A structurally sound rod end driven bearing device

Abstract

This invention relates to a structurally sound rod-end driven bearing device, mainly comprising an intermediate stator assembly, an outer rotating assembly, a lubricating bearing assembly, a front-end driven connecting component, a rear-end limiting support assembly, and a buffer and leakage component disposed between the fixed component and the rotating component. Utilizing aerodynamic principles, it rationally provides an efficient discharge channel for external dust or contaminants inevitably drawn into the junction of the fixed and rotating components during operation. This effectively overcomes the shortcomings of existing technologies where drawn-in dust or contaminants are squeezed in and held at high pressure above the oil sump, leading to damage to the oil seal and entry into the oil sump, thus affecting the normal operation of the ball bearing, the stability of the bearing device, and its normal service life. Furthermore, it requires frequent downtime for maintenance, affecting construction progress and work efficiency, increasing maintenance workload and daily operating costs. The device has a reasonable and scientific structure, reliable and stable operation, and strong practicality.

Description

Technical Field

[0001] This invention relates to the field of mechanical transmission components, and in particular to a structurally sound rod-end driven bearing device. Background Technology

[0002] Bearings are crucial components in modern machinery, primarily functioning to support rotating mechanical parts, reduce friction during movement, and ensure rotational accuracy and balanced operation. They are also functional components that reduce load friction during mechanical transmission. High load capacity, impact resistance, and a long reliable service life are their most basic requirements. Mechanical bearings are broadly classified into rolling bearings and sliding bearings based on the frictional nature between moving elements, and are widely used in their respective applicable machines and instruments. In heavy machinery, sliding bearings are often combined with other mechanical components to form suitable bearing devices that fix and limit the sliding bearings and provide some resistance to environmental influences. When installed at both ends of a rod, they serve to fix, support, and limit the rod ends, while also ensuring smooth, low-resistance operation of the rod. These devices are widely used in heavy machinery applications such as mechanical drilling, mining machinery, water conservancy, and environmental pollution treatment, where concentricity requirements are not high, the working environment is complex, surface pressure is high, and slow-moving oscillating or rotating motions are involved. This type of bearing device is collectively referred to in the industry as a rod end spherical bearing device, or simply a rod end bearing device. When in use, it is installed in pairs at both ends of the rod. There are active and driven types with slight differences in function and structure. The one installed at the end of the rod that receives external kinetic energy is the rod end main drive bearing device, and the one installed at the other end of the rod that provides support and is driven synchronously by the rotating rod is the rod end driven bearing device. The two are installed in pairs and operate in coordination to jointly support the rod in a stable working state. This invention relates to an innovative design product developed to overcome the shortcomings of existing traditional rod-end driven bearing devices. With technological advancements, the structure of traditional rod-end driven bearing devices has become increasingly sophisticated, generally comprising an intermediate stator assembly, an outer rotating assembly, a lubricating bearing assembly, a front-end driven connecting component, and a tail-end limiting support assembly. While initial performance is good, over time, their long-term operational stability is found to be poor, with a short continuous reliable service life. Uneven rotational speeds and even seizures frequently necessitate downtime for maintenance. During maintenance, it is often discovered that foreign matter has entered the lubricating oil ring groove, sometimes even solidifying within the groove, affecting the normal operation of the ball bearing and thus the smooth operation of the rod, consequently impacting work efficiency, construction quality, and construction costs. Therefore, existing rod-end driven bearing structures generally suffer from numerous shortcomings, including an unscientific and unreasonable structure, less than ideal practical performance, high daily maintenance workload, and high construction costs. From both economic and practical perspectives, they are not ideal. It is necessary to innovate and improve the structure from the perspective of rationalization and scientific design so that it can meet the special requirements of heavy mechanized operation equipment for high-load, high-efficiency, and low-cost construction in complex environments. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing rod end driven bearing devices and provide a new type of rod end driven bearing device with a relatively scientific and reasonable structure, strong anti-pollution and anti-interference capabilities, which helps to reduce the workload of daily maintenance, improve working stability and ensure normal service life, and can meet the requirements of efficient and continuous operation of applicable equipment in complex environments.

