Split cylindrical roller bearing

Abstract

The utility model relates to the technical field of cylindrical roller bearings, in particular to a split cylindrical roller bearing which is characterized in that an inner ring raceway is formed in the outer diameter of an inner ring; an outer ring raceway is formed in the inner diameter of the outer ring; the retainer assembly is arranged between the inner ring raceway and the outer ring raceway, and comprises a retainer main body provided with a plurality of hole beams, a retainer check ring detachably fixed on the retainer main body, and middle spacing blocks detachably fixed on the hole beams; the first roller, the second roller and the third roller are all mounted between the inner ring raceway and the outer ring raceway and are limited between two adjacent hole beams; the first roller, the second roller and the third roller are sequentially and closely arranged in the length direction, and at least two of the first roller, the second roller and the third roller are different in length. The utility model has the advantages of smaller volume and higher bearing capacity, and is suitable for the condition that the equipment installation space is limited.

Description

Technical Field

[0001] The utility model relates to the technical field of cylindrical roller bearings, in particular to a split cylindrical roller bearing. Background Art

[0002] Usually, double-row split cylindrical roller bearings consist of two single-row split cylindrical roller bearings with a spacer in between. This arrangement inevitably occupies a large volume in the equipment, making it difficult to meet the requirements of limited installation space for special equipment, thus affecting its use. In order to save space, some split cylindrical roller bearings adopt a structure without spacers, but the rollers in this structure are not arranged side by side, and a rib is provided in the middle, which results in a shorter roller size and lower load. Utility Model Content

[0003] In view of the defects of the prior art, the utility model provides a split cylindrical roller bearing, which has a small size and a high load-bearing capacity and is suitable for conditions where equipment installation space is limited. At the same time, a positioning pin hole is designed to meet the equipment's requirements for inner ring installation and positioning to prevent the inner ring from axial movement during rotation, thereby avoiding affecting the bearing's service life.

[0004] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is a split cylindrical roller bearing, which includes an inner ring, an outer ring, a cage assembly, a first roller, a second roller and a third roller, the outer diameter of the inner ring is provided with an inner ring raceway; the inner diameter of the outer ring is provided with an outer ring raceway; the cage assembly is arranged between the inner ring raceway and the outer ring raceway, the cage assembly includes two semicircular cage bodies, a cage retaining ring detachably fixed to the cage body, and an intermediate spacer block fixing the two semicircular cage bodies as a whole, the cage body is provided with a plurality of hole beams; the first roller, the second roller and the third roller are all installed between the inner ring raceway and the outer ring raceway and are limited between two adjacent hole beams; the first roller, the second roller and the third roller are arranged closely in sequence in the length direction, and at least two of the first roller, the second roller and the third roller have different lengths.

[0005] Furthermore, the lengths of the first roller and the second roller are equal and smaller than the length of the third roller.

[0006] Furthermore, the third roller is arranged on a side close to the retaining ring of the retaining frame.

[0007] Furthermore, the third rollers in two adjacent rows of rollers are respectively close to different ends of the bearing.

[0008] Furthermore, the inner ring includes two obliquely split half rings.

[0009] Furthermore, a positioning pin hole is provided in the half ring near the splitting port, and the positioning pin hole is used to cooperate with a device to axially position the inner ring.

[0010] Furthermore, two positioning pin holes are provided, each of which is arranged close to the end surface of the half circle.

[0011] The beneficial effects of the utility model are as follows: three rows of long and short rollers are staggered inside the bearing, which neither reduces the bearing load requirements nor has a continuous roller gap. The stress state of the middle part of the inner ring raceway and the outer ring raceway is improved, the raceway is evenly stressed, and cracks are not easily generated, thereby increasing the service life of the bearing. Without reducing the load-bearing capacity, the above-mentioned split cylindrical roller bearing does not have a continuous roller gap, is relatively small in size, does not occupy a large space in the equipment, and is suitable for conditions where equipment installation is limited. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0013] Figure 2 This is a schematic diagram of the structure of the inner ring in one embodiment of the utility model;

[0014] Figure 3 for Figure 1 A cross-sectional view of the middle cage assembly AA;

[0015] In the figure: 100, inner ring, 110, inner ring raceway, 120, half ring, 121, positioning pin hole,

[0016] 200, outer ring, 210, outer ring raceway,

[0017] 300, cage assembly, 310, cage body, 311, hole beam, 320, cage retaining ring, 330, middle spacer,

[0018] 400, first roller,

[0019] 500, second roller,

[0020] 600. Third roller. 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 a split cylindrical roller bearing in one embodiment of the utility model, which includes an inner ring 100, an outer ring 200, a cage assembly 300, a first roller 400, a second roller 500 and a third roller 600. The outer diameter of the inner ring 100 is provided with an inner ring raceway 110; the inner diameter of the outer ring 200 is provided with an outer ring raceway 210; the cage assembly 300 is arranged between the inner ring raceway 110 and the outer ring raceway 210, and the cage assembly 300 includes two semicircular cage bodies 310, a cage retaining ring 320 detachably fixed to the cage body 310, and a middle spacer 330 fixing the two semicircular cage bodies 310 as a whole, and the cage body 310 is provided with a plurality of hole beams 311. The first roller 400, the second roller 500 and the third roller 600 are all installed between the inner ring raceway 110 and the outer ring raceway 210 and are limited between two adjacent hole beams 311; the first roller 400, the second roller 500 and the third roller 600 are arranged closely in sequence in the length direction, and at least two of the first roller 400, the second roller 500 and the third roller 600 have different lengths.

