Long cambered surface self-aligning roller bearing
By adopting the docking form of two half cages, the existing long curved centering roller bearings cannot adapt to in specific application scenarios, and the cost reduction, noise reduction and load-bearing capacity are achieved.
Patent Information
- Application Number
- CN202421757720.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-24
AI Technical Summary
The existing long curved centering roller bearings cannot adapt to applications where the speed requirements are slightly lower but need to reduce cage costs, reduce operating noise and maintain considerable load-bearing capacity.
The two half-clippers docking form saves the mold cost of stamping cages, and the step-like stops are provided on the end surface of the half-clipper and fixed with multiple connectors, which can facilitate assembly and avoid radial displacement and noise reduction.
This significantly reduces product costs, achieves more stable connections, reduces noise, and maintains considerable load-bearing capacity.
Smart Images
Figure CN222836078U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearings, in particular to a long arc surface spherical roller bearing. Background Art
[0002] Long arc spherical roller bearing is a single row bearing with long and slightly arcuate symmetrical rollers and annular raceway profile. It is used for floating ends in shaft systems and can only bear radial loads. Due to its own aligning performance, it allows a certain amount of misalignment in the shaft system and can compensate for the thermal expansion of the shaft system.
[0003] Currently, the bearing structures of this type on the market are mainly full-fill and stamped cage structures, which have strong technical advantages. The full-fill structure is suitable for applications with high load-bearing capacity requirements and low speed requirements, while the stamped cage structure is slightly more widely used and meets the scenarios with higher speed requirements.
[0004] Among them, some markets have slightly lower speed requirements for this type of bearings, but require lower cage costs and reduced operating noise, while having considerable load-bearing capacity. For such application scenarios, existing long arc surface spherical roller bearings cannot adapt. Utility Model Content
[0005] In view of the defects of the prior art, the utility model provides a long arc surface spherical roller bearing, which adopts the form of butt-jointing two half cages, saving the high mold cost of the stamping cage and greatly reducing the cost of the product. In addition, the end face of the half cage is provided with a stepped stop, and the stepped stop of the two half cages is butt-jointed and fixed by multiple connecting parts, which is convenient for assembly, avoids radial displacement, has stable connection and low noise.
[0006] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is a long arc surface spherical roller bearing, which includes an inner ring, an outer ring, a retaining frame and a roller, the inner ring has an arc surface inner raceway; the outer ring has an arc surface outer raceway; the retaining frame is arranged between the inner ring and the outer ring, the retaining frame includes two half retaining frames, the end faces of the half retaining frames are provided with stepped stops, the stepped stops of the two half retaining frames are butt-jointed and fixed by multiple connecting parts, and multiple pockets are formed between the two half retaining frames; the rollers are installed in the pockets and limited between the arc surface inner raceway and the arc surface outer raceway.
[0007] Furthermore, the stepped stop includes a first surface and a second surface both parallel to the end surface of the inner ring, and a third surface connected between the first surface and the second surface, and the third surface is parallel to the axial direction of the bearing.
[0008] Furthermore, the connecting piece includes a rivet, and a plurality of rivet holes are provided on the half cage along the axial direction and through the two end faces, the rivet holes of the two half cages correspond to each other one by one, and the rivet passes through the rivet holes of the two half cages in sequence to fix the two half cages into one.
[0009] Furthermore, the rivet is interference fit with the rivet hole.
[0010] Further, a dimension of the first surface in the radial direction of the bearing is smaller than a dimension of the second surface in the radial direction of the bearing.
[0011] Furthermore, the connecting piece includes a rivet, and a plurality of rivet holes are provided on the half cage along the axial direction and through the two end faces, the rivet holes of the two half cages correspond to each other one by one, and the rivet passes through the rivet holes of the two half cages in sequence to fix the two half cages into one.
[0012] Furthermore, the rivet hole is opened on the second surface.
[0013] Furthermore, the half cage is provided with a plurality of notches for accommodating rollers, and when the two half cages are butt-jointed, pockets are formed in the two notches.
[0014] Furthermore, the opening position of the notch is set to be a rounded corner.
[0015] Furthermore, the side wall of the notch and the bottom wall of the notch are arranged to be transitioned by a first arc.
