A self-lubricating connecting rod bushing

Abstract

The present application provides a self-lubricating connecting rod bushing, which relates to the field of bushings. It includes a bushing body that is pressed into a ring shape from a straight strip, the bushing body includes a first side and a second side that are butted against each other, a first positioning protrusion is provided at the end of the first side, and a pair of first positioning grooves are provided at the end of the second side, the first positioning protrusion is pressed into the first positioning groove, and the first positioning protrusion and the first positioning groove are interference fit. The present application has the effect of improving the structural strength of the bushing body after molding.

Description

Technical Field

[0001] The present application relates to the field of bushings, and in particular to a self-lubricating connecting rod bushing. Background Art

[0002] The bushing is a matching part used on the outside of mechanical parts to achieve sealing, wear protection and other functions. It is a ring sleeve that acts as a liner. After the bushing is produced, it is usually necessary to polish the surface of the bushing.

[0003] The bushing is generally formed by rolling and pressing a straight strip of raw material plate. That is, under the action of the rolling machine, the head and tail of the raw material plate are pressed against each other, so that the raw material plate is pressed into a cylindrical shape. In the actual pressing process, in order to ensure that the raw material plate is pressed into a cylindrical shape, the head and tail ends of the raw material plate are usually cut into two straight edges parallel to each other. However, such a pressing structure is prone to the phenomenon that the head and tail ends are not completely pressed, resulting in a low structural strength of the bushing. Utility Model Content

[0004] In order to improve the problem of low structural strength of the bushing after molding, the present application provides a self-lubricating connecting rod bushing.

[0005] The present application provides a self-lubricating connecting rod bushing, which adopts the following technical solution:

[0006] A self-lubricating connecting rod bushing includes a bushing body pressed into a ring shape from a straight strip, the bushing body includes a first side and a second side that are butted against each other, a first positioning protrusion is provided at the end of the first side, and a pair of first positioning grooves are provided at the end of the second side, the first positioning protrusion is pressed into the first positioning groove, and the first positioning protrusion and the first positioning groove are in an interference fit.

[0007] By adopting the above technical solution, during the rolling operation, the first side edge and the second side edge will be in a docking state, and during the docking process, the first positioning protrusion will be pressed into the first positioning groove, so that the first positioning protrusion is in an interference fit state with the first positioning groove, so that the first side edge and the second side edge will form a mutual bite, thereby improving the connection strength between the first side edge and the second side edge, and thereby improving the structural strength of the bushing body.

[0008] Optionally, a pair of first positioning protrusions are spaced apart along the length direction of the first side, a pair of first positioning grooves are spaced apart along the length direction of the second side, one first positioning protrusion is arranged in one first positioning groove, and another first positioning protrusion is arranged in another first positioning groove.

[0009] By adopting the above technical solution, a first positioning protrusion and a first positioning groove form a positioning group, and two positioning groups are provided in a bushing body. The two positioning groups are arranged at intervals, thereby improving the positioning effect of the first side edge and the second side edge, and ensuring that the first side edge and the second side edge can be reliably connected.

[0010] Optionally, a second positioning groove is formed between the outer edge of the first positioning protrusion and the first side, a second positioning protrusion is formed between the outer edge of the first positioning groove and the second side, the second positioning protrusion is pressed into the second positioning groove, and the second positioning protrusion and the second positioning groove are interference fit.

[0011] By adopting the above technical solution, during the process of pressing the first positioning protrusion and the first positioning groove, the second positioning protrusion and the second positioning groove will also be pressed together, further improving the overall structural strength of the bushing.

[0012] Optionally, a second positioning groove is provided on both sides of the first positioning protrusion, and the second positioning protrusion in the second positioning groove presses the first positioning protrusion.

[0013] By adopting the above technical solution, the two second positioning protrusions will form a clamping effect on a first positioning protrusion, thereby ensuring that the first positioning protrusion can be reliably and tightly combined with the first positioning groove, and also improving the stability of the connection transition between the first side and the second side, and improving the overall strength of the bushing body.

[0014] Optionally, the first positioning protrusion and the first side edge are an integrally formed structure, and the second positioning protrusion and the second side edge are an integrally formed structure.

[0015] By adopting the above technical solution, after the first positioning protrusion is matched with the first positioning groove, and after the second positioning protrusion is matched with the second positioning groove, the first side edge and the second side edge can be tightly combined without loosening.

