Bracket bearing seat assembly and universal coupling

Abstract

The invention discloses a bracket bearing seat assembly and a universal coupling, and belongs to the technical field of universal couplings. The assembly comprises an upper split bearing seat and a lower split bearing seat which are buckled to form a mounting cavity, and a sliding assembly, a lubricating assembly and a sealing assembly which are arranged in the cavity. The bearing seat is characterized in that the joint surfaces of the upper and lower bearing seats are matched and positioned by adopting a clamping sleeve structure. According to the structure, through mechanical embedding of the protrusions and the clamping grooves, the relative displacement of the upper bearing seat and the lower bearing seat in the axial direction and the radial direction is effectively limited, the problem that an engagement bolt is broken due to shell dislocation under heavy-load vibration of an existing split structure is solved, and the overall rigidity and operation stability of an assembly are remarkably improved; and meanwhile, by matching thin oil lubrication and sliding half bearing bush design, sufficient lubrication is realized, the service life is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of universal coupling technology, and in particular to a bracket bearing housing assembly and a universal coupling. Background Technology

[0002] With the development of metallurgical machinery and heavy transmission technology, universal couplings, as crucial components connecting drive units and working machines, directly impact the quality and production efficiency of rolled steel products through their operational stability. Among these, the bracket bearing housing assembly, as the core support component of the universal coupling, primarily functions to support the shaft, ensure transmission accuracy, and mitigate shaft impact through its interaction with the machine frame. To accommodate the installation requirements of large equipment, current bracket bearing housings typically employ a split-type design.

[0003] In traditional technology, the bearing housing typically uses a ball bearing (rolling bearing) structure to support the rotating shaft, and is lubricated with grease. In terms of housing structure, existing split bearing housings (as shown in the traditional structure in the attached figure) usually have the upper and lower bearing housings mated with planar mating surfaces and connected and fixed by bolts or locating pins to achieve the encapsulation and support of the internal bearings.

[0004] However, the current traditional bracket bearing housing structure has many problems in practical applications. First, in terms of structural stability, since the upper and lower bearing housings mainly rely on planar connection, under long-term vibration and impact loads from heavy universal couplings, the upper and lower housings are prone to relative misalignment, causing the connecting bolts to be subjected to huge shear forces and break, posing a serious safety hazard. Second, in terms of maintenance costs and lubrication, traditional ball bearings are mostly imported components, which are expensive and cannot be repaired after wear. Dry lubrication is ineffective, leading to easy bearing wear and short lifespan. Furthermore, the existing sealing structure is prone to oil leakage, and disassembly, assembly, and maintenance are extremely difficult. Summary of the Invention

[0005] Therefore, it is necessary to provide a bracket bearing housing assembly and a universal coupling to address the above problems.

[0006] This application provides a bracket bearing housing assembly, including: The split bearing housing includes a detachably connected upper bearing housing and a lower bearing housing, wherein the upper bearing housing and the lower bearing housing are fastened together to form an installation cavity; A sliding assembly disposed within the mounting cavity includes a pair of half-bearing bushes; A lubrication assembly, disposed on the bearing housing, is used to lubricate the sliding assembly with thin oil; And sealing components, which are disposed at both axial ends of the bearing housing; The mating surfaces of the upper and lower bearing seats are fitted and positioned using a ferrule structure to limit the relative displacement of the upper and lower bearing seats in the axial and radial directions.

[0007] Optionally, the ferrule structure includes a protrusion and a corresponding slot, the protrusion being disposed on one of the upper bearing seat or the lower bearing seat, and the slot being disposed on the other of the upper bearing seat or the lower bearing seat. The slot is formed by a pair of vertically arranged columns, and the distance between the pair of columns is adapted to the width of the protrusion so that the protrusion can be positioned and engaged in the slot when the upper bearing seat and the lower bearing seat are installed.

