Cover pulling method for sealing cover of self-sealing conical bearing

Abstract

The invention discloses a cover pulling method for a sealing cover of a self-sealing conical bearing. The sealing cover is pulled out by adopting a cover pulling tool. The cover pulling tool comprises a base, a positioning block, two screw connecting blocks, a torsion bar, a metal bar and two hexagon socket head bolts. The two sealing cover screws of the sealing cover are sleeved with the two base penetrating holes in the positioning groove of the base in a one-to-one correspondence mode, so that the lower step faces on the two sides of the base make contact with the end face of the bearing outer ring, the two sealing cover screws are sleeved with the two positioning block penetrating holes of the positioning block in a one-to-one correspondence mode, and the positioning block is located in the positioning groove of the base. The two screw connecting blocks are screwed to the two sealing cover screws in a one-to-one correspondence mode, then the stud of the torsion bar is installed in the positioning block threaded through hole of the positioning block, finally the metal bar penetrates through the metal bar penetrating hole of the torsion bar, and the two hexagon socket head bolts are screwed into the two base threaded through holes in a one-to-one correspondence mode. The sealing cover can be simply and conveniently pulled out and is not limited by sites and energy.

Description

Technical Field

[0001] This invention relates to a method for removing the seal cover of a self-sealing tapered bearing. Background Technology

[0002] Bearing seal covers are generally removed using either equipment or manually. Equipment removal is simple and saves time and effort, but the equipment is large and difficult to move, and requires electricity or oil for power. Manual removal using tooling, while more complex and labor-intensive, is easier to move and not limited by time, location, or energy, making it suitable for small-batch removal operations.

[0003] The sealing cover of a typical self-sealing tapered roller bearing is a steel frame with a rubber sheath. It has soft spots on its end face, which can be punctured using a hook-like tool to remove the cover. However, some bearings have a pure metal sealing cover on one side. Its front retaining ring has a square hole with a screw welded to each side. The square hole and screws are for installing a monitoring probe. The sealing cover, together with a magnetic ring located on the inner ring end face of the bearing, forms a sealing assembly. The magnetic ring needs to be reused during subsequent repairs, so damage to this assembly must be avoided during the removal process. This metal sealing cover has no soft spots, making traditional removal methods unsuitable. Therefore, a special removal tool needs to be designed for this purpose. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for removing the seal cover of a self-sealing tapered bearing. This method allows for simple and convenient removal of the seal cover without being limited by location or energy.

