Piston pin with oil groove

Abstract

The utility model provides a piston pin with an oil groove, which relates to the field of piston pins, and comprises a piston pin main body, the outer wall of the piston pin main body is provided with a groove, the inner side of the groove is connected with an oil seepage hole, the inner side of the oil seepage hole is connected with an oil distribution cavity, the piston pin main body is internally provided with an oil inlet pipe with an integrated structure, and the oil distribution cavity is connected with an oil outlet pipe. A center pipe of an integrated structure is arranged in the middle of the oil inlet pipe, oil outlet holes are formed in the pipe wall of the center pipe, and meanwhile an oil storage cavity is formed between the oil inlet pipe and the oil distribution cavity. The piston pin solves the problems that in the prior art, a piston pin with an oil groove is poor in structural stability, short in service life and poor in lubricating effect.

Description

Technical Field

[0001] The utility model relates to the technical field of piston pins, in particular to a piston pin with an oil groove. Background Art

[0002] The middle part of the piston pin passes through the small end hole of the connecting rod and is used to connect the piston and the connecting rod. Its function is to transmit the gas force borne by the piston to the connecting rod, or to make the small end of the connecting rod drive the piston to move together. After searching, the prior art (application number: CN202120186772.4) records "a piston pin with an oil groove, belonging to the technical field of piston pins. The piston pin with an oil groove includes a piston pin body and an internal tube. The piston pin body is provided with multiple groups of transverse oil injection holes, and the multiple groups of oil injection holes are centrally symmetrically distributed inside the piston pin body. The piston pin body is provided with an oil outlet hole on the outside, and the oil outlet hole is connected to the oil injection hole. The two ends of the internal cavity of the piston pin body are respectively provided with limiting grooves, and the top of the limiting groove is connected to the oil injection hole. A sealing ring is fixedly embedded in the limiting groove, and the internal tube is fixedly arranged inside the piston pin body. During long-term use of the utility model, the lubricating oil inside the oil injection hole gradually flows out from the oil outlet hole, so that the outer wall of the piston pin body is attached with the lubricating oil, the piston pin is more lubricated during use, the wear of the piston pin body and the connecting rod end is reduced, and the service life of the piston pin and the connecting rod end is extended. "

[0003] However, although the piston pin with oil groove in the prior art can form a lubricating oil film on the surface of the piston pin, the piston pin main body structure involved includes an internal tube, a sealing ring and a limit ring. As is well known, the existing piston pin is a hollow tubular structure with an integrated structure. The piston pin main body formed by the connection of the above-mentioned multiple structural components has stability deviation during high-speed operation and is prone to deformation in a long-term high-temperature engine environment, thereby reducing its service life. Secondly, the engine oil enters the oil storage tank through the oil filling hole and the sealing ring. During the high-speed movement of the piston pin, the engine oil in the oil storage tank will also be discharged from the oil filling hole, resulting in the oil amount in the oil storage tank being unable to quickly penetrate and lubricate the surface of the piston pin, resulting in a deviation in the lubrication effect. Utility Model Content

[0004] In order to overcome the defects of the prior art, a piston pin with an oil groove is provided to solve the problems of poor structural stability, short service life and deviation in lubrication effect of the piston pin with an oil groove in the prior art.

[0005] To achieve the above-mentioned purpose, a piston pin with an oil groove is provided, comprising: a piston pin body, the outer wall of the piston pin body is provided with a groove, the inner side of the groove is connected to an oil seepage hole, and the inner side of the oil seepage hole is connected to an oil distribution chamber, an oil inlet pipe of an integral structure is provided inside the piston pin body, a center pipe of an integral structure is provided in the middle of the oil inlet pipe, an oil outlet hole is provided on the wall of the center pipe, and an oil storage chamber is provided between the oil inlet pipe and the oil distribution chamber.

[0006] Furthermore, the grooves are arranged in an annular array along the axial circumferential wall of the piston pin body, and balls are connected to the grooves, and the outer sides of the balls are on the same circumference as the outer wall of the piston pin body.

[0007] Furthermore, the oil distribution chambers are provided with a plurality of groups which are equidistantly opened on the inner wall of the piston pin body, and each oil distribution chamber corresponds to a groove on the outside, and the oil seepage hole is connected between the oil distribution chamber and the groove.

[0008] Furthermore, the oil inlet pipe is symmetrically connected to both ends of the central pipe, and the oil inlet pipe is set as a tapered pipe structure that is wide outside and narrow inside, and both ends of the oil inlet pipe are set as oil inlets, and the oil inlets are flush with the two ends of the piston pin body.

[0009] Furthermore, the oil inlet pipe is configured as an alloy material layer, and a high temperature resistant coating is provided on the surface of the alloy material layer.