[0008] Optionally, the protrusion is provided with a through hole, and the bottom surface of the slot is provided with a bolt hole corresponding to the through hole. The through hole and the bolt hole cooperate to pass a bolt through to fix the upper bearing seat and the lower bearing seat.

[0009] Optionally, the sliding assembly further includes a pair of semi-annular side grinding plates mounted on the two side walls of the mounting cavity. The semi-annular side grinding plates are not complete semi-annular structures. A gap is left at the joint of the pair of semi-annular side grinding plates after they are joined together. The gap is configured as a lubricating oil flow channel so that the lubricating oil can flow out and lubricate the semi-annular side grinding plates.

[0010] Optionally, both the semi-shaft bearing and the semi-ring side grinding plate adopt a composite structure, including a copper substrate and an alloy layer fused to the surface of the copper substrate. The surface of the copper substrate of the semi-shaft bearing is machined with an inner groove, and the surface of the semi-ring side grinding plate is machined with a dovetail groove. The alloy layer is attached to the copper substrate through the inner groove and the dovetail groove.

[0011] Optionally, the bearing housing assembly further includes a support assembly for supporting the bearing housing to protect the sealing structure in a non-operating state. The support assembly includes an oil receiving box disposed at the end of the bearing housing. The upper part of the oil receiving box has a groove, and a support half-ring is installed in the groove. The support half-ring is fixed by a half-ring support key. The support half-ring is configured to support the drive shaft when the drive shaft is not running, so as to maintain the gap between the sealing structure and the side grinding plate and the drive shaft.

[0012] Optionally, the support assembly further includes a pressure cap oil box, which is installed on the axial outside of the sealing structure. The bottom of the pressure cap oil box is provided with an oil drain hole for collecting and draining lubricating oil leaked due to the failure of the sealing structure. Multiple oil drain holes are provided along the height direction to accommodate the return oil height of different shaft arrangements.

[0013] Optionally, the lubrication assembly includes: The main oil inlet hole is located at the top center of the upper bearing housing and is used to inject lubricating oil into the main load-bearing area of ​​the sliding assembly in the mounting cavity. A secondary oil inlet hole is provided on both sides of the upper bearing housing. The position of the secondary oil inlet hole corresponds to the side area of ​​the sliding assembly and is used to assist in oil intake or to flush and lubricate the side grinding plate.

[0014] Optionally, the lubrication assembly further includes a venting mechanism disposed on the top of the upper bearing housing and communicating with the mounting cavity. The venting mechanism is used to balance the air pressure in the mounting cavity and prevent air resistance from affecting oil intake.

[0015] Optionally, the end of the half bearing bush is provided with a pressure plate fixing groove, and a half bearing bush fixing pressure plate is detachably connected to the inner wall of the mounting cavity by fasteners. The end of the half bearing bush fixing pressure plate extends and is inserted into the pressure plate fixing groove to lock the half bearing bush on the bearing housing.

[0016] This application also provides a universal coupling, including the aforementioned bracket bearing housing assembly.

[0017] Compared with the prior art, the technical solution provided in this application has the following advantages: The aforementioned bracket bearing housing assembly is primarily used in the support components of heavy-duty universal couplings. Its core structure employs a split bearing housing design, consisting of an upper and lower bearing housing bolted together to form a closed mounting cavity. This split design completely changes the difficult maintenance situation of traditional integral bearing housings. When internal components wear out, replacement can be performed simply by removing the top cover, without disassembling the entire drive shaft system. Pairs of half-bearing shells (i.e., sliding components) are installed within the mounting cavity, replacing traditional ball bearings and working in conjunction with a thin oil lubrication component, thus solving the problems of poor dry oil lubrication and short bearing life associated with traditional methods.

