Roller neck matched bearing
By adopting a TDI structure consisting of four rows of cylindrical roller bearings and two rows of tapered roller bearings, the problems of insufficient load-bearing capacity and difficult installation of roller neck bearings have been solved, achieving a roller neck matching bearing design with high rigidity, good sealing, strong lubrication, and low cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-27
- Publication Date
- 2026-04-07
AI Technical Summary
Existing roller neck bearings have insufficient load-bearing capacity under heavy loads and high stresses, and are difficult to install and disassemble. The traditional combination of four-row cylindrical roller bearings and double-row angular contact ball bearings cannot meet the high rigidity requirements in limited space.
The TDI structure, which uses four rows of cylindrical roller bearings and two rows of tapered roller bearings, replaces the traditional combination, increasing the load-bearing capacity. It also improves sealing and lubrication through sealing grooves, O-rings and large chamfer design, and uses inner and outer spacer components to ensure easy installation.
It improves the bearing's load-bearing capacity, enhances sealing and lubrication, reduces processing costs, and facilitates installation and disassembly.
Smart Images
Figure CN224093695U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a bearing structure, concretely relates to a roll neck matched bearing and belongs to the technical field of bearing. BACKGROUND
[0002] The roll neck bearing bears heavy load and suffers high system stress or specific stress. The roll neck radial installation space is limited. Under the same space, the bearing must have sufficient rigidity under large load. The existing roll neck bearing is generally composed of four column cylindrical roller bearings and double row angular contact ball bearings, but the double row angular contact ball bearing has insufficient bearing capacity, and the installation and dismounting are relatively difficult. SUMMARY
[0003] In view of the technical problems existing in the above roll neck bearing, the utility model aims at providing a roll neck matched bearing. The bearing adopts the form of double row tapered roller bearing with TDI structure, has higher bearing capacity, has the advantages of convenient installation, good sealing property, strong lubricity and relatively light weight, guarantees the bearing performance, and reduces the bearing processing cost.
[0004] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme of a roll neck matched bearing, which comprises four column cylindrical roller bearing units, double row tapered roller bearing units matched with the four column cylindrical roller bearing units and transition units between the two sets of bearing units. The four column cylindrical roller bearing units, the double row tapered roller bearing units and the transition units are independent of each other. The end faces of the transition units are respectively located on one end face of the four column cylindrical roller bearing units and the double row tapered roller bearing units.
[0005] Further, the double row tapered roller bearing with TDI structure in the double row tapered roller bearing unit adopts four column cylindrical roller bearings + double row tapered roller bearings instead of the traditional four column cylindrical roller bearings + double row angular contact ball bearings. Compared with the double row angular contact ball bearings, the double row tapered roller bearings have higher bearing capacity under the same inner and outer diameter size.
[0006] Further, the double row tapered roller bearing comprises two single-race outer rings, a double-race inner ring, double row tapered rollers located between the outer ring raceways and the inner ring raceways and a retainer. The small head ends of the two outer rings are oppositely arranged, and an outer ring outer spacer is arranged between the end faces of the small head ends of the two outer rings.
[0007] Further, the two outer rings of the double row tapered roller bearing are separable and are spaced apart by the outer ring outer spacer.
[0008] Further, the outer diameter surfaces of the two outer rings of the double row tapered roller bearing are provided with sealing grooves, and O-shaped sealing rings are installed in the sealing grooves.
[0009] Further, the assembly chamfer of the outer diameter and the end surface junction of the outer ring of the double-row tapered roller bearing adopts a large chamfer design of R8-R10, that is, a circular arc chamfer with a radius of 8-10 mm;
[0010] Further, the inner ring end surface of the double-row tapered roller bearing is uniformly distributed with a plurality of circular arc grooves;
[0011] Further, the outer ring outer spacer adopts a "convex" structure, the inner diameter is a straight plane, and the outer diameter forms a convex part.
[0012] At the same time, a plurality of semicircular lubricating oil grooves are uniformly distributed on the end surfaces of the outer ring outer spacer.
[0013] Further, the excessive unit in the scheme is an inner and outer ring assembly, that is, a roll neck matching bearing assembly, which comprises an inner spacer and an outer spacer, the inner spacer is located inside the outer spacer and is arranged concentrically with the outer spacer; in use, the inner spacer is arranged concentrically in the outer spacer and makes the inner spacer end surface in the same end direction abut against the inner ring end surface of the four-row cylindrical roller bearing and the outer spacer end surface abut against the outer ring end surface of the four-row cylindrical roller bearing; in addition, the inner spacer end surface in the same end direction abuts against the inner ring end surface of the double-row tapered roller bearing and the outer spacer end surface abuts against the outer ring end surface of the double-row tapered roller bearing; so that the roll neck matching bearing and its assembly are installed on the roll neck shaft.
[0014] Further, the width of the inner spacer is the same as that of the outer spacer, and an annular cavity is formed between the inner spacer and the outer spacer.