[0010] Furthermore, a magnetic frame is embedded inside the oil inlet pipe, and the magnetic frame is made of a permanent magnet material, and two groups of magnetic frames of different sizes are provided in the same oil inlet pipe.

[0011] The beneficial effects of the utility model are:

[0012] 1. When in use, the piston pin body is connected with the cylinder piston and the small end of the connecting rod. During the high-speed operation of the piston, the piston pin body rotates at a small angle and maintains a high reciprocating motion up and down. At this time, the engine oil flows to the center tube through the oil inlet of the oil inlet pipe in a large amount. Then, during the up and down reciprocating motion of the piston pin body, the engine oil in the center tube is inertially squeezed into the oil storage cavity through the oil outlet hole, so that the oil volume in the oil storage cavity increases, and then it is diverted to various grooves through the oil distribution cavity and the oil seepage hole, and then a lubricating oil film is quickly formed on the surface of the piston pin body. At the same time, the engine oil in the oil storage cavity is blocked by the outer wall of the oil inlet pipe, so that a certain amount of oil and oil pressure are maintained inside the oil storage cavity, thereby improving the lubrication effect;

[0013] 2. The integrated structure formed by the oil inlet pipe, the center pipe and the piston pin body allows the piston pin body to maintain good stability during high-speed movement. At the same time, the alloy material layer and the temperature-resistant coating of the oil inlet pipe reduce the mass of the piston pin body while ensuring the strength of the piston pin body and its corrosion resistance and high-temperature resistance, thereby ensuring its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the axial cross-sectional structure of an embodiment of the utility model.

[0015] Figure 2 This is a schematic diagram of the oil inlet pipe and center pipe structure of an embodiment of the utility model.

[0016] Figure 3 It is a side structural schematic diagram of an embodiment of the utility model.

[0017] Figure 4 This is a schematic diagram of the material layer structure of the oil inlet pipe according to an embodiment of the utility model.

[0018] In the figure: 1. piston pin body; 11. groove; 12. ball; 13. oil seepage hole; 14. oil distribution chamber; 15. oil storage chamber; 16. center tube; 161. oil outlet hole; 17. oil inlet pipe; 171. oil inlet; 172. alloy material layer; 173. high temperature resistant coating; 18. magnetic frame. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Reference Figures 1 to 4 As shown, the utility model provides a piston pin with an oil groove, comprising: a piston pin body 1, an outer wall of the piston pin body 1 is provided with a groove 11, and the inner side of the groove 11 is connected to an oil seepage hole 13, and the inner side of the oil seepage hole 13 is connected to an oil separation chamber 14, an integral oil inlet pipe 17 is provided inside the piston pin body 1, and an integral center pipe 16 is provided in the middle of the oil inlet pipe 17, and an oil outlet hole 161 is provided on the tube wall of the center pipe 16, and an oil storage chamber 15 is provided between the oil inlet pipe 17 and the oil separation chamber 14.

[0021] In this embodiment, the groove 11, the oil separation chamber 14 and the oil storage chamber 15 are all the oil groove parts of the piston pin with oil groove involved in this application.

[0022] Specifically, the oil seepage holes 13 are equidistantly opened in the axial direction along the length direction of the groove 11 .

[0023] Specifically, the cross-section of the oil storage chamber 15 is set to a triangular structure, and the outward portion of the oil storage chamber 15 is the base of the triangle, and the oil inlet pipe 17 is the two waists of the triangle. Through the structure of the oil storage chamber 15, it is possible to ensure that the amount of engine oil is poured into the groove 11 when the piston pin body 1 moves.

[0024] Specifically, the oil outlet holes 161 are evenly formed on the outer wall of the central tube 16 , so that a large amount of oil inertialy flows into the oil storage chamber 15 when the oil enters.

[0025] like Figure 1 and Figure 3 As shown, the grooves 11 are opened in a circular array along the axial circumferential wall of the piston pin body 1, and the grooves 11 are connected to the balls 12, and the outer sides of the balls 12 are on the same circumference as the outer wall of the piston pin body 1, and the oil separation chambers 14 are provided with a plurality of groups opened at equal intervals on the inner wall of the piston pin body 1, and each oil separation chamber 14 corresponds to a groove 11 on the outer side, and the oil seepage holes 13 are connected between the oil separation chambers 14 and the grooves 11.

[0026] Specifically, the ball 12 can be fixedly connected or rolled on the inner wall of the groove 11 .

[0027] As a preferred embodiment, by providing the ball 12, when the piston pin body 1 is connected to the piston and the connecting rod, the friction force of the rotating part will not increase due to the opening of the groove 11, so that the ball 12 can fill the rotating connection part. When the ball 12 is in the rolling connection, it can accelerate the lubrication of the engine oil.