[0016] Furthermore, the notch and the inner diameter surface of the half cage are arranged to be a second arc transition, and the notch and the outer diameter surface of the half cage are arranged to be a third arc transition.
[0017] The beneficial effects of the utility model are as follows: the two half cages are butted together, which saves the high mold cost of the stamped cage and greatly reduces the cost of the product. In addition, the end faces of the half cages are provided with stepped stoppers, and the stepped stoppers of the two half cages are butted together and fixed by multiple connecting parts, which is convenient for assembly, avoids radial displacement, has a stable connection, and has low noise. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic structural diagram of a long arc surface spherical roller bearing in one embodiment of the utility model;
[0019] Figure 2 It is a structural schematic diagram of a notch of a half cage in one embodiment of the utility model;
[0020] Figure 3 A top view of a notch of a half cage in an embodiment of the utility model;
[0021] Figure 4A three-dimensional diagram of a middle half cage in one embodiment of the present utility model;
[0022] Figure 5 for Figure 4 A three-dimensional view of the middle half cage from another angle;
[0023] Figure 6 A three-dimensional diagram of the other half of the retainer in one embodiment of the utility model;
[0024] In the figure:
[0025] 100, inner ring, 110, curved inner raceway,
[0026] 200, outer ring, 210, curved outer raceway,
[0027] 300, half cage, 310, stepped stop, 311, first surface, 312, second surface, 3121, rivet hole, 313, third surface, 320, cage cover,
[0028] 400, roller,
[0029] 500, connector,
[0030] a, pocket, b, notch, r, fillet, R1, first arc, R2, second arc, R3, third arc. DETAILED DESCRIPTION
[0031] 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.
[0032] See also Figure 1 , shows a schematic structural diagram of a long arc surface spherical roller bearing in an embodiment of the utility model, which includes an inner ring 100, an outer ring 200, a retaining frame and a roller 400, the inner ring 100 has an arc surface inner raceway 110; the outer ring 200 has an arc surface outer raceway 210; the retaining frame is arranged between the inner ring 100 and the outer ring 200, and the retaining frame includes two half retaining frames 300, and the end faces of the half retaining frames 300 are provided with stepped stops 310, the stepped stops 310 of the two half retaining frames 300 are butt-jointed and fixed by multiple connecting pieces 500, and multiple pockets a are formed between the two half retaining frames 300; the roller 400 is installed in the pocket a and is limited between the arc surface inner raceway 110 and the arc surface outer raceway 210.
[0033] The above-mentioned long arc surface spherical roller bearing adopts the form of butt-jointing two half cages 300, which saves the high mold cost of the stamped cage and greatly reduces the cost of the product. In addition, the end face of the half cage 300 is provided with a stepped stop 310, and the stepped stop 310 of the two half cages 300 are butt-jointed and fixed by multiple connectors 500, which is convenient for assembly. The gap of the pocket a is smaller than that of the stamped cage, the cage has better lubrication performance and less noise, and at the same time has considerable load-bearing capacity.
[0034] In one embodiment, the long arc surface spherical roller bearing is made of high-strength light copper alloy, which has a lower density than the low-carbon steel used for ordinary stamping cages, and the weight of the cage product is reduced as much as possible, reducing the rotation burden of the rolling element. The copper material itself has good lubrication performance, and the friction coefficient is much smaller than that of steel-steel friction.
[0035] See also Figure 4-Figure 6 In one embodiment, the stepped stop 310 includes a first surface 311 and a second surface 312 both parallel to the end surface of the inner ring, and a third surface 313 connected between the first surface 311 and the second surface 312, and the third surface 313 is parallel to the axial direction of the bearing.
[0036] In one embodiment, the connecting member 500 includes a rivet, and a plurality of rivet holes 3121 are provided on the half retainer 300 along the axial direction and through the two end surfaces. The rivet holes 3121 of the two half retainers 300 correspond to each other one by one, and the rivets pass through the rivet holes 3121 of the two half retainers in sequence to fix the two half retainers 300 as a whole.
[0037] In one embodiment, the rivet is interference fit with the rivet hole 3121 .