[0016] Optionally, a pair of U-shaped oil grooves are provided on the inner wall of the bushing body, and the openings of the pair of oil grooves are arranged opposite to each other. An oil hole is also provided on the outer wall of the bushing body, and the oil hole is located on the outside of the oil groove. The oil hole is used to transport lubricating oil to the inner side of the bushing body, and the oil groove is used to store the lubricating oil.

[0017] By adopting the above technical solution, lubricating oil can be transported to the inner side of the bushing body through the oil hole, ensuring that the connecting rod can maintain lubrication with the inner wall of the bushing body after being inserted into the bushing body. At the same time, excess lubricating oil can enter the oil tank for storage, thereby improving the continuity of the lubrication effect.

[0018] Optionally, a plurality of accommodating holes are provided on the inner wall of the bushing body, and the plurality of accommodating holes are located on the inner side of the oil groove and are spaced apart along the extension direction of the oil groove. A graphite column is provided in the accommodating hole, and the top of the graphite column is flush with the top of the accommodating hole.

[0019] By adopting the above technical solution, the friction between the graphite column and the connecting rod will form powdered graphite, and the powdered graphite will adhere to the surface of the connecting rod, thereby further improving the lubrication effect.

[0020] Optionally, the accommodating hole is in an inverted convex shape with a larger upper portion and a smaller lower portion, the lower portion of the graphite column is bonded to the lower portion of the accommodating hole by glue, and there is a gap between the upper portion of the graphite column and the upper portion of the accommodating hole; the oil groove and the gap are connected by an oil delivery channel, the depth of one end of the oil delivery channel connected to the oil groove on the bushing body is less than the depth of one end of the oil delivery channel connected to the gap on the bushing body, and the oil delivery channel is filled with cotton yarn, and the cotton yarn is used to absorb and transport the lubricating oil.

[0021] By adopting the above technical solution, glue is used to fix the lower part of the graphite column, and the lubricating oil in the oil groove will be transported to the gap through the cotton yarn, so that the lubricating oil will be absorbed and stored on the outer side of the upper part of the graphite column, thereby improving the lubrication effect and significantly reducing the friction between the connecting rod and the bushing body.

[0022] In summary, this application has the following beneficial effects:

[0023] 1. Through the cooperation between the first positioning protrusion and the first positioning groove and the cooperation between the second positioning protrusion and the second positioning groove, it is ensured that the first side and the second side can be tightly connected, and the transition between the first side and the second side is smoother, which reduces the friction between the bushing body and the connecting rod inserted into the bushing body and improves the structural strength of the bushing body.

[0024] 2. An oil groove and a graphite column are provided on the inner side of the bushing body. The lubricating oil is injected into the bushing body through the oil hole and stored in the oil groove, so that the bushing and the connecting rod are lubricated by the lubricating oil. Furthermore, there will be friction between the graphite column and the connecting rod and powdered graphite will be produced, and the powdered graphite can further improve the lubrication effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the present application. Figure 1 ;

[0026] Figure 2 It is a schematic diagram of the present application. Figure 2 ;

[0027] Figure 3 yes Figure 1A schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 4 is a radial cross-sectional schematic diagram of the present application;

[0029] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0030] In the figure: 1, bushing body; 11, first side; 111, first positioning protrusion; 112, second positioning groove; 12, second side; 121, first positioning groove; 122, second positioning protrusion; 13, oil groove; 14, oil hole; 15, accommodating hole; 151, gap; 152, oil delivery channel; 16, graphite column. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-5 This application is described in further detail.

[0032] Figure 1 It is a schematic diagram of the present application. Figure 1 , Figure 2 It is a schematic diagram of the present application. Figure 2 See also Figure 1 and Figure 2 A self-lubricating connecting rod bushing includes a bushing body 1. The bushing body 1 is formed by rolling a straight strip of raw material by a rolling machine. The bushing body 1 includes a first side 11 and a second side 12. After the rolling machine is rolled, the first side 11 and the second side 12 will be butted against each other, so that the bushing body 1 can be ring-shaped.

[0033] Figure 3 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle. Figure 3 Combined with Figure 1 Two first positioning protrusions 111 are provided at the end of the first side 11, and the two first positioning protrusions 111 are arranged at intervals along the length direction of the first side 11. The first positioning protrusion 111 and the first side 11 are an integrated structure, and since the first positioning protrusion 111 protrudes to the outside of the first side 11, a second positioning groove 112 can be provided at the junction of the first positioning protrusion 111 and the first side 11, and a second positioning groove 112 is provided on both sides of each first positioning protrusion 111.

