Three-row cylindrical roller bearing retainer segment, retainer and bearing

Abstract

The utility model discloses a three-row cylindrical roller bearing retainer segment, a retainer and a bearing, the three-row cylindrical roller bearing retainer segment comprises an outer arc plate, an inner arc plate and a plurality of partition plates arranged between the outer arc plate and the inner arc plate, and the outer arc plate and the inner arc plate are concentrically arranged; each outer arc plate, the corresponding inner arc plate and every two adjacent partition plates define a pocket used for containing a rolling body, each partition plate is provided with an inner wall face facing the corresponding pocket and side wall faces located at the two ends of the corresponding inner wall face, and each side wall face is provided with a groove; the groove penetrates through the two ends of the side wall face in the arc extending direction of the outer arc plate. According to the three-row cylindrical roller bearing retainer segment, the lubricating effect in the bearing operation process is improved, abrasion is reduced, the strength of the partition plates can be greatly improved, then the load bearing capacity of the retainer segment and even the bearing is improved, and the service life of the bearing is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearings, in particular to a three-row cylindrical roller bearing cage segment, a cage and a bearing. BACKGROUND

[0002] The bearing cage can also be called a bearing retainer, which is a bearing part that partially wraps all or part of the rolling elements and moves with them, and is used to isolate the rolling elements, and usually guides and retains the rolling elements in the bearing. For large-diameter rolling bearings, due to the difficulty of manufacturing and processing a whole cage, a segmented cage is usually configured. Among them, the three-row cylindrical roller bearing is a common large-diameter rolling bearing, which includes two concentric inner and outer rings, three rows of rolling elements arranged between the raceways and guide surfaces of the inner and outer rings, and a segmented cage for guiding the rolling of the rolling elements. The rolling bearing is usually loaded in the axial and radial directions, and often bears relatively strong load. The segmented cage includes a plurality of continuous cage segments that abut in the circumferential direction relative to each other, and each cage segment is configured to receive at least one rolling element. In use, the segmented cage is in large-area contact with the guide surfaces and raceways of the inner and outer rings, which increases the friction torque of the rolling bearing, and after a long period of use, it can cause wear of the cage, and in severe cases, it can even cause wear of the inner and outer rings, affecting the service life of the bearing. Traditionally, the segmented cage is made of expensive materials such as bronze to reduce friction with the inner and outer rings, but this increases the manufacturing cost of the bearing. In addition, the inner ring or the outer ring of the bearing is usually provided with an oil hole for injecting lubricating oil, and the lubricating oil enters the segmented cage through the oil hole. The large-area contact of the cage with the guide surfaces and raceways of the inner and outer rings also causes the lubricating oil to be scraped, causing the lubricating oil to be directed and concentrated in a part of the cage, which cannot ensure that the lubricating oil can be fully pushed to the surface of all rolling elements, resulting in insufficient lubrication. The dry state between the rolling elements and the cage caused by the lack of lubrication further exacerbates the wear between the rolling elements and the cage and the wear between the cage and the inner and outer rings, resulting in failure of the entire bearing. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a three-row cylindrical roller bearing cage segment, a cage and a bearing, which effectively solves the technical problems of wear and oil scraping caused by the large-area contact of the segmented cage with the guide surfaces and raceways of the inner and outer rings during the operation of the existing three-row cylindrical roller bearing.

[0004] The technical scheme adopted by the present application is as follows:

[0005] The three-row cylindrical roller bearing cage segment comprises an outer circular arc plate, an inner circular arc plate, and a plurality of partition plates arranged between the outer circular arc plate and the inner circular arc plate, the outer circular arc plate and the inner circular arc plate are concentrically arranged, the outer circular arc plate, the inner circular arc plate, and two adjacent partition plates form a pocket for placing a rolling element, the partition plate has an inner wall surface facing the pocket and a side wall surface at both ends of the inner wall surface, and the side wall surface is provided with a groove; along the extension direction of the circular arc of the outer circular arc plate, the groove penetrates both ends of the side wall surface.

[0006] The three-row cylindrical roller bearing cage segment provided in the application further comprises the following additional technical features:

[0007] The partition plate has a first end connected to the outer circular arc plate and a second end connected to the inner circular arc plate, and the side wall surface is recessed from the first end and the second end towards the middle to form the groove.

[0008] The side wall surfaces at both ends of the partition plate are a first side wall surface and a second side wall surface respectively; along the direction from the first side wall surface to the second side wall surface, the width of the partition plate gradually increases.