[0004] This invention relates to a rationally structured rod-end driven bearing device, the main body of which includes an intermediate stator assembly, an outer rotating assembly, a lubricating bearing assembly, a front-end driven connecting member, and a tail-end limiting support assembly. Its distinguishing feature is the addition of a buffer and leakage-prevention assembly, wherein:

[0005] The intermediate stator assembly includes a stator shaft, a fixing sleeve disposed around the stator shaft, and a positioning plate mounted on the tail end of the stator shaft and the fixing sleeve.

[0006] The peripheral rotating assembly includes a rotating shell and a rotating disk;

[0007] The lubricated bearing assembly includes a lubricating oil ring groove composed of an inner ring groove fixed on a fixed sleeve in the intermediate stator assembly and an outer ring groove fixed on a rotating shell in the peripheral rotating assembly, a ball bearing movably disposed in the lubricating oil ring groove, a leak-proof cap disposed at the bottom of the lubricating oil groove, and an oil seal disposed above the groove surface.

[0008] The main body of the front-end driven connecting component is in the shape of a stepped cylinder, consisting of a bottom seat ring and an upper rod end connecting sleeve. A limiting concave ring is fixed on the outer bottom ring surface of the bottom seat ring. Several pin protrusion limiting holes are fixed on the ring surface of the limiting concave ring as needed, and a limiting retaining ring is formed by the outer ring edge of the limiting concave ring.

[0009] The tail end limiting support assembly has the functions of traction reinforcement of the intermediate stator assembly and adjustment and control of the overall holding force, improving the overall stability. It mainly includes a threaded connecting sleeve set in the stator shaft, a push rod with one end fixed in the stator shaft and the other end screwed in the inner end of the threaded connecting sleeve, a thrust box fixed on the outer surface of the positioning plate, a spring box fixed on the outer surface of the thrust box, and a compression spring placed in the cavity of the spring box, a threaded screw with its main body extending in the spring box, one end passing through the positioning plate and the thrust box and screwed in the outer end of the threaded connecting sleeve, an internal thread that matches and meshes with the threaded screw, a screw nut with an external thread that matches and meshes with the internal thread of the spring box cylinder fixed at the outer front end, and a reinforced frame fixed in the middle on the outer edge of the spring box cylinder and with the support feet fixed on the back of the positioning plate near the edge.

[0010] The buffer leakage assembly includes a buffer moving ring disposed at the lower corner of the inner ring surface of the rotating disk, a plurality of anti-rotation pins laterally fixed on the inner ring surface near the buffer moving ring with their end faces flush with the inner ring surface of the buffer moving ring and having the function of blocking and limiting the displacement of the buffer moving ring, a buffer stationary ring whose upper limit is embedded on the front end surface of the fixed sleeve and is held and limited by a compression spring and a pin, and an external leakage groove located outside the junction of the buffer moving ring and the buffer stationary ring, formed by the gap between the assembly support on the rotating shell and the rotating disk after assembly, and located above the lubricating oil ring groove.

[0011] The fixed sleeve is fixedly sleeved around the stator shaft. A limiting protrusion is fixedly provided on the outer sleeve surface near the front end, and a bolt limiting mounting hole for assembling the interconnecting positioning plate is fixedly provided on the outer sleeve surface near the tail end. The bottom ring surface and the middle and lower outer sleeve surface of the limiting protrusion are the limiting fixing surfaces of the inner ring groove of the bearing. A limiting placement groove for the buffer stationary ring is recessed on the upper ring surface of the limiting protrusion, and a number of compression spring placement holes with elastic support pins for the buffer stationary ring are provided at the bottom of the groove.

[0012] The positioning disk body is disc-shaped, and the body covers and is installed on the tail end of the stator shaft and the fixed sleeve. It has the function of assembling and reinforcing the interconnecting intermediate stator assembly body and the tail end limiting support assembly. The body has a lead screw extension hole in the middle, a maintenance door fixed off-center, a top holding limiting protrusion fixed on the inner side corresponding to the inner ring groove on the fixed sleeve, and several bolt assembly holes corresponding to the bolt limiting installation holes on the fixed sleeve are fixed laterally as needed on the top holding limiting protrusion. Several lubricating oil injection holes are fixed as needed at the corresponding positions of the lubricating oil ring groove. Several support legs of the reinforced frame that are rigidly connected to the edge of the spring box are fixed near the edge of its outer disc surface.

