Bearing rear retainer ring and axle assembly of railway vehicle

Abstract

The invention provides a bearing rear check ring of a railway vehicle and an axle assembly, and belongs to the field of railway vehicle axle boxes. The bearing rear retainer ring of the railway vehicle comprises a rear retainer body and a sealing ring, the sealing ring comprises a sealing body, one axial end of the sealing body is assembled in the rear retainer body in an interference mode, and the inner circumferential face of the sealing body is a sealing matching face used for being in interference fit with the outer circumferential face of a dustproof plate seat. The sealing ring further comprises a matching structure which is arranged on the outer side of the circumference of the sealing body and used for being matched with a disassembling tool to disassemble the sealing ring from the rear blocking body in the axial direction, and the matching structure is an annular protrusion or an annular groove. An axle assembly of a railway vehicle includes a main shaft, a bearing mounted at an end of the main shaft, and a rear retainer ring. The matching structure used for being matched with the disassembling tool is arranged on the outer side of the sealing ring, so that the contact area between the inner side of the sealing ring and the dustproof plate base is increased, the stability and the sealing effect are improved, and the disassembling tool can be universal.

Description

Technical Field

[0001] The invention belongs to the field of railway vehicle axle boxes, and in particular relates to a bearing rear retainer ring and an axle assembly of a railway vehicle. Background Art

[0002] A rear retainer is installed on the axle of the axle box of a railway vehicle to fix the inner ring of the bearing and prevent the inner ring of the bearing from axial movement. The rear retainer of the bearing is fitted on the axle with an interference fit. During the operation of the railway vehicle, vibration will occur, causing the surface of the rear retainer and the dust plate seat on the axle to wear, thereby loosening the rear retainer, which is not conducive to the fixation and sealing of the bearing. During maintenance, the entire rear retainer needs to be replaced, which increases the maintenance cost of the railway vehicle.

[0003] The existing Chinese invention patent application with application publication number CN105128883A discloses a rear retainer ring for a rolling bearing of a railway freight car, the rear retainer ring comprising a rear retainer body and a sealing ring, an annular notch is provided on the axial end face of the rear retainer body, one end of the sealing ring is installed in the annular notch, the other end is sleeved on the dust plate seat and has an interference fit with the dust plate seat, an annular groove is provided on the inner side of the sealing ring to facilitate the use of tools to remove the sealing ring, so the side wall of the annular groove constitutes an axial force wall for cooperating with the removal tool. The rear retainer ring uses the sealing ring to have an interference fit with the dust plate seat, so that after the sealing ring is worn, only the sealing ring needs to be replaced, and the rear retainer body can still be used, reducing the maintenance cost.

[0004] However, in order to facilitate the removal of the sealing ring, the above-mentioned rear retaining ring is provided with an annular groove on the inner side of the sealing ring, which reduces the contact area between the sealing ring and the dust plate seat, and reduces the sealing effect between the sealing ring and the main body of the dust plate seat. If the axial dimension of the sealing ring is increased in order to obtain a better sealing effect, a larger axial space on the axle will be occupied. In addition, in order to remove the sealing ring, a special disassembly tool that can reach into the inner side of the sealing ring and cooperate with the annular groove is required, which is not convenient for operators to operate and increases the maintenance cost. In addition, the part of the sealing ring that is interference-fitted with the dust plate seat is cantilevered outside the annular groove, and cannot obtain good support in the radial direction, which will also affect its sealing effect. Summary of the invention

[0005] One of the purposes of the present invention is to provide a rear retaining ring for a bearing of a railway vehicle, so as to solve the technical problems in the prior art that the sealing ring of the rear retaining ring has an annular groove on the inner side, which reduces the contact area between the sealing ring and the dust plate seat and leads to poor sealing effect, and that the sealing ring needs to be equipped with an additional disassembly tool, which is inconvenient to operate and has high maintenance costs.

[0006] Another object of the present invention is to provide an axle assembly for a railway vehicle to solve the above technical problems.

[0007] To achieve the above-mentioned purpose, the technical solution of the bearing rear retainer ring of a railway vehicle provided by the present invention is: A rear bearing ring for a railway vehicle comprises a rear bearing body and a sealing ring, wherein the sealing ring comprises a sealing body, one axial end of the sealing body is interference fitted in the rear bearing body, the inner circumferential surface of the sealing body is a sealing mating surface for interference fitting with the outer circumferential surface of a dust plate seat, and the sealing ring further comprises a mating structure arranged on the circumferential outer side of the sealing body for cooperating with a disassembly tool to axially disassemble the sealing ring from the rear bearing body, wherein the mating structure is an annular protrusion or an annular groove.

