A retainer

Abstract

The utility model relates to the technical field of variable pitch bearing, concretely is a kind of retainer, including retainer crossbeam, retainer end part;The retainer crossbeam is provided with several;The retainer end part is two, and several retainer crossbeams are provided between two the retainer end part, and every adjacent two retainer crossbeams and two retainer end parts form the pocket hole of the rolling element, the both sides of the retainer end part are provided with chamfer structure, for guiding retainer and raceway cooperation.It solves the problems of low assembly accuracy, poor structural stability and other problems of traditional split type retainer in the above background technology, realizes the effect of improving variable pitch bearing roller installation precision, enhancing retainer structural strength and stability, prolonging variable pitch bearing service life.

Description

Technical Field

[0001] This utility model relates to the field of pitch bearing technology, specifically to a cage. Background Technology

[0002] Pitch bearings are a key component of wind turbine generators. Their cages separate the rollers, ensuring orderly roller movement and significantly impacting bearing performance and lifespan. Traditional pitch bearing cages are mostly split-type structures. During assembly, the installation and positioning of these split components are difficult and prone to deviations, affecting roller installation accuracy. This leads to uneven stress on the rollers during bearing operation, resulting in additional wear and noise, and reducing overall bearing stability and lifespan. Furthermore, under the complex loads of long-term pitch operation, the split-type cage is prone to loosening and deformation at the joints, further weakening bearing performance and failing to meet the high precision and reliability requirements of wind turbine equipment for pitch bearings. Utility Model Content

[0003] In view of the deficiencies of the prior art, the present invention provides a cage that solves the problems of low assembly accuracy and poor structural stability of traditional split cages in the background art, thereby improving the installation accuracy of pitch bearing rollers, enhancing the structural strength and stability of the cage, and extending the service life of pitch bearings.

[0004] To achieve the above objectives, the present invention provides a cage comprising cage beams and cage ends; a plurality of cage beams are provided; there are two cage ends, and a plurality of cage beams are provided between the two cage ends; each pair of adjacent cage beams and the two cage ends form a pocket for holding rolling elements; chamfered structures are provided on both sides of the cage ends to guide the cage to cooperate with the raceway; and retaining edges are provided on both sides of the cage ends near the pockets.

[0005] Furthermore, the two cage ends correspond to the inner walls of the ends that form pockets that are parallel to each other.

[0006] Furthermore, the two cage crossbeams correspond to the inner side walls forming the pockets.

[0007] Furthermore, the inner side wall includes a straight section and an arc section, the distance between two straight sections of a single pocket is greater than the minimum distance between two arc sections, and the positions of the arc sections of the inner side wall of two adjacent pockets are opposite.

[0008] Furthermore, the cage crossbeam and the cage end form an integrally molded frame.

[0009] Furthermore, the cross-section of the end face of the cage is trapezoidal.

[0010] Furthermore, several of the cage crossbeams are evenly distributed at equal intervals between the ends of the two cages.

[0011] The beneficial effects of this utility model are as follows: The purpose of this utility model is to provide an integrated three-row column pitch bearing cage to solve the problems of low assembly accuracy and poor structural stability of traditional split cages in the above-mentioned background art, thereby improving the installation accuracy of pitch bearing rollers, enhancing the structural strength and stability of the cage, and extending the service life of the pitch bearing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Enlarged view of a portion at point A; Figure 3 for Figure 2 Sectional view of section AA; Figure 4 for Figure 2 BB section sectional view; In the diagram: 100, cage crossbeam. 200. Cage end; 210. Chamfered structure; 220. Edge retainer. 300, Pocket; 310, End inner wall; 320, Side inner wall; 321, Straight section; 322, Arc section. Detailed Implementation

[0013] 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.

[0014] like Figure 1-4 As shown, a cage according to an embodiment of the present invention includes a cage beam 100 and a cage end 200; there are a plurality of cage beams 100; there are two cage ends 200, and a plurality of cage beams 100 are arranged between the two cage ends 200. Each pair of adjacent cage beams 100 and two cage ends 200 form a pocket 300 for holding rolling elements. The two sides of the cage end 200 are provided with chamfered structures 210 for guiding the cage to cooperate with the raceway; the two sides of the cage end 200 near the pocket 300 are provided with retaining edges 220.