[0005] The objective of this invention is achieved as follows: a method for removing a self-sealing tapered bearing seal cover, comprising a magnetic ring connecting sleeve, a front retaining ring connected to the front end of the magnetic ring connecting sleeve, an intermediate sleeve connected to the outer end of the front retaining ring and coaxially located outside the magnetic ring connecting sleeve, a rear retaining ring connected to the rear end of the intermediate sleeve, and an outer ring connecting sleeve connected to the outer end of the rear retaining ring and coaxially located at the rear of the intermediate sleeve; a square hole is formed on the front retaining ring of the seal cover, and a seal cover screw is symmetrically fixed on both sides of the square hole; the outer ring connecting sleeve of the seal cover has an outer diameter protrusion at the rear end of its outer surface that is interference-fitted with the tooth groove on the inner circumferential surface of the bearing outer ring, so that the outer ring connecting sleeve is inserted into the tooth groove of the bearing outer ring through the outer diameter protrusion; a magnetic ring with an axial cross-section of L-shape is provided on the end face of the bearing inner ring, and the magnetic ring connecting sleeve of the seal cover is inserted into the inner circumferential surface of the axial portion of the magnetic ring; The cover-removing fixture includes a base, a positioning block, two screw connecting blocks, a torsion bar, a metal rod, and two internal hexagon head bolts; wherein... The base has a plane that is a circle with a diameter larger than the outer diameter of the bearing outer ring; the bottom edge of the base has a three-step surface that gradually thickens from the inside out; the inner diameter of the upper step matches the outer diameter of the middle sleeve of the sealing cover; the inner diameter of the middle step matches the maximum inner diameter of the bearing outer ring, and the height of the middle step is greater than the height of the middle sleeve of the sealing cover and the height of the outer ring connecting sleeve of the sealing cover; the inner diameter of the lower step matches the outer diameter of the bearing outer ring; two threaded holes are symmetrically opened at the center of the top edge of the base, extending to the bottom surface of the base, and the distance between the centers of the two threaded holes is less than the outer diameter of the bearing outer ring but greater than the maximum inner diameter of the bearing outer ring; a rectangular positioning groove is opened on one side of the top surface of the base, and two base through holes corresponding one-to-one with the two sealing cover screws are opened in the positioning groove; The planar shape and size of the positioning block are the same as the planar shape and size of the positioning groove on the base; a regular square prism is provided in the middle of the top surface of the positioning block, and a positioning block threaded through hole is provided in the regular square prism; a positioning block through hole is opened on each side of the regular square prism. The lower part of the screw connecting block is a cylindrical nut, and the outer diameter of the cylindrical nut is adapted to the diameter of the through hole of the positioning block on the positioning block, and the height of the cylindrical nut is adapted to the height of the positioning block. The upper part of the screw connecting block is a hexagonal nut, and the distance between opposite sides of the hexagon is greater than the outer diameter of the cylindrical nut. The internal thread hole of the cylindrical nut and the internal thread hole of the hexagonal nut are of the same diameter and coaxial. The torsion bar includes a stud that engages with the threaded through hole of the positioning block and a regular hexagonal prism coaxially connected to the top of the stud; the length of the stud is at least the height of the positioning block + the height of the regular square prism + the height of the outer ring connecting sleeve of the sealing cover; a metal rod through hole perpendicular to the stud is opened in the middle of the side of the regular hexagonal prism. The diameter of the metal rod is adapted to the diameter of the hole through the metal rod of the torsion bar; The internal hex head bolt engages with the threaded through hole on the base, and the length of the internal hex head bolt is greater than the height of the threaded through hole on the base. The method for removing the shield according to the present invention includes the following steps: S1. First, fit the two base through holes in the positioning groove of the base onto the two sealing cover screws of the sealing cover one by one, and move the base down along the two sealing cover screws until the lower step surfaces on both sides of the base contact the end face of the outer ring of the bearing, and the height of the two sealing cover screws protruding from the bottom surface of the positioning groove of the base is not less than 4mm. Next, fit the two positioning block through holes of the positioning block onto the two sealing cover screws one by one, and move the positioning block down along the two sealing cover screws until the positioning block sits in the positioning groove of the base. Then, screw the two screw connecting blocks one by one onto the two sealing cover screws until the bottom surface of the cylindrical nut of the two screw connecting blocks contacts the bottom surface of the positioning groove of the base. Then, install the stud of the torsion bar into the positioning block threaded through hole of the positioning block. Finally, insert the metal rod through the metal rod through hole of the torsion bar, and screw the two internal hexagon head bolts one by one into the two base threaded through holes to complete the assembly of the cover removal fixture. S2. Rotate the metal rod horizontally, which drives the stud of the torsion bar to rotate. The stud of the torsion bar rotates downward in the threaded through hole of the positioning block until the bottom surface of the stud of the torsion bar contacts the top surface of the base. Continue to rotate the metal rod. The thread on the stud of the torsion bar will drive the positioning block to move upward along the stud, which in turn will drive the two screw connecting blocks to move upward together. This will cause the two screw connecting blocks to pull up the two sealing cover screws on the sealing cover. Finally, the stud of the torsion bar will drive the sealing cover to move upward as a whole, causing the outer diameter protrusion on the outer ring connecting sleeve of the sealing cover to disengage from the tooth groove of the bearing outer ring. S3. Continue to rotate the two hexagon socket head cap screws that correspond one-to-one in the two threaded through holes of the base, so that the base is lifted upward by the action of the threads of the two hexagon socket head cap screws and the two threaded through holes of the base. The rise of the base drives the positioning block to rise, and finally drives the sealing cover to rise upward until the sealing cover is completely disengaged from the bearing outer ring and the magnetic ring.

[0006] The above-mentioned method for removing the self-sealing tapered bearing seal cover includes a base with a plane that is a circle with a diameter larger than the outer diameter of the bearing outer ring. Two identical arcs are symmetrically cut off, leaving a drum shape. The width of the base is greater than the length of the hole above the seal cover. A spare positioning groove symmetrical to the center of the positioning groove is also opened on the other side of the top surface of the base. Two base through holes corresponding to the two seal cover screws are also opened in the spare positioning groove. In the above-mentioned method for removing the self-sealing tapered bearing seal cover, a spare base threaded through hole is opened on each side of the two base threaded through holes on the top surface of the base.

