Large-size self-aligning roller bearing with pillar welding retainer

Abstract

The utility model belongs to the technical field of bearings, and particularly relates to a large-size self-aligning roller bearing with a strut welding retainer, which comprises a bearing outer ring, a bearing inner ring and a retainer assembly, the outer ring is sleeved outside the inner ring, and the retainer assembly is arranged between the outer ring and the inner ring; the retainer assembly comprises a large gasket, a small gasket, a supporting column and rolling bodies evenly distributed in a retainer. A through hole is formed in the center of the rolling body, and the supporting column penetrates through the through hole. One end of the supporting column is in threaded connection with the large gasket. By arranging the large gasket with the two half structures, installation of the large gasket is facilitated, a step structure is arranged at the connecting position, the steps have a certain limiting function, threaded holes in the steps correspond to each other, the supporting column penetrates through the two gaskets at the same time, the supporting column and the two gaskets cannot move relatively after being tightened, machining is easy, installation is convenient, and the service life of the supporting column is prolonged. The strut welded retainer bearing has the advantages of higher bearing rated load, high bearing capacity, high reliability, simplicity in processing and assembling and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, and mainly relates to a large-size self-aligning roller bearing with a pillar-welded cage. Background Art

[0002] Self-aligning roller bearings are widely used in various mechanical equipment such as mines, steel mills, paper-making machines, roll presses, and speed reducers due to their strong load-bearing capacity, excellent self-aligning performance, and ability to compensate for concentricity errors caused by installation and shaft deformation. Currently, the cage structures of self-aligning roller bearings are mostly stamping cages and solid cages. The solid cages have single-claw and double-claw structures, and the materials are brass and steel, which are widely used in large and extra-large bearings. Since the outer ring raceway is an arc structure, the outer diameter of the cage should be smaller than the size of the arc opening at the outer ring end face, otherwise the cage cannot be installed inside the bearing outer ring during assembly; the traditional split self-aligning roller bearings mainly have two forms: pillar-welded cage structure and double-claw integral cage structure. Since the bearing is a split structure, the inner ring, outer ring, and cage are all in two halves, and there is no problem with difficult cage installation. For larger-size self-aligning roller bearings, such as those with an outer diameter of about 2 meters, which are usually used in heavy-load and low-speed working conditions, users require the bearings to have a high rated load. If stamping or solid cages are used, the rolling element size is large, the stamping cage plate thickness, size, and solid cage size are large, resulting in difficult processing. Moreover, considering the cage strength and beam width dimensions will lead to fewer rolling elements and low load-bearing capacity; when using a pillar-welded cage, the connection between the pillar and the washer does not require considering the beam width problem of the pocket. The distance between adjacent rolling elements can be appropriately reduced, there are more rolling elements, and the load-bearing capacity is high.

[0003] Patent No. 201520808473.4 discloses a high-load pillar-type welded cage self-aligning roller bearing, which is mainly assembled by an inner ring, an outer ring, two cages, two groups of rolling elements, and pillars. Its characteristics are as follows: the two cages are respectively installed between the inner ring and the outer ring, the two groups of rolling elements are respectively installed in the raceways formed by the outer ring and the inner ring, large washers and small washers are arranged on the cages, the pillars respectively pass through the pillar holes of the two groups of rolling elements, the threaded ends of the pillars are threadedly connected to the large washers, and the groove ends of the pillars are welded and fixed to the small washers. The clearance between the pillar holes of the rolling elements and the pillars is 4 - 5 mm. Although this application has the characteristic of high load-bearing capacity, due to the arc structure of its outer ring raceway, the installation problem of the large washer of the cage is not considered. The outer diameter of the large washer should be smaller than the size of the arc opening at the outer ring end face, otherwise the cage cannot be installed inside the bearing outer ring during assembly, thus affecting the load-bearing capacity and reliability is not high. Summary of the Utility Model

[0004] The object of the present utility model is to provide a large-sized self-aligning roller bearing with a strut welded cage, which can solve the problems of difficult cage processing, low load-carrying capacity and low reliability in the background art.