[0008] As a further improvement, the matching structure is an annular protrusion, and a disassembly annular groove for matching with a disassembly tool is provided on the axial end surface of the annular protrusion facing the rear stop body.

[0009] As a further improvement, the mating structure is an annular protrusion, the rear stop body includes a rear stop portion and a press-fit portion located at one axial end of the rear stop portion and capable of cantilevering on the radial outside of the dust plate seat when in use, the axial end of the sealing body is interference fitted on the inner side of the press-fit portion, the axial dimension of the press-fit portion is smaller than the distance from the end face of the sealing body installed in the press-fit portion to the end face of the annular protrusion facing the rear stop body, and / or the radial dimension of the annular protrusion is larger than the radial dimension of the press-fit portion.

[0010] As a further improvement, the rear stop body includes a rear stop portion and an annular disassembly fitting portion arranged on the outer peripheral side of the rear stop portion, and the axial dimension of the disassembly fitting portion is smaller than the axial dimension of the rear stop portion.

[0011] As a further improvement, a guiding inner conical surface is provided at the end of the inner side of the sealing ring away from the rear stop body.

[0012] As a further improvement, the rear stop body of the rear stop ring includes a rear stop part, an inner lining ring is provided at one end of the rear stop part axially away from the sealing ring, and a convex ring protruding radially outward is provided at one end of the inner lining ring axially away from the rear stop part, and the convex ring is used to engage with a slot provided on the inner wall of the matching ring groove of the inner ring of the bearing.

[0013] As a further improvement, the liner ring is used to be installed in the matching ring groove of the inner ring of the bearing and to be clearance-matched with the matching ring groove.

[0014] The beneficial effect is that the rear retaining ring of the bearing of the railway vehicle provided by the present invention belongs to the invention of changing the relationship between elements. The present invention sets the matching structure for matching with the disassembly tool on the outside of the sealing ring, so as to ensure that the sealing matching surface of the sealing ring and the outer peripheral surface of the dustproof plate seat have a larger contact area, improve the stability of the sealing ring and the sealing effect between the sealing ring and the dustproof plate seat, and ensure that the axial size of the sealing ring is small. Moreover, the disassembly tool can hook the axial force wall of the sealing ring from the outside of the sealing ring to disassemble the sealing ring. The disassembly tool can be used in conjunction with the disassembly tool for disassembling the bearing, which improves the convenience of maintenance and reduces the maintenance cost.

[0015] To achieve the above-mentioned purpose, the technical solution of the axle assembly of a railway vehicle provided by the present invention is: An axle assembly of a railway vehicle comprises a main shaft, a bearing mounted on the end of the main shaft and a rear retaining ring, the rear retaining ring comprises a rear retaining body and a sealing ring, the sealing ring comprises a sealing body, one axial end of the sealing body is interference fitted in the rear retaining body, the inner circumferential surface of the sealing body is a sealing mating surface for interference fitting with the outer circumferential surface of a dust plate seat, the sealing ring also comprises a mating structure arranged on the circumferential outer side of the sealing body for cooperating with a disassembly tool to axially remove the sealing ring from the rear retaining body, the mating structure being an annular protrusion or an annular groove.

[0016] As a further improvement, the matching structure is an annular protrusion, and a disassembly annular groove for matching with a disassembly tool is provided on the axial end surface of the annular protrusion facing the rear stop body.

[0017] As a further improvement, the mating structure is an annular protrusion, the rear stop body includes a rear stop portion and a press-fit portion located at one axial end of the rear stop portion and capable of cantilevering on the radial outside of the dust plate seat when in use, the axial end of the sealing body is interference fitted on the inner side of the press-fit portion, the axial dimension of the press-fit portion is smaller than the distance from the end face of the sealing body installed in the press-fit portion to the end face of the annular protrusion facing the rear stop body, and / or the radial dimension of the annular protrusion is larger than the radial dimension of the press-fit portion.

[0018] As a further improvement, the rear stop body includes a rear stop portion and an annular disassembly fitting portion arranged on the outer peripheral side of the rear stop portion, and the axial dimension of the disassembly fitting portion is smaller than the axial dimension of the rear stop portion.

[0019] As a further improvement, a guiding inner conical surface is provided at the end of the inner side of the sealing ring away from the rear stop body.

