Self-lubricating long rod spherical bearing

Abstract

The invention discloses a self-lubricating long rod joint bearing, and its technical scheme is as follows: it comprises an externally threaded rod end joint bearing, an internally threaded rod end joint bearing is arranged on one side of the externally threaded rod end joint bearing, one end of the internally threaded rod end joint bearing extends into the interior of the externally threaded rod end joint bearing and is connected with the externally threaded rod end joint bearing through a thread, a nut is arranged on the outside of the internally threaded rod end joint bearing through a threaded sleeve, a locking washer is arranged on one side of the nut, the locking washer is sleeved on the outside of the internally threaded rod end joint bearing, the other side of the internally threaded rod end joint bearing contacts with the externally threaded rod end joint bearing, and an outer ring is fixedly arranged on one side of the externally threaded rod end joint bearing and the internally threaded rod end joint bearing. The beneficial effects of the invention are as follows: the friction coefficient between the self-lubricating layer and the inner ring of the self-lubricating long rod joint bearing is reduced, the friction temperature is low, the friction loss is reduced, the self-lubricating bearing has excellent wear resistance and self-lubrication, and at the same time, it also has a high load-bearing capacity and is suitable for working under high temperature working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of long rod joint bearings, and in particular to a self-lubricating long rod joint bearing. Background Art

[0002] Spherical bearings are spherical sliding bearings. The basic type consists of inner and outer rings with spherical sliding contact surfaces. Spherical bearings are mainly composed of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface. They can withstand large loads. Depending on their different types and structures, they can withstand radial loads, axial loads, or combined radial and axial loads. Since the outer spherical surface of the inner ring is inlaid with composite materials, the bearing can produce self-lubrication during operation. It is generally used for low-speed swinging motion, and can also make tilting motion within a certain angle range. When the non-concentricity between the supporting shaft and the shaft housing hole is large, it can still work normally.

[0003] The materials of the inner and outer rings of existing self-lubricating long-rod spherical bearings are mainly bearing steel, which causes serious friction and wear on the self-lubricating layer during operation. The failure of self-lubricating spherical bearings is mainly due to the wear of the lining layer, which reduces the life of the self-lubricating bearings. Summary of the invention

[0004] To this end, the present invention provides a self-lubricating long rod spherical bearing to solve the problem that the friction and wear of the self-lubricating layer is relatively serious, and the failure of the self-lubricating spherical bearing is mainly due to the wear of the lining layer, resulting in a reduced service life of the self-lubricating bearing.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a self-lubricating long rod joint bearing, comprising an externally threaded rod end joint bearing, one side of the externally threaded rod end joint bearing is provided with an internally threaded rod end joint bearing, one end of the internally threaded rod end joint bearing extends into the interior of the externally threaded rod end joint bearing and is threadedly connected to the externally threaded rod end joint bearing, a nut is provided on the outside of the internally threaded rod end joint bearing through a threaded sleeve, a locking washer is provided on one side of the nut, the locking washer is sleeved on the outside of the internally threaded rod end joint bearing, the other side of the internally threaded rod end joint bearing is in contact with the externally threaded rod end joint bearing, one side of the externally threaded rod end joint bearing and the internally threaded rod end joint bearing are both fixedly provided with an outer ring, a liner is embedded in the outer ring, and a liner is provided inside the liner The inner ring, the external threaded rod end joint bearing, the internal threaded rod end joint bearing, the inner ring and the outer ring are made of a mixture of 42-57% aluminum alloy, 5-8% titanium alloy, 10-16% copper, 0.5-1.5% niobium, 1.2-3.1% chromium and 40-52% stainless steel; the nut is made of 35-45% chromium, 25-30% manganese and 32-40% silicon; the locking washer is made of 25-36% chromium, 18-26% nickel and 28-42% titanium alloy; the liner material is made of a uniform mixture of the following components: 15-25% polytetrafluoroethylene, 5-10% glass fiber, 13-26% polyvinyl alcohol acetal, 15-18% polyamide, 20-30% PTFE fiber, 20-30% aramid fiber and 3-8% copper-based powder.