[0038] The above-mentioned long arc surface spherical roller bearing is provided with rivets, and an interference fit is adopted between the rivets and the rivet holes, so that after riveting, the rivet rod fills the rivet holes, and no gap is allowed, thereby limiting the circumferential displacement. In the specific setting, a copper two-piece cage structure can be adopted.
[0039] In one embodiment, a dimension of the first surface 311 in the radial direction of the bearing is smaller than a dimension of the second surface 312 in the radial direction of the bearing.
[0040] In one embodiment, the connecting member 500 includes a rivet, and a plurality of rivet holes are provided on the half retainer 300 along the axial direction and through the two end surfaces. The rivet holes of the two half retainers 300 correspond to each other one by one, and the rivets pass through the rivet holes of the two half retainers 300 in sequence to fix the two half retainers 300 as a whole.
[0041] In one embodiment, the rivet hole is opened on the second surface 312 .
[0042] See also Figure 2In one embodiment, the half cage 300 is provided with a plurality of notches b for accommodating rollers. When two half cages 300 are butt-jointed, two notches b form pockets.
[0043] In one embodiment, the opening position of the notch b is set to a rounded corner r.
[0044] In one embodiment, the side wall of the notch b and the bottom wall of the notch are configured to transition with a first arc R1.
[0045] See also Figure 3 In one embodiment, the notch b and the inner diameter surface of the half cage 300 are set to transition with the second arc R2, and the notch b and the outer diameter surface of the half cage 300 are set to transition with the third arc R3. In this embodiment, a special structure is used for transition at the joint of the two half cages 300 to avoid radial misalignment at the joint of the two half cages 300 and to avoid ridges at the joint to damage the roller 400.
[0046] In one embodiment, a retainer cover 320 is disposed on the end surface of the half retainer 300 away from the stepped stop 310 .
[0047] 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.
[0048] 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.
[0049] 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.
[0050] 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 long arc surface spherical roller bearing, characterized in that: include The inner ring has a curved inner raceway; The outer ring has a curved outer raceway; A cage is provided between the inner ring and the outer ring, the cage comprises two half cages, the end faces of the half cages are provided with stepped stops, the stepped stops of the two half cages are butted and fixed by a plurality of connectors, and a plurality of pockets are formed between the two half cages; The roller is installed in the pocket and limited between the inner cambered raceway and the outer cambered raceway.
2. The long arc surface spherical roller bearing according to claim 1, characterized in that: The stepped stop includes a first surface and a second surface both parallel to the end surface of the inner ring, and a third surface connected between the first surface and the second surface, wherein the third surface is parallel to the axial direction of the bearing.
3. A long arc surface spherical roller bearing according to claim 1 or 2, characterized in that: The connecting piece includes a rivet. A plurality of rivet holes are provided on the half cage along the axial direction and penetrate through the two end faces. The rivet holes of the two half cages correspond to each other. The rivets pass through the rivet holes of the two half cages in sequence to fix the two half cages into one.
4. The long arc surface spherical roller bearing according to claim 3, characterized in that: The rivet is interference fit with the rivet hole.
5. The long arc surface spherical roller bearing according to claim 2, characterized in that: A dimension of the first surface in the radial direction of the bearing is smaller than a dimension of the second surface in the radial direction of the bearing.
6. The long arc surface spherical roller bearing according to claim 5, characterized in that: The connecting piece includes a rivet. A plurality of rivet holes are provided on the half cage along the axial direction and penetrate through the two end faces. The rivet holes of the two half cages correspond to each other. The rivets pass through the rivet holes of the two half cages in sequence to fix the two half cages into one.
7. The long arc surface spherical roller bearing according to claim 6, characterized in that: The rivet hole is opened on the second surface.
8. A long arc surface spherical roller bearing according to any one of claims 1 to 7, characterized in that: The half cage is provided with a plurality of notches for accommodating rollers. When two half cages are butt-jointed, two notches form pockets.
9. The long arc surface spherical roller bearing according to claim 8, characterized in that: The open position of the notch is set to be rounded.
10. The long arc surface spherical roller bearing according to claim 8, characterized in that: The side wall of the notch and the bottom wall of the notch are arranged to be transitioned by a first arc.