[0020] As a further improvement, a mating ring groove is formed on the inner ring of the bearing, and the rear stop body of the rear stop ring includes a rear stop part, an inner lining ring is provided at one end of the rear stop part axially away from the sealing ring, a convex ring protruding radially outward is provided at one end of the inner lining ring axially away from the rear stop part, and a clamping groove for clamping with the convex ring is provided on the inner wall of the mating ring groove.

[0021] As a further improvement, the outer peripheral surface of the liner ring is clearance-matched with the matching ring groove.

[0022] The beneficial effect is that the axle assembly of the railway vehicle provided by the present invention belongs to the invention of changing the relationship between elements. The present invention sets the matching structure on the sealing ring for matching with the disassembly tool on the outside of the sealing ring, so as to ensure that the sealing matching surface of the sealing ring and the outer peripheral surface of the dustproof plate seat have a larger contact area, improve the stability of the sealing ring and the sealing effect between the sealing ring and the dustproof plate seat, and ensure that the axial size of the sealing ring is small. Moreover, the disassembly tool can hook the axial force-bearing wall of the sealing ring from the outside of the sealing ring to disassemble the sealing ring. The disassembly tool can be used in conjunction with the disassembly tool for disassembling the bearing, which improves the convenience of maintenance and reduces the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of Embodiment 1 of the axle assembly of a railway vehicle in the present invention; Figure 2 for Figure 1 A partial enlarged view of the middle A; Figure 3 for Figure 2 A partial enlarged view of point B in the middle.

[0024] Description of reference numerals: 1. Spindle; 11. Journal; 12. Dust plate seat; 2. Bearing; 21. Matching ring groove; 22. Clamping groove; 3. End cover; 4. Bolt; 5. Rear retainer ring; 51. Rear retainer body; 511. Rear retainer part; 512. Press-fit part; 513. Disassembly matching part; 514. Liner ring; 515. Protruding ring; 52. Sealing ring; 521. Sealing body; 522. Annular protrusion; 523. Sealing matching surface; 524. Disassembly ring groove; 525. Guide inner cone. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with embodiments.

[0026] In order to solve the problems in the prior art, the basic concept of the present invention is to set the matching structure for cooperating with the disassembly tool on the outside of the sealing ring, thereby increasing the contact area between the inner side of the sealing ring and the dustproof plate seat, improving the stability and sealing effect, and the disassembly tool can also be universal.

[0027] Specific embodiment 1 of the axle assembly of a railway vehicle provided by the present invention: An axle assembly for a railway vehicle, see attached Figure 1 , including a main shaft 1, a bearing 2, an end cover 3 and a rear retaining ring 5.

[0028] The main shaft 1 includes a journal 11 and a dust plate seat 12, and there is an arc-shaped shoulder section between the journal 11 and the dust plate seat 12. The rear retaining ring 5 is installed at the shoulder section and is sealed with the dust plate seat 12. The bearing 2 is interference-fitted on the journal 11. The end cover 3 is fixedly installed on the end of the journal 11 by bolts 4. The end cover 3 is press-fitted with the inner ring of the bearing 2 and serves to limit the bearing 2 in the axial direction.

[0029] The rear baffle 5 includes a rear baffle body 51 and a sealing ring 52 . The sealing ring 52 is located at one end of the rear baffle 5 away from the end cover 3 .

[0030] See attached Figure 2 The rear stop body 51 includes a rear stop portion 511, a press-fit portion 512, a disassembly fitting portion 513, an inner liner ring 514 and a convex ring 515, all of which are annular. The inner liner ring 514 is located at one end of the rear stop portion 511 facing the end cover 3, and the inner side surface of the inner liner ring 514 is aligned with the inner side surface of the rear stop portion 511. The convex ring 515 is located at one end of the inner liner ring 514 away from the rear stop portion 511, and radially protrudes outward from the inner liner ring 514. The press-fit portion 512 is located at one end of the rear stop portion 511 away from the end cover 3, and the press-fit portion 512 is cantilevered radially outward of the dust plate seat 12. The inner circumferential surface of the press-fit portion 512 and the corresponding end surface of the rear stop portion 511 in the axial direction form an annular groove structure for the sealing ring 52 to be installed. The disassembly fitting portion 513 is located on the outer peripheral side of the rear stop portion 511, and the axial dimension of the disassembly fitting portion 513 is smaller than the axial dimension of the rear stop portion 511. The disassembly fitting portion 513 can be used as a force-applying portion for a disassembly tool to disassemble the rear retaining ring 5, thereby facilitating the disassembly operation.

