Heavy-load high-speed rail brake bearing

Abstract

The utility model relates to the technical field of high-speed rail brake bearings, in particular to a heavy-load high-speed rail brake bearing which comprises an outer ring, an inner ring, steel balls and a protective shell. An inner ring is arranged on one side of the outer ring, steel ball mounting parts are arranged on the inner sides of the outer ring and the inner ring, steel balls are arranged in the steel ball mounting parts, and protective shells are arranged on the outer sides of the outer ring and the inner ring; the inner ring and the outer ring of the high-speed rail brake bearing are made of high-quality bearing steel, and the inner ring and the outer ring are subjected to carbonitriding heat treatment, so that the center of the bearing ring has good toughness, the bearing ring is high in working surface hardness, good in wear resistance, high in fatigue strength and long in service life in the use process, meanwhile, the corrosion resistance is improved, and the actual use requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed rail brake bearings, in particular to a heavy-load high-speed rail brake bearing. Background Art

[0002] The Chinese patent document published as CN115596766A discloses a high-speed rail axle box bearing, which proposes that at present, high-speed rail generally adopts double-row tapered roller bearings or double-row cylindrical roller bearings. These two bearings can meet the speed requirements of high-speed rail. However, for high-speed rail axle box bearings, when the high-speed rail is in a large-diameter bend, these two bearings can only rely on the bearing rollers themselves to withstand the increase in axial load, and their reliability is not high, and their service life is also easily affected; its solution is to use elliptical rollers as the main load-bearing body to bear the load transmitted by the inner ring. When the external environment changes and the force transmitted by the bearing changes, the elliptical rollers can drive the inner rings to offset in the roller track according to the load, so that the elliptical rollers reach the best load-bearing position, ensure the bearing contact performance, and thus effectively transmit the load. The spherical rollers play the role of sharing the load, reducing the effect of load concentration on the roller bearing, and ensuring its smooth movement.

[0003] The above scheme and the existing technology have disadvantages in the use of high-speed rail brake bearings, such as high noise during operation, high energy consumption, low load-bearing capacity, and poor safety performance. During the use, if some minor wear occurs during the maintenance of the high-speed rail, the bearings must be replaced with new ones. The actual service life of the replaced bearings is far from their designed life, resulting in high maintenance costs and failure to meet actual use needs.

[0004] To this end, the utility model proposes a heavy-load high-speed railway brake bearing to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a heavy-load high-speed railway brake bearing to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a heavy-load high-speed railway brake bearing, comprising an outer ring, an inner ring, steel balls and a protective shell;

[0007] An inner ring is provided on one side of the outer ring, and steel ball mounting parts are provided on the inner sides of the outer ring and the inner ring, and steel balls are provided in the steel ball mounting parts, and protective shells are provided on the outer sides of the outer ring and the inner ring;

[0008] An outer ring limiting portion is provided on the inner side of the outer ring, and the outer ring limiting portion is connected to the steel ball limiter, and an outer ring outer diameter is provided at one end of the outer ring, and an outer ring chamfer is provided on the side surface of the other end of the outer ring;

[0009] An inner ring limiting portion is provided on the inner side of the inner ring, and the inner ring limiting portion is connected to the steel ball limiting portion, and an inner ring outer diameter is provided at one end of the inner ring;

[0010] The protective shell includes a limit block, one end of which is arranged on the outside of the outer ring and the inner ring.

[0011] Preferably, the other end of the limit block is arranged in a limit groove arranged on the inner side of the protective shell.

[0012] Preferably, the steel ball is configured as a spherical roller, and the configured steel ball is positionally connected to the outer ring and the inner ring.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] By selecting Xingcheng high-quality bearing steel for the inner and outer rings of the high-speed rail brake bearings, and subjecting the inner and outer rings to carbonitriding heat treatment, the core of the bearing ring has good toughness. During use, the working surface has high hardness, good wear resistance, high fatigue strength, and long bearing life. At the same time, the corrosion resistance is improved to meet actual use needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the high-speed rail brake bearing of the utility model;

[0016] Figure 2 This is a schematic diagram of the inner ring structure of the utility model;

[0017] Figure 3 This is an enlarged schematic diagram of the structure at point H in the inner ring of the utility model;

[0018] Figure 4 This is a schematic diagram of the outer ring structure of the utility model;

[0019] Figure 5 This is an enlarged schematic diagram of the structure at position H in the outer ring of the utility model;

[0020] Figure 6 It is an enlarged schematic diagram of the structure at position Z in the outer ring of the utility model.

