Plane thrust segmented retainer and bearing

Abstract

The invention discloses a plane thrust segmented retainer and a bearing, and relates to the field of bearings, the plane thrust segmented retainer comprises at least two retainer segments, each retainer segment is provided with a plurality of windows, and the adjacent windows are separated by cross beams; first stop blocks are symmetrically arranged on the mounting surface of the window, second stop blocks are symmetrically arranged on the inner walls of the two sides of the window, the first stop blocks are used for wrapping the upper half section of the roller, and the second stop blocks are used for wrapping the lower half section of the roller. The rollers are wrapped by the first check blocks and the second check blocks which are arranged on the windows, the failure phenomenon caused by collision is avoided, and the service life of the retainer and the service life of the bearing can be prolonged.

Description

Technical Field

[0001] The present invention relates to the field of bearings, and particularly to a segmented thrust cage for a plane and a bearing. Background Art

[0002] A plane thrust bearing is used to bear axial force and mainly includes an inner ring, rolling elements, a cage, etc. Among them, the cage is usually made of metal or plastic, and its function is to evenly distribute the rolling elements between the inner ring and the outer ring to prevent collision and wear between the rolling elements.

[0003] For some occasions with large shaft diameter requirements, such as the pitch bearing in the field of wind power generation, in order to facilitate the installation of the bearing, a segmented cage structure is adopted, and the cage is injection-molded with materials such as POM; the injection-molded cage has a lower friction coefficient, can reduce the generation of frictional heat, and lower the temperature rise of the bearing; and it has good elasticity and can withstand the accelerating impact load acting on the cage by the rolling elements. However, the injection-molded cage usually fails after 2 to 5 years of use. This is because when the bearing rotates, there is a gap between the cage and the rollers in the inner and outer rings of the bearing, and this gap will cause the cage to collide with the inner and outer rings of the bearing. After long-term collision, the chamfer at the window will fall off, crack, or the side beam on the open side of the window will be damaged or fall off. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a segmented thrust cage for a plane and a bearing. By providing a first stop block and a second stop block disposed at the window to wrap the rollers, the failure phenomenon caused by collision can be avoided, and the service life of the cage and the bearing can be extended.

[0005] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a segmented thrust cage for a plane, including at least two cage segments. Each cage segment has a plurality of windows, and adjacent windows are separated by cross beams; a first stop block is symmetrically disposed on the mounting surface of the window, and second stop blocks are symmetrically disposed on the inner walls on both sides of the window. The first stop block is used to wrap the upper half of the roller, and the second stop block is used to wrap the lower half of the roller.

[0007] As a further implementation manner, the cross beam is provided with a mounting groove corresponding to the mounting surface of the window, and the first stop block is disposed in the mounting groove.

[0008] As a further implementation manner, the mounting groove is a trapezoidal groove.

[0009] As a further implementation manner, at least two second stop blocks are disposed on each inner wall of the window.

[0010] As a further implementation manner, when there are two second stoppers provided on the inner wall of each side of the window, the two second stoppers are symmetrically distributed relative to the first stopper on the same side.

[0011] As a further implementation manner, the inner surface of the first stopper is a first arc surface, and the first arc surface extends to a set position on the inner wall of the window.

[0012] As a further implementation manner, one end of the second stopper close to the first stopper is an arc segment, and the inner surface of the arc segment is a second arc surface.

[0013] As a further implementation manner, one end of the cross beam is connected to the outer retaining edge, and the other end is connected to the inner retaining edge;

[0014] The inner retaining edge and the outer retaining edge have the same bending curvature.

[0015] As a further implementation manner, the segmented cage is integrally injection molded.

[0016] In a second aspect, an embodiment of the present invention further provides a flat thrust bearing, including the segmented cage and rollers installed on the segmented cage.

[0017] The beneficial effects of the present invention are as follows:

[0018] (1) In the present invention, the first stoppers and the second stoppers are symmetrically arranged in the cage window. The second stoppers form the support for the rollers and the limit for the lower half segment of the rollers, and the first stoppers form the limit for the upper half segment of the rollers, ensuring the assembly reliability of the rollers and the cage, avoiding the cage failure phenomenon caused by collision, and being able to extend the service life of the cage and the bearing.

[0019] (2) The first stopper of the present invention has a first arc surface, and the second stopper has a second arc surface, which can be adapted to the shape of the rollers; the first stopper bends towards the side where the window is located, which can limit the rollers in the window. At the same time, the second stopper has a connecting portion, which can support the rollers. Therefore, the cooperation of the first stopper and the second stopper can effectively limit the rollers.

[0020] (3) The first stopper of the present invention corresponds to the middle position of the rollers, and the second stoppers can form a triangular distribution with the first stopper, forming a stable support structure on both sides of the rollers, further ensuring the installation stability of the rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specification drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0022] Figure 1Is an isometric view of a cage segment according to one or more embodiments of the present invention;

[0023] Figure 2 Is a top view of a cage segment according to one or more embodiments of the present invention;

[0024] Figure 3 Is a schematic diagram of the arrangement of the first stop block and the second stop block according to one or more embodiments of the present invention;

[0025] Figure 4 Is a schematic structural diagram of the first stop block and the second stop block according to one or more embodiments of the present invention;

[0026] Figure 5 Is the assembly of the roller and the cage segment according to one or more embodiments of the present invention Figure 1 ;

[0027] Figure 6 Is the assembly of the roller and the cage segment according to one or more embodiments of the present invention Figure 2 .

