Thrust self-aligning roller bearing

Abstract

The utility model relates to the technical field of bearings, in particular to a thrust self-aligning roller bearing, which comprises a shaft washer, a seat ring, a bushing, a retainer and a rolling body, an outer raceway is formed in the outer side of the shaft washer, and a U-shaped groove is formed in the inner side of the shaft washer; an inner raceway is formed in the inner side of the seat ring; the lining is arranged on the inner side of the seat ring and comprises a first end and a second end which are far away from each other, a plurality of limiting screws are detachably fixed to the first end, the ends of the limiting screws extend into the U-shaped grooves, and one sides of the ends of the limiting screws abut against the side walls of the U-shaped grooves; the retainer is arranged at the second end part; and the rolling body is arranged between the inner raceway and the outer raceway. The thickness of the first end portion of the bush does not need to be reduced, in the using process of the bearing, the risks that the bush falls off and loses efficacy are reduced, in addition, compared with a bush rolling mode in a traditional mode, a limiting screw is installed at the first end portion of the bush, installation is convenient and fast, and stress concentration can be effectively avoided through the U-shaped groove.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, and specifically relates to a spherical roller thrust bearing. Background Art

[0002] The spherical roller thrust bearing is used to bear the axial load mainly, and the combined axial and radial load, but the radial load shall not exceed 55% of the axial load. Compared with other spherical roller thrust bearings, this kind of bearing has a lower friction coefficient, a higher rotational speed, and has self-aligning performance.

[0003] The traditional spherical roller thrust bearing includes structures such as a raceway ring, a shaft ring, rolling elements and a bushing, etc. The fixing method of the bushing and the shaft ring is realized by rolling the upper end of the bushing into the 90° groove of the shaft ring. When assembling the bearing (rolling the bushing), it is relatively difficult. If the thickness of the upper end of the bushing is reduced by about half of the original thickness for the convenience of rolling, during the use of the bearing, there will be a situation where the bushing falls off and fails, which will further cause the risk of bearing failure and cannot meet the use requirements. Content of the Utility Model

[0004] In view of the defects of the prior art, the utility model provides a spherical roller thrust bearing, which can be conveniently installed and can reduce the risk of the bushing falling off and failing.

[0005] In order to achieve the above purpose, the technical solution provided by the utility model is a spherical roller thrust bearing, which includes a shaft ring, a raceway ring, a bushing, a cage and rolling elements; an outer raceway is provided on the outer side of the shaft ring, and a U-shaped groove is provided on the inner side of the shaft ring; an inner raceway is provided on the inner side of the raceway ring; the bushing is arranged on the inner side of the raceway ring, the bushing includes a first end and a second end which are far away from each other, a plurality of limit screws are detachably fixed to the first end, the end of the limit screw extends into the U-shaped groove, and one side of the end of the limit screw presses against the side wall of the U-shaped groove; the cage is arranged on the second end; the rolling elements are installed between the inner raceway and the outer raceway.

[0006] Further, the end of the limit screw extending into the U-shaped groove is a conical surface, and the conical surface presses against the side wall of the U-shaped groove.

[0007] Further, the axis of the limit screw is perpendicular to the axis of the bushing.

[0008] Further, the plurality of limit screws are evenly arranged along the circumferential direction on the first end of the bushing.

[0009] Further, the number of the limit screws is four, six or eight.

[0010] Further, the plurality of limit screws are evenly distributed along the circumferential direction of the first end.

[0011] Further, the outer diameter of the first end portion is provided as an inclined surface.

[0012] Advantages of the present utility model: An inner side of the shaft ring of the above-mentioned spherical roller thrust bearing is provided with a U-shaped groove. By fixing a limit screw at the first end portion of the bushing and pressing the end portion of the limit screw against the side wall of the U-shaped groove, the fitting of the bushing on the shaft ring is completed. In this fitting method, the thickness of the first end portion of the bushing does not need to be thinned. During the use of the bearing, the risk of the bushing falling off and failing is reduced, and the use requirements can be met. In addition, compared with the traditional method of rolling the bushing, installing the limit screw at the first end portion of the bushing is more convenient. The U-shaped groove can more effectively avoid stress concentration, improve the reliability of the shaft ring, and extend the service life of the bearing. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of a spherical roller thrust bearing in an embodiment of the present utility model;

[0014] Figure 2 is a partial schematic diagram of the fixed position of the bushing and the shaft ring in an embodiment of the present utility model;

[0015] In the figure:

