Sintering-resistant high-speed tapered roller bearing

Abstract

The utility model discloses a sintering-resistant high-speed tapered roller bearing, which relates to the field of new energy automobile gear transmission systems and comprises a bearing retainer, and a plurality of rolling body accommodating grooves are formed in the bearing retainer at intervals; the bearing rolling bodies are arranged in the rolling body containing grooves, one bearing rolling body is arranged in each rolling body containing groove, and oil storage holes are formed in the bearing rolling bodies; the bearing outer ring is clamped on the bearing retainer outer ring; and the bearing inner ring is rotationally arranged on the bearing retainer inner ring through the bearing rolling body. The problem that in the prior art, lubricating oil on the surface of a tapered roller bearing in high-speed operation is difficult to supplement in time, and consequently the situation that the tapered roller bearing is blocked easily occurs is solved.

Description

Technical Field

[0001] This utility model relates to the field of gear transmission systems for new energy vehicles, specifically to a sintering-resistant high-speed tapered roller bearing. Background Technology

[0002] Tapered roller bearings are mostly used in low-to-medium speed environments, but new energy vehicles have put forward new requirements for the operating environment of tapered roller bearings, requiring tapered roller bearings to operate at higher speeds, specifically 15,000 rpm to 20,000 rpm.

[0003] However, the lubricating oil on the surface of tapered roller bearings is difficult to replenish in time when they are running at high speeds, which can easily lead to jamming and make them inconvenient to use. Utility Model Content

[0004] This application provides a sintering-resistant high-speed tapered roller bearing, which can solve the technical problem in the prior art where the surface lubricating oil of tapered roller bearings is difficult to replenish in time under high-speed operation, thus easily causing tapered roller bearing jamming.

[0005] This application provides a sintering-resistant high-speed tapered roller bearing, which includes:

[0006] A bearing retainer, wherein a plurality of rolling element receiving grooves are spaced apart on the bearing retainer;

[0007] The bearing rolling element is disposed in the rolling element receiving groove, and each rolling element receiving groove is provided with one bearing rolling element, and the bearing rolling element is provided with an oil storage cavity.

[0008] The bearing outer ring is snapped into the bearing retainer outer ring;

[0009] And, the bearing inner ring, which is rotatably disposed in the bearing retainer inner ring via the bearing rolling elements.

[0010] In one embodiment, an inner ring retainer is provided at one end of the inner ring of the bearing, the bearing rolling element abuts against the inner ring retainer, and the oil reservoir is provided on the abutment surface where the bearing rolling element abuts against the inner ring retainer.

[0011] In one embodiment, the contact point E between the bearing rolling element and the inner ring retaining edge is located at 1 / 2 to 1 / 3 of the distance from the inner ring of the bearing towards the outer ring of the bearing in the vertical direction of the inner ring retaining edge.

[0012] In one embodiment, the top edge of the contact surface between the inner ring retaining edge and the bearing rolling element is provided with a chamfered inclined surface facing the bearing rolling element.

[0013] In one embodiment, the outer raceway surface of the bearing outer ring, the inner raceway surface of the bearing inner ring, and the outer diameter surface of the bearing rolling elements are all provided with curved arcs.

[0014] In one embodiment, the curvature range of the outer raceway surface, the inner raceway surface, and the outer diameter surface is set to 5-30 μm.

[0015] In one embodiment, the roughness of the bearing outer ring surface, the bearing inner ring surface, and the bearing rolling element surface is all less than or equal to 0.1 μm.

[0016] In one embodiment, a first oil reservoir is provided on the retainer side beam of the bearing retainer.

[0017] In one embodiment, a second oil reservoir is provided at a distance from the base of the bearing retainer.

[0018] In one embodiment, the bearing outer ring, the bearing inner ring, and the bearing rolling elements are all made of high-carbon chromium bearing steel.