[0007] The method for removing the self-sealing tapered bearing seal cover of the present invention has the following characteristics: 1. The method for removing the cover of the present invention mainly involves disassembling the sealing cover by lifting it with a thread. The operation steps are simple and are not limited by site or energy.

[0008] 2. The method for removing the cover of the present invention can avoid damage to bearing components such as magnetic ring, bearing inner ring, bearing outer ring, and rollers, and facilitates subsequent maintenance.

[0009] 3. The parts of the tooling used in this invention are simple to process, and after mass production, it can handle the disassembly of small to medium batches of bearing seal covers.

[0010] 4. The cover-removing fixture used in this invention is symmetrically designed, which is convenient to use. If one side is unusable, the other side can be used. Attached Figure Description

[0011] Figure 1 This is a plan view of a self-sealing tapered bearing; Figure 1a yes Figure 1 AA direction view; Figure 2 This is an axial cross-sectional view of the cover removal tool used in this invention after it is installed on the bearing; Figure 3 This is a top view of the base in the cover-removing fixture used in this invention; Figure 3a yes Figure 3 BB view in the middle; Figure 3b yes Figure 3a The C-direction view; Figure 4 This is a top view of the positioning block in the cover removal tooling used in this invention; Figure 4a yes Figure 4 DD view in the middle; Figure 5 This is a top view of the screw connecting block in the cover-pulling tooling used in this invention; Figure 5a This is an axial cross-sectional view of the screw connecting block in the cover-pulling tool used in this invention; Figure 6 This is a top view of the torsion bar in the cover-pulling tool used in this invention; Figure 6a This is an axial cross-sectional view of the torsion bar in the cover-pulling tool used in this invention; Figure 7 This is an axial cross-sectional view of the self-sealing tapered bearing after step S2 in the shield removal method of the present invention. Figure 8 This is an axial cross-sectional view of the self-sealing tapered bearing after step S3 in the shield removal method of the present invention. Detailed Implementation

[0012] The invention will now be further described with reference to the accompanying drawings.

[0013] Please see Figures 1 to 8 The present invention provides a method for removing a self-sealing tapered bearing seal cover, used to remove a seal cover 10 comprising a magnetic ring connecting sleeve 11, a front retaining ring 12 connected to the front end of the magnetic ring connecting sleeve 11, an intermediate sleeve 13 connected to the outer end of the front retaining ring 12 and coaxially located outside the magnetic ring connecting sleeve 11, a rear retaining ring 14 connected to the rear end of the intermediate sleeve 13, and an outer ring connecting sleeve 15 connected to the outer end of the rear retaining ring 14 and coaxially located at the rear of the intermediate sleeve 13; a... A square hole 16 is provided, and a sealing cover screw 17 is symmetrically fixed on each side of the square hole 16; the outer ring connecting sleeve 15 of the sealing cover has an outer diameter protrusion 19 at the rear end of its outer surface that is interference-fitted with the groove 18 on the inner circumferential surface of the bearing outer ring 1A, so that the outer ring connecting sleeve 15 is inserted into the groove 18 of the bearing outer ring 1A through the outer diameter protrusion 19; a magnetic ring 1C with an axial cross section L is provided on the end face of the bearing inner ring 1B, and the magnetic ring connecting sleeve 11 of the sealing cover 10 is inserted into the inner circumferential surface of the axial part of the magnetic ring 1C.