[0006] Preferably, the specific steps are as follows:

[0007] S1. Forging: Use a CNC shearing machine to cut the raw materials into billets of specified sizes, and place the billets in a medium frequency induction furnace for heating in the order of melting point from high to low. During the smelting process, the molten metal is continuously stirred. The temperature is measured and controlled by an infrared thermometer. The heated billet is injected into the billet mold on the billet press. The billet mold needs to be preheated. The billet press is operated to forge the heated end of the billet. After the forging is completed, the middle skin or flash part of the final forging is cut off to become a forged product;

[0008] S2. Treatment: Use sandblasting, shot peening, sandpaper polishing and other methods to remove impurities such as oil, dust, and moisture on the surface of the inner ring and the inner surface of the outer ring to improve the roughness of the metal surface;

[0009] S3, pad weaving: PTFE fiber and aramid fiber are uniformly mixed and processed into yarn, and the yarn is used as warp yarn and glass fiber is used as weft yarn to alternately weave to form a fabric;

[0010] S4. Mixing of gasket materials: adding polytetrafluoroethylene, polyvinyl acetal, polyamide and copper-based powder into the hopper of the injection molding machine and stirring and mixing;

[0011] S5, plasticization: the material is placed in the barrel of the injection molding machine, and after being heated, compacted, and mixed under pressure and temperature, it becomes a continuous melt with uniform density. ZnO is added during the plasticization process;

[0012] S6. Die: Under the pressure of the rotating screw or plunger, the plasticized molten material is squeezed into the pouring system of the injection mold through the nozzle, and finally fills the entire mold cavity. Before pouring, the woven fabric is placed in the mold cavity. Through pouring, the molten material is fully pressed together with the fabric, and a pad is formed after cooling.

[0013] S7. Assembly: Apply anaerobic glue to the inner hole of the outer ring, press the gasket into the outer ring and bond it to the inner side of the outer ring, then press the inner ring into the outer ring so that the outer surface of the inner ring contacts the surface of the gasket.

[0014] Preferably, the heating temperature in step S1 is controlled between 1500-1750°C.

[0015] Preferably, in step S1, the preheating temperature of the blank-making mold is controlled to 110-150°C.

[0016] Preferably, in step S2, manganese steel shots with a diameter of 0.8-1.2 mm are sprayed out with compressed air, and a centrifugal shot peening machine throws them onto the surfaces of the inner ring and the outer ring by centrifugal force, and the steel shots are used to impact the surfaces of the inner ring and the outer ring, so that a hardened layer is generated on the inner ring and the outer ring.

[0017] Preferably, in step S3, after the fabric is woven, it is soaked in acetic acid for softening.

[0018] Preferably, in step S4, the stirring speed is controlled at 200 r / min.

[0019] Preferably, the heating temperature in step S5 is controlled at 210-230° C., and the pressure is controlled at 70-90 MPa.

[0020] Preferably, the cooling time in step S6 is controlled within 10-15 hours.

[0021] The embodiments of the present invention have the following advantages:

[0022] It can reduce the friction coefficient between the self-lubricating layer and the inner ring of the self-lubricating long rod spherical bearing, extend the service life of the long rod spherical bearing, and the long rod spherical bearing has high strength, low friction temperature, reduced friction loss, and reduced manufacturing process. It has excellent wear resistance and self-lubrication, and also has high load-bearing capacity, and is suitable for working under high temperature working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0024] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0025] Figure 1 A schematic diagram of the overall structure provided by the present invention;

[0026] Figure 2 A cross-sectional view of the overall structure provided by the present invention;

[0027] Figure 3 This is a cross-sectional view of the outer ring provided by the present invention.