[0009] The inner wall surface has a limiting surface connected to the second side wall surface, and the limiting surface is arranged as an arc surface for stopping and guiding the rolling element to roll.

[0010] One side of the second side wall surface close to the pocket is provided with an oil passing gap.

[0011] The second side wall surface between two adjacent pockets is provided with an oil storage groove, and the oil storage groove extends along the length direction of the partition plate.

[0012] The inner wall of the oil storage groove is provided with a first inclined surface and a second inclined surface, and the first inclined surface and the second inclined surface cooperate to form a V-shaped structure.

[0013] The two sides of the outer circular arc plate are connected to the side wall surface through a first chamfer; and / or, the two sides of the inner circular arc plate are connected to the side wall surface through a second chamfer.

[0014] The application further provides a three-row cylindrical roller bearing cage, which is composed of a plurality of three-row cylindrical roller bearing cage segments as described above.

[0015] The application further provides a three-row cylindrical roller bearing, which comprises a three-row cylindrical roller bearing cage as described above.

[0016] As a result of adopting the above technical solutions, the application achieves at least the following technical effects:

[0017] 1. The outer arc plate, the inner arc plate and the partition plate constitute the main structure of the whole cage segment and enclose the pockets, playing the supporting, limiting and guiding roles for the rolling elements; the outer arc plate and the inner arc plate are concentrically arranged, so that the cage segment is adapted to the three-row cylindrical roller bearing cage of the ring structure, and a plurality of cage segments can be abutted and matched at the head and tail to form a whole ring of the three-row cylindrical roller bearing cage; the side wall surface is provided with a groove extending along the direction of the arc of the outer arc plate, and the groove penetrates through both ends of the side wall surface, on the one hand, the existence of the groove reduces the contact area between the cage segment and the inner ring and the outer ring of the bearing, thereby reducing the loss caused by friction and wear, improving the reliability of the bearing, prolonging the service life of the bearing, and reducing the material requirements of the cage segment, allowing the cage segment to be made of lower-cost materials, thereby reducing the manufacturing cost of the bearing; on the other hand, by setting the groove, the space in the groove expands the flow area of the lubricating oil between the cage segment and the inner ring and the outer ring of the bearing, effectively improving the oil scraping problem, so that the lubricating oil flows in the whole annular space of the three-row cylindrical roller bearing cage through the groove, and the lubricating oil can smoothly enter each pocket to lubricate each rolling element and the cage segment, further enhancing the lubrication effect, so that the lubrication between the rolling elements and the cage segment is more sufficient, and the lubrication between the cage segment and the inner ring and the outer ring of the bearing is also more sufficient, reducing the wear during the operation of the bearing and improving the service life of the bearing; and during the operation of the bearing, the groove can increase the heat dissipation area and improve the heat dissipation effect, which can fully remove the heat between the cage segment and the rolling elements, further improving the service life of the bearing. Preferably, the groove can be pressed by stamping or the like, the partition plate has an overall arched structure with large ends and a small middle, and the pressing manner makes the middle region of the partition plate the part with the largest material accumulation density, which helps to greatly improve the strength of the partition plate and further improve the load bearing capacity of the cage segment and even the bearing.

[0018] 2. The side wall surface is recessed from the first end and the second end towards the middle to form the groove, so that the entire side wall surface of the partition plate constitutes the concave bottom surface of the groove, in other words, the entire side wall surface of the partition plate is recessed, effectively increasing the space in the groove, thereby helping to sufficiently reduce the friction between the cage segment and the inner ring and the outer ring of the bearing, and also increasing the flow area of the lubricating oil, which helps to improve the lubrication effect; and in the embodiment in which the groove is formed by pressing, the entire side wall surface of the partition plate is recessed by pressing to form an overall arched structure, improving the overall strength of the partition plate.

[0019] 3. The inner wall surface has a limiting surface connected to the second side wall surface, the limiting surface is arranged as an arc-shaped surface for stopping and guiding the rolling body to roll, so as to ensure that the rolling body stably rolls in the pocket during operation of the bearing, and also helps to reduce the friction between the rolling body and the inner wall surface, reduce the wear of the segmented retainer, and prolong the service life.

