Four-row short cylindrical roller bearing
By eliminating the center retaining edge and adopting a floating retaining ring design, the stress concentration problem of four-row cylindrical roller bearings during high-speed operation is solved, improving the bearing's load-bearing capacity and durability, extending its service life, and simplifying the processing and installation process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-04-07
AI Technical Summary
When existing four-row cylindrical roller bearings operate at high speeds, continuous alternating stress is generated between the center flange and the rollers, leading to stress concentration and flange failure and fracture, thus reducing the bearing's service life.
The middle retaining edge is eliminated, and a design with three retaining rings that can float axially within a small range is adopted. The overrun groove design on the inner and outer rings is reduced, and retaining rings and outer retaining rings are added to limit the axial position of the rollers. Oil passage holes are set to improve the lubrication effect.
It reduces the risk of stress concentration and flange failure, improves the bearing's load-bearing capacity and durability, extends its service life, and facilitates processing and installation.
Smart Images
Figure CN224093693U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bearing technical field, concretely is a kind of four-row short cylindrical roller bearing. BACKGROUND
[0002] Bearing is under the action of impact load when high-speed operation in work, therefore is provided with middle retaining edge, and continuous variable stress between roller and middle retaining edge is generated, stress concentration is easy to generate, reduces bearing service life. UTILITY MODEL CONTENT
[0003] In view of the defects of prior art, the utility model provides a kind of four-row short cylindrical roller bearing, compared with traditional four-row cylindrical roller bearing, cancels middle retaining edge, reduces the continuous variable stress effect between roller and retaining edge, to reduce the risk of stress concentration and retaining edge failure fracture.
[0004] In order to achieve the above purpose, the technical scheme provided by the utility model is a kind of four-row short cylindrical roller bearing, it includes inner ring, outer ring, two retainers, multiple first cylindrical rollers, multiple second cylindrical rollers, multiple third cylindrical rollers and multiple fourth cylindrical rollers, two retainers are arranged in parallel between the inner ring and the outer ring, the retainer includes race, multiple first beam columns arranged in the one side end surface of the race and multiple second beam columns arranged in the other side end surface of the race, first pocket is formed between adjacent first beam columns, second pocket is formed between adjacent second beam columns;
[0005] Multiple first cylindrical rollers are respectively loaded into the first pocket of one retainer;Multiple second cylindrical rollers are respectively loaded into the second pocket of one retainer;Multiple third cylindrical rollers are respectively loaded into the first pocket of another retainer;Multiple fourth cylindrical rollers are respectively loaded into the second pocket of another retainer;First retainer ring is arranged between the first cylindrical roller and the second cylindrical roller, second retainer ring is arranged between the second cylindrical roller and the third cylindrical roller, and third retainer ring is arranged between the third cylindrical roller and the fourth cylindrical roller.
[0006] Further, the first retainer ring and the third retainer ring are arranged on the same side of the retainer, and the second retainer ring is arranged on the different side of the first retainer ring.
[0007] Further, the first retainer ring and the third retainer ring are arranged on the same side of the retainer, and the second retainer ring is arranged on the different side of the first retainer ring.
[0008] Further, the first beam column is provided with a first protrusion, and the second beam column is provided with a second protrusion.
[0009] Furthermore, the first protrusion is disposed on the side of the first beam column away from the bearing central axis, and the second protrusion is disposed on the side of the second beam column away from the bearing central axis.
[0010] Furthermore, the first protrusion is disposed in the middle of the first beam-column, and the second protrusion is disposed in the middle of the second beam-column.
[0011] Furthermore, a first outer retaining ring is provided on one side end face of the outer ring to restrict the axial position of the first cylindrical roller; a second outer retaining ring is provided on the other side end face of the outer ring to restrict the axial position of the fourth cylindrical roller.
[0012] Furthermore, the outer ring has an oil passage hole.
[0013] Furthermore, the oil passage is formed between the third cylindrical roller and the fourth cylindrical roller.