[0015] It should be noted that: the flange 220 is used to limit the displacement of the cage itself and the radial movement of the rolling elements (cylindrical rollers); the rolling elements are cylindrical rollers.

[0016] In one embodiment, the two cage ends 200 correspond to the inner walls 310 of the pockets 300 that are parallel to each other.

[0017] In one embodiment, the two cage crossbeams 100 correspond to the inner sidewalls 320 forming the pockets 300.

[0018] In one embodiment, the inner side wall 320 includes a straight section 321 and an arc section 322. The distance between the two straight sections 321 of a single pocket 300 is greater than the minimum distance between the two arc sections 322. The positions of the arc sections 322 of the inner side wall 320 of two adjacent pockets 300 are opposite.

[0019] In one embodiment, the cage beam 100 and the cage end 200 form an integrally molded frame.

[0020] In one embodiment, the cross-section of the cage end face is trapezoidal.

[0021] In one embodiment, a plurality of the cage beams 100 are evenly distributed at equal intervals between the two cage ends 200.

[0022] In one of the above-mentioned cage technical solutions: 1) Innovative Integrated Structure: Abandoning the traditional split design, it adopts an integrated, one-piece molded frame. This eliminates positional deviations that are prone to occur in split assembly, precisely ensuring the parallelism and spacing consistency of the three rows of rollers, allowing for even force distribution on the rollers, improving the stability of the pitch bearing from the structural source, and reducing abnormal wear and noise.

[0023] 2) Precise optimization of the installation area: An arc-shaped guide surface is set on the inner wall of the roller installation area ( Figure 4 During assembly, the curved surface guides the rollers to smoothly enter their positions, avoiding installation jamming; it also provides initial positioning for the rollers, preventing misalignment during installation and laying a solid foundation for the accuracy of the initial assembly for the stable operation of the bearings in the future.

[0024] 3) Functional design of flange 220: The outer side of flange 220 is machined with a chamfered structure 210 ( Figure 3 During assembly, the chamfer acts as a guide, allowing the cage and raceway to fit together quickly and accurately, reducing the difficulty of manual assembly; at the same time, it avoids sharp edges, preventing scratches on the raceway surface during assembly and operation, protecting key bearing components, and extending the overall service life.

[0025] 4) Multi-area coordinated layout: The three rows of installation areas are arranged equidistantly and parallelly along the inner circumference of the frame, in conjunction with the 220mm integrally formed corner guards. Figure 3 This forms a collaborative system of "orderly bearing of rollers + precise 220mm limit of the retainer," which makes the cage have better structural strength and stability under the complex load environment of pitch bearings, and is suitable for the long-term reliable operation requirements of wind power generation equipment.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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 cage, characterized in that: include The cage crossbeams are provided in several configurations. The cage ends are two in number, and a plurality of cage crossbeams are provided between the two cage ends. Each pair of adjacent cage crossbeams and the two cage ends form a pocket for holding the rolling elements. The two sides of the cage ends are provided with chamfered structures to guide the cage to cooperate with the raceway. The two sides of the cage ends near the pockets are provided with retaining edges.

2. A retainer according to claim 1, characterized in that: The two cage ends correspond to the inner walls of the ends that form pockets that are parallel to each other.

3. A retainer according to claim 1, characterized in that: The two cage crossbeams correspond to the inner side walls forming the pockets.

4. A retainer according to claim 3, characterized in that: The inner side wall includes a straight section and an arc section. The distance between two straight sections of a single pocket is greater than the minimum distance between two arc sections. The positions of the arc sections of the inner side wall of two adjacent pockets are opposite.

5. A retainer according to claim 1, characterized in that: The cage crossbeam and the cage end form an integrally molded frame.

6. A retainer according to claim 1, characterized in that: The cross-section of the cage end face is trapezoidal.

7. A retainer according to claim 1, characterized in that: Several cage crossbeams are evenly distributed at equal intervals between the ends of the two cages.

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