[0013] The rotating shell body is an annular shape with several protruding mounting supports with mounting holes spaced at intervals on the top edge of the main surface. The inner ring surface is provided with a limiting retaining ring for limiting the outer ring groove and oil seal. The bottom surface is provided with several bolt mounting holes for limiting the installation of the leak-proof cap.

[0014] The rotating disk body is a disc-shaped object whose outer periphery matches the outer periphery of the rotating shell. It is connected to the mounting support on the rotating shell by fixing bolts and is set on the front end face of the rotating shell. A limiting protrusion is fixed on its inner ring surface. A buffer ring is set on one side of the limiting protrusion, and an anti-rotation pin is set on the other side. Its end is flush with the inner surface of the buffer ring and has the function of limiting the buffer ring. A limiting groove is fixed on the inner front surface of its main surface for mounting and holding the edge of the front driven connecting component, and an outwardly protruding driven limiting pin is embedded in the inner protruding ring of the limiting groove.

[0015] In its assembled state during operation, the intermediate stator assembly and the tail-end limiting support assembly are interconnected by the positioning plate, forming a rigid interconnected body with adjustable holding force and stable limiting support. The peripheral rotating assembly and the front-end driven connecting member are interlocked through the pin protruding limiting hole on the front-end driven connecting member and the convex driven limiting pin on the rotating plate, transmitting rotational kinetic energy. This drives the peripheral rotating assembly to rotate synchronously around the intermediate stator assembly under the support of the lubricated bearing assembly, and generates a decisive force at the junction of the intermediate stator assembly and the peripheral rotating assembly. The centrifugal force related to the rotation speed generates a corresponding suction force between the outer rotating component and the front driven connecting component. When the rotation speed is high enough, it will draw in the air containing dust or dirt around the rod end and guide it to the junction of the middle stator component and the outer rotating component. The air is then squeezed into the upper part of the lubricating oil ring groove and, under the action of centrifugal force, it flies out through the specially designed external discharge groove above the groove surface. This prevents the oil seal from being broken and the air from entering the lubricating oil ring groove, thus ensuring the safe operation of the ball bearing in the oil groove, as well as the unobstructed operation of the rod and the stability and continuous working life of the construction machinery.

[0016] Based on the above concept, the present invention's structurally sound rod-end driven bearing device features a rationally designed rigid support body with adjustable holding force, providing stable and reliable positioning of the rod end. Furthermore, by scientifically applying aerodynamic principles between the rotating and fixed bodies, a dedicated discharge channel is innovatively created to address the unavoidable inflow of environmental dust or contaminants into the junction of the intermediate stator assembly and the outer rotating assembly. This channel fully utilizes the centrifugal force generated at the front end and the outward discharge force at the rear end during bearing operation. This allows dust or contaminants from the surrounding environment to be drawn in, pass through the gap between the buffer stationary ring and the buffer moving ring, and then rapidly and unimpededly flow through the discharge groove outwards. This invention effectively prevents environmental dust or contaminants from being sucked in and damaging the oil seal, squeezing into the lubricating oil ring groove, affecting the normal operation of the ball bearing, or shortening its service life. It overcomes the problem in existing rod-end driven bearing devices where environmental dust or contaminants sucked into the junction are forced into the oil groove under high pressure due to lack of outlet, penetrating or damaging the oil seal and entering the oil groove. This can cause minor wear on the ball bearing surface, affecting the uniformity of rotation and thus the smoothness of the working rod's rotation; or even solidify and clump in the groove, preventing the ball bearing from rotating, thus affecting operation, causing downtime for maintenance, seriously impacting construction progress and work efficiency, while also increasing maintenance workload and construction costs. Clearly, the technical solution of this invention has the advantages of simple and scientifically reasonable structure, stable and reliable operation, long service life, and minimal maintenance workload. Its significant technical effects make it an ideal replacement for existing rod-end driven bearing devices. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the fixing sleeve in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the rotating shell in an embodiment of the present invention.

[0020] In the picture:

[0021] 1. Intermediate stator assembly; 11. Stator shaft; 12. Fixing sleeve; 121. Outer sleeve surface; 122. Limiting protrusion ring.

