Asymmetric self-aligning roller bearing

Abstract

The utility model relates to the technical field of bearings, in particular to an asymmetric self-aligning roller bearing, which is characterized in that an inner ring is provided with a first inner ring raceway and a second inner ring raceway, the width of the first inner ring raceway is larger than that of the second inner ring raceway, and a limiting stop part is arranged between the first inner ring raceway and the second inner ring raceway; the limiting stop part is provided with a first surface connected with the second inner ring raceway and a second surface connected with the first surface, and the first surface is sleeved with a positioning spacer ring; the inner diameter of the first retainer is guided by the positioning spacer ring; one end face of the first spherical roller is stopped on the second surface of the limiting stop part; the second retainer is provided with a compensation guide part of which the inner diameter is guided by the positioning spacer ring; and one end surface of the second spherical roller is stopped at the positioning spacer ring. Aiming at the unbalance loading condition and when the bearing difference of the two rows is large, the bearing capacity of the two rows can be averaged, the overall service life of the bearing is prolonged, in addition, although the retainer is of an asymmetric structure, the retainer still has a reasonable guide surface, and the running stability of the bearing is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to an asymmetric spherical roller bearing. Background Art

[0002] Generally, ordinary spherical roller bearings are symmetrical in structure, that is, the rolling elements on both sides are the same size. Under special working conditions, there is a large difference in the load of the two rows. The unbalanced load condition causes one row to have a lower life and the other row to have a longer life, but the life of the entire bearing is determined by the side with the lower life. Therefore, when faced with high life requirements and insufficient space, symmetrical ordinary spherical roller bearings cannot meet the needs. Utility Model Content

[0003] In view of the defects of the prior art, the utility model provides an asymmetric spherical roller bearing, which can average the load-bearing capacity of the two rows when the load-bearing difference between the two rows is large in the case of eccentric loading, thereby improving the overall life of the bearing; in addition, although it is an asymmetric structure, the first retaining frame and the second retaining frame still have reasonable guide surfaces, which can further improve the stability of the operation of the asymmetric spherical roller bearing.

[0004] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is an asymmetric spherical roller bearing, which includes an outer ring, an inner ring, a first retaining frame, a first spherical roller, a second retaining frame and a second spherical roller; the outer ring is provided with an outer ring raceway; the inner ring is provided with a first inner ring raceway and a second inner ring raceway, the width of the first inner ring raceway is greater than the width of the second inner ring raceway, a limit stop portion is provided between the first inner ring raceway and the second inner ring raceway, the limit stop portion has a first surface connected to the second inner ring raceway and a second surface connected to the first surface, the second surface is connected to the first inner ring raceway, the first inner ring raceway is provided with a first inner ring raceway, and the second inner ring raceway is provided with a second inner ring raceway. A positioning spacer ring is sleeved on one surface; a first retaining frame is arranged between the first inner ring raceway and the outer ring raceway, and the inner diameter of the first retaining frame is guided by the positioning spacer ring; a first spherical roller is arranged in the pocket of the first retaining frame, and one end face of the first spherical roller is stopped by the second surface of the limit stop portion; a second retaining frame is arranged between the second inner ring raceway and the outer ring raceway, and the second retaining frame is provided with a compensation guide portion, and the inner diameter of the compensation guide portion is guided by the positioning spacer ring; a second spherical roller is arranged in the pocket of the second retaining frame, and one end face of the second spherical roller is stopped by the positioning spacer ring.

[0005] Further, a first guide portion is provided at one end of the first retaining frame, and the first guide portion is guided by the first inner ring raceway.

[0006] Further, the second retaining frame is provided with a second guide portion away from the compensation guide portion, and the second guide portion is guided by the second inner ring raceway.

[0007] Furthermore, the shortest distance from the maximum diameter position of the first spherical roller to the inner diameter of the inner ring is D1, and the shortest distance from the maximum diameter position of the second spherical roller to the inner diameter of the inner ring is D2, and D1 is smaller than D2.

[0008] Furthermore, the outer ring is an integrated outer ring.

[0009] Furthermore, the inner ring is an integrated double-raceway inner ring.

[0010] Furthermore, the positioning spacer ring has a third surface, and the third surface is used to guide the inner diameter of the first retaining frame and the inner diameter of the compensating guide portion of the second retaining frame.