[0019] The beneficial effects of the technical solutions provided in this application include:

[0020] By adding oil reservoirs to the rolling elements of the bearing, the lubricating oil in the reservoirs can flow out when the inner ring of the bearing rolls relative to the outer ring of the bearing, so as to lubricate the surface of the rolling elements and replenish the surface of the rolling elements in a timely manner. This solves the problem in the prior art that the surface lubricating oil of tapered roller bearings under high-speed operation is difficult to replenish in time, which easily leads to the jamming of tapered roller bearings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a cross-sectional view of a sintering-resistant high-speed tapered roller bearing according to this application;

[0023] Figure 2 This is a cross-sectional view of the connection between the bearing inner ring and the bearing rolling elements in this application;

[0024] Figure 3 for Figure 2 A magnified view of part A in the middle;

[0025] Figure 4This is a schematic diagram of the bearing retainer.

[0026] In the figure: 1. Bearing retainer; 11. Rolling element receiving groove; 12. Retainer side beam; 121. First oil reservoir; 122. Second oil reservoir; 2. Bearing rolling element; 21. Oil reservoir; 22. Outer diameter surface; 3. Bearing outer ring; 31. Outer raceway surface; 4. Bearing inner ring; 41. Inner ring retaining edge; 42. Inner raceway surface. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0028] This application provides a sintering-resistant high-speed tapered roller bearing, which solves the problem in the prior art where the surface lubricating oil of tapered roller bearings is difficult to replenish in time under high-speed operation, thus easily causing tapered roller bearing jamming.

[0029] Reference Figure 1 This application discloses a sintering-resistant high-speed tapered roller bearing, comprising a bearing cage 1, bearing rolling elements 2, an outer bearing ring 3, and an inner bearing ring 4. The bearing cage 1 has multiple rolling element receiving grooves 11 spaced apart along its circumference. Each rolling element 2 is engaged within one of these grooves, and each rolling element 2 has an oil reservoir 21. The outer bearing ring 3 is engaged with the outer ring of the bearing cage 1, and the inner bearing ring 4 is engaged with the inner ring of the bearing cage 1, and is rotatably mounted on the inner ring of the bearing cage 1 via the rolling elements 2. Because the bearing rolling element 2 has an oil reservoir 21, when the sintering high-speed tapered roller bearing rotates, the inner ring 4 of the bearing rotates relative to the multiple bearing rolling elements 2 on the bearing cage 1. The oil reservoir 21 can store lubricating oil, and during the rotation of the sintering high-speed tapered roller bearing, it flows out of the oil reservoir 21 under the influence of centrifugal force to lubricate the surface of the bearing rolling element 2, thereby timely replenishing the lubrication of the surface of the bearing rolling element 2. This solves the problem in the prior art that the surface lubricating oil of the tapered roller bearing under high-speed operation is difficult to replenish in time, which easily leads to the tapered roller bearing jamming.

[0030] Reference Figure 2One end of the bearing inner ring 4 is provided with an inner ring retainer 41. In one embodiment of this application, the inner ring retainer 41 is specifically provided at the end of the bearing inner ring 4 away from the bearing outer ring 3. The inner ring retainer 41 can reduce the possibility of the bearing inner ring 4 coming out of the bearing retainer 1 during high-speed rotation, making the engagement of the bearing inner ring 4 more stable and enhancing the overall structural strength of the sintering-resistant high-speed tapered roller bearing. This makes the engagement state of the bearing inner ring 4 more stable and reliable, thereby extending the service life of the sintering-resistant high-speed tapered roller bearing and improving the safety factor of mechanical operation. The bearing rolling element 2 abuts against the inner ring retainer 41. The oil reservoir 21 is specifically provided on the abutment surface where the bearing rolling element 2 and the inner ring retainer 41 abut, so that the lubricating oil in the oil reservoir 21 can flow to the inner ring retainer 41. This not only provides sufficient lubrication for the contact area between the bearing rolling element 2 and the inner ring retainer 41, reducing friction loss, but also greatly enhances the lubrication capacity of the entire sintering-resistant high-speed tapered roller bearing structure.