[0014] The cover removal fixture includes a base 2, a positioning block 3, two screw connecting blocks 4, a torsion bar 5, a metal rod 6, and two internal hex head bolts 7; among which, The base 2 has a plane that is a circle with a diameter larger than the outer diameter of the bearing outer ring 1A. The bottom edge of the base 2 has three stepped surfaces that gradually thicken from the inside out: an upper step, a middle step, and a lower step. The inner diameter D3 of the upper step is adapted to the outer diameter d of the intermediate sleeve 13 of the sealing cover 10. The inner diameter D2 of the middle step is adapted to the maximum inner diameter of the bearing outer ring 1A, and the height H of the middle step is greater than the height h of the intermediate sleeve 13 of the sealing cover 10 and the height e of the outer ring connecting sleeve 15 of the sealing cover 10. The inner diameter D1 of the lower step is adapted to the outer diameter of the bearing outer ring 1A. Two threaded holes 21 are symmetrically opened at the center of the top edge of the base 2, penetrating to the bottom surface of the base 2. The distance E between the centers of the two threaded holes 21 is less than the outer diameter of the bearing outer ring 1A but greater than the maximum inner diameter of the bearing outer ring 1A. A rectangular positioning groove 22 is opened on one side of the top surface of the base 2. Two base through holes 23 are opened in the positioning groove 22, which correspond one-to-one with the two sealing cover screws 17. The planar shape and size of the positioning block 3 are the same as the planar shape and size of the positioning groove 22 on the base 2; a regular square prism 30 is provided in the middle of the top surface of the positioning block 3, and a positioning block threaded through hole 31 is provided in the regular square prism 30; a positioning block through hole 32 is opened on each side of the regular square prism 30. The lower part of the screw connecting block 4 is a cylindrical nut 41, and the outer diameter of the cylindrical nut 41 is adapted to the diameter of the through hole 32 of the positioning block on the positioning block 3, and the height of the cylindrical nut 41 is adapted to the height of the positioning block 3. The upper part of the screw connecting block 4 is a hexagonal nut 42, and the distance between opposite sides of the hexagon is greater than the outer diameter of the cylindrical nut 41. The internal thread hole 40 of the cylindrical nut 41 and the internal thread hole 40 of the hexagonal nut 42 are of the same diameter and coaxial. The torsion bar 5 includes a stud 51 that engages with the threaded through hole 31 on the positioning block 3 and a regular hexagonal prism 52 coaxially connected to the top of the stud 51; the length of the stud 51 is at least the height of the positioning block 3 + the height of the regular square prism 30 + the height of the outer ring connecting sleeve 15 of the sealing cover; a metal rod through hole 53 perpendicular to the stud 51 is opened in the middle of the side of the regular hexagonal prism 52. The diameter of the metal rod 6 is matched with the diameter of the through hole 53 of the metal rod of the torsion bar 5; The internal hex head bolt 7 engages with the base threaded through hole 21 on the base 2, and the length of the internal hex head bolt 7 is greater than the height of the base threaded through hole 21.

[0015] The method for removing the self-sealing tapered bearing seal cover of the present invention includes the following steps: S1. First, fit the two base through holes 23 in the positioning groove 22 of the base 2 onto the two sealing cover screws 17 of the sealing cover 10 one by one. Then, move the base 2 downwards along the two sealing cover screws 17 until the lower step surfaces on both sides of the base 2 contact the end face of the outer ring 1A of the bearing, and the height of the two sealing cover screws 17 protruding from the bottom surface of the positioning groove 22 of the base is not less than 4mm. Next, fit the two positioning block through holes 32 of the positioning block 3 onto the two sealing cover screws 17 one by one, and move the positioning block 3 downwards along the two sealing cover screws 17. Move until the positioning block 3 is located in the positioning groove 22 of the base 2, then screw the two screw connecting blocks 4 one by one onto the two sealing cover screws 17 until the bottom surface of the cylindrical nut 41 of the two screw connecting blocks 4 contacts the bottom surface of the positioning groove 22 of the base 2. Then install the stud 51 of the torsion bar 5 into the positioning block threaded through hole 31 of the positioning block 3. Finally, insert the metal rod 6 into the metal rod through hole 53 of the torsion bar 5, and screw the two internal hexagon head bolts 7 one by one into the two base threaded through holes 21 to complete the assembly of the cover removal tool. S2. Rotate the metal rod 6 horizontally, which drives the stud 51 of the torsion bar 5 to rotate. The stud 51 of the torsion bar 5 rotates downward in the threaded through hole 31 of the positioning block 3 until the stud 51 completely passes through the threaded through hole 31 of the positioning block, so that the bottom surface of the stud 51 contacts the bottom surface of the positioning groove 22 of the base 2. Continue to rotate the metal rod 6. Since the base 2 is fixed relative to the outer ring 1A of the bearing and cannot move, the thread on the stud 51 will drive the positioning block 3 to move upward along the stud 51, which in turn drives the two screw connecting blocks 4 to move upward together, so that the two screw connecting blocks 4 pull up the two sealing cover screws 17 on the sealing cover 10. Finally, the stud 51 of the torsion bar 5 will drive the sealing cover 10 to move upward as a whole, so that the outer diameter protrusion 19 on the outer ring connecting sleeve 15 of the sealing cover 10 disengages from the tooth groove 18 of the outer ring 1A of the bearing. S3. Since the sealing cover 10 only has sealing cover screws 17 on one side, the sealing cover 10 is lifted in an inclined state with one side of the two sealing cover screws 17 higher and the other side lower during the pulling process. Due to the length of the sealing cover screws 17 and the height of the sealing cover 10 itself, after steps S1 and S2, the sealing cover 10 is very likely not completely disassembled. Therefore, use an Allen wrench to continue rotating the two Allen bolts 7 that are located in the two corresponding threaded through holes 21 of the base. The base 2 is lifted upward by the action of the threads of the two Allen bolts 7 and the two threaded through holes 21 of the base. The rise of the base 2 drives the positioning block 3 to rise, which in turn drives the sealing cover 10 to rise until the sealing cover 10 is completely disengaged from the bearing outer ring 1A and the magnetic ring 1C.