[0018] While existing technologies also employ a split-shell design, the mating surfaces of the upper and lower bearing housings are typically planar. When dealing with the high-frequency vibrations and impact loads of heavy-duty universal couplings, they rely primarily on the bolt shafts or locating pins to withstand enormous shear forces, making them highly susceptible to fretting wear and even bolt breakage. This embodiment, to ensure the stability of the split structure, utilizes a ferrule structure for positioning at the mating surfaces of the upper and lower bearing housings. This effectively limits the relative misalignment of the upper and lower housings in the axial and radial directions. Compared to relying solely on bolt friction for positioning, this structure can withstand greater impact loads, fundamentally avoiding the risk of bolt breakage caused by misalignment of the upper and lower bearing housings due to long-term equipment vibration, and significantly improving the overall operational stability of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a bracket bearing housing assembly provided in one embodiment of this application; Figure 2 This is a schematic diagram of the structure of the upper bearing housing provided in one embodiment of this application; Figure 3 This is a schematic diagram of the structure of the lower bearing housing provided in one embodiment of this application; Figure 4 This is a schematic diagram of the structure of a semi-annular side grinding plate provided in an embodiment of this application; Figure 5 for Figure 4 Sectional view along the middle AA direction; Figure 6 This is a schematic diagram of the structure of a half-bearing bush provided in an embodiment of this application; Figure 7 This is another structural schematic diagram of a semi-annular side grinding plate provided in one embodiment of this application; Figure 8 A schematic diagram of the axial cross-sectional structure of a bracket bearing housing assembly provided in an embodiment of this application; Figure 9 This is a schematic diagram of the structure of an oil receiving box provided in an embodiment of this application.

[0020] Explanation of reference numerals in the attached figures: 1. Bearing housing; 11. Upper bearing housing; 12. Lower bearing housing; 13. Protrusion; 14. Column; 2. Sliding assembly; 21. Half bearing shell; 211. Inner groove; 212. Pressure plate fixing groove; 22. Semi-ring side grinding plate; 221. Dovetail groove; 23. Semi-ring fixing pressure plate; 3. Lubrication assembly; 31. Main oil inlet; 32. Secondary oil inlet; 33. Venting mechanism; 4. Sealing assembly; 5. Support assembly; 51. Oil receiving box; 52. Supporting semi-ring; 53. Pressure cover oil box; 531. Oil drain hole. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] See Figure 1An embodiment of the present invention provides a bracket bearing housing assembly, comprising: a split bearing housing housing 1, which includes an upper bearing housing 11 and a lower bearing housing 12 detachably connected, the upper bearing housing 11 and the lower bearing housing 12 being engaged to form a mounting cavity; a sliding assembly 2 disposed within the mounting cavity, including a pair of half-bearing shells 21; a lubrication assembly 3 disposed on the bearing housing housing 1 for lubricating the sliding assembly 2 with thin oil; and a sealing assembly 4 disposed at both axial ends of the bearing housing housing 1; wherein the mating surfaces of the upper bearing housing 11 and the lower bearing housing 12 are fitted and positioned using a ferrule structure to limit the relative displacement of the upper bearing housing 11 and the lower bearing housing 12 in the axial and radial directions.

[0023] Reference Appendix Figure 1 , Figure 2 and Figure 3 This embodiment provides a bracket bearing housing assembly. This assembly is mainly used in the support part of heavy-duty universal couplings. Its core structure adopts a split bearing housing housing 1 design, which is formed by bolting together an upper bearing housing 11 and a lower bearing housing 12, forming a closed mounting cavity inside. This split design completely changes the difficult maintenance situation of traditional integral bearing housings. When the internal components are worn, they can be replaced simply by removing the top cover, without disassembling the entire drive shaft system. A pair of half-bearing shells 21 (i.e., sliding components 2) are provided in the mounting cavity, replacing the traditional ball bearings, and work in conjunction with the thin oil lubrication component 3, thereby solving the problems of poor dry oil lubrication and short bearing life in traditional systems.