[0023] The split cylindrical roller bearing is a single-row three-row split cylindrical roller bearing, with three rows of long and short rollers staggered inside the bearing, which neither reduces the bearing load requirements nor has a continuous roller gap. The stress state of the middle of the inner ring raceway 110 and the outer ring raceway 210 is improved, the raceway is evenly stressed, and cracks are not easily generated, thereby increasing the service life of the bearing. Without reducing the load-bearing capacity, the split cylindrical roller bearing does not have a continuous roller gap, is small in size, does not occupy a large space in the equipment, and is suitable for conditions where equipment installation is limited.

[0024] It should be noted that under certain working conditions, if the bearing is set as a long roller, the ratio of the roller length to the diameter will exceed 2.5, which violates the design concept requirements of the cylindrical roller bearing. The bearing roller is easily damaged when subjected to radial force (the basis of the design concept: the ratio of the length to the diameter of the cylindrical roller is less than or equal to 2.5. If it is designed in a row, the ratio of the length to the diameter of the roller will be greater than 2.5). Therefore, under these working conditions, the three-roller structure in this embodiment can meet both the working condition requirements and the design concept requirements of the cylindrical roller bearing.

[0025] In one embodiment, the lengths of the first roller 400 and the second roller 500 are equal and smaller than the length of the third roller 600 .

[0026] In one embodiment, the third roller 600 is disposed on a side close to the retaining ring 320. This embodiment is suitable for an eccentric load working environment.

[0027] In another embodiment, the third rollers 600 in two adjacent rows of rollers are respectively close to different ends of the bearing.

[0028] It should be noted that in this embodiment, the rollers in two adjacent pockets of the cage are distributed as follows: two short and one long, or one long and two short. Such a distribution will make the raceway evenly stressed and less likely to produce cracks. In this embodiment, the long rollers of two adjacent rows of rollers are arranged on different sides. If the long rollers are arranged in the middle, the rollers in the cage pockets are all distributed in a short, long, and short distribution, and the stress is likely to be uneven, resulting in premature damage to the bearing.

[0029] See also Figure 2 In one embodiment, the inner ring 100 includes two obliquely split half rings 120 .

[0030] In one embodiment, a positioning pin hole 121 is provided near the splitting opening of the half ring 120, and the positioning pin hole 121 is used to cooperate with the equipment to axially position the inner ring 100. In this embodiment, a positioning pin hole 121 matching the equipment position is designed at the splitting opening of the inner ring to prevent the axial movement of the inner ring 100, further meeting the use requirements of the equipment.

[0031] Furthermore, in one embodiment, two positioning pin holes 121 are provided, and are respectively provided close to the end surface of the half circle 120. With such a configuration, the fixation is more stable and the force is more uniform.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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. A split cylindrical roller bearing, characterized in that: include Inner ring, with inner ring raceway on the outer diameter; The outer ring has an outer ring raceway on the inner diameter; A cage assembly is arranged between the inner ring raceway and the outer ring raceway, the cage assembly comprises two semicircular cage bodies, a cage retaining ring detachably fixed to the cage bodies, and a middle spacer fixing the two semicircular cage bodies as a whole, each of the cage bodies is provided with a plurality of hole beams; The first roller, the second roller and the third roller are all installed between the inner ring raceway and the outer ring raceway and are limited between two adjacent hole beams; the first roller, the second roller and the third roller are arranged closely in sequence in the length direction, and at least two of the first roller, the second roller and the third roller have different lengths.

2. A split cylindrical roller bearing according to claim 1, characterized in that: The lengths of the first roller and the second roller are equal and smaller than the length of the third roller.

3. A split cylindrical roller bearing according to claim 2, characterized in that: The third roller is arranged on a side close to the retaining ring of the retaining frame.

4. A split cylindrical roller bearing according to claim 2, characterized in that: The third rollers in two adjacent rows of rollers are respectively close to different ends of the bearing.

5. A split cylindrical roller bearing according to any one of claims 1 to 4, characterized in that: The inner ring includes two obliquely split half rings.

6. A split cylindrical roller bearing according to claim 5, characterized in that: The half ring is provided with a positioning pin hole near the splitting port, and the positioning pin hole is used to cooperate with equipment to axially position the inner ring.

7. A split cylindrical roller bearing according to claim 6, characterized in that: There are two positioning pin holes, which are respectively arranged close to the end surface of the half circle.

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