[0022] 1221. Bottom ring surface; 1222. Upper ring surface; 1223. Stationary ring mounting groove; 1224. Spring mounting hole.

[0023] 123. Bolt limiting mounting hole; 13. Positioning plate; 131. Maintenance door; 132. Top holding limiting protrusion ring.

[0024] 133. Bolt assembly hole; 134. Lubricating oil injection hole; 2. Peripheral rotating assembly; 21. Rotating shell.

[0025] 211. Assembly support column; 212. Limiting retaining ring; 213. Bolt mounting hole; 22. Rotary disc.

[0026] 221. Fixing bolt 222. Limiting protrusion 223. Limiting groove 224. Driven limiting pin

[0027] 3. Lubricated bearing assembly 31. Lubricating oil ring groove 311. Inner ring groove 312. Outer ring groove

[0028] 32. Ball bearing 33. Leak-proof cap 34. Oil seal 4. Front drive assembly 41. Bottom cylinder

[0029] 42. Rod end limiting connector 43. Limiting recessed ring 44. Pin limiting extension hole 45. Limiting retaining ring

[0030] 5. Tail-end limiting support assembly; 51. Threaded connecting sleeve; 52. Push rod; 53. Thrust box.

[0031] 54. Spring box 55. Compression spring 56. Threaded screw 57. Screw nut 58. Reinforced frame

[0032] 6. Buffer and Leakage Assembly 61. Buffer Moving Ring 62. Buffer Stationary Ring 63. Anti-rotation Pin 64. Leakage Channel Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and typical embodiments.

[0034] exist Figure 1 , Figure 2 and Figure 3 The present invention relates to a structurally sound rod-end driven bearing device, the main body of which includes an intermediate stator assembly 1, an outer rotating assembly 2, a lubricating bearing assembly 3, a front-end driven connecting member 4, and a tail-end limiting support assembly 5. Its distinguishing feature is the addition of a buffer and leakage-prevention assembly 6, wherein:

[0035] The intermediate stator assembly 1 includes a stator shaft 11, a fixing sleeve 12 disposed around the stator shaft 11, and a positioning disk 13 mounted on the tail end of the stator shaft 11 and the fixing sleeve 12.

[0036] The peripheral rotating assembly 2 includes a rotating shell 21 and a rotating disk 22;

[0037] The lubricated bearing assembly 3 includes a lubricating oil ring groove 31 composed of an inner ring groove ring 311 fixed on the fixed sleeve 12 in the intermediate stator assembly 1 and an outer ring groove ring 312 fixed on the rotating shell 21 in the peripheral rotating assembly 2, a ball bearing 32 movably disposed in the lubricating oil ring groove 31, a leak-proof cap 33 disposed at the bottom of the lubricating oil ring groove 31, and an oil seal 34 disposed above the groove surface.

[0038] The main body of the front-end driven connecting member 4 is in the shape of a stepped cylinder, consisting of a bottom seat ring 41 and an upper rod end connecting sleeve 42. A limiting concave ring 43 is fixed on the outer bottom ring surface of the bottom seat ring 41. Several pin protrusion limiting holes 44 are fixed on the ring surface of the limiting concave ring 43 as needed, and a limiting retaining ring 45 is formed by the outer ring edge of the limiting concave ring 43.

[0039] The tail end limiting support assembly 5 has the functions of traction and reinforcement of the intermediate stator assembly 1 and adjustment and control of the overall holding force to improve the overall stability. It mainly includes a threaded connecting sleeve 51 set in the stator shaft 11, a push rod 52 with one end fixed in the stator shaft 11 and the other end screwed into the inner end of the threaded connecting sleeve 51, a thrust box 53 fixed on the outer surface of the positioning plate 13, a spring box 54 fixed on the outer surface of the thrust box 53, and a spring box 54 housed in the cavity of the spring box 54. The compression spring 55 has a main body extending inside the spring box 54, one end passing through the positioning plate 13 and the thrust box 53 and then screwed into the outer end of the threaded connecting sleeve 51. It has an internal thread that matches and engages with the threaded rod 56, and a screw nut 57 that matches and engages with the internal thread of the spring box 54 cylinder opening at the outer front end. It also has a reinforced frame 58 that is fixed in the middle on the outer edge of the spring box 54 cylinder opening and has its support feet fixed on the back of the positioning plate 13 near the edge.