[0020] 4. The oil storage groove can store lubricating oil, increase the oil storage capacity of the bearing, supplement the lubricating oil to each part of the segmented retainer in time, make the rolling body be fully lubricated, reduce the overall weight of the segmented retainer, make the bearing more suitable for high-speed rotation application scenarios, and further increase the heat dissipation area of the oil storage groove and improve the heat dissipation effect of the bearing. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0022] Figure 1 The front view of the segmented retainer provided by the embodiment of the application;

[0023] Figure 2 The rear view of the segmented retainer provided by the embodiment of the application;

[0024] Figure 3 The left view of the segmented retainer provided by the embodiment of the application;

[0025] Figure 4 The sectional view of the segmented retainer provided by the embodiment of the application;

[0026] Figure 5 The axonometric view of the segmented retainer provided by the embodiment of the application; Figure 1

[0027] Figure 6 The axonometric view of the segmented retainer provided by the embodiment of the application; Figure 2

[0028] Figure 7 The structural schematic view of the three-row cylindrical roller bearing retainer formed by the plurality of three-row cylindrical roller bearing segmented retainers provided by the embodiment of the application.

[0029] List of components and reference numerals:

[0030] 1. The outer circular arc plate, 11. The first chamfer;

[0031] 2. The inner circular arc plate, 21. The second chamfer;

[0032] ​​3 partition plate, 31 inner wall surface, 311 limiting surface, 32 side wall surface, 321 first side wall surface, 322 second side wall surface, 33 groove, 34 oil passing gap, 35 oil storage groove, 351 first inclined surface, 352 second inclined surface, 36 first end, 37 second end

[0033] 4 pocket. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0035] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details and other implementations can be employed. Therefore, the scope of the present application is defined by the appended claims, rather than the specific embodiments disclosed herein.

[0036] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection, or communication; can be direct connection, or indirect connection through intermediate medium; can be internal connection of two elements, or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] In the embodiments of the present application, a three-row cylindrical roller bearing cage segment, a cage and a bearing are provided. For the convenience of description and understanding, the following content provided by the present application is described on the basis of the structure of the product. Of course, those skilled in the art can understand that the above structure is only a specific example and illustrative description, and cannot constitute a specific limitation on the technical solutions provided by the present application.

[0039] As Figures 1 to 6As shown, the three-row cylindrical roller bearing cage segment provided by the present application comprises an outer circular arc plate 1, an inner circular arc plate 2, and a plurality of partition plates 3 arranged between the outer circular arc plate 1 and the inner circular arc plate 2. The outer circular arc plate 1 and the inner circular arc plate 2 are concentrically arranged. The outer circular arc plate 1, the inner circular arc plate 2, and two adjacent partition plates 3 form a pocket 4 for placing a rolling element. The partition plate 3 has an inner wall surface 31 facing the pocket 4 and a side wall surface 32 located at both ends of the inner wall surface 31. The side wall surface 32 is provided with a groove 33. The groove 33 penetrates both ends of the side wall surface 32 along the extension direction of the circular arc of the outer circular arc plate 1.

[0040] The outer circular arc plate 1, the inner circular arc plate 2, and the partition plate 3 constitute the main structure of the entire cage segment and form the pocket 4, which plays a supporting, limiting, and guiding role for the rolling element. The concentric arrangement of the outer circular arc plate 1 and the inner circular arc plate 2 makes the cage segment suitable for the three-row cylindrical roller bearing cage with a circular ring structure. A plurality of cage segments can be connected end to end to form a complete ring of the three-row cylindrical roller bearing cage. The side wall surface 32 is provided with the groove 33, which penetrates both ends of the side wall surface 32 along the extension direction of the circular arc of the outer circular arc plate 1. On the one hand, the existence of the groove 33 reduces the contact area between the cage segment and the inner ring and the outer ring of the bearing, thereby reducing the loss caused by friction and wear, improving the reliability of the bearing, prolonging the service life of the bearing, and reducing the material requirements for the cage segment, allowing the use of lower-cost materials to manufacture the cage segment and reducing the manufacturing cost of the bearing. On the other hand, by providing the groove 33, the space in the groove 33 expands the flow area of the lubricating oil between the cage segment and the inner ring and the outer ring of the bearing, effectively improving the oil scraping problem. The lubricating oil flows through the groove 33 in the entire annular space of the three-row cylindrical roller bearing cage, and the lubricating oil can smoothly enter each pocket 4 to lubricate each rolling element and the cage segment, further enhancing the lubrication effect, thereby achieving more sufficient lubrication between the rolling element and the cage segment, and more sufficient lubrication between the cage segment and the inner ring and the outer ring of the bearing, reducing wear during the operation of the bearing, and improving the service life of the bearing. Moreover, during the operation of the bearing, the groove 33 can increase the heat dissipation area and improve the heat dissipation effect, fully removing the heat between the cage segment and the rolling element, and further improving the service life of the bearing.