[0028] Wherein, 1. Cage segment, 2. Outer retaining edge, 3. Inner retaining edge, 4. Cross beam, 5. Installation groove, 6. Window, 7. First stop block, 8. Second stop block, 9. First arc surface, 10. Second arc surface, 11. Connecting portion, 12. Roller. Detailed implementation manners

[0029] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0030] For the convenience of narration, if the words "upper", "lower", "left", and "right" appear in the present invention, they only represent the same directions as the upper, lower, left, and right directions of the drawings themselves, and do not limit the structure. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0031] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] Example 1:

[0033] Since the cage formed by integral injection molding is convenient for assembling and disassembling with the rollers, and at the same time, injection molding allows the cage to be designed into a complex structural form, which is convenient for the optimal design of the bearing, etc., it is widely used; however, after long-term use of the injection-molded cage, failure phenomena such as the chamfer at the window falling off, cracking, and the side beam on one side of the window opening being damaged or falling off occur; based on this, this embodiment provides a flat thrust segmented cage, which is formed into a ring structure by assembling at least two cage segments 1 along the circumferential direction, and the length of each cage segment 1 is determined according to the actual installation requirements.

[0034] As Figure 1 and Figure 2 shown, each cage segment 1 has a plurality of windows 6, and for different force requirements, the number of windows 6 included in the cage segment 1 is also different; in this embodiment, the cage segment 1 is provided with nine windows 6.

[0035] Specifically, the cage segment 1 mainly includes an outer rib 2, an inner rib 3, and cross beams 4. The inner rib 3 and the outer rib 2 have the same bending curvature, and the inner rib 3 and the outer rib 2 are connected by the cross beams 4. The cross beams 4 are evenly arranged along the arc length direction of the outer rib 2 and the inner rib 3. Windows 6 are formed between adjacent cross beams 4, and the rollers 12 are installed at the windows 6. In this embodiment, the side where the windows 6 install the rollers 12 is the installation surface.

[0036] For a normal cage, the rollers 12 are directly assembled into the windows 6, and the above-mentioned failure situations are likely to occur. Therefore, in this embodiment, a number of first stoppers 7 and second stoppers 8 are added at the windows 6, which can stably wrap the rollers 12 therein, increase the stability of the rollers 12, and extend the service life of the cage. According to Figure 1 and Figure 2 shown in the direction, the stopper structures are symmetrically arranged on the left and right sides of each window 6, that is, the first stoppers 7 are symmetrically arranged relative to the window 6, and the second stoppers 8 are also symmetrically arranged relative to the window 6, so that the stopper structures on both sides cooperate with each other to stably support both sides of the rollers 12.

[0037] The cage of this embodiment is a segmented structure. For each cage segment 1, the cross beams 4 at both ends are used as the end cross beams 4, and the remaining cross beams 4 between the two end cross beams 4 are the middle cross beams 4; since the end cross beams 4 are to be spliced with the other cage segments 1, therefore, the stopper structure is arranged on one side of the end cross beams 4, while the middle cross beams 4 are arranged with the stopper structures on both sides.

[0038] As Figures 1 - 3As shown, mounting grooves 5 are provided on the mounting sides of the cross beam 4 to ensure the mounting of the rollers 12 on both sides of the cross beam 4. In this embodiment, the mounting groove 5 is a trapezoidal groove, that is, the two side surfaces of the mounting groove 5 are inclined surfaces, and the two inclined surfaces are arranged in the radial direction of the cage, and the distance between the two inclined surfaces gradually decreases from top to bottom. The mounting groove 5 not only ensures the effective mounting of the roller 12, but also plays a role in weight reduction.

[0039] In this embodiment, as Figure 3 and Figure 4 shown, a first stop block 7 is installed on each of the left and right sides of the middle cross beam 4, and the first stop block 7 is centered in the mounting groove 5 so that the first stop block 7 corresponds to the middle position of the roller 12; the first stop block 7 is fixed to both the bottom surface of the mounting groove 5 and the inner wall of the window 6. Or rather, the first stop block 7 is fixed to the top edge of the window 6 and forms an interface with a certain depth with the inner wall of the window 6.

[0040] The first stop block 7 bends from the top of the cross beam 4 towards the side where the window 6 is located, so that its inner surface forms a first arc surface 9. The two first stop blocks 7 opposite to each other in the same window 6 cooperate with the upper half of the roller 12 to form a limit on the left and right directions of the upper half of the roller 12. The outer surface of the first stop block 7 can also be set to an arc-shaped structure. At the same time, in order to further limit the lower half of the roller 12, a second stop block 8 is provided in this embodiment. The second stop block 8 is provided on the inner walls on both sides of the window 6, and at least two second stop blocks 8 are provided on each inner wall of the window 6 to form an effective support for the roller 12.

