Connecting rod of piston type air compressor

Abstract

The section of the connecting rod is in a T shape, a groove is formed in the outer surface of the top of the connecting rod, a valve plate is embedded in the groove, a layer of elastic piece is arranged above the valve plate, one end of the elastic piece is attached to the valve plate, and the other end of the elastic piece tilts upwards. A fixing screw is in threaded connection between the attached end of the elastic piece and the valve piece and the connecting rod, the thickness of the valve piece is smaller than that of the elastic piece, the hardness of the valve piece is larger than that of the elastic piece, and a connecting rod piston ring groove is formed in the outer side face of the top of the connecting rod in the circumferential direction and sleeved with a piston ring. A connecting rod air inlet is vertically formed in one side of the top of the connecting rod, the upper end of the connecting rod makes contact with the valve plate, and a bearing groove is formed in the outer surface of the lower end of the connecting rod. The elastic piece is additionally arranged on the valve plate, so that the valve plate can be prevented from deforming and losing efficacy due to opening and closing for a long time; and the assembly form of the valve plate and the elastic sheet is changed into a threaded fastening form, so that the need of replacing the whole connecting rod due to the failure of the valve plate is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressor connecting rods, in particular to a connecting rod of a piston air compressor. Background Art

[0002] After years of development, the air compressor industry in China has now reached a relatively mature stage with a variety of brand models. The domestic products of the same type have become increasingly close to the international well-known brands in terms of production capacity, manufacturing level, product quality, and reliability, and have a relatively high cost performance advantage compared with international brands, with full competition in the market. In addition, with the transfer of the global compressor industry to China and the drive of the export market demand, the output of domestic air compressors in China has also increased rapidly.

[0003] As an important part of the air compressor, the connecting rod converts the output torque of the motor into mechanical energy, thereby realizing reciprocating motion and compressing gas; at present, the valve plates of most connecting rods on the market are assembled by riveting, and this assembly method has a series of problems: the valve plates slip and shift during riveting, and the valve plates warp and deform; after riveting, the plastic deformation of the rivets causes the parts to lack interchangeability function, and the valve plates cannot be replaced normally after abnormal damage, increasing costs. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a connecting rod of a piston air compressor, which uses a threaded fastening method to replace the original valve plate riveting assembly method, and at the same time adds an upper spring plate above the valve plate to play a certain limiting role, which can effectively limit the opening and closing amplitude of the valve plate upwards, avoid the valve plate from deforming and failing due to long-term operation of opening and closing, and affect the air pumping efficiency of the air compressor; and because the assembly form is changed to threaded fastening, the valve plate and the spring plate are detachable, increasing the interchangeability of the parts, and avoiding the embarrassment that the entire connecting rod needs to be replaced due to the failure of the valve plate.

[0005] To solve the above technical problems, the utility model provides the following technical solutions: a connecting rod of a piston air compressor, the cross-section of the connecting rod is T-shaped, a groove is opened on the outer surface of the top of the connecting rod, a valve plate is embedded in the groove, a layer of spring plate is arranged above the valve plate, one end of the spring plate is attached to the valve plate, and the other end is upturned. A fixing screw is threadedly connected between the end of the spring plate and the valve plate that are attached to each other and the connecting rod;

[0006] Further, the thickness of the valve plate is less than the thickness of the spring plate, and the hardness of the valve plate is greater than the hardness of the spring plate;

[0007] Still further, a connecting rod piston ring groove is opened on the outer side surface of the top of the connecting rod along the circumferential direction, and a piston ring is sleeved on the connecting rod piston ring groove;

[0008] Further, a connecting rod air intake hole is vertically opened on one side of the top of the connecting rod. The connecting rod air intake hole is a gas flow hole, the lower end of which communicates with the external environment, and the upper end of which contacts the valve plate.

[0009] Further, a bearing groove is opened on the outer surface of the lower end of the connecting rod, and a bearing is press-fitted and placed in the bearing groove.

[0010] Further, the connecting rod is made of aluminum alloy. The connecting rod is a main structural member and is manufactured by die casting.

[0011] Compared with the prior art, the beneficial effects that the present utility model can achieve are as follows:

[0012] The present device designs a connecting rod for a piston-type air compressor. A shrapnel is added to the valve plate, which can effectively limit the opening and closing amplitude of the valve plate upwards, avoid deformation and failure of the valve plate due to long-term operation of opening and closing, and affect the air pumping efficiency of the air compressor. The assembly form of the valve plate and the shrapnel is changed to screw fastening, making the valve plate and the shrapnel detachable, increasing the interchangeability of parts, avoiding the need to replace the entire connecting rod due to the failure of the valve plate, and reducing the maintenance cost of the air compressor. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is the present utility model Figure 1 enlarged view of the mark 3 in;

[0015] Figure 3 A is a schematic diagram of the connecting rod of the present utility model working downward and the air flow upward;

[0016] Figure 3 B is a schematic diagram of the connecting rod of the present utility model working upward and the air flow downward;

[0017] Wherein: 1, fixing screw; 2, shrapnel; 3, valve plate; 4, connecting rod piston ring groove; 5, connecting rod air intake hole; 6, connecting rod; 7, bearing groove. Detailed Embodiment

[0018] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments. However, the following embodiments are only the preferred embodiments of the present utility model and not all of them. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present utility model. The experimental methods in the following embodiments are all conventional methods unless otherwise specified. The materials, reagents, etc. used in the following embodiments can all be obtained from commercial channels unless otherwise specified.