[0031] More specifically, refer to Figure 2 and Figure 3 The contact point E between the bearing rolling element 2 and the inner ring retainer 41 is located at 1 / 2 to 1 / 3 of the vertical direction from the inner ring 4 towards the outer ring 3. By positioning the contact point E relatively close to the inner ring 4 in the vertical direction, the radius of the lever arm of the frictional force between the inner ring 4 and the rolling element 2 is reduced when the inner ring 4 rotates, thereby reducing the frictional torque, lowering heat generation, and improving the bearing's resistance to sintering. Furthermore, the top edge of the contact surface between the inner ring retainer 41 and the rolling element 2 is provided with a chamfered inclined surface facing the rolling element 2. This allows lubricating oil flowing from the oil reservoir 21 to be directed towards the axial direction of the inner ring retainer 41 closer to the inner ring 4, i.e., the contact point E, due to the enormous frictional and impact forces borne by the inner ring 4 during rotation. Since contact point E is a high-risk area for wear and failure in sintering-resistant high-speed tapered roller bearings. Guided by the chamfered inclined surface, the lubricating oil can penetrate and cover the contact point E more effectively, and form a continuous lubricating film when the sintered high-speed tapered roller bearing rotates at high speed, reducing the coefficient of friction, thereby reducing wear and extending the service life of the sintered high-speed tapered roller bearing.

[0032] Furthermore, if the chamfered angle is too small, it may not provide sufficient guiding force, making it difficult for the lubricating oil to flow effectively to the target area; if the angle is too large, it may cause the lubricating oil to deviate excessively, and may even affect the overall stability and dynamic performance of the sintering-resistant high-speed tapered roller bearing. Based on a comprehensive consideration of a large amount of experimental data and engineering practice experience, in one embodiment of this application, the chamfered angle is specifically set to 10° to 30°, so that the lubricating oil flows towards the contact surface between the inner ring retaining edge 41 and the bearing rolling element 2, thereby providing lubrication to the contact point E.

[0033] Furthermore, the outer raceway surface 31 of the outer ring 3, the inner raceway surface 42 of the inner ring 4, and the outer diameter surface 22 of the rolling element 2 are all provided with curved arcs, thereby reducing the contact area between the outer raceway surface 31 of the outer ring 3 and the inner raceway surface 42 of the inner ring 4 and the outer diameter surface 22 of the rolling element 2. The direct benefit of reducing the contact area is that it effectively reduces the frictional heat generated during friction. When two contact surfaces move relative to each other, due to the microscopic unevenness of the surfaces, a large amount of frictional resistance is generated, which is then converted into heat energy. The smaller the contact area, the less frictional resistance needs to be overcome, and therefore the less frictional heat is generated. Therefore, reducing the contact area between the outer raceway surface 31 of the outer ring 3 and the inner raceway surface 42 of the inner ring 4 and the outer diameter surface 22 of the rolling element 2 not only helps maintain the normal operating temperature of the sintered high-speed tapered roller bearing and reduces the possibility of performance degradation due to overheating, but also improves the operating efficiency and reliability of the sintered high-speed tapered roller bearing.

[0034] In one embodiment of this application, the curvature range between the outer raceway surface 31 of the outer ring 3 and the inner raceway surface 42 of the inner ring 4 and the outer diameter surface 22 of the rolling element 2 is set to 5-30 μm. Furthermore, to reduce the friction between the inner ring retainer 41 and the rolling element 2, the contact surface between the inner ring retainer 41 and the rolling element 2 can also be provided with a curvature. Considering that the contact area between the inner ring retainer 41 and the rolling element 2 is relatively narrow, the curvature range of the inner ring retainer 41 should be even smaller, specifically set to 0-8 μm.

[0035] Furthermore, to improve the contact accuracy of the sintered high-speed tapered roller bearing during rotation, the surface roughness of the bearing outer ring 3, the bearing inner ring 4, and the bearing rolling element 2 is all less than or equal to 0.1 μm. This reduces friction and significantly minimizes the microscopic unevenness between the surface of the rolling element 2 and the surfaces of the bearing outer ring 3 and inner ring 4, thereby significantly reducing frictional resistance. Under high-speed operation, the reduction in friction not only effectively reduces energy consumption but also prevents heat accumulation caused by friction, reducing the possibility of material performance degradation and failure due to overheating.