[0024] Reference Appendix Figure 2 and Figure 3 Although existing technologies also employ a split-shell design, the mating surfaces of the upper and lower bearing seats are typically planar fits. When dealing with the high-frequency vibrations and impact loads of heavy-duty universal couplings, they mainly rely on the bolt shafts or locating pins to withstand enormous shear forces, making them highly susceptible to fretting wear and even bolt shearing. In this embodiment, to ensure the stability of the split structure, a ferrule structure is used for positioning at the mating surfaces of the upper bearing seat 11 and the lower bearing seat 12. This effectively limits the relative misalignment of the upper and lower bearing seats in the axial and radial directions. Compared to simply relying on bolt friction for positioning, this structure can withstand greater impact loads, fundamentally avoiding the risk of bolt breakage caused by misalignment of the upper and lower bearing seats 12 due to long-term equipment vibration, and significantly improving the overall operational stability of the equipment.

[0025] Reference Appendix Figure 3In one embodiment, the ferrule structure includes a protrusion 13 and a corresponding slot. The protrusion 13 is disposed on one of the upper bearing seat 11 or the lower bearing seat 12, and the slot is disposed on the other of the upper bearing seat 11 or the lower bearing seat 12. The slot is formed by a pair of vertically arranged posts 14, the spacing of which is adapted to the width of the protrusion 13, so that the protrusion 13 can be positioned and engaged in the slot when the upper bearing seat 11 and the lower bearing seat 12 are installed.

[0026] Reference Appendix Figure 3 This embodiment further defines the ferrule structure form in Embodiment 1. Specifically, the ferrule structure is formed by a protrusion 13 on one side (e.g., the lower bearing housing 12) and a groove on the other side (e.g., the upper bearing housing 11). This groove is not a simple recess, but is formed by a pair of vertically extending posts 14. The distance between these posts 14 is precisely machined to form a tight clearance fit with the width of the protrusion 13. The technical advantage of this design is that during assembly, the posts 14 act as guides, allowing the upper bearing housing 11 to slide quickly and accurately into the predetermined position, achieving "cross positioning." This not only reduces the reliance on the assembly worker's experience but also ensures the coaxiality of the half-bearing assembly, avoiding bearing jamming or unilateral wear problems caused by assembly errors.

[0027] Reference Appendix Figure 1 and Figure 3 In one embodiment, the protrusion 13 has a through hole, and the bottom surface of the slot has a bolt hole corresponding to the through hole. The through hole and the bolt hole mate to allow a bolt to pass through and fix the upper bearing seat 11 and the lower bearing seat 12. This embodiment is a refinement of the connection method in the aforementioned embodiments. The protrusion 13 structure has a through hole, and the bottom surface of the slot has a corresponding bolt hole (or threaded hole). When the protrusion 13 is inserted into the slot, the bolt is directly screwed through the through hole of the protrusion 13 into the bolt hole at the bottom of the slot. This design combines the positioning structure and the fastening structure into one, allowing the bolt's tightening force to act directly on the positioning mating surface, greatly enhancing the rigidity of the connection.

[0028] Reference Appendix Figure 1 and Figure 3 This connection method, combined with the aforementioned cross-clamp structure, solves the problem of loosening that can occur with traditional structures after long-term use. Because the cross-clamp structure restricts the relative movement of the upper and lower bearing bodies, and is coupled with through-bolt fastening, it effectively prevents the upper and lower bearing seats 12 from loosening due to long-term vibration, thus avoiding shear breakage of the connecting bolts. This design significantly improves the overall stability of the bearing housing, enabling it to withstand harsh working conditions such as high-impact, high-vibration rolling mills, ensuring the long-term safe operation of the equipment.

[0029] Reference Appendix Figure 6and Figure 8 In one embodiment, a pressure plate fixing groove 212 is provided at the end of the half bearing shell 21, and a half bearing fixing pressure plate is detachably connected to the inner wall of the mounting cavity by fasteners. The end of the half bearing fixing pressure plate extends and is inserted into the pressure plate fixing groove 212 to lock the half bearing shell 21 onto the bearing housing 1.

