Retainer for X-shaped conical bearing

Abstract

The utility model relates to a retainer suitable for a large-size X-shaped conical bearing, which comprises a plurality of units distributed along the circumferential direction, and the plurality of units form an annular body of the whole retainer; each unit comprises four rolling bodies and retainer independent bodies, the retainer independent bodies and the four rolling bodies are arranged at intervals, and a pocket is formed between every two adjacent retainer independent bodies; the angles between the pockets of each unit are arranged at equal intervals; rolling bodies with the number corresponding to that of the pockets are contained in the pockets of the annular body of the whole retainer, and the pockets are arranged in a roller path of a bearing ring; according to the arrangement of the retainer structure, the operating position of the roller in the roller path is considered, and the working condition requirement of the X-shaped conical bearing is met through roller guiding and roller path auxiliary guiding; the contact area is in point contact through the arrangement of the arc convex points, in contact with the raceway, of the retainer, so that the abrasion area is greatly reduced, and the vibration noise is reduced; the retainer is arranged in a unit type segmented mode, and the clearance amount of the whole retainer is guaranteed.

Description

Technical Field

[0001] The utility model relates to a bearing retainer structure, in particular to a retainer for an X-shaped tapered bearing suitable for large sizes, and belongs to the technical field of bearing retainers. Background Art

[0002] As the types of heavy machinery and equipment in China increase, the size of the parts and components supporting the equipment is also gradually increasing, and bearings are one of them. Among them, the size of large X-type tapered roller bearings ranges from 2 meters to 3.5 meters. The retainer used in the X-type tapered roller bearing is a key component of the design. So far, traditional integrated stamping, pillar welding, and machined solid retainers are mostly used, but these structures are not suitable for super-large X-type tapered bearings. The guidance problem of the entire bearing during operation is a key factor for this shape of bearing retainer. Utility Model Content

[0003] In view of the above technical problems, the purpose of the utility model is to provide a retainer for an X-type tapered bearing, which adopts a double-claw containment structure, which can realize the free rotation of the rolling body in the retainer pocket and facilitate lubrication and maintenance, thereby meeting the operating conditions of super-large X-type tapered bearings.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a retainer for an X-type tapered bearing, comprising: a plurality of units distributed along the circumferential direction, the plurality of units forming the entire retainer annular body; each unit comprises four rolling elements and a retainer independent body arranged at intervals therefrom, and a pocket is provided between each two adjacent retainer independent bodies; the angles between the pockets of each unit are equally divided; the pockets of the entire retainer annular body contain a corresponding number of rolling elements and are arranged in the raceway of the bearing ring;

[0005] In the above structure, the entire retainer adopts a unit-type segmented design, so that the total cumulative gap between each retainer unit does not exceed 12±2mm;

[0006] Furthermore, the bearing ring includes an inverted tapered double-raceway outer ring and a V-shaped double-raceway inner ring matching the inverted tapered double-raceway outer ring;

[0007] Furthermore, each of the independent retainer bodies forms two protrusions in the direction of the double-raceway outer ring raceway and the double-raceway inner ring raceway, and the two protrusions face in opposite directions;

[0008] Furthermore, the convex point where the protrusion toward the double-raceway outer ring raceway contacts the raceway is the upper raceway convex point, and the convex point where the protrusion toward the double-raceway inner ring raceway contacts the raceway is the lower raceway convex point;

[0009] Furthermore, the upper raceway convex points and the lower raceway convex points are both configured as arc convex points, so that the retainer forms contact areas with the outer ring and the inner ring respectively;

[0010] Furthermore, the contact area is set as point contact; when the bearing is subjected to axial load and radial load during rotation, the retainer is prevented from intermittently contacting the raceway. The point contact area designed in this way can greatly reduce the wear area and reduce vibration noise.