[0041] It should be noted that the segmented cage in this embodiment is applicable to cylindrical rollers 12. As Figure 5 and Figure 6 shown, when the roller 12 is assembled with the cage, the axial direction of the roller 12 is along the radial direction of the cage. Taking the transverse center line of the roller 12 as the boundary, the upper half of the roller 12 is the part above the transverse center line, and the lower half of the roller 12 is the part below the transverse center line.

[0042] In this embodiment, two second stop blocks 8 are provided on each side of the window 6, and the distances between the two second stop blocks 8 and the first stop block 7 on the same side are the same, that is, the two second stop blocks 8 are symmetrically distributed with respect to the first stop block 7 on the same side; the three form an isosceles triangle distribution and jointly wrap the same side of the roller 12, and the stability effect is better. It can be understood that in other embodiments, three or more second stop blocks 8 can also be provided, specifically determined according to the axial length of the roller 12.

[0043] As Figure 4As shown in the figure, the second stopper 8 is arranged along the axial direction of the cage. The bottom surface of the second stopper 8 is flush with the bottom surface of the cross beam 4, and the second stopper 8 extends upward by a certain height. Among them, the top of the second stopper 8 is an arc section, and its inner surface is the second arc surface 10. The second arc surface 10 and the main body part of the second stopper 8 form a connecting part 11. When the roller 12 is wrapped in the stopper structure, the connecting part 11 contacts the outer surface of the roller 12 and plays a supporting role for the roller 12.

[0044] Since the first arc surface 9 of the first stopper 7 and the second arc surface 10 of the second stopper 8 cooperate to form a restriction on the roller 12, therefore, the arc formed by the longitudinal section of the first arc surface 9 and the arc formed by the longitudinal section of the second arc surface 10 can be projected onto the same circular surface, and this circular surface is adapted to the roller 12.

[0045] In this embodiment, the first stopper 7 and the second stopper 8 are symmetrically arranged respectively with respect to the same middle cross beam 4. Similarly, with respect to the same window 6, they are also symmetrically arranged respectively, and can form the same restrictions on both sides of the roller 12. For the same roller 12, the upper half of its left and right sides is restricted by two first stoppers 7, and the lower half is restricted by an even number of second stoppers 8, so that the roller 12 is stably covered in the cage and the service life is prevented from being affected by shaking.

[0046] Embodiment 2:

[0047] This embodiment provides a planar thrust bearing, which includes the segmented cage described in Embodiment 1, and also includes rollers 12, as Figure 5 and Figure 6 shown (only a single segment of the cage segment 1 is shown in the figure). The rollers 12 are arranged in the windows 6 of the segmented cage. Since the segmented cage is injection molded, when assembling the rollers 12 and the segmented cage, the rollers 12 can be pressed into the windows 6; through the common wrapping of the first stoppers 7 and the second stoppers 8, an effective limit on the rollers 12 is formed, the reliability of the bearing is increased, and the service life of the bearing is extended.

[0048] The bearing of this embodiment can be applied to the pitch bearing in wind power generation.

[0049] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A planar thrust segmented cage, characterized in that: It comprises at least two retainer segments, each retainer segment has a plurality of windows, and adjacent windows are separated by a crossbeam; a first stopper is symmetrically arranged on the mounting surface of the window, and a second stopper is symmetrically arranged on the inner walls on both sides of the window, the first stopper is used to wrap the upper half of the roller, and the second stopper is used to wrap the lower half of the roller.

2. A planar thrust segmented cage according to claim 1, characterized in that: The cross beam is provided with a mounting groove corresponding to the window mounting surface, and the first stopper is arranged in the mounting groove.

3. A planar thrust segmented cage according to claim 2, characterized in that: The mounting groove is a trapezoidal groove.

4. A planar thrust segmented cage according to claim 1, characterized in that: At least two second stoppers are arranged on the inner wall on each side of the window.

5. A planar thrust segmented cage according to claim 4, characterized in that: When two second stops are provided on the inner wall on each side of the window, the two second stops are symmetrically distributed relative to the first stops on the same side.

6. A planar thrust segmented cage according to any one of claims 1 to 5, characterized in that: The inner surface of the first stopper is a first arc surface, and the first arc surface extends to a set position on the inner wall of the window.

7. A planar thrust segmented cage according to any one of claims 1 to 5, characterized in that: One end of the second stopper close to the first stopper is an arc segment, and the inner surface of the arc segment is a second arc surface.

8. The planar thrust segmented cage according to claim 1, characterized in that: One end of the crossbeam is connected to the outer retaining edge, and the other end is connected to the inner retaining edge; The inner rib and the outer rib have the same curvature.

9. A planar thrust segmented cage according to claim 1, characterized in that: The segmented retainer is integrally injection molded.

10. A plane thrust bearing, characterized in that: It comprises a segmented retainer as described in any one of claims 1 to 9 and a roller installed on the segmented retainer.

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