[0011] The beneficial effects of the utility model are as follows: a first spherical roller and a second spherical roller are provided, the two rolling bodies are of different sizes and are arranged in an asymmetric form. For the eccentric load situation, when the load difference between the two rows is large, the load capacity of the two rows can be averaged, thereby improving the overall life of the bearing. In addition, in order to improve the operation stability of the asymmetric spherical roller bearing, an asymmetric first cage and a second cage are provided according to the structure of the asymmetric rolling body, the inner diameter of the first cage is guided by a positioning spacer ring, and the second cage is provided with a compensation guide part, and the inner diameter of the compensation guide part is guided by a positioning spacer ring; although the size of the second spherical roller is small, it can still ensure that the second spherical roller can be maintained in the middle position of the second cage, and a positioning spacer ring and a compensation guide part are provided so that the positioning spacer ring can adapt to and guide the second cage. In addition, for the first spherical roller of larger size, a first cage is provided, and no guide part is provided at the end of the first cage, and the inner diameter is directly matched with the positioning spacer ring. In this way, the first cage and the second cage both have reasonable guide surfaces, which can further improve the operation stability of the asymmetric spherical roller bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic structural diagram of an asymmetric spherical roller bearing in one embodiment of the utility model;

[0013] In the figure:

[0014] 100, outer ring, 110, outer ring raceway,

[0015] 200, inner ring, 210, first inner ring raceway, 220, second inner ring raceway, 230, limit stopper, 231, first surface, 232, second surface,

[0016] 300, first retaining frame, 310, first guide portion,

[0017] 400, the first spherical roller,

[0018] 500, second retaining frame, 510, compensation guide portion, 520, second guide portion,

[0019] 600, second spherical roller,

[0020] 700. Positioning spacer ring. 710. Third surface. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0022] See also Figure 1 , shows an asymmetric spherical roller bearing in one embodiment of the utility model, which includes an outer ring 100, an inner ring 200, a first retainer 300, a first spherical roller 400, a second retainer 500 and a second spherical roller 600; the outer ring 100 is provided with an outer ring raceway 110; the inner ring 200 is provided with a first inner ring raceway 210 and a second inner ring raceway 220, the width of the first inner ring raceway 210 is greater than the width of the second inner ring raceway 220, a limit stop portion 230 is provided between the first inner ring raceway 210 and the second inner ring raceway 220, the limit stop portion 230 has a first surface 231 connected to the second inner ring raceway 220 and a second surface 232 connected to the first surface 231, the second surface 232 is connected to the first inner ring raceway 210 Then, a positioning ring 700 is sleeved on the first surface 231; the first retaining frame 300 is arranged between the first inner ring raceway 210 and the outer ring raceway 110, and the inner diameter of the first retaining frame 300 is guided by the positioning ring 700; the first spherical roller 400 is arranged in the pocket of the first retaining frame 300, and one end face of the first spherical roller 400 is stopped by the second surface 232 of the limit stop portion 230; the second retaining frame 500 is arranged between the second inner ring raceway 220 and the outer ring raceway 110, and the second retaining frame 500 is provided with a compensation guide portion 510, and the inner diameter of the compensation guide portion 510 is guided by the positioning ring 700; the second inner ring raceway 220 is arranged in the pocket of the second retaining frame 500, and one end face of the second spherical roller 600 is stopped by the positioning ring 700.

[0023] The above-mentioned asymmetric spherical roller bearing is provided with a first spherical roller 400 and a second spherical roller 600. The two rolling elements are of different sizes and are arranged in an asymmetric form. In the case of eccentric load, when the load difference between the two rows is large, the load capacity of the two rows can be averaged to improve the overall life of the bearing. In addition, an asymmetric first retainer 300 and a second retainer 500 are arranged according to the structure of the asymmetric rolling element. The inner diameter of the first retainer 300 is guided by a positioning spacer ring 700, and the second retainer 500 is provided with a compensation guide part 510. The inner diameter of the compensation guide part 510 is guided by the positioning spacer ring 700. Although the size of the second spherical roller 600 is small, it can still ensure that the second spherical roller 600 can be maintained in the middle position of the second retainer 500, and the positioning spacer ring 700 and the compensation guide part 510 are arranged so that the positioning spacer ring 700 can adapt to and guide the second retainer 500. In addition, for the first spherical roller 400 of a larger size, a first retainer 300 is provided, and no guide portion is provided at the end of the first retainer 300, and the inner diameter is directly matched with the positioning spacer 700. In this way, both the first retainer 300 and the second retainer 500 have reasonable guide surfaces, which can further improve the stability of the asymmetric spherical roller bearing. It should be noted that after the modification, the size and number of the two rows of rollers can be selected according to the specific working conditions, and the life of the two rows can be made consistent as much as possible. The outer ring 100 satisfies the spherical alignment, and a suitable outer ring raceway 110 diameter needs to be selected. The first inner ring raceway 210 and the second inner ring raceway 220 on both sides of the inner ring 200 are asymmetric.

