or spring strip is installed in the first spring slot (6) and the second spring slot (7), the portion of the spring sheet or spring strip outside the connecting rod body (2) is bent to prevent the spring sheet or spring strip from falling off.

6. The non-metallic connecting rod structure of the micro oil-free air compressor according to claim 1 is characterized in that: The elastic element (8) is a spring (12), which is built into the hollow groove (11). The spring force after the spring (12) is compressed is used to push the slider (4) in the direction of the connecting rod big end (1); under the action of the elastic force, one end surface of the slider (4) always maintains close contact with the connecting component installed inside the connecting rod big end (1).

7. The non-metallic connecting rod structure of the micro oil-free air compressor according to claim 1 is characterized in that: The elastic force of the elastic element (8) after being installed is calculated and selected according to the following formula: Where, Ft is the spring force in the compressed state after the elastic element (8) is installed in the elastic element installation space, is a real number greater than or equal to 1; Fp The connecting rod is subjected to the maximum connecting rod force and is calculated according to the working principle of the reciprocating compressor.

8. The non-metallic connecting rod structure of the micro oil-free air compressor according to claim 1 is characterized in that: The connecting rod big end (1) and the connecting rod body (2) are made of non-metallic materials, the slider (4) is made of metal or non-metallic materials, and the elastic element (8) is made of metal or a composite material of metal and non-metal.

9. The non-metallic connecting rod structure of the micro oil-free air compressor according to claim 1, characterized in that: The other end of the connecting rod body (2) not connected to the connecting rod big end (1) is connected to the rocking piston (3).

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