[0005] To achieve the object of the present utility model, the following technical solutions are adopted:

[0006] A large-sized self-aligning roller bearing with a strut welded cage, comprising an outer bearing ring, an inner bearing ring and a cage assembly; the outer ring is sleeved outside the inner ring, and the cage assembly is arranged between the outer ring and the inner ring; the cage assembly includes a large washer, a small washer and struts, as well as rolling elements evenly distributed in the cage; through holes are provided at the centers of the rolling elements, and the struts are arranged through the through holes; one end of the strut is threadedly connected to the large washer, and the other end passes through the small washer and is riveted thereto.

[0007] The large washer is integrally in a ring shape and has a split structure in two halves, and is formed by combining two half-large washers during installation; evenly distributed threaded holes are provided on the ring-shaped end surface of the large washer, and the openings of the two half-large washers are provided with steps.

[0008] The depth of the step is half of the thickness of the large washer, and a threaded hole corresponding to the position on the large washer is also provided at the center of the step.

[0009] The position of the starting line of the step at the edge of the step is located in the middle of the two threaded holes, and the step structures at both ends of the opening are arranged in opposite directions.

[0010] The small washer is in an integral ring-shaped structure, and evenly distributed strut holes are provided on its circumferential end surface.

[0011] The strut is in a cylindrical structure, one end thereof is a threaded structure, the threaded length is the same as the thickness of the large washer, and the other end is provided with a polygonal shape at the head.

[0012] Compared with the prior art, the beneficial effects of the present utility model are: by setting the connection part of the large washer with a split structure into a step structure, the step has a certain limiting effect, and the threaded holes on the step correspond to each other. The strut passes through both washers at the same time, and the two will not move relative to each other after being tightened. The large washer and the strut are both conventional structures, with simple processing and convenient installation, which can solve the problem of difficult cage installation caused by the outer diameter of the large washer being larger than the arc opening dimension of the outer ring end face raceway. Moreover, the strut welded cage bearing has the advantages of high bearing rated load, high load-carrying capacity, high reliability, simple processing and assembly, etc. Description of the Drawings

[0013] Figure 1 Structural schematic diagram of the present utility model.

[0014] Figure 2Schematic diagram of the structure of a half large washer of the present utility model.

[0015] Figure 3 Schematic diagram of the structure of the large washer after combination of the present utility model.

[0016] Figure 4 Schematic diagram of the structure of a small washer of the present utility model.

[0017] Figure 5 Schematic diagram of the structure of a support pillar of the present utility model.

[0018] In the figure: 1. outer ring, 2. rolling element, 3. support pillar, 4. inner ring, 5. large washer, 6. small washer, 7. half large washer, 8. threaded hole, 9. step, 10. step starting line, 11. support pillar hole. Specific implementation mode

[0019] The present utility model will be described in conjunction with the accompanying drawings.