[0031] A mating ring groove 21 is formed on the inner ring of the bearing 2 near the rear retaining ring 5. The mating ring groove 21 is located at the axial end of the inner ring of the bearing 2. The circumferential side wall surface of the mating ring groove 21 is clearance-matched with the outer circumferential surface of the inner liner ring 514 to facilitate assembly. An annular retaining groove 22 is also provided on the circumferential side wall surface of the mating ring groove 21, and the retaining groove 22 is snap-fitted with the convex ring 515.

[0032] During the assembly of the rear retaining ring 5 and the bearing 2, the inner ring 514 first contracts radially, and then when the rear retaining ring 5 is assembled in place, the convex ring 515 is inserted into the retaining groove 22, and the inner ring 514 returns to its original state. In order to facilitate the radial deformation of the inner ring 514, the inner diameter of the inner ring 514 in this embodiment is larger than the outer diameter of the journal 11, and the annular space between the inner ring 514 and the journal 11 can be used for the deformation of the inner ring 514. The cooperation between the convex ring 515 and the retaining groove 22 can make the connection between the rear retaining ring 5 and the bearing 2 more secure, and the side of the convex ring 515 close to the rear retaining portion 511 and the corresponding side wall of the retaining groove 22 are both conical surfaces, so that after the rear retaining ring 5 and the bearing 2 are assembled in place, the rear retaining ring 5 is always pressed against the end face of the inner ring of the bearing 2, avoiding the axial gap between the convex ring 515 and the bearing 2. After the lining ring 514 and the convex ring 515 are provided, the relative stability between the rear block body 51 and the inner ring of the bearing 2 can be maintained, and the mutual wear between the inner ring of the bearing 2 and the rear block body 51 can be reduced.

[0033] The sealing ring 52 includes a sealing body 521 and an annular protrusion 522, both of which are annular. The inner circumferential surface of the sealing body 521 is a sealing mating surface 523 for interference fit with the circumferential surface of the dust plate seat 12, one axial end of the sealing body 521 is mounted on the inner side of the press-fitting portion 512 and is interference fit with the press-fitting portion 512, and the annular protrusion 522 is located on the circumferential outer side of the end of the sealing body 521 away from the rear stop body 51, and the end surface of the annular protrusion 522 axially away from the rear stop body 51 is aligned with the end surface of the sealing body 521 axially away from the rear stop body 51.

[0034] The annular protrusion 522 is a matching structure for matching with a disassembly tool. A disassembly annular groove 524 is provided on one end surface of the annular protrusion 522 facing the rear block body 51. When separating the sealing ring 52 from the rear block body 51, the operator can use a disassembly tool to hook in the disassembly annular groove 524 to remove the sealing ring 52. The disassembly annular groove 524 is provided to improve the reliability of matching between the disassembly tool and the annular protrusion 522 and to improve the disassembly efficiency. Therefore, not providing the disassembly annular groove 524 does not affect the normal disassembly operation.

[0035] In order to further facilitate the disassembly of the sealing ring 52, a large space needs to be reserved between the annular protrusion 522 and the press-fitting portion 512, so that the annular protrusion 522 can cooperate with the disassembly tool. In this embodiment, the axial dimension of the press-fitting portion 512 is smaller than the distance from the end face of the sealing body 521 installed in the press-fitting portion 512 to the end face of the annular protrusion 522 facing the rear stop body, so that there is space between the annular protrusion 522 and the press-fitting portion 512 in the axial direction; and in this embodiment, the radial dimension of the annular protrusion 522 is larger than the radial dimension of the press-fitting portion 512, so that there is space on the outside of the press-fitting portion 512, so that the claw of the disassembly tool can be inserted.

[0036] Before assembling the various components onto the main shaft 1, the sealing ring 52 needs to be forcibly installed into the rear block body 51 to form a complete rear block ring 5. The rear block body 51 can also be connected to the inner ring of the bearing 2 before being installed onto the main shaft 1. This process can be performed before or after the rear block body 51 and the sealing ring 52 are assembled.

[0037] When the seal ring 52 is worn and affects normal use, first use a disassembly tool to hook the end of the disassembly fitting portion 513 of the rear retainer 5 axially close to the seal ring 52, pull the rear retainer 5 outward, and remove the inner ring of the bearing 2 while removing the rear retainer 5. Then fix the rear retainer body 51, and then use a disassembly tool to hook the annular protrusion 522 on the seal ring 52 to remove the seal ring 52. After replacing the new seal ring 52, the rear retainer body 51 can be used again.