[0016] To reduce the weight of the cover removal fixture, the base 2 of the cover removal fixture is designed as a drum shape, which is a circle with a diameter larger than the outer diameter of the bearing outer ring 1A, after two identical arcs are symmetrically cut off. The width of the base 2 is greater than the length of the hole 16 above the sealing cover 10. A spare positioning groove 22' symmetrical to the center of the positioning groove 22 is also opened on the other side of the top surface of the base 2. Two base through holes 23 corresponding to the two sealing cover screws 17 are also opened in the spare positioning groove 22'. A spare base thread through hole 21' is opened on each side of the two base thread through holes 21 on the top surface of the base 2.

[0017] The spare positioning groove 22' and the spare base threaded through hole 21' can be used when the positioning groove 22 and the base threaded through hole 21 are damaged.

[0018] The above embodiments are for illustrative purposes only and are not intended to limit the invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions should also fall within the scope of the invention and should be defined by the claims.

Claims

1. A method for removing a self-sealing tapered bearing seal cover, comprising using a seal cover removal tool to remove a seal cover including a magnetic ring connecting sleeve, a front retaining ring connected to the front end of the magnetic ring connecting sleeve, an intermediate sleeve connected to the outer end of the front retaining ring and coaxially located outside the magnetic ring connecting sleeve, a rear retaining ring connected to the rear end of the intermediate sleeve, and an outer ring connecting sleeve connected to the outer end of the rear retaining ring and coaxially located at the rear of the intermediate sleeve; the front retaining ring of the seal cover has a square hole, and a seal cover screw is symmetrically fixed on both sides of the square hole; the outer surface of the outer ring connecting sleeve of the seal cover has an outer diameter protrusion that is interference-fitted with the tooth groove on the inner circumferential surface of the bearing outer ring, so that the outer ring connecting sleeve is inserted into the tooth groove of the bearing outer ring through the outer diameter protrusion; the end face of the bearing inner ring has a magnetic ring with an axial cross section of L-shape, and the magnetic ring connecting sleeve of the seal cover is inserted into the inner circumferential surface of the axial part of the magnetic ring; The cover-removing fixture includes a base, a positioning block, two screw connecting blocks, a torsion bar, a metal rod, and two internal hexagon head bolts; characterized in that... The base has a plane that is a circle with a diameter larger than the outer diameter of the bearing outer ring; the bottom edge of the base has a three-step surface that gradually thickens from the inside out; the inner diameter of the upper step matches the outer diameter of the middle sleeve of the sealing cover; the inner diameter of the middle step matches the maximum inner diameter of the bearing outer ring, and the height of the middle step is greater than the height of the middle sleeve of the sealing cover and the height of the outer ring connecting sleeve of the sealing cover; the inner diameter of the lower step matches the outer diameter of the bearing outer ring; two threaded holes are symmetrically opened at the center of the top edge of the base, extending to the bottom surface of the base, and the distance between the centers of the two threaded holes is less than the outer diameter of the bearing outer ring but greater than the maximum inner diameter of the bearing outer ring; a rectangular positioning groove is opened on one side of the top surface of the base, and two base through holes corresponding one-to-one with the two sealing cover screws are opened in the positioning groove; The planar shape and size of the positioning block are the same as the planar shape and size of the positioning groove on the base; a regular square prism is provided in the middle of the top surface of the positioning block, and a positioning block threaded through hole is provided in the regular square prism; a positioning block through hole is opened on each side of the regular square prism. The lower part of the screw connecting block is a cylindrical nut, and the outer diameter of the cylindrical nut is adapted to the diameter of the through hole of the positioning block on the positioning block, and the height of the cylindrical nut is adapted to the height of the positioning block. The upper part of the screw connecting block is a