[0030] Reference Appendix Figure 6 and Figure 8 This embodiment relates to the positioning and fastening structure of the half-bearing shell 21 within the mounting cavity. To prevent axial movement or circumferential rotation of the half-bearing shell 21 during shaft operation, a pressure plate fixing groove 212 is specially machined on the end face of the copper bushing of the half-bearing shell 21. Correspondingly, a half-bearing shell fixing pressure plate is installed inside the bearing housing 1. During assembly, the technician first places the half-bearing shell 21 into the bearing housing, and then bolts the half-bearing shell fixing pressure plate onto the housing, so that its lip portion precisely engages with the pressure plate fixing groove 212 of the half-bearing shell 21. This structural design not only achieves reliable locking of the half-bearing shell 21 and ensures operational stability, but also greatly simplifies the maintenance process: when it is necessary to replace a worn half-bearing shell 21, the old shell can be easily removed simply by disassembling the pressure plate bolts, without the need for complex pulling tools, fully embodying the design concept of "simple structure, low cost, and convenient replacement of vulnerable parts".

[0031] Reference Appendix Figure 4 , Figure 7 and Figure 8 In one embodiment, the sliding assembly 2 further includes a pair of semi-annular side grinding plates 22 mounted on the two side walls of the mounting cavity. The semi-annular side grinding plates 22 are not complete semi-annular structures. A gap is left at the joint of the pair of semi-annular side grinding plates 22 after they are joined together. The gap is configured as a lubricating oil flow channel so that the lubricating oil can flow out and lubricate the semi-annular side grinding plates 22.

[0032] Reference Appendix Figure 7 and Figure 8 This embodiment optimizes the side lubrication of the sliding assembly 2. Semi-annular side grinding plates 22 are installed on both side walls of the mounting cavity. Specifically, these two semi-annular side grinding plates 22 are designed as "incomplete semi-annular" structures, meaning their central angle is slightly less than 180 degrees, or by removing part of the end material, a pre-reserved gap is naturally formed at the joint (i.e., near the horizontal parting surface) when the upper and lower side grinding plates are joined. The technical effect of this gap is crucial; it is not merely a tolerance allowance but also a channel for lubricating oil flow. Lubricating oil flowing over the bearing surface can smoothly flow out through this gap and cover the side grinding plate surface, ensuring sufficient lubrication between the side grinding plate and the shaft shoulder, and preventing side dry friction burn-off caused by oil blockage or flow interruption.

[0033] Reference Appendix Figure 4 , Figure 5 and Figure 6 In one embodiment, both the semi-shaft bearing 21 and the semi-annular side grinding plate 22 adopt a composite structure, including a copper substrate and an alloy layer fused to the surface of the copper substrate. The surface of the copper substrate of the semi-shaft bearing 21 is machined with an inner groove 211, and the surface of the semi-annular side grinding plate 22 is machined with a dovetail groove 221. The alloy layer is attached to the copper substrate through the inner groove 211 and the dovetail groove 221.

[0034] Reference Appendix Figure 4 and Figure 5 This embodiment illustrates the material processing and structural optimization of the core wear-resistant components in the sliding assembly 2. Both the semi-shaft bearing 21 and the semi-ring side grinding plate 22 abandon the traditional integral casting process and instead adopt a "single-piece inverted" composite structure design. That is, the copper liner of the semi-shaft bearing 21 serves as the substrate, and a high-performance alloy layer is fused onto its surface. To address the problem of insufficient bonding between different materials, an inner groove 211 and a dovetail groove 221 are pre-machined on the surface of the copper liner substrate. The wear-resistant alloy fills the inner groove 211 and dovetail groove 221 in a molten state, forming a strong mechanical interlock after cooling. This greatly improves the adhesion of the fused layer and prevents it from falling off under heavy loads.

