Split bearing with special structure for main shaft of coal mine mechanical equipment

Abstract

The application discloses a split bearing with special structure for a main shaft of a coal mine mechanical equipment, which comprises a bearing outer ring and a bearing inner ring, the bearing inner ring is arranged on the inner side of the bearing outer ring, hollow rollers and two half pillar type retainer rings are further arranged between the bearing outer ring and the bearing inner ring, the bearing outer ring comprises an upper half bearing outer ring and a lower half bearing outer ring, the bearing inner ring comprises an upper half bearing inner ring and a lower half bearing inner ring, copper bushings are inlaid in the hollow rollers, and the two half pillar type retainer rings comprise pillars, two half retainer ring copper gaskets and two half retainer ring steel gaskets. The application adopts the steel-to-copper contact at the rotating parts in the bearing, can effectively reduce the friction heat of the bearing in high-speed rotation, can reduce the safety hidden danger of the split bearing in the working environment with high coal mine dust concentration, greatly improves the working safety coefficient, improves the production efficiency and brings benefits to enterprises.

Description

Technical Field

[0001] The invention belongs to the technical field of bearings, and mainly relates to a split bearing with a special structure for a main shaft of coal mine mechanical equipment. Background Art

[0002] At present, in the application of large-scale coal mine machinery and equipment, due to the restrictions on space and environmental conditions for the installation and removal of bearings, the installation site is compact and the bearing installation is often arranged after the main shaft. The bearing installation position is restricted and the equipment itself has the limitation of not being able to be shut down frequently, resulting in the inability to directly replace and assemble ordinary bearings. Therefore, split bearings are often used at both ends of the main shaft. Due to the small size and compact structure of split bearings, when mechanical equipment encounters special working conditions, the installation site is restricted and the limitations of the equipment itself make it impossible to assemble or the space is small, split bearings can be used for direct installation. However, this bearing is required to operate for a long time under high load and high speed conditions, and the operating environment conditions are harsh. When the coal mine dust reaches a certain concentration, it is very easy to cause an explosion under high temperature and humid conditions.

[0003] Chinese utility model patent: 201820209109.X discloses a split bearing for mining machinery, including a base frame, a bearing seat, a coupling, a balance plate, a gear ring, a dust ring, a groove, a guide wheel, a bearing, and a bearing box. Rectangular notches are fixedly provided on the left and right sides of the top cross-section of the base frame, a bearing seat is fixedly welded to the center of the top cross-section, and the left and right edges of the bearing seat are fixedly protruded outward in a rectangular shape; the rotating part of the internal design of its bearing structure is steel-to-steel contact. When the bearing runs at high speed, it is very easy to generate friction and heat, and even sparks. Working in an environment where coal mine dust reaches a certain concentration is prone to explosion, creating a safety hazard. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a split bearing with a special structure for the main shaft of coal mine machinery and equipment, so as to solve the problem that the split bearings on large coal mine machinery and equipment are prone to friction and heat when working in an environment with high coal mine dust concentration, which in turn leads to high safety hazards.

[0005] To achieve the purpose of the present invention, the technical solutions adopted are as follows:

[0006] A split bearing for the main shaft of coal mining machinery equipment with a special structure includes a bearing outer ring and a bearing inner ring, the bearing inner ring is arranged on the inner side of the bearing outer ring; a hollow roller and two-half pillar-type retaining frame are also arranged between the bearing outer ring and the bearing inner ring; the bearing outer ring includes an upper half bearing outer ring and a lower half bearing outer ring; the bearing inner ring includes an upper half bearing inner ring and a lower half bearing inner ring; the interior of the hollow roller is inlaid with a copper bushing; the two-half pillar-type retaining frame includes a pillar, two half retaining copper washers and two half retaining The pillar passes through the copper bushing inside the hollow roller and is welded to the two halves of the retaining frame copper washers and the two halves of the retaining frame steel washers on both sides; the two halves of the retaining frame copper washers are arranged on the inner side of the two halves of the retaining frame steel washers, and the two halves of the retaining frame copper washers and the two halves of the retaining frame steel washers are riveted and fixed with copper rivets, and the two halves of the pillar-type retaining frame are connected by a copper connecting plate and a screw A; the left and right sides of the bearing inner ring are respectively provided with an upper half fastening ring A and a lower half fastening ring A, and the other side is provided with an upper half fastening ring B and a lower half fastening ring B.