[0041] It should be noted that the present application does not limit the number of pockets 4 formed by the cage segment, Figure 1 The embodiment of the cage segment provided with three pockets 4 is schematically shown. Of course, the cage segment can also be provided with only one pocket 4, two pockets 4, or other appropriate number of pockets 4.

[0042] As a preferred embodiment, the recess 33 can be formed by pressing or other pressing methods, and the partition plate 3 has an arch structure with large ends and a small middle part. Compared with cutting, pressing can maximize the material accumulation density of the partition plate 3, which helps to greatly improve the strength of the partition plate 3, and further improve the load bearing capacity of the retainer segment and even the bearing.

[0043] As a preferred embodiment of the present application, as shown in Figures 1 to 3 the partition plate 3 has a first end 36 connected to the outer arc plate 1 and a second end 37 connected to the inner arc plate 2, and the side wall surface 32 is recessed from the first end 36 and the second end 37 towards the middle part to form the recess 33. Those skilled in the art can understand that, by this arrangement, the entire side wall surface 32 of the partition plate 3 constitutes the concave bottom surface of the recess 33, in other words, the entire side wall surface 32 of the partition plate 3 is recessed, effectively increasing the space inside the recess 33, thereby helping to sufficiently reduce the friction between the retainer segment and the inner and outer rings of the bearing, and increasing the flow area of the lubricating oil, which helps to improve the lubrication effect; and in the embodiment in which the recess 33 is formed by pressing, the entire side wall surface 32 of the partition plate 3 is recessed by pressing to form an arch structure, which improves the overall strength of the partition plate 3.

[0044] As a preferred embodiment, as shown in Figures 4 to 6 the side wall surface 32 of the partition plate 3 at the two ends is respectively a first side wall surface 321 and a second side wall surface 322; and the width of the partition plate 3 gradually increases in the direction from the first side wall surface 321 to the second side wall surface 322. On the one hand, by gradually widening the partition plate 3 from one end to the other end, the strength of the partition plate 3 is improved, thereby improving the load bearing capacity; and secondly, the wider end of the partition plate 3 near the second side wall surface 322 can be used to limit the rolling element, specifically, the rolling element can enter the pocket 4 from the opening of the pocket 4 near the first side wall surface 321, and then be limited by the end of the partition plate 3 near the second side wall surface 322, thereby being confined in the pocket 4.

[0045] Preferably, as shown in Figure 4 and Figure 5 the inner wall surface 31 has a limiting surface 311 connected to the second side wall surface 322, which is an arc-shaped surface for stopping and guiding the rolling element to roll, to ensure that the rolling element stably rolls in the pocket 4 during the operation of the bearing, and also helps to reduce the friction between the rolling element and the inner wall surface 31, reduce the wear of the retainer segment, and improve the service life.

[0046] Preferably, as shown in Figure 2 andFigure 6 As shown in the drawings, one side of the second side wall surface 322 close to the pocket 4 is provided with an oil passing gap 34. Those skilled in the art can understand that, in the state that the rolling body is installed into the pocket 4, due to the existence of the oil passing gap 34, the second side wall surface 322 and the rolling body form an avoiding space for the lubricating oil to flow, and the lubricating oil can realize circulating flow in the pocket 4 under the driving of the rolling body, which also helps the lubricating oil to realize circulating flow inside and outside the pocket 4 through the oil passing gap 34, and helps to fully lubricate the surface of the rolling body and the outer surface of the retainer segment.

[0047] Preferably, as shown in the drawings, Figure 2 , Figure 4 and Figure 6 , the second side wall surface 322 between the adjacent two pockets 4 is provided with an oil storage groove 35, and the oil storage groove 35 extends along the length direction of the partition plate 3. Those skilled in the art can understand that the oil storage groove 35 can realize oil storage, increase the oil storage capacity of the bearing, and supplement the lubricating oil to each part of the retainer segment in time, so that the rolling body is fully lubricated, the overall weight of the retainer segment is reduced, the bearing is more suitable for high-speed rotating application scenarios, and the oil storage groove 35 further increases the heat dissipation area and improves the heat dissipation effect of the bearing.

[0048] Further preferably, as shown in the drawings, Figure 2 , Figure 4 and Figure 6 , the inner wall of the oil storage groove 35 is provided with a first inclined surface 351 and a second inclined surface 352, and the first inclined surface 351 and the second inclined surface 352 cooperate to form a V-shaped structure. Those skilled in the art can understand that the V-shaped structure makes the lubricating oil in the oil storage groove 35 smoothly spread towards the surrounding of the retainer segment along the shape of the first inclined surface 351 and the second inclined surface 352, improves the uniformity of the distribution of the lubricating oil in the bearing, and further improves the lubricating effect.

