Retainer structure for improving rotation stability of bearing

Abstract

The utility model discloses a retainer structure for improving the rotation stability of a bearing, which comprises two annular flanges and a plurality of window beams, the outer diameter surfaces of the two flanges are regular polygons, the two ends of each window beam are respectively connected with the regular polygon surfaces of the two flanges, and window holes between the adjacent window beams are respectively used for placing rollers of the bearing. Each window beam is of a rectangular plate-shaped structure and extends in the radial direction at the center of the surface of each edge of the regular polygon of the retaining edge to form an inclined face, and the inclined faces of the adjacent window beams support the rollers in the window holes. An oil passing hole is formed in the inner diameter of the window beam. According to the window beam forming mode of the retainer, the contact mode of the retainer and the roller is changed into line-surface contact, meanwhile, the contact length of the retainer and the roller is the length of the whole roller, and the stability of the contact mode of the retainer and the roller is improved. According to the utility model, the cage window beam is the inclined plane extending upwards between the two flanges, and the oil passing hole is designed on the inner diameter of the cage inclined plane window beam, so that the oil passing quantity is improved.

Description

Technical Field

[0001] The utility model relates to the field of bearings, in particular to a retaining frame structure for improving the rotation stability of bearings. Background Art

[0002] With the continuous development and use of bearings, the application fields of bearings are becoming more and more extensive, involving some high-precision operating systems, which have high requirements for the rotation accuracy and rotation stability of bearings. The cage plays the role of maintaining the position of the needle rollers and ensuring the uniform distribution of the needle rollers. The cage often contacts and collides with the needle rollers. Therefore, in addition to improving the overall machining accuracy of the bearing and parts, the structural design of the cage becomes particularly important. Commonly used radial bearing machined cage structures are as follows: Figure 1 As shown, the structure is a single-locking retainer, with ribs at both ends of the retainer and a window beam connected between the two ribs; the window hole between the window beams is composed of a lower locking port and non-locking ports at both ends, as shown in FIG. Figure 2 The lower lock is in direct contact with the roller, forming a line contact. In addition, due to the processing error of the window beam, point contact may be formed, resulting in instability in the contact mode between the cage and the roller, leading to uneven roller wear in the later stage. Utility Model Content

[0003] The utility model aims to provide a cage structure for improving the rotation stability of the bearing, optimize the contact mode between the machined cage and the roller, improve the contact stability between the cage and the roller, and ensure the rotation accuracy and rotation stability.

[0004] The technical solution of the utility model is:

[0005] A cage structure for improving the rotation stability of a bearing comprises two annular ribs and a plurality of window beams. The outer diameter surfaces of the two ribs are regular polygons. The two ends of each window beam are respectively connected to the regular polygon surfaces of the two ribs. The window holes between adjacent window beams are respectively used to place rollers of the bearing.

[0006] Preferably, the window beam is a rectangular plate-like structure, which radially extends at the surface center of each side of the regular polygon of the retaining edge to form an inclined surface, and the inclined surfaces of adjacent window beams support the rollers in the window hole.

[0007] Preferably, an oil hole is provided on the inner diameter of the window beam.

[0008] Preferably, there are two oil holes on the inner diameter of each window beam, which are respectively located at the two ends of the connection with the retaining edge.

[0009] Preferably, the side guard and the window beam are formed by an integrated machine.

[0010] The advantages of the utility model are:

[0011] 1. The window beam forming method of the cage of the utility model changes the contact mode between the cage and the roller to line-surface contact, and the contact length between the cage and the roller is the entire roller length, thereby improving the stability of the contact mode between the cage and the roller.

[0012] 2. The cage window beam of the utility model is an inclined surface extending upward between the two ribs, and an oil hole is designed on the inner diameter of the cage inclined window beam to increase the amount of oil passing. At the same time, compared with the conventional cage, after assembly, the exposed area of ​​the roller end face is larger, and the gap between the roller and the cage is more conducive to the flow of lubricating oil, thereby improving the lubrication efficiency.

[0013] 3. The cage of the utility model is processed by an integrated machine tool, and a special tool is customized during the processing, which can well ensure its processing accuracy and dimensional accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 Machining cage structure diagram for existing radial bearing;

[0016] Figure 2 for Figure 1 A schematic diagram of the structure of the window hole between the window beams;

[0017] Figure 3 This is a structural diagram of the cage of the utility model;

[0018] Figure 4 It is a schematic diagram of the end face of the retainer of the utility model;

[0019] Figure 5 It is a cross-sectional view of the retaining frame of the present utility model. DETAILED DESCRIPTION

[0020] like Figure 3-5 As shown, the cage structure for improving the rotational stability of the bearing of the utility model comprises two annular ribs 1 and a plurality of window beams 2, the outer diameter surfaces of the two ribs 1 are regular polygons, the two ends of each window beam are respectively connected to the regular polygonal surfaces of the two ribs 1, and the window holes between adjacent window beams 2 are respectively used to place the rollers 3 of the bearing.

[0021] The window beam 2 is a rectangular plate structure, which extends radially at the surface center of each side of the regular polygon of the retaining edge 1 to form an inclined surface. The angle between the window beams 2 is related to the number of window holes. This embodiment takes ten rollers as an example. The two retaining edges 1 of the retaining frame are not conventional circles, but are designed as regular decagons. A window beam 2 extends from each side plane. The angle between the window beams 2 is 36°±15'. The inclined surface formed between the two window beams 2 supports the roller 3 of the bearing to ensure that the roller does not fall. The window beam 2 of the utility model is formed in a way that the contact mode between the retaining frame and the roller 3 is changed to line-surface contact. At the same time, the contact length between the retaining frame and the roller is the entire roller length, which improves the stability of the contact mode between the retaining frame and the roller.

[0022] The inner diameter of the window beam 2 is provided with oil holes 21. There are two oil holes 21 on the inner diameter of each window beam, which are respectively located at the two ends of the connection with the retaining edge 1 to increase the amount of oil. At the same time, compared with the conventional cage, after assembly, the exposed area of ​​the roller end face is larger, and the gap between the roller and the cage is more conducive to the flow of lubricating oil, thereby improving the lubrication efficiency.

[0023] The window holes of conventional retainers are formed by die punching or wire cutting. The retainer structure of this embodiment is processed by a turning and milling machine tool, and a special tool is customized during the processing, which can well ensure its processing accuracy and dimensional accuracy.

[0024] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any modifications made according to the spirit of the main technical solution of the utility model should be included in the protection scope of the utility model.

Claims

1. A cage structure for improving the rotational stability of a bearing, characterized in that: It comprises two annular ribs and a plurality of window beams. The outer diameter surfaces of the two ribs are regular polygons. The two ends of each window beam are respectively connected to the regular polygon surfaces of the two ribs. The window holes between adjacent window beams are respectively used to place rollers of bearings.

2. The retaining frame structure according to claim 1, characterized in that: The window beam is a rectangular plate-shaped structure, which radially extends at the surface center of each side of the regular polygon of the retaining edge to form an inclined surface, and the inclined surfaces of adjacent window beams support the rollers in the window hole.

3. The retaining frame structure according to claim 2, characterized in that: An oil hole is arranged on the inner diameter of the window beam.

4. The retaining frame structure according to claim 3, characterized in that: There are two oil holes on the inner diameter of each window beam, which are located at the two ends of the connection with the retaining edge.

5. The retaining frame structure according to claim 4, characterized in that: The retaining edge and the window beam are formed by integrated machine processing.

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