[0007] The upper half bearing outer ring has a double rib A structure. The split cut A on one side of the double rib A is ∨-shaped, and the split cut B on the other side is ∧-shaped. Both split cuts A and B form an angle α with the centerline. The outer diameter A of the upper half bearing outer ring is provided with a grease injection hole and a threaded hole A for connection to the bearing housing. The lower half bearing outer ring has a double rib B structure. The split cut C on one side of the double rib B is ∨-shaped and aligned with split cut A of the upper half bearing outer ring. The split cut D on the other side is ∧-shaped and aligned with split cut B on the other side of the upper half bearing outer ring. Both split cuts C and D form an angle β with the centerline. The outer diameter B of the lower half bearing outer ring is provided with a threaded hole B for connection to the bearing housing. The top of the upper half bearing inner ring and the lower half bearing inner ring are both provided with a double rib C structure, and a split cut E and a split cut F are respectively provided on the bottom section; the double rib C is provided with a lifting hole A and a lifting hole B on both sides.

[0008] The split cuts E and F are oblique straight lines to each other in an "X" shape, and the angles between the oblique straight lines and the center line are both γ; the inner diameter A positions of the split cuts E and F are provided with installation guide surfaces A and guide surfaces B; the clearance value between the inner ring of the upper half bearing and the inner ring of the lower half bearing after installation is 0.4 to 0.5 mm.

[0009] The outer diameter C surface of the hollow roller is a fully convex design, with a through hole A processed inside. Countersunk holes A and countersunk holes B are processed at both ends of the through hole A. Copper bushings are embedded in the countersunk holes A and countersunk holes B, and the countersunk holes A and countersunk holes B are interference fit with the copper bushings.

[0010] The outer diameter D of the copper bushing is interference fit with the countersunk holes A and B at both ends of the hollow roller, and the inner diameter B of the copper bushing is smaller than the diameter of the through hole A of the hollow roller; ensuring that the copper bushing contacts the pillar when the hollow roller rotates, and the through hole A of the hollow roller does not contact the pillar.

[0011] A stepped stop A is provided on the outer diameter E of the two halves of the retaining frame copper washers, and a welding hole A and a rivet hole A are respectively provided on the end faces of both sides of the two halves of the retaining frame copper washers; a stepped stop B is provided on the outer diameter F of the two halves of the retaining frame steel washers, and a welding hole B and a rivet hole B are respectively provided on the end faces of both sides of the two halves of the retaining frame steel washers; the stop A and the stop B are adapted to each other.

[0012] The top surfaces of both ends of the copper washers of the two half retainers are provided with threaded holes C for the copper connecting plates; the top surfaces of both ends of the steel washers of the two half retainers are provided with threaded holes D for the copper connecting plates.

[0013] The inner diameter C of the upper fastening ring A matches the outer diameter A of the step of the inner ring of the bearing, and its outer diameter G is provided with a lifting hole E, and a connecting threaded hole E is provided at the incision. The distance between the incision position of the upper fastening ring on one side and the center line is δ, and the δ value is 2mm; the inner diameter D of the lower fastening ring A matches the outer diameter A of the step of the inner ring of the bearing, and its outer diameter H is provided with a lifting hole F and a countersunk hole C, and a connecting through hole C is provided at the incision. The distance between the incision position of the lower fastening ring on one side and the center line is δ; the upper fastening ring A and the lower fastening ring A are connected by screws B provided thereon.