[0040] The buffer leakage assembly 6 includes a buffer moving ring 61 disposed at the lower corner of the inner ring surface of the rotating disk 22, a plurality of anti-rotation pins 63 laterally fixed on the inner ring surface near the buffer moving ring 61 with their end faces flush with the inner ring surface of the buffer moving ring 61 and having the function of blocking and limiting the displacement of the buffer moving ring 61, a buffer stationary ring 62 upperly limited and embedded on the front end surface of the fixed sleeve 12 and held and limited by a compression spring and a pin, and an external leakage groove 64 located outside the junction of the buffer moving ring 61 and the buffer stationary ring 62, formed by the gap between the assembly support column 211 on the rotating shell 21 and the rotating disk 22 after assembly, and located above the lubricating oil ring groove 31.

[0041] The fixed sleeve 12 is fixedly sleeved around the stator shaft 11. A limiting protrusion ring 122 is fixedly provided near the front end of its outer sleeve surface 121, and a bolt limiting mounting hole 123 for assembling the interconnecting positioning plate is fixedly provided transversely on the outer side near the tail end. The bottom ring surface 1221 and the middle and lower outer sleeve surface 121 of the limiting protrusion ring 122 are the limiting fixing surfaces of the inner ring groove ring 311 of the bearing. The upper ring surface 1222 of the limiting protrusion ring 122 is recessed with a limiting placement groove 1223 for the buffer stationary ring 62, and a plurality of compression spring placement holes 1224 with elastic support pins for the buffer stationary ring 62 are provided at the bottom of the groove.

[0042] The positioning disk 13 is mainly disc-shaped, covering and installed at the tail end of the main body of the stator shaft 11 and the fixed sleeve 12. It has the function of assembling and reinforcing the main body of the intermediate stator assembly 1 and the tail end limiting support assembly 5. The main body is provided with a lead screw extension hole in the middle, a maintenance door 131 is fixed off-center, a top holding limiting protrusion ring 132 is fixed on the inner side corresponding to the inner ring groove 311 on the fixed sleeve 12, and a number of bolt assembly holes 133 corresponding to the bolt limiting installation holes 123 on the fixed sleeve 12 are fixed laterally as needed on the top holding limiting protrusion ring 132. A number of lubricating oil injection holes 134 are fixed as needed at the corresponding position of the lubricating oil ring groove 31. A number of support legs of the reinforced frame 58 rigidly connected to the edge of the spring box 54 are fixed near the edge of its outer disc surface.

[0043] The rotating shell 21 is a ring-shaped structure with several protruding mounting supports 211 having mounting holes spaced at intervals on the top edge of the main surface. The inner ring surface is provided with a limiting retaining ring 212 for limiting the outer ring groove ring 312 and the oil seal 34. The bottom surface is provided with several bolt mounting holes 213 for limiting the installation of the leak-proof cover 33.

[0044] The main body of the rotating disk 22 is a disc-shaped object that fits the outer periphery of the rotating shell 21. It is connected to the mounting support 211 on the rotating shell 21 by fixing bolts 221 and is set on the front end face of the rotating shell 21. A limiting protrusion 222 is fixed on its inner ring surface. A buffer ring 61 is set on one side of the limiting protrusion 222, and an anti-rotation pin 63 is set on the other side. Its end is flush with the inner surface of the buffer ring 61 and has the function of limiting the buffer ring 61. A limiting groove 223 for mounting and limiting the edge of the front driven connecting member 4 is fixed on the inner front surface of its main surface, and an outwardly protruding driven limiting pin 224 is embedded in the inner protruding ring of the limiting groove 223.