[0035] Reference Appendix Figure 6 Based on this, this embodiment also makes two key improvements to the geometry of the half-bearing bush 21: First, an "over-cut inner hole" process is adopted in the machining of the inner hole of the half-bearing bush 21. This design is not only to match the shaft diameter, but more importantly, it significantly improves the oil intake at the bush mating clearance, ensuring that the lubricating oil can enter the friction pair area more smoothly. Second, a "pressure plate fixing groove 212" is designed at the end of the copper bushing of the half-bearing bush 21. This groove is configured to cooperate with the half-bearing bush fixing pressure plate, making the positioning and fixing of the half-bearing bush 21 in the mounting cavity more convenient and stable. This simple and cost-effective design not only reduces the manufacturing cost of the product, but also makes it extremely convenient to replace the vulnerable parts (half-bearing bush 21) in the later stage. Users do not need to replace the entire bearing housing, but only need to replace the worn plate components, which greatly reduces maintenance costs and downtime.

[0036] Reference Appendix Figure 8 and Figure 9 In one embodiment, the bearing housing assembly further includes a support component 5 for supporting the bearing housing in a non-operating state to protect the sealing structure. The support component 5 includes an oil receiving box 51 disposed at the end of the bearing housing. The upper part of the oil receiving box 51 has a groove, and a support half-ring 52 is installed in the groove. The support half-ring 52 is fixed by a half-ring support key. The support half-ring 52 is configured to support the drive shaft in a transport or stationary state when the drive shaft is not running, so as to maintain the gap between the sealing structure and the side grinding plate and the drive shaft.

[0037] Reference Appendix Figure 8and Figure 9 This embodiment primarily addresses the sealing protection issue during non-operational states. Due to the oil film gap between the half-bearing shell 21 and the shaft, the heavy bearing housing 1 will naturally sink under gravity during transportation or when the machine is stationary, causing the bearing housing to "hang" on the drive shaft. This will compress the bottom sealing structure and side grinding plate, resulting in permanent deformation or damage. The supporting half-ring 52 is specifically designed to support the weight of the bearing housing at this time, acting as a "jack" to forcibly maintain a safe clearance between the seal and the shaft, ensuring that the sealing performance remains intact after long-term shutdown or long-distance transportation.

[0038] Reference Appendix Figure 9 In one embodiment, the support assembly 5 further includes a pressure cover oil box 53, which is installed on the axial outside of the sealing structure. The bottom of the pressure cover oil box 53 is provided with an oil drain hole 531 for collecting and draining lubricating oil leaked due to the failure of the sealing structure. Multiple oil drain holes 531 are provided along the height direction to adapt to the return oil height of different shaft arrangements.

[0039] Reference Appendix Figure 9 This embodiment provides a dual leak-proof mechanism. The oil collection box 51 in the support assembly 5 also integrates the function of the pressure cap oil box 53, which is installed on the outside of the sealing structure. Considering that rubber seals inevitably age and fail after long-term use, the pressure cap oil box 53, as a second line of defense, can collect the lubricating oil leaking from the main seal and guide it back to the oil tank through the oil drain hole 531 at the bottom. The pressure cap oil box 53 is also designed with oil drain holes 531 at different heights, which allows technicians to flexibly select the height of the return port according to the layout of the pipeline on site (unused holes can be plugged), which not only facilitates on-site installation but also ensures smooth oil return and avoids oil overflow and environmental pollution.

[0040] Reference Appendix Figure 1 , Figure 2 and Figure 8 In one embodiment, the lubrication assembly 3 includes: a main oil inlet 31, which is located at the top center of the upper bearing housing 11, for injecting lubricating oil into the main bearing area of ​​the sliding assembly 2 in the mounting cavity; and a secondary oil inlet 32, which is located on both side walls of the upper bearing housing 11, the secondary oil inlet 32 ​​being positioned corresponding to the side area of ​​the sliding assembly 2, for assisting in oil intake or for flushing and lubricating the side grinding plate.