[0014] The upper half fastening ring B is a built-in step ring structure, and the inner diameter F of the upper part of the inner step is clearance-matched with the outer diameter of the small rib of the inner ring of the bearing, and the inner diameter E of the lower part of the inner step is matched with the outer diameter B of the step of the inner ring of the bearing. A lifting hole G is also provided on the outer diameter I surface of the upper half fastening ring B, and a connecting threaded hole F is provided at the end face cut; the cut position of the upper half fastening ring B is at a distance δ from the center line.

[0015] The structure of the lower half fastening ring B is the same as that of the upper half fastening ring B. The inner diameter G of the lower part of its inner step is matched with the outer diameter B of the step of the inner ring of the bearing, and the inner diameter H of the upper part of its inner step is a clearance fit with the outer diameter of the small rib of the inner ring of the bearing; the outer diameter J surface of the lower half fastening ring B is provided with a lifting hole H and a countersunk hole D, and the end face cut is provided with a connecting through hole D; the cut position of the lower half fastening ring B is at a distance δ from the center line, and the δ value is 2mm; the upper half fastening ring B and the lower half fastening ring B are connected by screws C provided thereon.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By inserting copper bushings at both ends of the hollow roller of the split bearing, the copper bushings and the pillars come into contact when the rollers rotate, thus avoiding steel-to-steel contact between the rollers and the pillars;

[0018] 2. A copper washer is arranged on the inside of the cage. When the hollow roller rotates, both ends of the roller contact the copper washer of the cage, avoiding steel-to-steel contact between the roller and the cage.

[0019] 3. After the two halves of the cage are installed, they are connected and fixed with a copper connecting plate to ensure the rotation consistency of the two halves of the cage and avoid contact friction or even collision at the interface of the two halves of the support cage when the bearing is running.

[0020] The above improvements have been made to the structure of the split bearing. The structure is easy to install and disassemble, compact, and can withstand both radial loads and axial loads and overturning moments. It has a long service life and high reliability. At the same time, the structure enables the internal rotating parts of the bearing to adopt steel-to-copper contact, which can effectively reduce friction and heat generation when the bearing rotates at high speeds. This allows the split bearing to work in an environment with high dust concentration in coal mines, reducing safety hazards, greatly improving the work safety factor, and at the same time improving production efficiency, bringing benefits to the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 yes Figure 1 side view.

[0023] Figure 3 This is a schematic diagram of the structure of the outer ring of the upper bearing.

[0024] Figure 4 yes Figure 3 side view.

[0025] Figure 5 It is a schematic diagram of the structure of the outer ring of the lower half bearing.

[0026] Figure 6 yes Figure 5 side view.

[0027] Figure 7 It is a schematic diagram of the structure of the upper bearing inner ring and the lower bearing inner ring.

[0028] Figure 8 yes Figure 7 side view.

[0029] Figure 9 It is a schematic diagram of the hollow roller structure.

[0030] Figure 10 It is a schematic diagram of the copper bushing structure.

[0031] Figure 11 It is a schematic diagram of the structure of the copper washers of the two halves of the cage.

[0032] Figure 12 yes Figure 11 side view.

[0033] Figure 13 It is a schematic diagram of the structure of the two half cage steel washers.

[0034] Figure 14 yes Figure 13 side view.

[0035] Figure 15 It is a schematic diagram of the copper connecting plate structure.

[0036] Figure 16 It is a schematic diagram of the structure of the upper half fastening ring on one side.

[0037] Figure 17 yes Figure 16 side view.

[0038] Figure 18 This is a schematic diagram of the structure of the lower half fastening ring on one side.

[0039] Figure 19 yes Figure 18 side view.

[0040] Figure 20 It is a schematic diagram of the structure of the upper half of the fastening ring on the other side.

[0041] Figure 21 yes Figure 20 side view.

[0042] Figure 22 It is a schematic diagram of the structure of the lower half fastening circle on the other side.