[0028] like Figure 2 and Figure 4 As shown, the oil inlet pipe 17 is symmetrically connected to the two ends of the center pipe 16, and the oil inlet pipe 17 is set to a tapered pipe structure that is wide on the outside and narrow on the inside, and the two ends of the oil inlet pipe 17 are set to oil inlets 171, and the oil inlet 171 is flush with the two ends of the piston pin body 1, the oil inlet pipe 17 is set to an alloy material layer 172, and the surface of the alloy material layer 172 is provided with a high-temperature resistant coating 173, a magnetic frame 18 is embedded in the oil inlet pipe 17, and the magnetic frame 18 is set to a permanent magnet material, and two groups of magnetic frames 18 of different sizes are provided in the same oil inlet pipe 17.

[0029] Specifically, the alloy material layer 172 is made of titanium alloy, which has the advantages of high strength, corrosion resistance, high temperature resistance, and light weight.

[0030] As a preferred embodiment, by setting up an oil inlet pipe 17 structure that is wide outside and narrow inside, the amount of oil at the outer port of the oil inlet pipe 17 is large, and thus the oil pressure is high, so that the oil in the oil storage chamber 15 and the center tube 16 is not easy to flow out.

[0031] As a preferred embodiment, by providing a magnetic frame 18, the oil passing near the piston pin body 1 can be adsorbed and cleaned of iron filings by the magnetic frame 18, thereby avoiding blockage of oil holes with smaller apertures such as the oil seepage hole 13 and the oil outlet hole 161, and at the same time facilitating the protection of the piston inside the cylinder body.

[0032] When in use, the piston pin body is connected to the cylinder piston and the small end of the connecting rod. During the high-speed operation of the piston, the piston pin body rotates at a small angle and maintains an up and down reciprocating motion. At this time, the engine oil flows in large quantities to the center tube through the oil inlet of the oil inlet pipe. Then, during the up and down reciprocating motion of the piston pin body, the engine oil in the center tube is inertially squeezed into the oil storage chamber through the oil outlet hole, thereby increasing the oil amount in the oil storage chamber. Then, it is diverted to various grooves through the oil distribution chamber and the oil seepage holes, thereby quickly forming a lubricating oil film on the surface of the piston pin body. At the same time, the engine oil in the oil storage chamber is blocked by the outer wall of the oil inlet pipe, thereby maintaining a certain amount of oil and oil pressure inside the oil storage chamber, thereby improving the lubrication effect.

[0033] The piston pin with oil grooves of the utility model can effectively solve the problems of poor structural stability, short service life and deviation in lubrication effect of the piston pin with oil grooves in the prior art, and realizes oil film lubrication through the opened oil grooves on the basis of the existing piston pin technology with oil grooves, while ensuring the overall structural stability of the piston pin, improving the lubrication efficiency, ensuring the lubrication effect under continuous working conditions, and extending the service life.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A piston pin with an oil groove, comprising: A piston pin body (1) is characterized in that: a groove (11) is formed on the outer wall of the piston pin body (1), and an oil seepage hole (13) is connected to the inner side of the groove (11), and an oil separation chamber (14) is connected to the inner side of the oil seepage hole (13); an integral oil inlet pipe (17) is formed inside the piston pin body (1), and an integral center pipe (16) is formed in the middle of the oil inlet pipe (17), and an oil outlet hole (161) is formed on the wall of the center pipe (16); and an oil storage chamber (15) is formed between the oil inlet pipe (17) and the oil separation chamber (14).

2. A piston pin with an oil groove according to claim 1, characterized in that: The grooves (11) are arranged in an annular array along the axial circumferential wall of the piston pin body (1), and the grooves (11) are connected to balls (12), and the outer sides of the balls (12) are on the same circumference as the outer wall of the piston pin body (1).

3. The piston pin with oil groove according to claim 1, characterized in that: The oil separation chambers (14) are provided with a plurality of groups which are equidistantly opened on the inner wall of the piston pin body (1), and each oil separation chamber (14) corresponds to a groove (11) on the outer side, and the oil seepage hole (13) is connected between the oil separation chamber (14) and the groove (11).

4. The piston pin with oil groove according to claim 1, characterized in that: The oil inlet pipe (17) is symmetrically connected to the two ends of the central pipe (16), and the oil inlet pipe (17) is configured as a tapered pipe structure that is wide on the outside and narrow on the inside, and the two ends of the oil inlet pipe (17) are configured as oil inlets (171), and the oil inlets (171) are flush with the two ends of the piston pin body (1).

5. The piston pin with oil groove according to claim 1, characterized in that: The oil inlet pipe (17) is provided as an alloy material layer (172), and a high temperature resistant coating (173) is provided on the surface of the alloy material layer (172).

6. The piston pin with oil groove according to claim 1, characterized in that: A magnetic frame (18) is embedded inside the oil inlet pipe (17), and the magnetic frame (18) is made of a permanent magnet material. Two groups of magnetic frames (18) of different sizes are provided in the same oil inlet pipe (17).

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