[0028] In the figure: 1 external thread rod end joint bearing, 2 internal thread rod end joint bearing, 3 nut, 4 inner ring, 5 locking washer, 6 gasket, 7 outer ring. DETAILED DESCRIPTION

[0029] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Implementation 1:

[0031] Refer to the attached Figure 1-3The self-lubricating long rod joint bearing provided by the present invention comprises an externally threaded rod end joint bearing 1, one side of the externally threaded rod end joint bearing 1 is provided with an internally threaded rod end joint bearing 2, one end of the internally threaded rod end joint bearing 2 extends into the interior of the externally threaded rod end joint bearing 1 and is threadedly connected to the externally threaded rod end joint bearing 1, a nut 3 is provided on the outside of the internally threaded rod end joint bearing 2 through a threaded sleeve, a locking washer 5 is provided on one side of the nut 3, the locking washer 5 is sleeved on the outside of the internally threaded rod end joint bearing 2, the other side of the internally threaded rod end joint bearing 2 is in contact with the externally threaded rod end joint bearing 1, one side of the externally threaded rod end joint bearing 1 and the internally threaded rod end joint bearing 2 are both fixedly provided with an outer ring 7, a liner 6 is embedded in the outer ring 7, and an inner washer 6 is provided inside the liner 6 Ring 4, the external threaded rod end joint bearing 1, the internal threaded rod end joint bearing 2, the inner ring 4 and the outer ring 7 are made of a mixture of 42-57% aluminum alloy, 5-8% titanium alloy, 10-16% copper, 0.5-1.5% niobium, 1.2-3.1% chromium and 40-52% stainless steel, the nut 3 is made of 35-45% chromium, 25-30% manganese, 32-40% silicon, the locking washer 5 is made of 25-36% chromium, 18-26% nickel, and 28-42% titanium alloy, and the liner 6 material is made of the following components mixed uniformly: 15-25% polytetrafluoroethylene, 5-10% glass fiber, 13-26% polyvinyl acetal, 15-18% polyamide, 20-30% PTFE fiber, 20-30% aramid fiber, and 3-8% copper-based powder;

[0032] In this embodiment, the external threaded rod end joint bearing 1 and the internal threaded rod end joint bearing 2 are connected by threaded matching, and the liner 6 has good wear resistance and a small friction coefficient;

[0033] In order to achieve the purpose of production, the device is implemented by adopting the following technical solution: The specific steps are as follows:

[0034] S1. Forging: Use a CNC shearing machine to cut the raw materials into billets of specified sizes. Put the billets into a medium frequency induction furnace in the order of melting point from high to low and heat them. The heating temperature is controlled between 1500℃. The molten metal is continuously stirred during the smelting process. The temperature is measured and controlled by an infrared thermometer. The heated billet is injected into the billet mold on the billet press. The billet mold needs to be preheated. The preheating temperature of the billet mold is controlled to 110-150℃. The billet press is operated to forge the heated end of the billet. After the forging is completed, the middle skin or flash part of the final forging is cut off to become a forging product;

[0035] S2. Treatment: Use sandblasting, shot peening, sandpaper polishing and other methods to remove impurities such as oil, dust, and moisture from the outer surface of the inner ring 4 and the inner surface of the outer ring 7 to improve the roughness of the metal surface. Manganese steel shots with a diameter of 0.8-1.2 mm are ejected with compressed air. The centrifugal shot peening machine uses centrifugal force to throw them onto the surfaces of the inner ring 4 and the outer ring 7. The steel shots impact the surfaces of the inner ring 4 and the outer ring 7 to form a hardened layer on the inner ring 4 and the outer ring 7.

[0036] S3, pad weaving: PTFE fiber and aramid fiber are uniformly mixed and processed into yarn, and the yarn is then used as warp yarn and glass fiber is used as weft yarn to alternately weave to form a fabric, and after the fabric is woven, it is soaked in acetic acid for softening treatment;

[0037] S4. Mixing of gasket materials: Add polytetrafluoroethylene, polyvinyl acetal, polyamide and copper-based powder into the hopper of the injection molding machine and stir to mix, and the stirring speed is controlled at 200r / min;

[0038] S5, plasticization: the material is placed in the barrel of the injection molding machine, and after being heated, compacted and mixed under the action of pressure and temperature, it becomes a continuous melt with uniform density. ZnO is added during the plasticization process, the heating temperature is controlled at 210°C, and the pressure is controlled at 70Mpa;

[0039] S6. Die: Under the pressure of the rotating screw or plunger, the plasticized molten material is squeezed into the pouring system of the injection mold through the nozzle, and finally fills the entire mold cavity. Before pouring, the woven fabric is placed in the mold cavity. Through pouring, the molten material is fully pressed together with the fabric, and a cushion is formed after cooling. The cooling time is controlled at 10-15h.

