Radial bearing retainer suitable for high-rotating-speed working condition

Abstract

The utility model discloses a radial bearing retainer suitable for a high rotating speed working condition, which comprises two flanges arranged in parallel and a plurality of window beams connected with the two flanges, the plurality of window beams are uniformly arranged at intervals along the axial direction of the flanges, a window hole for accommodating a roller pin is formed between every two adjacent window beams, and the window holes are communicated with the window holes. A first locking opening area is formed at the end, close to the center of the flange, of the window beam, a second locking opening area is formed at the other end, away from the center of the flange, of the window beam, and a non-locking opening area is formed in the position, between the first locking opening area and the second locking opening area, of the window beam. The first locking opening area comprises at least one groove part and protruding parts, wherein the groove part is recessed from the window hole to the window beam, and the protruding parts are arranged on the two sides of the groove part and protrude towards the window hole. According to the radial bearing retainer provided by the utility model, the friction loss between the roller pin and the retainer under the working condition of high rotating speed can be reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a radial bearing retainer suitable for high-speed working conditions. Background Art

[0002] Conventional radial needle roller bearing cage structure is as follows Figure 1 As shown, it includes two ribs 100 arranged in parallel with each other and a plurality of window beams 200 of the two ribs 100. The plurality of window beams 200 are evenly spaced along the circumferential direction of the ribs 100. A window hole 300 for accommodating a needle roller is formed between two adjacent window beams 200. The structure is an M-type retainer, and the cross-sectional shape of the retainer is in an "M" shape. The first locking opening 201 and the second locking opening 202 on the window beam 200 are in direct contact with the needle roller to limit the radial movement of the needle roller and prevent the needle roller from falling out. The shape of the window hole 300 is as shown in FIG. Figure 2 shown.

[0003] This type of structural cage is suitable for most conventional operating conditions. However, due to the long contact length between the first and second locking positions and the needle rollers, at high speeds, the collision frequency between the upper and lower locking areas of the cage and the needle rollers increases sharply, which will generate greater friction resistance, resulting in increased wear in the contact area between the cage and the needle rollers and a reduction in the overall life of the bearing.

[0004] In order to solve the above problems, the present utility model is provided. Utility Model Content

[0005] The utility model aims to provide a radial bearing retainer suitable for high-speed working conditions, which can reduce the wear between the needle roller and the retainer.

[0006] Based on the above problems, the technical solution provided by the utility model is:

[0007] A radial bearing retainer suitable for high-speed working conditions comprises two ribs arranged in parallel with each other and a plurality of window beams connecting the two ribs, the plurality of window beams being evenly spaced along the axial direction of the ribs, a window hole for accommodating a needle roller being formed between two adjacent window beams, a first locking area being formed at one end of the window beam close to the center of the ribs, a second locking area being formed at the other end of the window beam away from the center of the ribs, a non-locking area being located between the first locking area and the second locking area on the window beam, the first locking area comprising at least one groove portion sunken from the window hole toward the window beam, and protruding portions being arranged on both sides of the groove portion and protruding toward the window hole.

[0008] In some embodiments, the groove portion has a depth consistent with that of the non-locking area.

[0009] In some of the embodiments, a chamfered transition portion is provided between the groove portion and the protrusion portion.

[0010] In some embodiments, the angle of the chamfered transition portion is 35 to 60 degrees.

[0011] In some embodiments, a groove portion recessed toward the window beam is provided between the second locking area and the retaining edge.

[0012] In some embodiments, the groove portion is in an arc shape.

[0013] In some embodiments, the radius of the groove portion is 0.6-1.2 mm.

[0014] In some embodiments, the angle between the groove portion and the second locking area is 145 to 155 degrees.

[0015] Compared with the prior art, the advantages of the utility model are:

[0016] (1) A groove portion is provided in the first locking area, which is recessed from the window hole to the window beam, so that the contact area between the needle roller and the first locking area can be reduced, thereby reducing the wear between the needle roller and the cage under high-speed operation and increasing the service life of the cage;

[0017] (2) A chamfered transition portion is provided between the groove portion and the protrusion portion, which can reduce stress concentration and improve the strength of the cage structure;

[0018] (3) A groove is provided between the second locking area and the rib, which can reduce the contact length between the second locking area and the needle roller, reduce the contact area between the needle roller and the second locking area, and further reduce wear;

[0019] (4) An angle transition is set between the groove portion and the second locking area to ensure a smooth transition, reduce stress concentration of the cage, and improve the strength of the cage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of a retainer in the prior art;

[0022] Figure 2 It is a structural schematic diagram of a window hole in the prior art;

[0023] Figure 3 This is one of the structural schematic diagrams of an embodiment of a radial bearing retainer suitable for high-speed working conditions of the utility model;

[0024] Figure 4 This is the second structural diagram of the embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the window hole in the embodiment of the utility model;

[0026] in:

[0027] 100, retaining edge; 200, window beam; 201, first locking opening; 202, second locking opening; 300, window hole;

[0028] 1. Sidewall;