[0038] The inner side surface of the sealing ring 52 of the rear retaining ring 5 is a complete annular surface, and the contact area with the dustproof plate seat 12 is large. Therefore, compared with the prior art, the sealing effect of the sealing ring 52 and the dustproof plate seat 12 will be better, and the connection between the sealing ring 52 and the dustproof plate seat 12 will be more stable, thereby reducing the micro-motion wear between the sealing ring 52 and the dustproof plate seat 12, and also reducing the micro-motion wear between the rear retaining ring 5 and the inner ring of the bearing 2. In addition, the sealing ring 52 of the rear retaining ring 5 sets the matching structure for disassembling the sealing ring 52 on the outside of the sealing ring 52, so the sealing ring 52 can be disassembled using the disassembly tool for disassembling the retaining ring body and the bearing 2, and there is no need to prepare additional disassembly tools for the sealing ring 52, thereby improving the convenience and cost of disassembly of the sealing ring 52. In addition, since the press-fitting part 512 is used to provide radial support for the sealing body 521 in this embodiment, the sealing body 521 is compressed in the radial direction after being assembled, so that a better sealing effect can be achieved.

[0039] See attached Figure 3 In this embodiment, both ends of the inner side of the sealing ring 52 are provided with guiding inner conical surfaces 526 to reduce the resistance when the sealing ring 52 is installed on the dustproof plate seat 12, thereby improving the convenience of installation. In addition, the positive corners and the negative corners on the sealing ring 52 are both rounded to avoid stress concentration on the sealing ring 52 and improve the service life of the sealing ring 52. In other embodiments, the inner conical surface may not be provided on the sealing ring 52.

[0040] In this embodiment, the side of the disassembly fitting portion 513 close to the sealing ring 52 is a conical surface, which can guide the disassembly tool when disassembling the sealing ring 52, making it easier for the disassembly tool to hook the sealing ring 52 and improving the disassembly efficiency of the sealing ring 52.

[0041] In this embodiment, conical surfaces are provided on the inner and outer sides of the axial end of the press-fitting portion 512, wherein the inner conical surface can facilitate the assembly of the sealing ring 52, and the outer conical surface can expand the space between the press-fitting portion 512 and the above-mentioned groove structure, thereby facilitating the use of disassembly tools.

[0042] The disassembly tool in this embodiment is specifically a puller, and in other embodiments it may also be other tools with similar structures.

[0043] Specific embodiment 2 of the axle assembly of a railway vehicle provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, in this embodiment, a separate disassembly fitting portion is not provided, but the outer diameter of the rear stop portion is increased, so that the rear stop portion can be used as a force application portion of the disassembly tool.

[0044] Specific embodiment 3 of the axle assembly of a railway vehicle provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, in this embodiment, the inner liner ring and the inner ring of the bearing are interference fit, and the rear retaining ring can also rely on the friction force generated by the interference fit between the inner liner ring and the inner ring of the bearing to maintain a firm connection with the inner ring of the bearing.

[0045] Specific embodiment 4 of the axle assembly of a railway vehicle provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that no inner liner ring is provided in this embodiment, and the rear retaining ring directly abuts against the inner ring of the bearing in the axial direction.

[0046] In order to reduce the wear between the rear retaining ring and the inner ring of the bearing, a spacer ring made of plastic steel material can be arranged between the rear retaining ring and the inner ring of the bearing.

[0047] Specific embodiment 5 of the axle assembly of a railway vehicle provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, in this embodiment, the axial dimension of the press-fitting portion is smaller than the distance from the end face of the sealing body installed in the press-fitting portion to the end face of the annular protrusion facing the rear stopper body, but the radial dimension of the annular protrusion is smaller than or equal to the radial dimension of the press-fitting portion, so that the outer diameter of the annular protrusion is equal to the outer diameter of the press-fitting portion.

[0048] In this embodiment, a space for the disassembly tool to be installed has been reserved between the annular protrusion and the press-fitting portion in the axial direction, so the normal disassembly of the sealing ring will not be affected.

[0049] Specific embodiment 6 of the axle assembly of a railway vehicle provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, in this embodiment, the radial dimension of the annular protrusion is greater than the radial dimension of the press-fitting portion, but the axial dimension of the press-fitting portion is greater than or equal to the distance from the end face of the sealing body inserted into the press-fitting portion to the end face of the annular protrusion facing the rear stopper body, and the annular protrusion abuts against the axial end face of the press-fitting portion.

[0050] In this embodiment, a space is reserved on the outer side of the press-fitting portion for a disassembly tool to hook the annular protrusion, thereby not affecting the normal disassembly of the sealing ring.