[0040] S7. Assembly: Apply anaerobic glue to the inner hole of the outer ring 7, press the gasket into the outer ring 7 and bond it to the inner side of the outer ring 7, then press the inner ring 4 into the outer ring 7 so that the outer surface of the inner ring 4 contacts the surface of the gasket 6.

[0041] Implementation 2:

[0042] See attached Figure 1-3The self-lubricating long rod joint bearing provided by the present invention comprises an externally threaded rod end joint bearing 1, one side of the externally threaded rod end joint bearing 1 is provided with an internally threaded rod end joint bearing 2, one end of the internally threaded rod end joint bearing 2 extends into the interior of the externally threaded rod end joint bearing 1 and is threadedly connected to the externally threaded rod end joint bearing 1, a nut 3 is provided on the outside of the internally threaded rod end joint bearing 2 through a threaded sleeve, a locking washer 5 is provided on one side of the nut 3, the locking washer 5 is sleeved on the outside of the internally threaded rod end joint bearing 2, the other side of the internally threaded rod end joint bearing 2 is in contact with the externally threaded rod end joint bearing 1, one side of the externally threaded rod end joint bearing 1 and the internally threaded rod end joint bearing 2 are both fixedly provided with an outer ring 7, a liner 6 is embedded in the outer ring 7, and an inner washer 6 is provided inside the liner 6 Ring 4, the external threaded rod end joint bearing 1, the internal threaded rod end joint bearing 2, the inner ring 4 and the outer ring 7 are made of a mixture of 42-57% aluminum alloy, 5-8% titanium alloy, 10-16% copper, 0.5-1.5% niobium, 1.2-3.1% chromium and 40-52% stainless steel, the nut 3 is made of 35-45% chromium, 25-30% manganese, 32-40% silicon, the locking washer 5 is made of 25-36% chromium, 18-26% nickel, and 28-42% titanium alloy, and the liner 6 material is made of the following components mixed uniformly: 15-25% polytetrafluoroethylene, 5-10% glass fiber, 13-26% polyvinyl acetal, 15-18% polyamide, 20-30% PTFE fiber, 20-30% aramid fiber, and 3-8% copper-based powder;

[0043] In this embodiment, the external threaded rod end joint bearing 1 and the internal threaded rod end joint bearing 2 are connected by threaded matching, and the liner 6 has good wear resistance and a small friction coefficient;

[0044] In order to achieve the purpose of production, the device is implemented by adopting the following technical solution: The specific steps are as follows:

[0045] S1. Forging: Use a CNC shearing machine to cut the raw materials into billets of specified sizes, and place the billets in a medium frequency induction furnace for heating in the order of melting point from high to low. The heating temperature is controlled between 1600℃. The molten metal is continuously stirred during the smelting process. The temperature is measured and controlled by an infrared thermometer. The heated billet is injected into the billet mold on the billet press. The billet mold needs to be preheated. The preheating temperature of the billet mold is controlled to 110-150℃. The billet press is operated to forge the heated end of the billet. After the forging is completed, the middle skin or flash part of the final forging is cut off to become a forging product;

[0046] S2. Treatment: Use sandblasting, shot peening, sandpaper polishing and other methods to remove impurities such as oil, dust, and moisture from the outer surface of the inner ring 4 and the inner surface of the outer ring 7 to improve the roughness of the metal surface. Manganese steel shots with a diameter of 0.8-1.2 mm are ejected with compressed air. The centrifugal shot peening machine uses centrifugal force to throw them onto the surfaces of the inner ring 4 and the outer ring 7. The steel shots impact the surfaces of the inner ring 4 and the outer ring 7 to form a hardened layer on the inner ring 4 and the outer ring 7.