[0020] As Figures 1 - 5 shown, a large-sized self-aligning roller bearing with a support pillar welded cage includes a bearing outer ring 1, a bearing inner ring 4, and a cage assembly; the outer ring 1 is sleeved outside the inner ring 4, and the cage assembly is arranged between the outer ring 1 and the inner ring 4; the cage assembly includes a large washer 5, a small washer 6, and a support pillar 3, as well as rolling elements 2 evenly distributed in the cage; a through hole is provided in the center of the rolling element 2, and the support pillar 3 is passed through the through hole; one end of the support pillar 3 is threadedly connected to the large washer 5, and the other end passes through the small washer 6 and is riveted to it; the small washer 6 is of an integral ring structure, and evenly distributed support pillar holes 11 are provided on its circumferential end surface, and the support pillar holes 11 are used to install the support pillar 3 and rivet it; the support pillar 3 is of a cylindrical structure, one end of which is a threaded structure, and the threaded length is the same as the thickness of the large washer 5, and the other end head is set in a polygonal shape, and a sleeve or an open-end wrench can be used to tighten the support pillar 3 when tightening to ensure reliable assembly; the large washer 5 is of an integral ring structure and is a two-half split structure, and is composed of two half large washers 7 during installation; evenly distributed threaded holes 8 are provided on the ring end surface of the large washer 5, and a step 9 is provided at the opening of the two half large washers 7; the depth of the step 9 is half of the thickness of the large washer 5, and a threaded hole 8 corresponding to the position on the large washer 5 is also provided at the center of the step 9; the position of the step starting line 10 at the edge of the step 9 is located in the middle of the two threaded holes 8 and is arranged in the opposite direction to the two ends of the step structure at the opening; here, by setting the step 9, it has a certain limiting effect, and a threaded hole 8 corresponding to the position on the large washer 5 is also provided at the center of the step 9, and the support pillar 3 can pass through both the large washer 5 and the small washer 6 at the same time, and the two will not move relative to each other after tightening, improving the overall stability of the bearing.

[0021] When the utility model is in use, by setting the large washer 5 into a two - half structure and setting the connection part of the large washer 5 into a step 9 structure, the step 9 has a certain limiting effect, and a threaded hole 8 corresponding to the position on the large washer 5 is also arranged at the center of the step 9. The pillar 3 passes through both washers at the same time. After being tightened, the two will not move relatively. The large washer 5 and the pillar 3 are both conventional structures, with simple processing and convenient installation. It can solve the problem that the installation of the cage is difficult because the outer diameter of the large washer 5 is larger than the size of the arc - shaped opening of the end face raceway of the outer ring 1. Moreover, the pillar - welded cage bearing has the advantages of a relatively high bearing rated load, high load - bearing capacity, high reliability, simple processing and assembly, etc.

[0022] The above is only the preferred specific implementation mode of the utility model, but the protection scope of the utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the utility model, according to the technical solution of the utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the utility model.

Claims

1. A large-sized self-aligning roller bearing with a strut welded cage, comprising an outer bearing ring (1), an inner bearing ring (4) and a cage assembly; characterized in that: The outer ring (1) is sleeved outside the inner ring (4), and the cage assembly is arranged between the outer ring (1) and the inner ring (4); the cage assembly includes a large washer (5), a small washer (6) and a strut (3), as well as rolling elements (2) evenly distributed in the cage; a through hole is provided in the center of the rolling element (2), and the strut (3) is arranged through the through hole; one end of the strut (3) is threadedly connected to the large washer (5), and the other end passes through the small washer (6) and is riveted to it; the large washer (5) is integrally in a circular ring shape and is a two-half split structure, and is composed of two half-large washers (7) during installation; evenly distributed threaded holes (8) are provided on the circular ring end surface of the large washer (5), and a step (9) is provided at the opening of the two half-large washers (7).

2. The large-size spherical roller bearing with a pillar-welded retainer according to claim 1, characterized in that: The depth of the step (9) is half of the thickness of the large washer (5), and a threaded hole (8) corresponding to the position on the large washer (5) is also provided at the center of the step (9).

3. The large-sized self-aligning roller bearing with a strut welded cage according to claim 1, characterized in that: The position of the step starting line (10) at the edge of the step (9) is located in the middle of the two threaded holes (8), and the step structures at both ends of the opening are arranged in opposite directions.

4. The large-sized self-aligning roller bearing with a strut welded cage according to claim 1, characterized in that: The small washer (6) is an integral circular ring structure, and evenly distributed strut holes (11) are provided on its circumferential end surface.

5. The large-sized self-aligning roller bearing with a strut welded cage according to claim 1, characterized in that: The strut (3) is in a cylindrical structure, one end of which is a threaded structure, the threaded length of which is consistent with the thickness of the large washer (5), and the other end is provided with a polygonal shape at the head.

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