[0051] Specific embodiment 7 of the axle assembly of a railway vehicle provided by the present invention: This embodiment is based on the first embodiment, and is different from the first embodiment in that the rear block body in this embodiment is not provided with a press-fitting portion, but an annular groove is provided on the end face of the rear block body away from the bearing, and one axial end of the sealing ring is interference-fitted in the annular groove. The rear block body in this embodiment has the same structure as the rear block body in the application publication number CN105128883A, and will not be described in detail here.

[0052] Specific embodiment 8 of the axle assembly of a railway vehicle provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that no annular protrusion is provided on the sealing ring in this embodiment, and the matching structure in this embodiment is an annular groove provided on the outer peripheral surface of the sealing body.

[0053] The specific embodiment of the bearing rear retainer ring of the railway vehicle provided by the present invention is as follows: The bearing rear retaining ring of the railway vehicle is the rear retaining ring in any one of the specific embodiments 1-8 of the axle assembly of the railway vehicle mentioned above, which will not be described in detail here.

[0054] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rear bearing ring for a railway vehicle, characterized in that: The utility model comprises a rear block body and a sealing ring, wherein the sealing ring comprises a sealing body, one axial end of the sealing body is interference fitted in the rear block body, the inner circumferential surface of the sealing body is a sealing mating surface for interference fit with the outer circumferential surface of the dust plate seat, and the sealing ring also comprises a mating structure arranged on the circumferential outer side of the sealing body for cooperating with a disassembly tool to remove the sealing ring from the rear block body along the axial direction, wherein the mating structure is an annular protrusion or an annular groove.

2. The rear bearing ring of a railway vehicle according to claim 1, characterized in that: The matching structure is an annular protrusion, and a disassembly annular groove for matching with a disassembly tool is provided on the axial end surface of the annular protrusion facing the rear stop body.

3. The rear bearing ring of a railway vehicle according to claim 1 or 2, characterized in that: The matching structure is an annular protrusion, and the rear stop body includes a rear stop portion and a press-fit portion located at one axial end of the rear stop portion and capable of cantilevering on the radial outside of the dust plate seat when in use. One axial end of the sealing body is interference fitted on the inner side of the press-fit portion, and the axial dimension of the press-fit portion is smaller than the distance from the end face of the sealing body installed in the press-fit portion to the end face of the annular protrusion facing the rear stop body, and / or the radial dimension of the annular protrusion is larger than the radial dimension of the press-fit portion.

4. The rear bearing ring of a railway vehicle according to claim 1 or 2, characterized in that: The rear stop body comprises a rear stop portion and an annular disassembly fitting portion arranged on the outer peripheral side of the rear stop portion, and the axial dimension of the disassembly fitting portion is smaller than the axial dimension of the rear stop portion.

5. The rear bearing ring of a railway vehicle according to claim 1 or 2, characterized in that: The end of the inner side of the sealing ring away from the rear stop body is provided with a guiding inner conical surface.

6. The rear bearing ring of a railway vehicle according to claim 1 or 2, characterized in that: The rear stop body of the rear stop ring includes a rear stop part, an inner lining ring is arranged at one end of the rear stop part axially away from the sealing ring, and a convex ring protruding radially outward is arranged at one end of the inner lining ring axially away from the rear stop part, and the convex ring is used to engage with the clamping groove arranged on the inner wall of the matching ring groove of the inner ring of the bearing.

7. The rear bearing ring of a railway vehicle according to claim 6, characterized in that: The liner ring is used to be installed in the matching ring groove of the inner ring of the bearing and to be matched with the matching ring groove clearance.

8. An axle assembly for a railway vehicle, comprising a main shaft, a bearing mounted on the end of the main shaft and a rear retaining ring, characterized in that: The rear retaining ring is a bearing rear retaining ring of a railway vehicle as described in any one of claims 1 to 5.

9. The railway vehicle axle assembly according to claim 8, wherein: A matching ring groove is formed on the inner ring of the bearing, and the rear stop body of the rear stop ring includes a rear stop part, an inner liner ring is arranged at one end of the rear stop part axially away from the sealing ring, a convex ring protruding radially outward is arranged at one end of the inner liner ring axially away from the rear stop part, and a clamping groove for clamping with the convex ring is arranged on the inner wall of the matching ring groove.

10. The railway vehicle axle assembly according to claim 9, wherein: The outer peripheral surface of the liner ring is clearance-matched with the matching ring groove.

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