[0015] Further, the outer diameter surface of the outer spacer is arranged flush with the outer diameter surface of the outer ring of the four-row cylindrical roller bearing and the double-row tapered roller bearing, and the inner diameter surface of the inner spacer is arranged flush with the inner diameter surface of the inner ring of the double-row tapered roller bearing.
[0016] Further, the outer diameter surface of the inner spacer adopts a large slope structure that inclines downward to the direction of the inner ring of the double-row tapered roller bearing.
[0017] Further, the inclination angle of the large slope is 30 degrees.
[0018] The beneficial effects of the technical scheme of the utility model are as follows:
[0019] The scheme adopts four-row cylindrical roller bearings + double-row tapered roller bearings to replace the traditional four-row cylindrical roller bearings + double-row angular contact ball bearings, the double-row tapered roller bearings in the bearing adopt a TDI structure, have higher bearing capacity, and have the advantages of convenient installation, good sealing performance, strong lubricity, relatively light weight, etc., ensure the bearing performance, and reduce the bearing processing cost. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1The total assembly view of the matched bearing of the roll neck of the utility model.
[0021] Figure 2 For Figure 1 The sectional view of the double row tapered roller bearing and assembly.
[0022] Figure 3 For Figure 2 The enlarged view of I.
[0023] Figure 4 The structure view for showing the chamfer design parameters of the outer ring assembly of the double row tapered roller bearing.
[0024] Figure 5 The structure view for showing the original chamfer design parameters of the outer ring assembly of the double row tapered roller bearing.
[0025] Figure 6 The partial structure view of the outer ring outer spacer of the double row tapered roller bearing.
[0026] Figure 7 For Figure 6 The A-A sectional view.
[0027] Figure 8 The outer spacer structure view of the matched bearing assembly of the roll neck of the utility model.
[0028] Figure 9 The inner spacer structure view of the matched bearing assembly of the roll neck of the utility model.
[0029] Figure 10 The assembly size structure view of the outer spacer and the inner spacer.
[0030] In the figure, 1, outer ring, 2, inner ring, 3, tapered roller, 4, retainer, 5, outer ring outer spacer, 6, O-shaped sealing ring, 2.1, circular arc groove, 5.1, lubricating oil groove, 7, inner spacer, 8, outer spacer, 9, annular cavity, 7.1, large slope. DETAILED DESCRIPTION
[0031] In order to make the above purpose, features and advantages of the utility model more apparent, easy to understand, the specific implementation of the utility model is explained in detail below combined with the drawings. In the following description, a lot of specific details are set forth in order to fully understand the utility model. But the utility model can be implemented in many other ways different from the description, 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 following disclosed specific embodiments.
[0032] As Figures 1-7The roller neck bearing shown includes: a four-row cylindrical roller bearing unit and a matching double-row tapered roller bearing unit and a transition unit between the two bearing units; the four-row cylindrical roller bearing unit, the double-row tapered roller bearing unit and the transition unit are independent of each other; the two end faces of the transition unit respectively abut against one end face of the four-row cylindrical roller bearing unit and the double-row tapered roller bearing unit.
[0033] Furthermore, the double-row tapered roller bearing unit uses a TDI structure double-row tapered roller bearing. This solution uses a four-row cylindrical roller bearing + double-row tapered roller bearing instead of the traditional four-row cylindrical roller bearing + double-row angular contact ball bearing combination. Compared with double-row angular contact ball bearings, for the same inner and outer diameter, the size and number of rolling elements are larger when using the double-row tapered design than when using double-row angular contact bearings, so the corresponding load is greater and the bearing capacity is higher.
[0034] Furthermore, the double-row tapered roller bearing includes two single-raceway outer rings 1, one double-raceway inner ring 2, double-row tapered rollers 3 located between the raceways of the outer ring 1 and the inner ring 2, and a cage 4; the small ends of the two outer rings are arranged opposite each other, and an outer ring spacer 5 is provided between the end faces of the small ends of the two outer rings 1.
[0035] Furthermore, the two outer rings 1 of the double-row tapered roller bearing are separable, separated by an outer spacer 5, making installation and disassembly convenient;
[0036] Furthermore, the outer diameter surfaces of the two outer rings 1 of the double-row tapered roller bearing are provided with sealing grooves, and O-ring seals 6 are installed in the sealing grooves to prevent contaminants from entering the bearing and to reduce bearing noise and vibration.
[0037] Furthermore, the assembly chamfer at the junction of the outer diameter of the outer ring 1 of the double-row tapered roller bearing and the end face adopts a large chamfer design of R8-R10, that is, a circular arc chamfer with a radius of 8-10mm; this range of large chamfer radius is an improvement based on the original chamfer setting range, as follows: Figure 5 As shown, the R-shaped chamfer setting range of this scheme is 2~5mm larger than that of the original chamfer. The R-shaped chamfer can reduce contact stress and ensure a good transition for installation, making it convenient for installation.
[0038] Furthermore, the inner ring 2 of the double-row tapered roller bearing has evenly distributed circular arc grooves 2.1 on its end face, with 4 to 8 circular arc grooves 2.1, which improve lubrication conditions, reduce contact stress, ensure sufficient lubrication of the bearing, reduce friction and noise, thereby extending the service life of the bearing.