[0041] Reference Appendix Figure 1 and Figure 2This embodiment specifically illustrates the layout of the lubrication assembly 3. A main oil inlet 31 is formed at the top center of the upper bearing housing 11 to directly inject pressurized thin oil into the top area of ​​the sliding assembly 2 where it bears the greatest load, ensuring the establishment of a stable load-bearing oil film. Simultaneously, secondary oil inlets 32 are additionally formed on the side walls of the upper bearing housing 11, corresponding to the side areas of the sliding assembly 2. This "one main, multiple secondary" oil inlet layout has significant technical advantages: the main inlet is responsible for load-bearing lubrication, while the secondary inlets serve to assist in oil intake and flushing / cooling. Especially under high-speed or heavy-load conditions, the cold oil introduced by the secondary oil inlets 32 can effectively remove the heat generated by the side grinding plates and flush away wear-generated particles, further extending the service life of the bearing bush.

[0042] Reference Appendix Figure 1 and Figure 8 In one embodiment, the lubrication assembly 3 further includes a venting mechanism 33, which is disposed on the top of the upper bearing housing 11 and communicates with the mounting cavity. The venting mechanism 33 is used to balance the air pressure in the mounting cavity and prevent air resistance from affecting the oil inlet.

[0043] Reference Appendix Figure 1 and Figure 8 This embodiment relates to the air pressure balance design of the lubrication system. The lubrication assembly 3 also includes a venting mechanism 33 disposed on the top of the upper bearing housing 11, which is directly connected to the internal mounting cavity. During thin oil lubrication, pressure fluctuations can easily occur in the cavity due to the rapid flow of oil and temperature changes. If air resistance (high pressure) forms in the cavity, it will hinder the injection of lubricating oil; if negative pressure forms, it may draw in external dust. The function of the venting mechanism 33 is to balance the air pressure inside and outside the cavity in real time, ensuring that the lubricating oil can smoothly enter through the oil inlet and flow out through the oil outlet 531, preventing lubrication interruption due to air pressure problems or sealing failure caused by the "breathing effect".

[0044] An embodiment of the present invention also provides a universal coupling, including the aforementioned bracket bearing housing assembly. Due to the adoption of the aforementioned series of improved structures (including split-type maintenance, cross-clamp positioning, thin oil circulating lubrication, and support protection), the overall reliability of this universal coupling under harsh working conditions such as steel rolling has achieved a qualitative leap. It not only ensures the transmission accuracy of the coupling and improves the quality of rolled materials, but also significantly reduces unplanned downtime caused by bearing damage, thereby significantly improving the overall economic benefits of the production line.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A bracket bearing housing assembly, characterized in that, include: The split bearing housing (1) includes an upper bearing housing (11) and a lower bearing housing (12) that are detachably connected, wherein the upper bearing housing (11) and the lower bearing housing (12) are fastened together to form an installation cavity; A sliding assembly (2) disposed within the mounting cavity includes a pair of half-bearing bushes (21); A lubrication assembly (3) is disposed on the bearing housing (1) for lubricating the sliding assembly (2) with thin oil; And a sealing structure, which is provided at both axial ends of the bearing housing (1); The mating surfaces of the upper bearing seat (11) and the lower bearing seat (12) are fitted and positioned using a ferrule structure to limit the relative displacement of the upper bearing seat (11) and the lower bearing seat (12) in the axial and radial directions.

2. The bracket bearing housing assembly according to claim 1, characterized in that, The ferrule structure includes a protrusion (13) and a corresponding slot. The protrusion (13) is disposed on one of the upper bearing seat (11) or the lower bearing seat (12), and the slot is disposed on the other of the upper bearing seat (11) or the lower bearing seat (12). The slot is formed by a pair of vertical columns (14) arranged in the vertical direction. The distance between the pair of columns (14) is adapted to the width of the protrusion (13) so that the protrusion (13) can be positioned and inserted into the slot when the upper bearing seat (11) and the lower bearing seat (12) are installed.