[0014] The beneficial effects of this invention are as follows: By setting three retaining rings that can float axially within a small range—namely, the first, second, and third retaining rings—the middle retaining edge is eliminated, reducing the continuous alternating stress between the roller and the retaining edge, thereby lowering the risk of stress concentration and retaining edge failure. The inner and outer rings have reduced runout grooves, minimizing stress concentration during machining. Both the inner and outer ring raceways can be machined in a single operation, which is beneficial for heat treatment and grinding. The movable retaining ring design facilitates machining and installation, improving product efficiency. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of a four-row short cylindrical roller bearing in one embodiment of the present invention;
[0016] Figure 2 This is a schematic diagram of the cage structure in one embodiment of the present invention;
[0017] In the picture:
[0018] 100. Inner circle
[0019] 200, Outer ring; 210, First outer retaining ring; 220, Second outer retaining ring; 230, Oil passage hole.
[0020] 300, Cage; 310, Seat ring; 320, First beam post; 321, First protrusion; 330, Second beam post; 331, Second protrusion; 340, First pocket; 350, Second pocket.
[0021] 400. First cylindrical roller,
[0022] 500, Second cylindrical roller,
[0023] 600, Third cylindrical roller,
[0024] 700, Fourth cylindrical roller,
[0025] 810, first retaining ring; 820, second retaining ring; 830, third retaining ring. Detailed Implementation
[0026] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0027] See Figure 1 This illustration shows a four-row short cylindrical roller bearing according to an embodiment of the present invention, comprising an inner ring 100, an outer ring 200, two cages 300, a plurality of first cylindrical rollers 400, a plurality of second cylindrical rollers 500, a plurality of third cylindrical rollers 600, and a plurality of fourth cylindrical rollers 700. The two cages 300 are arranged side by side between the inner ring 100 and the outer ring 200. Each cage 300 includes a seat ring 310, a plurality of first beams 320 disposed on one end face of the seat ring 310, and a plurality of second beams 330 disposed on the other end face of the seat ring 310. A first pocket 340 is formed between adjacent first beams 320, and a second pocket 340 is formed between adjacent second beams 330. Two pockets 350; multiple first cylindrical rollers 400 are respectively installed in the first pockets 340 of a cage 300; multiple second cylindrical rollers 500 are respectively installed in the second pockets 350 of a cage 300; multiple third cylindrical rollers 600 are respectively installed in the first pockets of another cage 300; multiple fourth cylindrical rollers 700 are respectively installed in the second pockets 350 of another cage 300; a first retaining ring 810 is provided between the first cylindrical rollers 400 and the second cylindrical rollers 500, a second retaining ring 820 is provided between the second cylindrical rollers 500 and the third cylindrical rollers 600, and a third retaining ring 830 is provided between the third cylindrical rollers 600 and the fourth cylindrical rollers 700.
[0028] The aforementioned four-row short cylindrical roller bearings, by incorporating three retaining rings that can float axially within a small range—namely, the first retaining ring 810, the second retaining ring 820, and the third retaining ring 830—eliminate the intermediate retaining edge, reducing the continuous alternating stress between the rollers and the retaining edge, thereby lowering the risk of stress concentration and retaining edge failure. The inner ring 100 and outer ring 200 have reduced runout grooves, minimizing stress concentration during machining. Both the inner and outer ring raceways can be machined in a single operation, facilitating heat treatment and grinding. The movable retaining ring design facilitates machining and installation, improving product efficiency.
[0029] In one embodiment, the first retaining ring 810 and the third retaining ring 830 are disposed on the same side of the retainer 300, and the second retaining ring 820 is disposed on a different side from the first retaining ring 810.
[0030] In one embodiment, the first retaining ring 810 and the third retaining ring 830 are both located near the inner ring 100, and the second retaining ring 820 is located near the outer ring 200.
[0031] See Figure 2 In one embodiment, the first beam column 320 is provided with a first protrusion 321, and the second beam column 330 is provided with a second protrusion 331.
[0032] In one embodiment, the first protrusion 321 is disposed on the side of the first beam 320 away from the bearing central axis, and the second protrusion 331 is disposed on the side of the second beam 330 away from the bearing central axis.
[0033] In one embodiment, a first protrusion 321 is disposed at the middle of the first beam 320, and a second protrusion 331 is disposed at the middle of the second beam 330.