[0039] Furthermore, the outer ring spacer 5 adopts a "convex" structure, with an inner diameter that is a straight plane and an outer diameter that forms a protrusion;
[0040] Meanwhile, several semi-circular lubricating oil grooves 5.1 are evenly distributed on both end faces of the outer ring and outer spacer 5; this structural design reduces the weight of the outer ring and outer spacer 5, which can reduce the bearing processing cost and ensure normal bearing lubrication.
[0041] Furthermore, the transition unit in this solution is an inner and outer ring type assembly, namely, the assembly of the roller neck matching bearing. The assembly of the roller neck matching bearing includes: an inner spacer 7 and an outer spacer 8. In use, the inner spacer 7 is concentrically arranged inside the outer spacer 8, and the end face of the inner spacer 7 in the same direction abuts against the end face of the inner ring of the four-row cylindrical roller bearing, and the end face of the outer spacer 8 abuts against the end face of the outer ring of the four-row cylindrical roller bearing. In addition, the end face of the inner spacer 7 in the same direction abuts against the end face of the inner ring 2 of the double-row tapered roller bearing, and the end face of the outer spacer 8 abuts against the end face of the outer ring 1 of the double-row tapered roller bearing. Thus, the roller neck matching bearing and its assembly are both installed on the roller neck shaft. The function of these two assemblies matching the bearing on the roller neck is to ensure the axial distance from the bearing and to prevent oil leakage, thus providing auxiliary lubrication.
[0042] Furthermore, the inner spacer 7 and the outer spacer 8 have the same width, and an annular cavity 9 is formed between the inner spacer 7 and the outer spacer 8;
[0043] Furthermore, the outer diameter surface of the outer spacer 8 is flush with the outer diameter surface of the outer ring of the four-row cylindrical roller bearing and the double-row tapered roller bearing, and the inner diameter surface of the inner spacer 7 is flush with the inner diameter surface of the inner ring 2 of the double-row tapered roller bearing.
[0044] Furthermore, the outer diameter surface of the inner spacer 7 adopts a large slope 7.1 structure that slopes downward toward the inner ring 2 of the double-row tapered roller bearing;
[0045] Furthermore, the inclination angle of the large ramp 7.1 is 30 degrees. Compared with the previous 2×45-degree right angle, the 30-degree large ramp inclination angle setting can cause dryness with the bearing cage during assembly. Changing the chamfer to a 30-degree large ramp effectively avoids dryness with the cage, and also reduces the weight of the inner spacer, thus reducing costs.
[0046] The inner diameter surface of the inner spacer 7, the inner diameter surface of the outer spacer 8, and the outer diameter surface of the outer spacer 8 are all straight planes.
[0047] 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.
[0048] 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.
[0049] 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.
[0050] In this utility model, 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 with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" 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.
[0051] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. 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 intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
Claims
1. A roller neck matching bearing, characterized in that, include: Four-row cylindrical roller bearing unit and its matching double-row tapered roller bearing unit and transition unit between the two bearing units; the four-row cylindrical roller bearing unit, double-row tapered roller bearing unit and transition unit are independent of each other; the two end faces of the transition unit respectively abut against one end face of the four-row cylindrical roller bearing unit and the double-row tapered roller bearing unit. The transition unit includes an inner spacer and an outer spacer, wherein the inner spacer is located inside the outer spacer and is concentrically arranged with the outer spacer; The inner and outer spacers have the same width and form an annular cavity between them. The outer diameter surface of the inner spacer ring adopts a large slope structure that is inclined downwards towards the inner ring of the double-row tapered roller bearing; the inclination angle of the large slope is 30 degrees.
2. The roller neck bearing according to claim 1, characterized in that: The double-row tapered roller bearing includes two single-raceway outer rings, one double-raceway inner ring, double-row tapered rollers located between the outer ring raceways and the inner ring raceways, and a cage; the small ends of the two outer rings are arranged opposite each other, and an outer ring spacer is provided between the end faces of the small ends of the two outer rings.
3. The roller neck bearing according to claim 2, characterized in that: The two outer rings of the double-row tapered roller bearing are separable and are separated by an outer spacer.
4. The roller neck matching bearing according to claim 2, characterized in that: The two outer rings of the double-row tapered roller bearing have sealing grooves on their outer diameter surfaces, and O-rings are installed in the sealing grooves.
5. A roller neck bearing according to claim 2, characterized in that: The assembly chamfer at the junction of the outer diameter of the outer ring and the end face of the double-row tapered roller bearing adopts a large chamfer design of R8-R10, that is, a circular arc chamfer with a radius of 8-10mm.
6. A roller neck bearing according to claim 2, characterized in that: The inner ring end face of the double-row tapered roller bearing has several evenly distributed circular arc grooves.
7. A roller neck bearing according to claim 2, characterized in that: The outer ring and outer spacer adopt a "convex" structure, with an inner diameter that is a straight plane and an outer diameter that forms a protrusion; several semi-circular lubricating oil grooves are evenly distributed on both end faces of the outer ring and outer spacer.