[0034] See also Figure 1 and Figure 3Two first positioning grooves 121 are provided at the end of the second side 12, and the two first positioning grooves 121 are spaced apart along the length direction of the second side 12. A second positioning protrusion 122 is provided on both sides of the notch of the first positioning groove 121, that is, the second positioning protrusion 122 protrudes to the outside of the notch of the first positioning groove 121, and further, the second positioning protrusion 122 and the second side 12 are an integrally formed structure.

[0035] See also Figure 2 and Figure 3 When the bushing body 1 is rolled and formed on the rolling machine, since the two first positioning protrusions 111 and the two first positioning grooves 121 are both arranged at intervals, one first positioning protrusion 111 will be pressed into one first positioning groove 121, and the other first positioning protrusion 111 will be pressed into the other first positioning groove 121. In this way, an interference fit will be formed between the first positioning protrusion 111 and the first positioning groove 121, so that the first side 11 and the second side 12 can be reliably connected, thereby improving the structural strength of the bushing body 1, and also improving the smoothness of the transition between the first side 11 and the second side 12, thereby preventing the connecting rod from generating excessive friction with the bushing body 1 after being inserted into the bushing body 1. Furthermore, a first positioning protrusion 111 and a first positioning groove 121 that cooperate with each other form a positioning group, so that the two first positioning protrusions 111 and the two first positioning grooves 121 can form two positioning groups, thereby effectively improving the structural strength of the bushing body 1.

[0036] When the first positioning protrusion 111 and the first positioning groove 121 complete the interference fit, the second positioning protrusion 122 and the second positioning groove 112 also complete the interference fit. In this way, under the clamping action of the two second positioning protrusions 122, the connection strength between the first positioning protrusion 111 and the first positioning groove 121 can be significantly improved, thereby preventing the first side 11 and the second side 12 from separating from each other during use.

[0037] Figure 4 is a radial cross-sectional schematic diagram of the present application. Figure 4 Combined with Figure 2A pair of U-shaped oil grooves 13 and an oil hole 14 are provided on the inner wall of the bushing body 1. The opening of one oil groove 13 faces the opening of the other oil groove 13. The oil hole 14 penetrates the bushing body 1 and is located outside the oil groove 13. When the connecting rod is inserted into the bushing body 1, the outer wall of the connecting rod fits the inner wall of the bushing body 1, and there is a distance between the outer wall of the connecting rod body and the inner wall of the oil groove 13. In this way, when the lubricating oil is transported into the bushing body 1 through the oil hole 14, the lubricating oil can realize reliable lubrication between the connecting rod and the bushing body 1. At the same time, the excess lubricating oil will enter the oil groove 13, thereby realizing the storage of the lubricating oil, ensuring that the connecting rod can continuously adhere to the lubricating oil from the oil groove 13 during the rotation process, thereby ensuring the continuity of the lubrication effect and preventing the excessive friction between the connecting rod and the bushing body 1 from causing abnormal wear.

[0038] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure at B in the figure. Figure 5 , a plurality of accommodating holes 15 are also provided on the inner wall of the bushing body 1, and the plurality of accommodating holes 15 are located inside the U-shaped oil groove 13, and the plurality of accommodating holes 15 are arranged at intervals along the extension direction of the oil groove 13. The accommodating hole 15 is in the shape of an inverted convex letter with a large upper portion and a small lower portion. At the same time, a graphite column 16 is provided in the accommodating hole 15, and the lower portion of the graphite column 16 is bonded to the lower portion of the accommodating hole 15 by glue, thereby ensuring that the graphite column 16 can be reliably fixed in the accommodating hole 15, and there is a gap 151 between the upper portion of the graphite column 16 and the upper portion of the accommodating hole 15, and the top of the graphite column 16 is flush with the top of the accommodating hole 15. When the connecting rod is inserted and rotated in the bushing body 1, the lubricating oil can achieve a lubricating effect, and at the same time, there will be friction between the outer wall of the connecting rod and the outer wall of the graphite column 16, thereby generating graphite powder, which will adhere to the outer wall of the connecting rod, so that the lubricating effect can also be achieved by the graphite powder.