[0011] Furthermore, the independent retainer adopts a double-claw inclusion design, and the rolling element is located in the pocket hole and is included in a semicircular arc form; according to the size of the roller, the RW value can be controlled within (0.592-0.595) x the roller diameter, and the inclusion area tolerance of ±0.2mm is considered in the RW data to ensure that the roller has free movement space in the retainer pocket hole, which is convenient for the rolling element to rotate and lubricate and maintain;

[0012] Furthermore, the locking amount between the two independent retainer bodies located in the large end diameter direction of the pocket is set to δ1±0.2mm; the locking amount between the two independent retainer bodies located in the small end diameter direction of the pocket is set to 1±0.05mm; through this design, the rolling body can be guided by the running position in the raceway.

[0013] In this solution, the retainer material is semi-crystalline, high-performance thermoplastic engineering plastics; it has strong mechanical properties, chemical corrosion resistance, wear resistance, fatigue resistance and dimensional stability, high temperature resistance of 260°C, and is commonly used in engineering machinery, aerospace products, etc.; bending strength ≥340MP, notch impact strength ≥8.4KJ / m2, tensile elongation at break ≥1.3%, and tensile strength ≥225MPa.

[0014] The beneficial effects of the X-type tapered bearing retainer of the utility model are:

[0015] The structure of the retainer is set by considering the running position of the roller in the raceway, and meets the working condition requirements of this X-type tapered bearing through roller guidance and raceway auxiliary guidance; the arc convex points of the retainer and the raceway are set to form point contact in the contact area, thereby greatly reducing the wear area and vibration noise; the retainer is arranged in a unit-type segmented form to ensure the clearance of the entire retainer; the retainer material is semi-crystalline, high-performance thermoplastic engineering plastics, which has strong mechanical properties, chemical corrosion resistance, wear resistance, fatigue resistance and dimensional stability, and high temperature resistance of 260°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is an assembly diagram of a retainer for an X-type tapered bearing.

[0017] Figure 2 for Figure 1Cross-section of the center retainer pocket.

[0018] Figure 3 This is a unit structure diagram of the retainer of the utility model.

[0019] In the figure, 1, rolling element, 2, independent retainer, 3, double-raceway outer ring, 4, double-raceway inner ring, 5, upper raceway convex point, 6, lower raceway convex point. DETAILED DESCRIPTION

[0020] 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.

[0021] like Figure 1-3 The X-type tapered bearing retainer shown in the figure comprises: a plurality of units distributed along the circumferential direction, the plurality of units forming the entire retainer annular body; each unit comprises four rolling elements 1 and retainer independent bodies 2 arranged at intervals therefrom, a pocket hole being formed between each two adjacent retainer independent bodies 2; the angles between the pocket holes of each unit are equally spaced; the pocket holes of the entire retainer annular body contain a corresponding number of rolling elements 1 and are arranged in the raceway of the bearing ring;

[0022] In the above structure, the entire retainer adopts a unit-type segmented design, so that the total cumulative gap between each retainer unit does not exceed 12±2mm;

[0023] The bearing ring includes an inverted tapered double-raceway outer ring 3 and a V-shaped double-raceway inner ring 4 matching the inverted tapered double-raceway outer ring 3; each of the retainer independent bodies 2 forms two protrusions in the direction of the double-raceway outer ring 3 and the double-raceway inner ring 4, and the two protrusions face in opposite directions;

[0024] The convex point where the protrusion toward the raceway of the double raceway outer ring 3 contacts the raceway is the upper raceway convex point 5, and the convex point where the protrusion toward the raceway of the double raceway inner ring 4 contacts the raceway is the lower raceway convex point 6;

[0025] The upper raceway convex points 5 and the lower raceway convex points 6 are both configured as arc convex points, so that the retainer forms contact areas with the outer ring 3 and the inner ring 4 respectively; the contact areas are configured as point contacts;

[0026] The independent retainer adopts a double-claw inclusion design, and the rolling element is located in the pocket hole and is included in a semicircular arc form; according to the size of the roller, the RW value can be controlled within (0.592-0.595) x roller diameter, and the inclusion area tolerance of ±0.2mm is considered in the RW data to ensure that the roller has free movement space in the retainer pocket hole, which is convenient for the rolling element to rotate and lubricate and maintain;

[0027] The locking amount between the two independent retainer bodies 2 located in the large end diameter direction of the pocket is set to δ1±0.2mm; the locking amount between the two independent retainer bodies 2 located in the small end diameter direction of the pocket is set to 1±0.05mm; through this design, the rolling body 1 can be guided by the running position in the raceway.