[0049] As a preferred embodiment of the present application, as shown in the drawings, Figure 3 , the two sides of the outer circular arc plate 1 are connected with the side wall surface 32 through a first chamfer 11. As another preferred embodiment of the present application, as shown in the drawings, Figure 3As shown, the two sides of the inner arc plate 2 are connected with the side wall surface 32 through the second chamfer 21. Those skilled in the art can understand that, by arranging the first chamfer 11 and the second chamfer 21, the joint positions of the side edges of the outer arc plate 1 and the inner arc plate 2 along the concave side wall surface 32 of the partition plate 3 are smoother, and the abrupt change of the joint positions is avoided to ensure the structural strength. Moreover, the first chamfer 11 and the second chamfer 21 can be formed by pressing to improve the structural strength. In addition, the arrangement of the first chamfer 11 and the second chamfer 21 reduces the falling of burrs, which helps to improve the cleanliness of the bearing.

[0050] The three-row cylindrical roller bearing cage provided by the present application is formed by connecting a plurality of three-row cylindrical roller bearing cage segments as described above. Specifically, as shown in Figure 7 The plurality of cylindrical roller bearing cage segments can be connected end to end to form a complete ring structure of the three-row cylindrical roller bearing cage. It should be noted that, since the three-row cylindrical roller bearing cage provided by the present application includes the three-row cylindrical roller bearing cage segment in any of the above embodiments, the beneficial effects of the three-row cylindrical roller bearing cage segment are also included in the three-row cylindrical roller bearing cage provided by the present application, which will not be described here.

[0051] The present application also provides a three-row cylindrical roller bearing, which includes the three-row cylindrical roller bearing cage as described above.

[0052] The places not described in the present application can be realized by using or referring to the existing technology.

[0053] Each of the embodiments in the present specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment mainly describes the differences from other embodiments.

[0054] The above only describes the embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A three-row cylindrical roller bearing cage segment, characterized in that, The outer arc plate and the inner arc plate are concentrically arranged, and the outer arc plate, the inner arc plate and two adjacent separation plates form a pocket for placing a rolling element, the separation plate has an inner wall surface facing the pocket and a side wall surface at both ends of the inner wall surface, and the side wall surface is provided with a groove; along the extension direction of the arc of the outer arc plate, the groove penetrates both ends of the side wall surface.

2. The three-row cylindrical roller bearing cage segment of claim 1, wherein, The separation plate has a first end connected to the outer arc plate and a second end connected to the inner arc plate, and the side wall surface is recessed from the first end and the second end towards the middle to form the groove.

3. The three-row cylindrical roller bearing cage segment of claim 2, wherein, The side wall surfaces at both ends of the separation plate are a first side wall surface and a second side wall surface, respectively; along the direction from the first side wall surface to the second side wall surface, the width of the separation plate gradually increases.

4. The three-row cylindrical roller bearing cage segment of claim 3, wherein, The inner wall surface has a limiting surface connected to the second side wall surface, and the limiting surface is provided as an arc surface for stopping the rolling element and guiding the rolling of the rolling element.

5. The three-row cylindrical roller bearing cage segment of claim 3, wherein, The side of the second side wall surface close to the pocket is provided with an oil passing gap.

6. The three-row cylindrical roller bearing cage segment of claim 3, wherein, The second side wall surface between two adjacent pockets is provided with an oil storage groove, and the oil storage groove extends along the length direction of the separation plate.

7. The three-row cylindrical roller bearing cage segment of claim 6, wherein, The inner wall of the oil storage groove is provided with a first inclined surface and a second inclined surface, and the first inclined surface and the second inclined surface cooperate to form a V-shaped structure.

8. The three-row cylindrical roller bearing cage segment of claim 1, wherein, Both sides of the outer arc plate are connected to the side wall surface through a first chamfer; And / or, both sides of the inner arc plate are connected to the side wall surface through a second chamfer.

9. A three-row cylindrical roller bearing cage, characterized in that The three-row cylindrical roller bearing cage is connected by a plurality of three-row cylindrical roller bearing cages according to any one of claims 1 to 8.

10. A three-row cylindrical roller bearing, characterized by The three-row cylindrical roller bearing cage comprises the three-row cylindrical roller bearing cage according to claim 9.

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