[0016] 100, shaft ring, 110, outer raceway, 120, U-shaped groove,

[0017] 200, seat ring, 210, inner raceway,

[0018] 300, bushing, 310, first end portion, 311, limit screw, 311a, conical surface, 312, inclined surface, 320, second end portion,

[0019] 400, cage,

[0020] 500, rolling element. Detailed Embodiments

[0021] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model is given with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0022] See Figure 1, in an embodiment of the present utility model, a spherical roller thrust bearing is shown, which includes an inner ring 100, an outer ring 200, a bushing 300, a cage 400 and rolling elements 500; an outer raceway 110 is provided on the outer side of the inner ring 100, and a U-shaped groove 120 is provided on the inner side of the inner ring 100; an inner raceway 210 is provided on the inner side of the outer ring 200; the bushing 300 is arranged on the inner side of the outer ring 200, the bushing 300 includes a first end 310 and a second end 320 which are away from each other, a plurality of limit screws 311 are detachably fixed to the first end 310, the end of the limit screw 311 extends into the U-shaped groove 120, and one side of the end of the limit screw 311 abuts against the side wall of the U-shaped groove 120; the cage 400 is arranged on the second end 320; the cage 400 is installed between the inner raceway 210 and the outer raceway 110.

[0023] The inner side of the inner ring 100 of the above spherical roller thrust bearing is provided with a U-shaped groove 120. By fixing the limit screws 311 to the first end 310 of the bushing 300 and pressing the end of the limit screw 311 against the side wall of the U-shaped groove 120, the fitting of the bushing 300 on the inner ring 100 is completed. In this fitting method, the thickness of the first end 310 of the bushing 300 does not need to be thinned. During the use of the bearing, the risk of the bushing falling off and failing is reduced, which can meet the use requirements. In addition, compared with the traditional method of rolling the bushing, installing the limit screws 311 at the first end 310 of the bushing 300 is more convenient. In the above technical solution, a groove is provided on the inner side of the inner ring 100, and the shape of the groove is set to be U-shaped, which can effectively avoid the risk of stress concentration at the bottom of the groove, and improve the structural reliability of the inner ring 100.

[0024] In an embodiment, the end of the limit screw 311 extending into the U-shaped groove 120 is a conical surface 311a, and the conical surface 311a abuts against the side wall of the U-shaped groove 120.

[0025] In an embodiment, the axis of the limit screw 311 is perpendicular to the axis of the bushing 300.

[0026] In an embodiment, a plurality of limit screws 311 are evenly arranged along the circumferential direction on the first end 310 of the bushing 300.

[0027] In an embodiment, the limit screws 311 are provided with four, six or eight, etc., and the specific number is determined according to the size of the bearing.

[0028] In an embodiment, a plurality of limit screws 311 are evenly distributed along the circumferential direction of the first end 310.

[0029] In one embodiment, the outer diameter of the first end portion 310 is provided as an inclined surface 312. In this embodiment, when the outer diameter of the first end portion 310 is set as the inclined surface 312, it is convenient to mount the shaft ring 100 on the first end portion 310, and the installation is relatively convenient.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0032] In the present invention, unless otherwise clearly specified and defined, the terms "mount", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature. It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

Claims

1. A thrust self-aligning roller bearing, characterized in that: including a shaft ring with an outer raceway formed on the outer side and a U-shaped groove formed on the inner side; a housing ring with an inner raceway formed on the inner side; a bushing disposed inside the housing ring. The bushing includes a first end and a second end which are away from each other. A plurality of limit screws are detachably fixed to the first end, and the ends of the limit screws extend into the U-shaped groove, and one side of the end of the limit screw abuts against the side wall of the U-shaped groove; a cage disposed at the second end; rolling elements installed between the inner raceway and the outer raceway.

2. The thrust self-aligning roller bearing according to claim 1, wherein: The end of the limit screw extending into the U-shaped groove is a conical surface, and the conical surface abuts against the side wall of the U-shaped groove.

3. A thrust self-aligning roller bearing according to claim 1, characterized in that: The axis of the limit screw is perpendicular to the axis of the bushing.

4. A thrust self-aligning roller bearing according to claim 1, characterized in that: The plurality of limit screws are evenly arranged along the circumferential direction at the first end of the bushing.

5. The thrust self-aligning roller bearing according to claim 4, characterized in that: There are four, six or eight limit screws.

6. The thrust self-aligning roller bearing according to claim 4, characterized in that: The plurality of limit screws are evenly distributed along the circumferential direction of the first end.

7. A thrust self-aligning roller bearing according to claim 1, characterized in that: The outer diameter of the first end is set as an inclined surface.

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