[0028] In this solution, the retainer material is semi-crystalline, high-performance thermoplastic engineering plastics; bending strength ≥340MP, notched impact strength ≥8.4KJ / m2, tensile elongation at break ≥1.3%, and tensile strength ≥225MPa.

[0029] The starting point of the design concept of this scheme is:

[0030] For the guidance problem, the overall 3D model is first drawn. Considering that the bearing has a low speed when bearing axial load, it belongs to the low-speed heavy-load situation. When the bearing is in a static state, the retainer does not contact the raceway. It is found that roller guidance and raceway-assisted guidance are the most in line with the working conditions. Then the structure of this technical solution is designed.

[0031] There are certain inspection requirements for the retainer of this solution; Appearance: The surface is flat and smooth, and there must be no burrs on any edge that contacts the rolling element assembly, and no exposed fibers, oil, scale, or dust are allowed; Size: Meet the requirements of the drawing; Coloring inspection: Dyeing inspection to ensure that the contact marks between the rolling element and the retainer pocket are evenly centered, the rolling element and the retainer pocket do not interfere with each other, and rotate smoothly in the pocket.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean 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, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed 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", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. A retainer for an X-type tapered bearing, characterized in that: include: A plurality of units distributed along the circumferential direction, the plurality of units forming the entire retainer annular body; each unit comprises four rolling bodies and retainer independent bodies spaced therefrom, a pocket being provided between each two adjacent retainer independent bodies; the angles between the pockets of each unit are equally spaced; the pockets of the entire retainer annular body contain a corresponding number of rolling bodies and are provided in the raceway of the bearing ring.

2. The retainer for an X-type tapered bearing according to claim 1, characterized in that: The entire retainer adopts a unit-type segmented design.

3. The retainer for an X-type tapered bearing according to claim 1, characterized in that: The bearing ring comprises an inverted tapered double-raceway outer ring and a V-shaped double-raceway inner ring matching the inverted tapered double-raceway outer ring.

4. The retainer for an X-type tapered bearing according to claim 3, characterized in that: Each of the independent retainer bodies forms two protrusions in the direction of the double-raceway outer ring raceway and the double-raceway inner ring raceway, and the two protrusions face in opposite directions.

5. The retainer for an X-type tapered bearing according to claim 4, characterized in that: The convex points where the protrusions toward the double-raceway outer ring raceway contact the raceway are upper raceway convex points, and the convex points where the protrusions toward the double-raceway inner ring raceway contact the raceway are lower raceway convex points.

6. The retainer for an X-type tapered bearing according to claim 5, characterized in that: The upper raceway convex points and the lower raceway convex points are both configured as arc convex points, so that the retainer forms contact areas with the outer ring and the inner ring respectively.

7. The retainer for an X-type tapered bearing according to claim 6, characterized in that: The contact area is set to point contact.

8. The retainer for an X-type tapered bearing according to claim 1, characterized in that: The independent retainer adopts a double-claw containment design, and the rolling body is contained in the pocket in a semicircular arc form.

9. The retainer for an X-type tapered bearing according to claim 8, characterized in that: The locking amount between the two independent retainer bodies located in the direction of the large end diameter of the pocket hole is set to δ1±0.2mm; the locking amount between the two independent retainer bodies located in the direction of the small end diameter of the pocket hole is set to 1±0.05mm.

10. A retainer for an X-type tapered bearing according to any one of claims 1 to 9, characterized in that: The retainer material is semi-crystalline, high-performance thermoplastic engineering plastics; flexural strength ≥340MP, notched impact strength ≥8.4KJ / m2, tensile elongation at break ≥1.3%, and tensile strength ≥225MPa.

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