[0043] Figure 23 yes Figure 22 side view.

[0044] In the figure: 1. Upper bearing outer ring, 2. Lower bearing outer ring, 3. Upper bearing inner ring, 4. Lower bearing inner ring, 5. Hollow roller, 6. Copper bushing, 7. Pillar, 8. Copper washers of two cage halves, 9. Steel washers of two cage halves, 10. Copper rivet, 11. Copper connecting plate, 12. Screw A, 13. Upper fastening ring A, 14. Lower fastening ring A, 15. Upper fastening ring B, 16. Lower fastening ring B, 17. Screw B, 18. Screw C, 1 9. Double rib A, 20. Split cut A, 21. Split cut B, 22. Outer diameter A, 23. Grease injection hole, 24. Threaded hole A, 25. Double rib B, 26. Split cut C, 27. Split cut D, 28. Outer diameter B, 29. Threaded hole B, 30. Double rib C, 31. Lifting hole A, 311. Step outer diameter A, 32. Lifting hole B, 321. Step outer diameter B, 322. Small rib outer diameter, 33. Split cut E, 34. Split cut 35. Inner diameter A, 36. Guide surface A, 37. Guide surface B, 38. Outer diameter C, 39. Through hole A, 40. Countersunk hole A, 41. Countersunk hole B, 42. Outer diameter D, 43. Inner diameter B, 44. Outer diameter E, 45. Stopper A, 46. Rivet hole A, 47. Welding hole A, 48. Lifting hole C, 49. Threaded hole C, 50. Outer diameter F, 51. Stopper B, 52. Rivet hole B, 53. Welding hole B, 54. Lifting hole D, 55. Screw hole Hole D, 56, through hole B, 57, inner diameter C, 58, outer diameter G, 59, lifting hole E, 60, threaded hole E, 61, inner diameter D, 62, outer diameter H, 63, lifting hole F, 64, countersunk hole C, 65, through hole C, 66, inner diameter E, 67, inner diameter F, 68, outer diameter I, 69, lifting hole G, 70, threaded hole F, 71, inner diameter G, 72, inner diameter H, 73, outer diameter J, 74, lifting hole H, 75, countersunk hole D, 76, through hole D. DETAILED DESCRIPTION

[0045] The present invention is described with reference to the accompanying drawings.

[0046] like Figure 1-Figure 23The split bearing for the main shaft of coal mining machinery equipment with a special structure shown in the figure includes a bearing outer ring and a bearing inner ring, and the bearing inner ring is arranged on the inner side of the bearing outer ring; a hollow roller 5 and a two-part pillar-type retainer are also arranged between the bearing outer ring and the bearing inner ring; the bearing outer ring includes an upper half bearing outer ring 1 and a lower half bearing outer ring 2; the bearing inner ring includes an upper half bearing inner ring 3 and a lower half bearing inner ring 4; a copper bushing 6 is embedded in the interior of the hollow roller 5; the two-part pillar-type retainer includes a pillar 7, two-part copper washers 8 and two-part steel washers 9; the pillar 7 passes through the copper bushing 6 inside the hollow roller 5 and the copper washers 8 and the two-part steel washers on both sides of the retainer. The washer 9 is welded; the two half retainer copper washers 8 are arranged on the inner side of the two half retainer steel washers 9, the two half retainer copper washers 8 and the two half retainer steel washers 9 are riveted and fixed with copper rivets 10, and the two half pillar-type retainers are connected by copper connecting plates 11 and screws A12; the copper rivets 10 pass through the two half retainer copper washers 8, rivet holes A46 and the two half retainer steel washers 9, rivet holes B52 to rivet them together; the left and right sides of the bearing inner ring are respectively provided with an upper half fastening ring A13 and a lower half fastening ring A14, and the other side is provided with an upper half fastening ring B15 and a lower half fastening ring B16, and the bearing inner ring can be fixed to the main shaft of the equipment through the fastening rings. The upper half bearing outer ring 1 has a double rib A19 structure, and the split cut A20 on one side of the double rib A19 is a "∨" type, and the split cut B21 on the other side is a "∧" type; the split cut A20 and the split cut B21 are both at an angle α with the center line, and the preferred angle α is equal to 10°; the outer diameter A22 of the upper half bearing outer ring 1 is provided with a grease injection hole 23 and a threaded hole A24 for connecting to the bearing box. The lower half bearing outer ring 2 has a double rib B25 structure, and the split cut C26 on one side of the double rib B25 is a "∨" type and is aligned with the split cut A20 of the upper half bearing outer ring 1, and the split cut D27 on the other side is a "∧" type and is aligned with the split cut B21 on the other side of the upper half bearing outer ring 1; the split cut C26 and the split cut D27 are both angles β with the center line, and the preferred angle β is equal to 10°; a threaded hole B29 for connecting to the bearing box is provided on the outer diameter B28 of the lower half bearing outer ring 2; the upper half bearing inner ring 3 and the lower half bearing inner ring 4 have a double rib C30 structure on their tops, and split cuts E33 and split cuts F34 are respectively provided on their bottom sections; lifting holes A31 and lifting holes B32 are arranged on both sides of the double rib C30.