[0036] Reference Figure 4 In order to further improve the amount of lubricating oil replenished during the rotation of the sintering-resistant high-speed tapered roller bearing, a first oil reservoir 121 is provided on the retainer side beam 12 of the bearing retainer 1, and a second oil reservoir 122 is provided at intervals on the base of the bearing retainer 1. By adding multiple first oil reservoirs 121 and second oil reservoirs 122, the amount of lubricating oil is increased, so as to replenish the lubrication in time when the sintering-resistant high-speed tapered roller bearing rotates at high speed, thereby reducing frictional heat generation.

[0037] More specifically, to extend the service life of the sintering-resistant high-speed tapered roller bearing, the outer ring 3, inner ring 4, and rolling elements 2 are all made of high-carbon chromium bearing steel. High-carbon chromium bearing steel contains high levels of carbon and chromium. The presence of carbon significantly improves the hardness and wear resistance of the outer ring 3, inner ring 4, and rolling elements 2, while chromium effectively enhances their corrosion resistance and high-temperature stability. Through appropriate heat treatment processes, such as quenching and tempering, the microstructure of the high-carbon chromium bearing steel can be further optimized, giving it both high strength and good toughness, while maintaining stable mechanical properties at high temperatures. Therefore, high-carbon chromium bearing steel is a superior choice for manufacturing structural components in sintering-resistant high-speed tapered roller bearings.

[0038] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0039] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A sintering-resistant high-speed tapered roller bearing, characterized in that, It includes: A bearing retainer (1) is provided with a plurality of rolling element receiving grooves (11) spaced apart. The bearing rolling element (2) is disposed in the rolling element receiving groove (11), and each rolling element receiving groove (11) is provided with one bearing rolling element (2). The bearing rolling element (2) is provided with an oil storage cavity (21). The bearing outer ring (3) is snapped into the outer ring of the bearing retainer (1); In addition, the bearing inner ring (4) is rotatably disposed in the inner ring of the bearing retainer (1) by means of the bearing rolling element (2).

2. The sintering-resistant high-speed tapered roller bearing according to claim 1, characterized in that: The bearing inner ring (4) has an inner ring retaining edge (41) at one end, the bearing rolling element (2) abuts against the inner ring retaining edge (41), and the oil reservoir (21) is located on the abutting surface where the bearing rolling element (2) abuts against the inner ring retaining edge (41).

3. A sintering-resistant high-speed tapered roller bearing according to claim 2, characterized in that: The contact point E between the bearing rolling element (2) and the inner ring retaining edge (41) is located at 1 / 2 to 1 / 3 of the distance from the inner ring (4) towards the outer ring (3) in the vertical direction of the inner ring retaining edge (41).

4. A sintering-resistant high-speed tapered roller bearing according to claim 2, characterized in that: The top edge of the contact surface between the inner ring retaining edge (41) and the bearing rolling element (2) is provided with a chamfered inclined surface facing the bearing rolling element (2).

5. A sintering-resistant high-speed tapered roller bearing according to claim 1, characterized in that: The outer raceway surface (31) of the outer ring (3) of the bearing, the inner raceway surface (42) of the inner ring (4) of the bearing, and the outer diameter surface (22) of the rolling element (2) of the bearing are all provided with curved arcs.

6. A sintering-resistant high-speed tapered roller bearing according to claim 5, characterized in that: The curvature range of the outer raceway surface (31), the inner raceway surface (42), and the outer diameter surface (22) is set to 5-30 μm.

7. A sintering-resistant high-speed tapered roller bearing according to claim 1, characterized in that: The surface roughness of the bearing outer ring (3), the bearing inner ring (4), and the bearing rolling element (2) is all less than or equal to 0.1 μm.

8. A sintering-resistant high-speed tapered roller bearing according to claim 1, characterized in that: The bearing retainer (1) has a first oil reservoir (121) on the retainer side beam (12).

9. A sintering-resistant high-speed tapered roller bearing according to claim 1, characterized in that: The bearing retainer (1) has a second oil reservoir (122) spaced apart on its base.

10. A sintering-resistant high-speed tapered roller bearing according to claim 1, characterized in that: The outer ring (3), the inner ring (4), and the rolling elements (2) of the bearing are all made of high-carbon chromium bearing steel.

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