[0047] S3, pad weaving: PTFE fiber and aramid fiber are uniformly mixed and processed into yarn, and the yarn is then used as warp yarn and glass fiber is used as weft yarn to alternately weave to form a fabric, and after the fabric is woven, it is soaked in acetic acid for softening treatment;

[0048] S4. Mixing of gasket materials: Add polytetrafluoroethylene, polyvinyl acetal, polyamide and copper-based powder into the hopper of the injection molding machine and stir to mix, and the stirring speed is controlled at 200r / min;

[0049] S5, plasticization: the material is placed in the barrel of the injection molding machine, and after being heated, compacted and mixed under the action of pressure and temperature, it becomes a continuous melt with uniform density. ZnO is added during the plasticization process, the heating temperature is controlled at 220°C, and the pressure is controlled at 80Mpa;

[0050] S6. Die: Under the pressure of the rotating screw or plunger, the plasticized molten material is squeezed into the pouring system of the injection mold through the nozzle, and finally fills the entire mold cavity. Before pouring, the woven fabric is placed in the mold cavity. Through pouring, the molten material is fully pressed together with the fabric, and a cushion is formed after cooling. The cooling time is controlled at 10-15h.

[0051] S7. Assembly: Apply anaerobic glue to the inner hole of the outer ring 7, press the gasket into the outer ring 7 and bond it to the inner side of the outer ring 7, then press the inner ring 4 into the outer ring 7 so that the outer surface of the inner ring 4 contacts the surface of the gasket 6.

[0052] Implementation 3:

[0053] Refer to the attached Figure 1-3The self-lubricating long rod joint bearing provided by the present invention comprises an externally threaded rod end joint bearing 1, one side of the externally threaded rod end joint bearing 1 is provided with an internally threaded rod end joint bearing 2, one end of the internally threaded rod end joint bearing 2 extends into the interior of the externally threaded rod end joint bearing 1 and is threadedly connected to the externally threaded rod end joint bearing 1, a nut 3 is provided on the outside of the internally threaded rod end joint bearing 2 through a threaded sleeve, a locking washer 5 is provided on one side of the nut 3, the locking washer 5 is sleeved on the outside of the internally threaded rod end joint bearing 2, the other side of the internally threaded rod end joint bearing 2 is in contact with the externally threaded rod end joint bearing 1, one side of the externally threaded rod end joint bearing 1 and the internally threaded rod end joint bearing 2 are both fixedly provided with an outer ring 7, a liner 6 is embedded in the outer ring 7, and an inner washer 6 is provided inside the liner 6 Ring 4, the external threaded rod end joint bearing 1, the internal threaded rod end joint bearing 2, the inner ring 4 and the outer ring 7 are made of a mixture of 42-57% aluminum alloy, 5-8% titanium alloy, 10-16% copper, 0.5-1.5% niobium, 1.2-3.1% chromium and 40-52% stainless steel, the nut 3 is made of 35-45% chromium, 25-30% manganese, 32-40% silicon, the locking washer 5 is made of 25-36% chromium, 18-26% nickel, and 28-42% titanium alloy, and the liner 6 material is made of the following components mixed uniformly: 15-25% polytetrafluoroethylene, 5-10% glass fiber, 13-26% polyvinyl acetal, 15-18% polyamide, 20-30% PTFE fiber, 20-30% aramid fiber, and 3-8% copper-based powder;

[0054] In this embodiment, the external threaded rod end joint bearing 1 and the internal threaded rod end joint bearing 2 are connected by threaded matching, and the liner 6 has good wear resistance and a small friction coefficient;

[0055] In order to achieve the purpose of production, the device is implemented by adopting the following technical solution: The specific steps are as follows:

[0056] S1. Forging: Use a CNC shearing machine to cut the raw materials into billets of specified sizes. Put the billets into a medium frequency induction furnace in the order of melting point from high to low and heat them. The heating temperature is controlled between 1750℃. The metal solution is continuously stirred during the smelting process. The temperature is measured and controlled by an infrared thermometer. The heated billet is injected into the billet mold on the billet press. The billet mold needs to be preheated. The preheating temperature of the billet mold is controlled to 110-150℃. The billet press is operated to forge the heated end of the billet. After the forging is completed, the middle skin or flash part of the final forging is cut off to become a forging product;