[0024] In one embodiment, a first guide portion 310 is disposed at one end of the first retaining frame 300 , and the first guide portion 310 is guided by the first inner ring raceway 210 .

[0025] In one embodiment, the second retaining frame 500 is provided with a second guide portion 520 away from the compensating guide portion 510 , and the second guide portion 520 is guided by the second inner ring raceway 220 .

[0026] In one embodiment, the shortest distance from the maximum diameter position of the first spherical roller 400 to the inner diameter of the inner ring is D1, and the shortest distance from the maximum diameter position of the second spherical roller 600 to the inner diameter of the inner ring is D2, and D1 is smaller than D2. It should be noted that the first spherical roller 400 is not only longer than the second spherical roller 600, but also has a larger maximum diameter than the second spherical roller 600. Such a configuration can further improve the load-bearing capacity of one side of the first spherical roller 400, and is more suitable for eccentric load scenarios. The above-mentioned asymmetric spherical roller bearing changes the load-bearing capacity of the two rows of bearings by changing the size of the two rows of rollers and the specific internal structure, thereby improving the overall life of the bearing.

[0027] In one embodiment, the outer ring 100 is an integral outer ring.

[0028] In one embodiment, the inner ring 200 is an integrated double-raceway inner ring. The asymmetric spherical roller bearing has the outer ring 100 and the inner ring 200 as an integrated structure, which reduces the number of components, can further improve the stability of the bearing operation, and is more convenient for processing and spare parts.

[0029] In one embodiment, the positioning spacer ring 700 has a third surface 710 , and the third surface 710 is used to guide the inner diameter of the first retaining frame 300 and the inner diameter of the compensating guide portion 510 of the second retaining frame 500 .

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

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

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, 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 specified and limited, the first feature "above" or "below" the second feature may be 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 "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be a central 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 a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

Claims

1. An asymmetric spherical roller bearing, characterized in that: include The outer ring is provided with an outer ring raceway; The inner ring is provided with a first inner ring raceway and a second inner ring raceway, the width of the first inner ring raceway is greater than the width of the second inner ring raceway, a limit stop portion is provided between the first inner ring raceway and the second inner ring raceway, the limit stop portion has a first surface connected with the second inner ring raceway and a second surface connected with the first surface, the second surface is connected with the first inner ring raceway, and a positioning spacer ring is sleeved on the first surface; A first retainer, disposed between the first inner ring raceway and the outer ring raceway, wherein the inner diameter of the first retainer is guided by the positioning spacer ring; A first spherical roller is disposed in the pocket of the first retaining frame, and one end surface of the first spherical roller is stopped on the second surface of the limit stop portion; A second retainer is provided between the second inner ring raceway and the outer ring raceway, the second retainer is provided with a compensation guide portion, and the inner diameter of the compensation guide portion is guided by the positioning spacer ring; and The second spherical roller is arranged in the pocket of the second retaining frame, and one end surface of the second spherical roller is stopped by the positioning spacer ring.

2. The asymmetric spherical roller bearing according to claim 1, characterized in that: A first guide portion is provided at one end of the first retaining frame, and the first guide portion is guided by the first inner ring raceway.

3. The asymmetric spherical roller bearing according to claim 1, characterized in that: The second retaining frame is provided with a second guide portion away from the compensating guide portion, and the second guide portion is guided by the second inner ring raceway.

4. The asymmetric spherical roller bearing according to claim 1, characterized in that: The shortest distance from the maximum diameter position of the first spherical roller to the inner diameter of the inner ring is D1, and the shortest distance from the maximum diameter position of the second spherical roller to the inner diameter of the inner ring is D2, and D1 is smaller than D2.

5. The asymmetric spherical roller bearing according to claim 1, characterized in that: The outer ring is an integrated outer ring.

6. The asymmetric spherical roller bearing according to claim 1, characterized in that: The inner ring is an integrated double-raceway inner ring.

7. The asymmetric spherical roller bearing according to claim 1, characterized in that: The positioning spacer ring has a third surface, and the third surface is used to guide the inner diameter of the first retaining frame and the inner diameter of the compensation guide portion of the second retaining frame.

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