[0047] The splitting notch E33 and the splitting notch F34 are mutually oblique straight lines, forming an "X" shape, and the angle between the oblique straight lines and the center line is γ, and the preferred angle γ is equal to 6°; the setting of the angles α, β and γ can prevent the two halves of the outer ring and the two halves of the inner ring from axial movement; the inner diameter A35 position of the splitting notch E33 and the splitting notch F34 is provided with a mounting guide surface A36 and a guide surface B37; the clearance between the upper half bearing inner ring 3 and the lower half bearing inner ring 4 after installation is The value is 0.4-0.5mm. A gap is left at the split cut between the two halves of the inner ring of the bearing to ensure that there is no gap between the inner diameter of the inner ring and the main shaft after installation, ensuring a more secure fixation. The outer diameter C38 of the hollow roller 5 is a fully convex surface with a through hole A39 machined inside. Counterbores A40 and B41 are machined at both ends of through hole A39. Copper bushings 6 are inserted into counterbores A40 and B41, and the counterbores A40 and B41 have an interference fit with the copper bushings 6. The outer diameter D42 of the copper bushing 6 has an interference fit with the counterbores A40 and B41 at both ends of the hollow roller. The inner diameter B43 of the copper bushing 6 is smaller than the diameter of the through hole A39 of the hollow roller. The support 7 passes through the copper bushing 6 and through hole A39 at both ends of the hollow roller 5, ensuring that the copper bushing 6 contacts the support 7 when the hollow roller 5 rotates, while the through hole A39 of the hollow roller 5 does not contact the support 7.

[0048] The top surfaces of both ends of the copper washer 8 retainer halves are provided with threaded holes C49 for the copper connecting plate 11. The top surfaces of both ends of the steel washer 9 retainer halves are provided with threaded holes D55 for the copper connecting plate 11. The end surfaces of the copper connecting plate 11 are provided with connecting through-holes B56, and the two halves of the pillar retainer are connected together via screws A12. A stepped stop A45 is provided on the outer diameter E44 of the copper washer 8 retainer halves, and welding holes A47 and rivet holes A46 are provided on both side end surfaces of the copper washer 8 retainer halves. A stepped stop B51 is provided on the outer diameter F50 of the steel washer 9 retainer halves, and welding holes B53 and rivet holes B52 are provided on both side end surfaces of the steel washer 9 retainer halves. The stop A45 and stop B51 are mutually compatible, and the rivet holes A46 and rivet holes B52 are mutually compatible. The end faces of the retainer steel washers 9 are also equipped with lifting holes C48, which mate with the lifting holes D54 on the two retainer steel washer halves 9 and are used for lifting the bearing. The two retainer steel washers 9 are also equipped with rivet holes B52 on their ends for connecting with the two retainer copper washers 8. These rivet holes B52 mate with the rivet holes A46 on the two retainer copper washers 8. The end faces also have welding holes B53 for mating with the support posts 7. These welding holes B53 mate with the welding holes A47.