[0057] S2. Treatment: Use sandblasting, shot peening, sandpaper polishing and other methods to remove impurities such as oil, dust, and moisture from the outer surface of the inner ring 4 and the inner surface of the outer ring 7 to improve the roughness of the metal surface. Manganese steel shots with a diameter of 0.8-1.2 mm are ejected with compressed air. The centrifugal shot peening machine uses centrifugal force to throw them onto the surfaces of the inner ring 4 and the outer ring 7. The steel shots impact the surfaces of the inner ring 4 and the outer ring 7 to form a hardened layer on the inner ring 4 and the outer ring 7.

[0058] S3, pad weaving: PTFE fiber and aramid fiber are uniformly mixed and processed into yarn, and the yarn is then used as warp yarn and glass fiber is used as weft yarn to alternately weave to form a fabric, and after the fabric is woven, it is soaked in acetic acid for softening treatment;

[0059] S4. Mixing of gasket materials: Add polytetrafluoroethylene, polyvinyl acetal, polyamide and copper-based powder into the hopper of the injection molding machine and stir to mix, and the stirring speed is controlled at 200r / min;

[0060] S5, plasticization: the material is placed in the barrel of the injection molding machine, and after being heated, compacted and mixed under the action of pressure and temperature, it becomes a continuous melt with uniform density. ZnO is added during the plasticization process, the heating temperature is controlled at 230°C, and the pressure is controlled at 90Mpa;

[0061] S6. Die: Under the pressure of the rotating screw or plunger, the plasticized molten material is squeezed into the pouring system of the injection mold through the nozzle, and finally fills the entire mold cavity. Before pouring, the woven fabric is placed in the mold cavity. Through pouring, the molten material is fully pressed together with the fabric, and a cushion is formed after cooling. The cooling time is controlled at 10-15h.

[0062] S7. Assembly: Apply anaerobic glue to the inner hole of the outer ring 7, press the gasket into the outer ring 7 and bond it to the inner side of the outer ring 7, then press the inner ring 4 into the outer ring 7 so that the outer surface of the inner ring 4 contacts the surface of the gasket 6.

[0063] The methods of the above embodiments 1-3 are respectively used to compare the rigidity of the self-lubricating long rod spherical bearing produced, the friction coefficient of the liner with the same swing frequency of 120 times / min and the temperature data of the friction heating after the self-lubricating long rod spherical bearing is used for 3 hours, the number of swings is 2000, and the temperature data of the friction heating are compared:

[0064] Friction coefficient Rising temperature Bearing rigidity Example 1 0.17 45℃ 67.42 Example 2 0.14 43℃ 72.21 Example 3 0.09 40℃ 78.32

[0065] It can be seen from the above that the self-lubricating long rod spherical bearing produced in Example 3 has high wear resistance and optimal bearing rigidity.