hexagonal nut, and the distance between opposite sides of the hexagon is greater than the outer diameter of the cylindrical nut. The internal thread hole of the cylindrical nut and the internal thread hole of the hexagonal nut are of the same diameter and coaxial. The torsion bar includes a stud that engages with the threaded through hole of the positioning block and a regular hexagonal prism coaxially connected to the top of the stud; the length of the stud is at least the height of the positioning block + the height of the regular square prism + the height of the outer ring connecting sleeve of the sealing cover; a metal rod through hole perpendicular to the stud is opened in the middle of the side of the regular hexagonal prism. The diameter of the metal rod is adapted to the diameter of the hole through the metal rod of the torsion bar; The internal hex head bolt engages with the threaded through hole on the base, and the length of the internal hex head bolt is greater than the height of the threaded through hole on the base. The method for removing the mask includes the following steps: S1. First, fit the two base through holes in the positioning groove of the base onto the two sealing cover screws of the sealing cover one by one, and move the base down along the two sealing cover screws until the lower step surfaces on both sides of the base contact the end face of the outer ring of the bearing, and the height of the two sealing cover screws protruding from the bottom surface of the positioning groove of the base is not less than 4mm. Next, fit the two positioning block through holes of the positioning block onto the two sealing cover screws one by one, and move the positioning block down along the two sealing cover screws until the positioning block sits in the positioning groove of the base. Then, screw the two screw connecting blocks one by one onto the two sealing cover screws until the bottom surface of the cylindrical nut of the two screw connecting blocks contacts the bottom surface of the positioning groove of the base. Then, install the stud of the torsion bar into the positioning block threaded through hole of the positioning block. Finally, insert the metal rod through the metal rod through hole of the torsion bar, and screw the two internal hexagon head bolts one by one into the two base threaded through holes to complete the assembly of the cover removal fixture. S2. Rotate the metal rod horizontally, which drives the stud of the torsion bar to rotate. The stud of the torsion bar rotates downward in the threaded through hole of the positioning block until the bottom surface of the stud of the torsion bar contacts the top surface of the base. Continue to rotate the metal rod. The thread on the stud of the torsion bar will drive the positioning block to move upward along the stud, which in turn will drive the two screw connecting blocks to move upward together. This will cause the two screw connecting blocks to pull up the two sealing cover screws on the sealing cover. Finally, the stud of the torsion bar will drive the sealing cover to move upward as a whole, causing the outer diameter protrusion on the outer ring connecting sleeve of the sealing cover to disengage from the tooth groove of the bearing outer ring. S3. Continue to rotate the two hexagon socket head cap screws that correspond one-to-one in the two threaded through holes of the base, so that the base is lifted upward by the action of the threads of the two hexagon socket head cap screws and the two threaded through holes of the base. The rise of the base drives the positioning block to rise, and finally drives the sealing cover to rise upward until the sealing cover is completely disengaged from the bearing outer ring and the magnetic ring.

2. The method for removing the self-sealing tapered bearing seal cover according to claim 1, characterized in that, The base of the cover removal fixture has a plane that is a circle with a diameter larger than the outer diameter of the bearing outer ring. Two identical arcs are symmetrically cut off, leaving a drum shape. The width of the base is greater than the length of the hole above the sealing cover. A spare positioning groove symmetrical to the center of the positioning groove is also opened on the other side of the top surface of the base. Two base through holes corresponding to the two sealing cover screws are also opened in the spare positioning groove.

3. The method for removing the self-sealing tapered bearing seal cover according to claim 2, characterized in that, On the top surface of the base, a spare base threaded through hole is opened on each side of the two base threaded through holes.

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