[0049] The inner diameter C57 of the upper fastening ring A13 matches the outer diameter A311 of the bearing inner ring step, and its outer diameter G58 is provided with a lifting hole E59, and a connecting threaded hole E60 is provided at the cut. The distance between the cut position of the upper fastening ring 13 on one side and the center line is δ, and the δ value is 2mm; the inner diameter D61 of the lower fastening ring A14 matches the outer diameter A311 of the bearing inner ring step, and its outer diameter H62 is provided with a lifting hole F63 and a countersunk hole C64, and a connecting through hole C65 is provided at the cut. The distance between the cut position of the lower fastening ring 14 on one side and the center line is δ, and the δ value is 2mm; the upper fastening ring A13 and the lower fastening ring A14 are connected by screws B17 arranged thereon; the upper fastening ring B15 is a built-in step ring structure, the inner diameter F67 of the upper part of the inner step is clearance-matched with the outer diameter of the small rib of the inner ring of the bearing, and the inner diameter E66 of the lower part of the inner step is matched with the outer diameter B321 of the step of the inner ring of the bearing. A lifting hole G69 is also provided on the outer diameter I68 surface of the upper fastening ring B15, and a connecting threaded hole F70 is provided at the end face cut; the cut position of the upper fastening ring B15 is at a distance δ from the center line, and the preferred δ is 2mm. The structure of the lower half fastening ring B16 is the same as that of the upper half fastening ring B15. The inner diameter G71 at the lower part of its inner step cooperates with the outer diameter B321 of the bearing inner ring step, and the inner diameter H72 at the upper part of its inner step has a clearance fit with the outer diameter 322 of the small rib of the bearing inner ring; a lifting hole H74 and a countersunk hole D75 are provided on the outer diameter J73 surface of the lower half fastening ring B15, and a connecting through hole D76 is provided at the end face cut; the cut position of the lower half fastening ring B16 is at a distance δ from the center line, and the preferred δ is 2mm; a 2mm gap is set at the cuts of the two half fastening rings to ensure that after the two half fastening rings and the bearing inner ring are installed and fixed, the inner diameter of the fastening ring and the outer diameter of the small rib of the bearing are matched without gap, and the fixation is more secure; the upper half fastening ring B15 and the lower half fastening ring B16 are connected by screws C18 set thereon.

[0050] When the present invention is in use, copper bushings 6 are embedded in both ends of the hollow roller 5 so that the copper bushings 6 and the pillars 7 are in contact when the rollers rotate, thereby avoiding steel-to-steel contact between the rollers and the pillars 7; at the same time, copper washers 8 are arranged on the inner side of the retaining frame, and both ends of the hollow roller 5 are in contact with the copper washers 8 of the retaining frame when the hollow roller 5 rotates, thereby avoiding steel-to-steel contact between the rollers and the retaining frame; and after the two halves of the retaining frame are installed, they are connected and fixed with a copper connecting plate 11 to ensure the rotation consistency of the two halves of the retaining frame, thereby avoiding contact friction and even collision at the interface of the two halves of the pillar retaining frame when the bearing is running, thereby reducing the heat generated by the bearing when running at high speed; that is, it solves the problem in the prior art that the rotating part of the bearing structure is designed to be in steel-to-steel contact, which is very easy to generate friction and heat, and even sparks when the bearing runs at high speed, and is easy to cause explosion when working in an environment where coal mine dust reaches a certain concentration, thereby creating a safety hazard.

[0051] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention within the technical scope disclosed in the present invention, and they should be covered by the scope of protection of the present invention.