[0045] In its assembled state during operation, the intermediate stator assembly 1 and the tail-end limiting support assembly 5 are interconnected by the positioning disk 13, forming a rigid interconnected body with adjustable holding force and stable limiting support. The peripheral rotating assembly 2 and the front-end driven connecting member 4 are interlocked through the pin protrusion limiting hole 44 on the front-end driven connecting member 4 and the convex driven limiting pin 225 on the rotating disk 22, transmitting rotational kinetic energy and driving the peripheral rotating assembly 2 to rotate synchronously around the intermediate stator assembly 1 under the support of the lubricated bearing assembly 3, and generating a torque at the junction of the intermediate stator assembly 1 and the peripheral rotating assembly 2. The centrifugal force depends on the rotation speed, and at the same time, a corresponding suction force is generated between the outer rotating component 2 and the front driven connecting component 4. When the rotation speed is large enough, the air containing dust or dirt around the rod end will be sucked in and guided to the junction of the middle stator component 1 and the outer rotating component 2, and squeezed into the upper part of the lubricating oil ring groove 31. Under the action of centrifugal force, it will fly out through the external leakage groove 64 specially set above the groove surface, and will not cause the oil seal 34 to be broken and enter the lubricating oil ring groove 31. This ensures the safe operation of the ball bearing in the oil groove, as well as the unobstructed operation of the rod and the stability and continuous working life of the construction machinery.