[0066] The above is only a preferred embodiment of the present invention. Any person skilled in the art may modify the present invention by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solution of the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A self-lubricating long rod spherical bearing, comprising an externally threaded rod end spherical bearing (1), characterized in that: An internally threaded rod end joint bearing (2) is provided on one side of the externally threaded rod end joint bearing (1), one end of the internally threaded rod end joint bearing (2) extends into the interior of the externally threaded rod end joint bearing (1) and is threadedly connected to the externally threaded rod end joint bearing (1), a nut (3) is provided on the exterior of the internally threaded rod end joint bearing (2) through a threaded sleeve, a locking washer (5) is provided on one side of the nut (3), the locking washer (5) is sleeved on the exterior of the internally threaded rod end joint bearing (2), the other side of the internally threaded rod end joint bearing (2) is in contact with the externally threaded rod end joint bearing (1), an outer ring (7) is fixedly provided on one side of the externally threaded rod end joint bearing (1) and the internally threaded rod end joint bearing (2), a liner (6) is embedded in the interior of the outer ring (7), and an inner ring (4) is provided in the interior of the liner (6). The external threaded rod end joint bearing (1), the internal threaded rod end joint bearing (2), the inner ring (4) and the outer ring (7) are made of a mixture of 42-57% aluminum alloy, 5-8% titanium alloy, 10-16% copper, 0.5-1.5% niobium, 1.2-3.1% chromium and 40-52% stainless steel; the nut (3) is made of 35-45% chromium, 25-30% manganese and 32-40% silicon; the locking washer (5) is made of 25-36% chromium, 18-26% nickel and 28-42% titanium alloy; the liner (6) material is made of the following components mixed uniformly: 15-25% polytetrafluoroethylene, 5-10% glass fiber, 13-26% polyvinyl alcohol acetal, 15-18% polyamide, 20-30% PTFE fiber, 20-30% aramid fiber and 3-8% copper-based powder; The specific steps are as follows: S1. Forging: Use a CNC shearing machine to cut the raw materials into billets of specified sizes, and place the billets in a medium frequency induction furnace for heating in the order of melting point from high to low. During the smelting process, the molten metal is continuously stirred. The temperature is measured and controlled by an infrared thermometer. The heated billet is injected into the billet mold on the billet press. The billet mold needs to be preheated. The billet press is operated to forge the heated end of the billet. After the forging is completed, the middle skin or flash part of the final forging is cut off to become a forged product; S2. Treatment: The outer surface of the inner ring (4) and the inner surface of the outer ring (7) are sandblasted, shot blasted, or polished with sandpaper to remove surface oil, dust, and moisture impurities, thereby increasing the roughness of the metal surface; S3, pad weaving: PTFE fiber and aramid fiber are uniformly mixed and processed into yarn, and the yarn is used as warp yarn and glass fiber is used as weft yarn to alternately weave to form a fabric; S4. Mixing of gasket materials: adding polytetrafluoroethylene, polyvinyl acetal, polyamide and copper-based powder into the hopper of the injection molding machine and stirring and mixing; S5, plasticization: the material is placed in the barrel of the injection molding machine, and after being heated, compacted and mixed under the action of pressure and temperature, it becomes a continuous melt with uniform density. ZnO is added during the plasticization process; S6. Die: Under the pressure of the rotating screw or plunger, the plasticized melt is squeezed into the pouring system of the injection mold through the nozzle, and finally fills the entire mold cavity. Before pouring, the woven fabric is placed in the mold cavity. Through pouring, the melt is fully pressed together with the fabric, and a cushion is formed after cooling; S7. Assembly: Apply anaerobic adhesive to the inner hole of the outer ring (7), press the liner into the outer ring (7) and bond it to the inner side of the outer ring (7), then press the inner ring (4) into the outer ring (7) so that the outer surface of the inner ring (4) contacts the surface of the liner (6).

2. The self-lubricating long rod spherical bearing according to claim 1, characterized in that: In step S1, the heating temperature is controlled between 1500-1750°C.

3. The self-lubricating long rod spherical bearing according to claim 1, characterized in that: In step S1, the preheating temperature of the blank making mold is controlled to 110-150°C.

4. The self-lubricating long rod spherical bearing according to claim 1, characterized in that: In step S2, manganese steel shots with a diameter of 0.8-1.2 mm are ejected by compressed air and thrown onto the surfaces of the inner ring (4) and the outer ring (7) by a centrifugal shot peening machine by centrifugal force, and the steel shots are used to impact the surfaces of the inner ring (4) and the outer ring (7), so that a hardened layer is formed on the inner ring (4) and the outer ring (7).

5. The self-lubricating long rod spherical bearing according to claim 1, characterized in that: In step S3, after the fabric is woven, it is soaked in acetic acid for softening.

6. The self-lubricating long rod spherical bearing according to claim 1, characterized in that: In step S4, the stirring speed is controlled at 200 r / min.

7. The self-lubricating long rod spherical bearing according to claim 1, characterized in that: In step S5, the heating temperature is controlled at 210-230° C., and the pressure is controlled at 70-90 MPa.

8. The self-lubricating long rod spherical bearing according to claim 1, characterized in that: The cooling time in step S6 is controlled within 10-15 hours.

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