Claims

1. A split bearing for the main shaft of coal mining machinery and equipment with a special structure, comprising a bearing outer ring and a bearing inner ring, wherein the bearing inner ring is arranged inside the bearing outer ring; the characteristics are: A hollow roller (5) and two-half pillar-type retaining frames are also provided between the bearing outer ring and the bearing inner ring; the bearing outer ring includes an upper half bearing outer ring (1) and a lower half bearing outer ring (2); the bearing inner ring includes an upper half bearing inner ring (3) and a lower half bearing inner ring (4); a copper bushing (6) is embedded in the interior of the hollow roller (5); the two-half pillar-type retaining frames include a pillar (7), two-half retaining frame copper washers (8) and two-half retaining frame steel washers (9); the pillar (7) passes through the inner copper bushing (6) of the hollow roller (5) and is connected to the two half retaining frames on both sides. The copper washer (8) and the two half retainer steel washers (9) are welded; the two half retainer copper washers (8) are arranged on the inner side of the two half retainer steel washers (9), the two half retainer copper washers (8) and the two half retainer steel washers (9) are riveted and fixed using copper rivets (10), and the two half pillar-type retainers are connected by copper connecting plates (11) and screws A (12); the left and right sides of the bearing inner ring are respectively provided with an upper half fastening ring A (13) and a lower half fastening ring A (14), and the other side is provided with an upper half fastening ring B (15) and a lower half fastening ring B (16); The upper half bearing outer ring (1) is a structure with a double rib A (19), wherein a split cut A (20) on one side of the double rib A (19) is a "∨" type, and a split cut B (21) on the other side is a "∧" type; the angles between the split cut A (20) and the split cut B (21) and the center line are both α; The outer diameter C (38) of the hollow roller (5) is of fully convex design, and a through hole A (39) is machined inside the hollow roller (5). Countersunk holes A (40) and countersunk holes B (41) are machined at both ends of the through hole A (39). Copper bushings (6) are inserted into the countersunk holes A (40) and countersunk holes B (41). The countersunk holes A (40) and countersunk holes B (41) are interference fit with the copper bushings (6).

2. The split bearing for the main shaft of coal mining machinery and equipment with a special structure according to claim 1 is characterized by: The outer diameter A (22) of the upper half bearing outer ring (1) is provided with a grease injection hole (23) and a threaded hole A (24) for connecting with the bearing box; the lower half bearing outer ring (2) is a structure with a double rib B (25), and the split cut C (26) on one side of the double rib B (25) is a "∨" type and is aligned with the split cut A (20) of the upper half bearing outer ring (1), and the split cut D (27) on the other side is a "∧" type and is aligned with the split cut B (21) on the other side of the upper half bearing outer ring (1); the split The angles between the split cut C (26) and the split cut D (27) and the center line are both β; a threaded hole B (29) for connecting to the bearing box is arranged on the outer diameter B (28) of the lower half bearing outer ring (2); the tops of the upper half bearing inner ring (3) and the lower half bearing inner ring (4) are both double-ribbed C (30) structures, and split cuts E (33) and split cuts F (34) are respectively arranged on the bottom sections; and lifting holes A (31) and lifting holes B (32) are arranged on both sides of the double rib C (30).

3. The split bearing for the main shaft of coal mining machinery and equipment with a special structure according to claim 2 is characterized by: The split cut E (33) and the split cut F (34) are mutually oblique straight lines in an "X" shape, and the angles between the oblique straight lines and the center line are both γ; the inner diameter A (35) of the split cut E (33) and the split cut F (34) are provided with a mounting guide surface A (36) and a guide surface B (37); the clearance value between the upper half bearing inner ring (3) and the lower half bearing inner ring (4) after installation is 0.4 to 0.5 mm.