3. The bracket bearing housing assembly according to claim 2, characterized in that, The protrusion (13) is provided with a through hole, and the bottom surface of the slot is provided with a bolt hole corresponding to the through hole. The through hole and the bolt hole are matched to allow bolts to be inserted to fix the upper bearing seat (11) and the lower bearing seat (12).

4. The bracket bearing housing assembly according to claim 1, characterized in that, The sliding assembly (2) also includes a pair of semi-annular side grinding plates (22) installed on the two side walls of the mounting cavity. The semi-annular side grinding plates (22) are not complete semi-annular structures. A gap is left at the joint of the pair of semi-annular side grinding plates (22). The gap is configured as a lubricating oil flow channel so that the lubricating oil can flow out and lubricate the semi-annular side grinding plates (22).

5. The bracket bearing housing assembly according to claim 4, characterized in that, The half-shaft bearing (21) and the semi-annular side grinding plate (22) both adopt a composite structure, including a copper substrate and an alloy layer fused to the surface of the copper substrate. The surface of the copper substrate of the half-shaft bearing (21) is machined with an inner groove (211), and the surface of the semi-annular side grinding plate (22) is machined with a dovetail groove (221). The alloy layer is attached to the copper substrate through the inner groove (211) and the dovetail groove (221).

6. The bracket bearing housing assembly according to claim 1, characterized in that, The bearing housing assembly also includes a support component (5) for supporting the bearing housing in a non-working state to protect the sealing structure. The support component (5) includes an oil receiving box (51) disposed at the end of the bearing housing. The upper part of the oil receiving box (51) has a groove, and a support half ring (52) is installed in the groove. The support half ring (52) is fixed by a half ring support key. The support half ring (52) is configured to support the drive shaft in a non-operating state to maintain the gap between the sealing structure and the side grinding plate and the drive shaft.

7. The bracket bearing housing assembly according to claim 6, characterized in that, The support assembly (5) also includes a pressure cover oil box (53), which is installed on the axial outside of the sealing structure. The bottom of the pressure cover oil box (53) is provided with an oil drain hole (531) for collecting and draining lubricating oil leaked due to the failure of the sealing structure. Multiple oil drain holes (531) are provided along the height direction to adapt to the return oil height of different shaft arrangements.

8. The bracket bearing housing assembly according to claim 1, characterized in that, The lubrication assembly (3) includes: The main oil inlet (31) is located at the top center of the upper bearing housing (11) and is used to inject lubricating oil into the main bearing area of ​​the sliding assembly (2) in the mounting cavity. A secondary oil inlet hole (32) is provided on both sides of the upper bearing seat (11). The position of the secondary oil inlet hole (32) corresponds to the side area of ​​the sliding assembly (2) and is used to assist in oil intake or to flush and lubricate the side grinding plate.

9. The bracket bearing housing assembly according to claim 8, characterized in that, The lubrication assembly (3) further includes a venting mechanism (33), which is located on the top of the upper bearing seat (11) and communicates with the mounting cavity. The venting mechanism (33) is used to balance the air pressure in the mounting cavity and prevent air resistance from affecting the oil inlet.

10. The bracket bearing housing assembly according to claim 1, characterized in that, The end of the half bearing shell (21) is provided with a pressure plate fixing groove (212). The inner wall of the mounting cavity is detachably connected to the half bearing shell fixing pressure plate by fasteners. The end of the half bearing shell fixing pressure plate extends and is inserted into the pressure plate fixing groove (212) to lock the half bearing shell (21) on the bearing housing (1).

11. A universal coupling, characterized in that, The bracket bearing housing assembly includes any one of claims 1-10.

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