[0019] Embodiment

[0020] As Figure 1 、 Figure 2 、 Figure 3 shown, the present utility model provides a connecting rod for a piston type air compressor. The cross-section of the connecting rod 6 is T-shaped. A groove is formed on the outer surface of the top of the connecting rod 6. A valve plate 3 is embedded in the groove. A layer of elastic sheet 2 is arranged above the valve plate 3. One end of the elastic sheet 2 is in contact with the valve plate 3, and the other end is upturned. A fixing screw 1 is threadedly connected between the end of the elastic sheet 2 and the valve plate 3 in contact with the connecting rod 6. The thickness of the valve plate 3 is less than that of the elastic sheet 2, and the hardness of the valve plate 3 is greater than that of the elastic sheet 2. A ring of connecting rod piston ring grooves 4 is formed on the outer side surface of the top of the connecting rod 6 in the circumferential direction. A piston ring is sleeved on the connecting rod piston ring grooves 4. A connecting rod air inlet hole 5 is vertically formed on one side inside the top of the connecting rod 6. The connecting rod air inlet hole 5 is a gas flow hole, the lower end of which communicates with the external environment, and the upper end of which is in contact with the valve plate 3. A bearing groove 7 is formed on the outer surface of the lower end of the connecting rod 6. A bearing is press-fitted and placed in the bearing groove 7. The connecting rod 6 is made of aluminum alloy and is a main structural member, which is manufactured by die casting;

[0021] When using this device, the fixing screw 1 mainly plays a role in fixing the elastic sheet 2 and the valve plate 3. Due to the influence of the opening and closing frequency of the valve plate 3, the fixing screw 1 needs to have good pre-tightening force and anti-fatigue characteristics; the elastic sheet 2 has low hardness, good plasticity and toughness, and its main function is to limit the position. For the traditional connecting rod 6 valve plate 3, due to the lack of position limitation and high opening and closing frequency, there are abnormal phenomena such as deformation and warping of the valve plate 3 after a long working time. However, this design can play a good role in position limitation and reduce the risk of valve plate 3 deformation; the valve plate 3 is thinner and harder than the elastic sheet 2 to resist the impact brought by the air flow and avoid plastic deformation; the connecting rod piston ring grooves 4 are mainly used to place the piston ring; the connecting rod air inlet hole 5 is a gas flow hole, and the compressed air of the connecting rod 6 enters from this hole; the connecting rod 6 is a main structural member, which is manufactured by die casting; the bearing groove 7 is mainly used to press-fit and place the bearing;

[0022] The working process principle of the overall piston type air compressor connecting rod 6 is as follows:

[0023] According to Figure 3 A, when the connecting rod 6 works downward, the air flow is upward, and the valve plate 3 is pushed open, and the air flow flows into the cylinder chamber from the connecting rod air inlet hole 5;

[0024] According to Figure 3 B, when the connecting rod 6 works upward, the air flow is downward, the valve plate 3 is closed tightly, and the pressure in the cylinder chamber increases and the air flow is led out of the desiccant cylinder;

[0025] The device designs a connecting rod 6 of a piston air compressor, and adds a shrapnel 2 to the valve plate 3, which can effectively limit the opening and closing amplitude of the valve plate 3 upwards, avoiding the deformation and failure of the valve plate 3 due to long-term operation of opening and closing, and affecting the air pumping efficiency of the air compressor; while the assembly form of the valve plate 3 and the shrapnel 2 is changed to thread fastening, making the valve plate 3 and the shrapnel 2 detachable, increasing the interchangeability of parts, avoiding the need to replace the entire connecting rod 6 due to the failure of the valve plate 3, and reducing the maintenance cost of the air compressor.

[0026] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A connecting rod of a piston-type air compressor, wherein the cross-section of the connecting rod (6) is T-shaped, and is characterized in that: A groove is formed on the outer surface of the top of the connecting rod (6), and a valve plate (3) is embedded in the groove. A layer of elastic sheet (2) is arranged above the valve plate (3). One end of the elastic sheet (2) is in contact with the valve plate (3), and the other end is upturned. A fixing screw (1) is threadedly connected between the end of the elastic sheet (2) in contact with the valve plate (3) and the connecting rod (6).

2. A connecting rod of a piston air compressor according to claim 1, characterized in that: The thickness of the valve plate (3) is less than that of the elastic sheet (2), and the hardness of the valve plate (3) is greater than that of the elastic sheet (2).

3. The connecting rod of a piston-type air compressor according to claim 1, characterized in that: A circle of connecting rod piston ring grooves (4) is formed on the outer side surface of the top of the connecting rod (6) along the circumferential direction, and a piston ring is sleeved on the connecting rod piston ring grooves (4).

4. A connecting rod of a piston air compressor according to claim 1, characterized in that: A connecting rod air inlet hole (5) is vertically formed on one side inside the top of the connecting rod (6). The connecting rod air inlet hole (5) is a gas flow hole, the lower end of which is communicated with the external environment, and the upper end of which is in contact with the valve plate (3).

5. A connecting rod of a piston-type air compressor according to claim 1, wherein: A bearing groove (7) is formed on the outer surface of the lower end of the connecting rod (6), and a bearing is press-fitted and placed in the bearing groove (7).

6. The connecting rod of a piston-type air compressor according to claim 1, characterized in that: The connecting rod (6) is made of aluminum alloy.

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