[0029] 2. Window beam; 2-1. First locking area; 2-1a. Protruding portion; 2-1b. Grooved portion; 2-2. Second locking area; 2-3. Grooved portion; 2-4. Non-locking area;

[0030] 3. Window hole. DETAILED DESCRIPTION

[0031] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the utility model and are not limited to the scope of the utility model. The implementation conditions used in the examples can be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0032] like Figures 3 to 5 As shown, an embodiment of the utility model is provided, which provides a radial bearing retainer suitable for high-speed working conditions, including two ribs 1 arranged in parallel with each other and a plurality of window beams 2 connecting the two ribs 1, a window hole 3 for accommodating a needle roller is formed between two adjacent window beams 2, one end of the window beam 2 close to the center of the rib 1 forms a first locking area 2-1, and the other end of the window beam 2 away from the center of the rib 1 forms a second locking area 2-2, and a non-locking area 2-4 is located between the first locking area 2-1 and the second locking area 2-2 on the window beam 2.

[0033] Specifically, the window beam 2 includes a middle cross beam, oblique beams arranged at both ends of the cross beam in the length direction, and a connecting portion connecting the oblique beam and the retaining edge 1, a first locking area 2-1 is arranged on the cross beam, and a second locking area 2-2 is arranged at the connecting portion. The needle roller is placed between the two window beams 2 and is restricted in the window hole 3 by the first locking area 2-1 and the second locking area 2-2.

[0034] Under high-speed conditions, in order to reduce the wear of the needle roller and the first locking area 2-1, the first locking area 2-1 includes at least one groove portion 2-1b recessed from the window hole 3 to the window beam 2 and protruding portions 2-1a arranged on both sides of the groove portion 2-1b and protruding toward the window hole 3. The protruding portions 2-1a on both sides of the groove portion 2-1b contact the needle roller to play a locking role, and the needle roller does not contact the groove portion 2-1b, thereby reducing the contact area between the needle roller and the first locking area 2-1 and reducing friction loss under high-speed conditions.

[0035] In order to facilitate processing, a groove portion 2-1b is provided in the first locking area 2-1, and the length of the groove portion 2-1b is 1 / 3 of the length of the first locking area 2-1. It should be understood that in the implementation process, the number of groove portions 2-1b can be provided as needed, and the utility model does not limit it. The depth of the groove portion 2-1b is consistent with the depth of the non-locking area 2-4, and the depth is about 0.1mm.

[0036] In order to reduce stress concentration and improve the structural strength of the retaining frame, a chamfered transition portion is provided between the groove portion 2-1b and the protrusion portion 2-1a. The angle of the chamfered transition portion is 35 to 60 degrees. Preferably, the angle of the chamfered transition portion is 45 degrees. It can also be provided as a rounded corner.

[0037] In order to reduce the wear between the needle roller and the second locking area 2-2, a groove portion 2-3 recessed toward the window beam 2 is provided between the second locking area 2-2 and the retaining edge 1. Preferably, the groove portion 2-3 is arc-shaped with a radius of 0.6-1.2 mm.

[0038] In order to achieve a smooth transition between the groove portion 2-3 and the second locking area 2-2 and reduce stress concentration of the retainer, an angle of 145 to 155 degrees is set between the groove portion 2-3 and the second locking area 2-2.

[0039] In summary, the structure of the cage can reduce the contact area between the needle roller and the locking mouth of the cage, reduce the friction loss under high-speed working conditions, and increase the service life of the cage, thereby increasing the service life of the bearing.

[0040] The above examples 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 equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A radial bearing retainer suitable for high-speed working conditions, comprising two ribs arranged in parallel with each other and a plurality of window beams connecting the two ribs, the plurality of window beams being evenly spaced along the axial direction of the ribs, a window hole for accommodating a needle roller being formed between two adjacent window beams, one end of the window beam close to the center of the rib forming a first locking area, the other end of the window beam away from the center of the rib forming a second locking area, the window beam located between the first locking area and the second locking area is a non-locking area, characterized in that: The first locking area includes at least one groove portion recessed from the window hole toward the window beam and protruding portions arranged at both sides of the groove portion and protruding toward the window hole.

2. The radial bearing retainer suitable for high speed working conditions according to claim 1 is characterized in that: The groove portion has the same depth as that of the non-locking area.

3. The radial bearing retainer suitable for high speed working conditions according to claim 1 is characterized in that: A chamfered transition portion is arranged between the groove portion and the protruding portion.

4. The radial bearing retainer suitable for high speed working conditions according to claim 3 is characterized in that: The angle of the chamfered transition portion is 35 to 60 degrees.

5. The radial bearing retainer suitable for high speed working conditions according to claim 1, characterized in that: A groove portion recessed toward the window beam is provided between the second locking area and the retaining edge.

6. The radial bearing retainer suitable for high speed working conditions according to claim 5, characterized in that: The groove portion is in an arc shape.

7. The radial bearing retainer suitable for high speed working conditions according to claim 6, characterized in that: The radius of the groove portion is 0.6 to 1.2 mm.

8. The radial bearing retainer suitable for high speed working conditions according to claim 7, characterized in that: The included angle between the groove portion and the second locking area is 145 to 155 degrees.

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