[0021] In the figure: outer ring 1, inner ring 2, steel ball 3, steel ball mounting portion 4, outer ring outer diameter 5, outer ring limiting portion 6, outer ring chamfer 7, inner ring limiting portion 8, inner ring outer diameter 9, limiting block 10, limiting groove 11, protective shell 12. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention are described clearly and completely below. The embodiments of the present invention and all other embodiments obtained by persons of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0023] See also Figures 1 to 6 A heavy-loaded high-speed rail brake bearing, the utility model provides a technical solution:

[0024] Example 1: A heavy-duty high-speed rail brake bearing comprises an outer ring 1, an inner ring 2, steel balls 3, and a protective housing. Under cyclic loads, the bearing's contact surface is susceptible to fatigue damage, i.e., cracking and spalling, a major form of bearing failure. Therefore, to extend the bearing's service life, the bearing steel must possess high contact fatigue strength.

[0025] An inner ring 2 is provided on one side of the outer ring 1, and a steel ball mounting portion 4 is provided on the inner sides of the outer ring 1 and the inner ring 2, and a steel ball 3 is provided in the steel ball mounting portion 4, and a protective shell is provided on the outer side of the outer ring 1 and the inner ring 2, and the protective shell is used to protect the outer ring 1 and the inner ring 2.

[0026] During use, the retainer design is replaced with a full-fill steel ball design, which improves the bearing's load-bearing capacity. The axial basic static load rating Coa is increased from 11.41 kN to 20.99 kN, an increase of 84%. The radial static load [central axial static load] generated at the contact center of the maximum loaded rolling element and raceway is equivalent to the following calculated contact stress and is the bearing's radial basic static load rating [axial basic static load rating]. The axial basic dynamic load rating Ca is increased from 4.64 kN to 6.97 kN, an increase of 50%. The basic dynamic load rating refers to the load that the bearing can withstand when its basic rated life is exactly 1 million revolutions, usually represented by the letter C. It reflects the bearing's load-bearing capacity under certain life conditions.

[0027] An outer ring limiting portion 6 is provided on the inner side of the outer ring 1 and is limitedly connected to the steel ball 3 . An outer ring outer diameter 5 is provided at one end of the outer ring 1 and an outer ring chamfer 7 is provided on the side of the other end of the outer ring 1 .

[0028] An inner ring limiting portion 8 is provided on the inner side of the inner ring 2 , and the inner ring limiting portion 8 is connected to the steel ball 3 in a limiting manner, and an inner ring outer diameter 9 is provided at one end of the inner ring 2 .

[0029] The protective housing includes a limit block 10 , one end of which is arranged outside the outer ring 1 and the inner ring 2 .

[0030] Embodiment 2: Based on embodiment 1, the other end of the limiting block 10 is arranged in the limiting groove 11 provided on the inner side of the protective shell 12 .

[0031] During use, in order to prevent bearing parts and finished products from being corroded and rusted during processing, storage and use, the bearing steel is required to have good anti-rust properties. The surfaces of the outer ring 1 and the inner ring 2 are blackened to improve the corrosion resistance of the bearing.

[0032] Bearing disassembly is a regular maintenance procedure and is performed when replacing bearings. If the bearing is to be used again after disassembly or if the bearing's condition needs to be checked, disassembly should be performed with the same care as during installation. Be careful not to damage the bearing components, especially when disassembling bearings with interference fits, as this can be difficult.

[0033] The steel ball 3 is configured as a spherical roller, and the configured steel ball 3 is position-limitedly connected to the outer ring 1 and the inner ring 2 .

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heavy-load high-speed rail brake bearing, characterized by: It includes an outer ring (1), an inner ring (2), a steel ball (3) and a protective shell; An inner ring (2) is provided on one side of the outer ring (1), and a steel ball mounting portion (4) is provided on the inner sides of both the outer ring (1) and the inner ring (2), and a steel ball (3) is provided in the steel ball mounting portion (4), and a protective shell is provided on the outer sides of both the outer ring (1) and the inner ring (2); An outer ring limiting portion (6) is provided on the inner side of the outer ring (1), and the outer ring limiting portion (6) is connected to the steel ball (3) in a limiting manner, and an outer ring outer diameter (5) is provided on one end of the outer ring (1), and an outer ring chamfer (7) is provided on the side surface of the other end of the outer ring (1); An inner ring limiting portion (8) is provided on the inner side of the inner ring (2), and the inner ring limiting portion (8) is connected to the steel ball (3) in a limiting manner, and an inner ring outer diameter (9) is provided at one end of the inner ring (2); The protective housing comprises a limit block (10), one end of which is arranged outside the outer ring (1) and the inner ring (2).

2. A heavy-load high-speed railway brake bearing according to claim 1, characterized in that: The other end of the limiting block (10) is arranged in a limiting groove (11) provided on the inner side of the protective shell (12).

3. The heavy-load high-speed railway brake bearing according to claim 1, characterized in that: The steel ball (3) is configured as a spherical roller, and the configured steel ball (3) is position-limitingly connected to the outer ring (1) and the inner ring (2).

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