[0034] The cage 300 of the above-mentioned four-row short cylindrical roller bearing adopts a comb-shaped brass integral cage. The outer diameter of the two claw ends of the cage is raised, namely the first protrusion 321 and the second protrusion 331, which ensures the diameter of the cage 300 is contained, reduces the weight of the cage 300, enables the rolling elements to operate at high speed better, and reduces costs.
[0035] In one embodiment, a first outer retaining ring 210 is provided on one side end face of the outer ring 200 to restrict the axial position of the first cylindrical roller 400; a second outer retaining ring 220 is provided on the other side end face of the outer ring 200 to restrict the axial position of the fourth cylindrical roller 700.
[0036] The aforementioned four-row short cylindrical roller bearings, while eliminating the central retaining ring, add a first outer retaining ring 210, a second outer retaining ring 220, and three retaining rings positioned in the middle. This concentrates stress primarily on these components, improving the bearing's load-bearing capacity and durability. Simultaneously, the raceway length is increased, and the inner ring 100 and outer ring 200 are separable, allowing axial relative movement and further extending the bearing's service life.
[0037] like Figure 1 As shown, in one embodiment, the outer ring 200 has an oil passage hole 230. Specifically, in one embodiment, the oil passage hole 230 is located between the third cylindrical roller 600 and the fourth cylindrical roller 700.
[0038] The aforementioned four rows of short cylindrical roller bearings have oil passage holes 230 on the outer ring 200, through which lubricating oil or grease is injected into the bearing, improving the lubrication effect during bearing operation and further extending the bearing service life.
[0039] In the description of this utility model, it should be understood that 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., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal 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 can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.
Claims
1. A four-row short cylindrical roller bearing, characterized in that: include Inner circle; Outer ring; Two retainers are arranged side by side between the inner ring and the outer ring. Each retainer includes a seat ring, a plurality of first beams provided on one end face of the seat ring, and a plurality of second beams provided on the other end face of the seat ring. A first pocket is formed between adjacent first beams, and a second pocket is formed between adjacent second beams. Multiple first cylindrical rollers are respectively inserted into the first pocket of a cage; Multiple second cylindrical rollers are respectively inserted into the second pocket of a cage; Multiple third cylindrical rollers are respectively inserted into the first pocket of another cage; Multiple fourth cylindrical rollers are respectively inserted into the second pocket of another cage; A first retaining ring is provided between the first cylindrical roller and the second cylindrical roller, a second retaining ring is provided between the second cylindrical roller and the third cylindrical roller, and a third retaining ring is provided between the third cylindrical roller and the fourth cylindrical roller.
2. A four-row short cylindrical roller bearing according to claim 1, characterized in that: The first retaining ring and the third retaining ring are disposed on the same side of the cage, and the second retaining ring is disposed on a different side from the first retaining ring.
3. A four-row short cylindrical roller bearing according to claim 2, characterized in that: The first retaining ring and the third retaining ring are both located close to the inner ring, and the second retaining ring is located close to the outer ring.
4. A four-row short cylindrical roller bearing according to any one of claims 1-3, characterized in that: The first beam column is provided with a first protrusion, and the second beam column is provided with a second protrusion.
5. A four-row short cylindrical roller bearing according to claim 4, characterized in that: The first protrusion is located on the side of the first beam column away from the bearing center axis, and the second protrusion is located on the side of the second beam column away from the bearing center axis.
6. A four-row short cylindrical roller bearing according to claim 5, characterized in that: The first protrusion is located in the middle of the first beam column, and the second protrusion is located in the middle of the second beam column.
7. A four-row short cylindrical roller bearing according to any one of claims 1-3, characterized in that: A first outer retaining ring is provided on one end face of the outer ring to restrict the axial position of the first cylindrical roller; a second outer retaining ring is provided on the other end face of the outer ring to restrict the axial position of the fourth cylindrical roller.
8. A four-row short cylindrical roller bearing according to any one of claims 1-3, characterized in that: The outer ring has an oil passage hole.
9. A four-row short cylindrical roller bearing according to claim 8, characterized in that: The oil passage is formed between the third cylindrical roller and the fourth cylindrical roller.