4. The split bearing for the main shaft of coal mining machinery and equipment with a special structure according to claim 1 is characterized by: The outer diameter D (42) of the copper bushing (6) is interference-fitted with the countersunk holes A (40) and the countersunk holes B (41) at both ends of the hollow roller (5), and the inner diameter B (43) of the copper bushing (6) is smaller than the diameter of the through hole A (39) of the hollow roller (5); ensuring that when the hollow roller (5) rotates, the copper bushing (6) contacts the support (7) and the through hole A (39) of the hollow roller (5) does not contact the support (7).

5. The split bearing for the main shaft of coal mining machinery and equipment with a special structure according to claim 1 is characterized by: A stepped stopper A (45) is provided on the outer diameter E (44) of the two half retainer copper washers (8), and a welding hole A (47) and a rivet hole A (46) are respectively provided on the end faces of both sides of the two half retainer copper washers (8); a stepped stopper B (51) is provided on the outer diameter F (50) of the two half retainer steel washers (9), and a welding hole B (53) and a rivet hole B (52) are respectively provided on the end faces of both sides of the two half retainer steel washers (9); the stopper A (45) and the stopper B (51) are adapted to each other; the rivet hole A (46) and the rivet hole B (52) are adapted to each other.

6. The special structure split bearing for the main shaft of coal mining machinery and equipment according to claim 1 is characterized by: The top surfaces of both ends of the two half retainer copper washers (8) are provided with threaded holes C (49) for the copper connecting plate (11); the top surfaces of both ends of the two half retainer steel washers (9) are provided with threaded holes D (55) for the copper connecting plate (11).

7. The split bearing for the main shaft of coal mining machinery and equipment with a special structure according to claim 1 is characterized by: The inner diameter C (57) of the upper half fastening ring A (13) matches the outer diameter A (311) of the bearing inner ring step, and its outer diameter G (58) is provided with a lifting hole E (59), and a connecting threaded hole E (60) is provided at the cutout. The distance between the cutout position of the upper half fastening ring on one side and the center line is δ, and the δ value is 2mm; the inner diameter D (61) of the lower half fastening ring A (14) matches the outer diameter A (311) of the bearing inner ring step, and its outer diameter H (62) is provided with a lifting hole F (63) and a countersunk hole C (64), and a connecting through hole C (65) is provided at the cutout. The distance between the cutout position of the lower half fastening ring on one side and the center line is δ; the upper half fastening ring A (13) and the lower half fastening ring A (14) are connected by screws B (17) provided thereon.

8. The split bearing for the main shaft of coal mining machinery and equipment with a special structure according to claim 1 is characterized by: The upper half fastening ring B (15) is a built-in step ring structure, the inner diameter F (67) at the upper part of the inner step is clearance-matched with the outer diameter (322) of the small rib of the bearing inner ring, and the inner diameter E (66) at the lower part of the inner step is matched with the outer diameter B (321) of the step of the bearing inner ring. A hanging hole G (69) is also provided on the outer diameter I (68) surface of the upper half fastening ring B (15), and a connecting threaded hole F (70) is provided at the end face cut; the cut position of the upper half fastening ring B (15) is at a distance δ from the center line.

9. The split bearing for the main shaft of coal mining machinery and equipment with a special structure according to claim 1 is characterized by: The structure of the lower half fastening ring B (16) is the same as that of the upper half fastening ring B (15), wherein the inner diameter G (71) of the lower part of the inner step is matched with the outer diameter B (321) of the step of the inner ring of the bearing, and the inner diameter H (72) of the upper part of the inner step is clearance matched with the outer diameter (322) of the small rib of the inner ring of the bearing; the outer diameter J (73) of the lower half fastening ring B (16) is provided with a hanging hole H (74) and a countersunk hole D (75), and a connecting through hole D (76) is provided at the end face cut; the cut position of the lower half fastening ring B (16) is at a distance δ from the center line, and the δ value is 2 mm; the upper half fastening ring B (15) and the lower half fastening ring B (16) are connected by screws C (18) provided thereon.

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