[0039] See also Figure 5 An oil delivery channel 152 is provided between the oil groove 13 and the gap 151. The depth of the end of the oil delivery channel 152 communicating with the oil groove 13 on the bushing body 1 is less than the depth of the end of the oil delivery channel 152 communicating with the gap 151 on the bushing body 1. That is to say, there is a height difference between the two ends of the oil delivery channel 152, so that the lubricating oil in the oil groove 13 can be transported to the gap 151 and fill the gap 151. In this way, the diffusion area and diffusion effect of the lubricating oil are expanded, the lubrication effect between the connecting rod and the bushing body 1 is further improved, and the wear of the connecting rod and the bushing body 1 is reduced. At the same time, cotton yarn is filled in the oil delivery channel 152, and the cotton yarn can absorb the lubricating oil, so as to achieve the slow and continuous delivery of the lubricating oil and extend the action time of the lubricating oil.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A self-lubricating connecting rod bushing, characterized in that: The invention comprises a bushing body (1) which is pressed into a ring shape from a straight strip, wherein the bushing body (1) comprises a first side (11) and a second side (12) which are butted against each other, a first positioning protrusion (111) is provided at the end of the first side (11), and a pair of first positioning grooves (121) are provided at the end of the second side (12), the first positioning protrusion (111) is pressed into the first positioning groove (121), and the first positioning protrusion (111) and the first positioning groove (121) are in interference fit.

2. A self-lubricating connecting rod bushing according to claim 1, characterized in that: A pair of first positioning protrusions (111) are arranged at intervals along the length direction of the first side (11), and a pair of first positioning grooves (121) are arranged at intervals along the length direction of the second side (12), one first positioning protrusion (111) is arranged in one first positioning groove (121), and another first positioning protrusion (111) is arranged in another first positioning groove (121).

3. The self-lubricating connecting rod bushing according to claim 1, characterized in that: A second positioning groove (112) is formed between the outer edge of the first positioning protrusion (111) and the first side edge (11), and a second positioning protrusion (122) is formed between the outer edge of the first positioning groove (121) and the second side edge (12). The second positioning protrusion (122) is pressed into the second positioning groove (112), and an interference fit is formed between the second positioning protrusion (122) and the second positioning groove (112).

4. A self-lubricating connecting rod bushing according to claim 3, characterized in that: A second positioning groove (112) is provided on both sides of the first positioning protrusion (111), and a second positioning protrusion (122) in the second positioning groove (112) presses the first positioning protrusion (111).

5. A self-lubricating connecting rod bushing according to claim 4, characterized in that: The first positioning protrusion (111) and the first side edge (11) are an integrally formed structure, and the second positioning protrusion (122) and the second side edge (12) are an integrally formed structure.

6. The self-lubricating connecting rod bushing according to claim 1, characterized in that: A pair of U-shaped oil grooves (13) are provided on the inner wall of the bushing body (1), and the openings of the pair of oil grooves (13) are arranged opposite to each other. An oil hole (14) is also provided on the outer wall of the bushing body (1), and the oil hole (14) is located on the outside of the oil groove (13). The oil hole (14) is used to transport lubricating oil to the inside of the bushing body (1), and the oil groove (13) is used to store the lubricating oil.

7. A self-lubricating connecting rod bushing according to claim 6, characterized in that: A plurality of accommodating holes (15) are also provided on the inner wall of the bushing body (1), and the plurality of accommodating holes (15) are located on the inner side of the oil groove (13) and are arranged at intervals along the extension direction of the oil groove (13). A graphite column (16) is provided in the accommodating hole (15), and the top of the graphite column (16) is flush with the top of the accommodating hole (15).

8. The self-lubricating connecting rod bushing according to claim 7, characterized in that: The receiving hole (15) is in the shape of an inverted convex letter with a larger upper portion and a smaller lower portion, the lower portion of the graphite column (16) is bonded to the lower portion of the receiving hole (15) by glue, and a gap (151) exists between the upper portion of the graphite column (16) and the upper portion of the receiving hole (15); The oil groove (13) and the gap (151) are connected via an oil delivery channel (152); the depth of one end of the oil delivery channel (152) connected to the oil groove (13) on the bushing body (1) is less than the depth of one end of the oil delivery channel (152) connected to the gap (151) on the bushing body (1); the oil delivery channel (152) is filled with cotton yarn, which is used to absorb and transport the lubricating oil.

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