Claims

1. A structurally sound rod-end driven bearing device, comprising a central stator assembly (1), a peripheral rotating assembly (2), a lubricating bearing assembly (3), a front-end driven connecting member (4), and a rear-end limiting support assembly (5), characterized in that... A buffer and leakage prevention component (6) is also added, wherein: The intermediate stator assembly (1) includes a stator shaft (11), a fixing sleeve (12) disposed around the stator shaft (11), and a positioning disk (13) mounted on the tail end of the stator shaft (11) and the fixing sleeve (12); The peripheral rotating assembly (2) includes a rotating shell (21) and a rotating disk (22); The lubricated bearing assembly (3) includes a lubricating oil ring groove (31) composed of an inner ring groove (311) fixed on the fixed sleeve (12) in the intermediate stator assembly (1) and an outer ring groove (312) fixed on the rotating shell (21) in the peripheral rotating assembly (2), a ball bearing (32) movably installed in the lubricating oil ring groove (31), a leak-proof cap (33) provided at the bottom of the lubricating oil ring groove (31), and an oil seal (34) provided above the groove surface; The main body of the front-end driven connecting member (4) is a stepped cylindrical shape, consisting of a bottom seat ring (41) and an upper rod end connecting sleeve (42). A limiting concave ring (43) is fixed on the outer bottom ring surface of the bottom seat ring (41). Several pin protrusion limiting holes (44) are fixed on the ring surface of the limiting concave ring (43) as needed, and a limiting retaining ring (45) is formed by the outer ring edge of the limiting concave ring (43). The tail end limiting support assembly (5) has the functions of traction and reinforcement of the intermediate stator assembly (1) and adjustment and control of the overall holding force and improvement of overall stability. It mainly includes a threaded connecting sleeve (51) set in the stator shaft (11), a push rod (52) with one end fixed in the stator shaft (11) and the other end screwed into the inner end of the threaded connecting sleeve (51), a thrust box (53) fixed on the outer surface of the positioning plate (13), a spring box (54) fixed on the outer surface of the thrust box (53), and a spring box (54) placed in the cavity of the spring box (54). The compression spring (55) has a main body extending inside the spring box (54), one end passing through the positioning plate (13) and the thrust box (53) and then screwed into the outer end of the threaded connecting sleeve (51). It has an internal thread that matches and meshes with the threaded rod (56), and a screw nut (57) that matches and meshes with the internal thread of the spring box (54) cylinder opening. It also has a reinforced frame (58) that is fixed in the middle on the outer edge of the spring box (54) cylinder opening and has its support feet fixed on the back of the positioning plate (13) near the edge. The buffer leakage assembly (6) includes a buffer moving ring (61) disposed at the lower corner of the inner ring surface of the rotating disk (22), a plurality of anti-rotation pins (63) that are laterally fixed on the inner ring surface near the buffer moving ring (61) with their end faces flush with the inner ring surface of the buffer moving ring (61) and have the function of blocking and limiting the displacement of the buffer moving ring (61), a buffer stationary ring (62) that is upperly limited and embedded on the front end surface of the fixed sleeve (12) and held and limited by a compression spring and a pin, and an external leakage groove (64) located outside the junction of the buffer moving ring (61) and the buffer stationary ring (62), formed by the gap between the assembly support (211) on the rotating shell (21) and the rotating disk (22) after assembly, and located above the lubricating oil ring groove (31). The fixed sleeve (12) is fixedly sleeved around the stator shaft (11). A limiting protrusion ring (122) is fixedly provided near the front end of its outer sleeve surface (121). A bolt limiting mounting hole (123) for assembling the interconnecting positioning plate is fixedly provided on the outer side near the tail end. The bottom ring surface (1221) and the middle and lower outer sleeve surface (121) of the limiting protrusion ring (122) are the limiting fixing surfaces of the inner ring groove ring (311) of the bearing. The upper ring surface (1222) of the limiting protrusion ring (122) is recessed with a limiting placement groove (1223) for the buffer stationary ring (62), and a number of compression spring placement holes (1224) with elastic support pins for the buffer stationary ring (62) are provided at the bottom of the groove. The positioning disk (13) is in the shape of a disc. The main body covers and is installed on the tail end of the main body of the stator shaft (11) and the fixed sleeve (12). It has the function of assembling the main body of the reinforced interconnecting intermediate stator assembly (1) and the tail end limiting support assembly (5). The main body is provided with a screw extension hole in the middle, a maintenance door (131) is fixed off-center, a top holding limiting protrusion (132) is fixed on the inner side corresponding to the inner ring groove (311) on the fixed sleeve (12), and a number of bolt assembly holes (133) corresponding to the bolt limiting installation holes (123) on the fixed sleeve (12) are fixed laterally as needed on the top holding limiting protrusion (132). A number of lubricating oil injection holes (134) are fixed on the corresponding position of the lubricating oil ring groove (31) as needed. A number of the feet of the reinforced frame (58) rigidly connected to the edge of the spring box (54) are fixed near the edge of its outer disc surface. The rotating shell (21) body is an annular shape with several protruding mounting supports (211) with mounting holes provided at intervals on the top edge of the main surface. The inner ring surface is provided with a limiting retaining ring (212) for limiting the outer ring groove ring (312) and the oil seal (34). The bottom surface is provided with several bolt mounting holes (213) for limiting the installation of the leak-proof cover (33). The main body of the rotating disk (22) is a disc-shaped object that fits the outer periphery of the rotating shell (21). It is connected to the mounting support (211) on the rotating shell (21) by fixing bolts (221) and is set on the front end face of the rotating shell (21). A limiting protrusion (222) is fixed on its inner ring surface. The buffer ring (61) is set on one side of the limiting protrusion (222), and an anti-rotation pin (63) is set on the other side. Its end is flush with the inner side of the buffer ring (61) and has the function of limiting the buffer ring (61). A limiting groove (223) for mounting and holding the edge of the front driven connecting member (4) is fixed on its main surface near the inner front end, and an outwardly protruding driven limiting pin (224) is embedded in the inner protruding ring of the limiting groove (223). In the assembled state during operation, the intermediate stator assembly (1) and the tail end limiting support assembly (5) are interconnected by the positioning disk (13) to form a rigid interconnected body with adjustable top holding force and stable limiting support. The peripheral rotating assembly (2) and the front end driven connecting member (4) are connected to each other through the pin protruding limiting hole (44) on the front end driven connecting member (4) and the convex driven limiting pin on the rotating disk (22), and transmit rotational kinetic energy, driving the peripheral rotating assembly (2) to rotate synchronously around the intermediate stator assembly (1) under the support of the lubricated bearing assembly (3), and between the intermediate stator assembly (1) and the peripheral rotating assembly (2). The junction generates centrifugal force depending on the rotation speed, and at the same time, a corresponding suction force is generated between the outer rotating component (2) and the front driven connecting component (4). When the rotation speed is large enough, the air containing dust or dirt around the rod end will be sucked in and guided to the junction of the middle stator component (1) and the outer rotating component (2), and squeezed into the upper part of the lubricating oil ring groove (31). Under the action of centrifugal force, it will fly out through the external leakage groove (64) specially set above the groove surface, and will not break the oil seal (34) or enter the lubricating oil ring groove (31), thereby ensuring the safe operation of the ball bearing in the oil groove, as well as ensuring the unobstructed operation of the rod and the stability and continuous working life of the construction machinery.

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