Combined retainer of turntable bearing

Abstract

The utility model relates to a turntable bearing retainer, in particular to a combined retainer of a turntable bearing. The combined retainer comprises an axial retainer and a radial retainer, the axial retainer is formed by combining a plurality of axial sub retainers, and first axial pockets and second axial pockets are formed in the axial retainer in a staggered manner and are used for mounting axial rollers; the radial retainer is formed by combining a plurality of radial sub retainers, and radial pockets are formed in the radial retainer at intervals and used for mounting radial rollers; the first axial pocket, the second axial pocket and the radial pocket are of a self-locking limiting structure. Compared with the prior art, according to the scheme, the distance between the retainer and the raceway is effectively controlled, it is guaranteed that the retainer does not make contact with the raceway, the retainer is prevented from rubbing the raceway face, and the problems that the integral retainer of an annular structure warps and deforms greatly are solved.

Description

Technical Field

[0001] The utility model relates to a rotating disk bearing retaining frame, in particular to a combined retaining frame of a rotating disk bearing. Background Art

[0002] The slewing bearing is a large bearing with a special structure that can withstand large axial loads, radial loads, overturning moments and other combined loads at the same time, and integrates multiple functions such as support, rotation, transmission, and fixation. Its main function is to establish connections between equipment components so that the components can rotate relative to each other. When working, it usually performs low-speed heavy-load rotational motion or intermittent swing. It is widely used in the rotating devices of machinery such as lifting, metallurgy, mining, construction, ports, ships, and wind turbines.

[0003] The slewing bearing is mainly composed of inner ring, outer ring, rolling element and cage;

[0004] Inner ring: usually connected to the rotating parts by bolts;

[0005] Outer ring: usually connected to the supporting structure by bolts;

[0006] Rolling element: located between the inner ring and the outer ring, reducing friction, transferring load, and realizing relative rotational motion between the inner and outer rings.

[0007] Cage: used to separate rolling elements, maintain their correct arrangement position, and prevent risks such as contact and collision between rolling elements.

[0008] In addition, slewing bearings often have mounting holes, lubrication holes and sealing devices to meet the needs of installation, lubrication and sealing.

[0009] The existing slewing bearings usually have the following problems and phenomena in their applications: 1) The contact friction between the cage and the rolling elements and the bearing guide surface is large and the wear is severe; 2) The rollers cannot effectively support the cage, and the cage rubs against the bearing raceway; 3) The integral annular structure cage is prone to warping and large deformation, which can easily lead to the failure of the slewing bearing.

[0010] Therefore, it is necessary to propose a new type of retainer suitable for a slewing bearing to overcome at least one of the above problems. Utility Model Content

[0011] The purpose of the present invention is to solve at least one of the above problems and to propose a new type of combined cage suitable for a slewing bearing. This solution can effectively control the distance between the cage and the raceway, prevent the cage from rubbing against the raceway surface, and avoid problems such as warping and large deformation of the integral annular structure cage.

[0012] The purpose of the utility model is achieved through the following technical solutions:

[0013] A combined cage of a slewing bearing, comprising an axial cage and a radial cage;

[0014] The axial cage is composed of a plurality of axial sub-cages, and the axial sub-cages are staggered with axial first pockets and axial second pockets for mounting axial rollers;

[0015] The radial cage is composed of a plurality of radial sub-cages, and the radial sub-cages are provided with radial pockets for mounting radial rollers.

[0016] The first axial pocket, the second axial pocket and the radial pocket are all self-locking and limiting structures.

[0017] The setting positions of the axial cage and the radial cage are determined according to the positions of the axial raceway and the radial raceway. Usually, the axial raceway and the radial raceway are arranged concentrically, and the corresponding axial cage and the radial cage are also mostly arranged concentrically.

[0018] Preferably, the first axial pocket and the second axial pocket are respectively provided with a large port A and a small port B, the width of the large port A is greater than the width of the small port B, and the widths of the large port A and the small port B are both smaller than the diameter of the axial roller. The axial roller is loaded into the axial retainer from the large port A. During the loading process, there is a certain interference between the axial roller and the large port A, and a slight press is required to ensure that the axial roller is smoothly loaded into the first axial pocket / the second axial pocket. After loading, the axial roller is located at the arc of the first axial pocket / the second axial pocket, and will not slide freely from the large port A during operation. At the same time, the width of the small port B is smaller than the diameter of the axial roller, so that the axial roller is locked and limited in the first axial pocket / the second axial pocket, that is, self-locking limit is achieved.

[0019] Preferably, the adjacent axial first pockets and the adjacent axial second pockets are in a positive and negative cross structure (distribution form). The positive and negative cross distribution form, that is, one axial first pocket is arranged with the large port A facing downward, and the adjacent axial second pocket is arranged with the large port A facing upward; the self-locking of the axial roller and the control of the distance between the axial retainer and the axial raceway are achieved through the alternating arrangement, ensuring that there is no contact between the axial retainer and the axial raceway.

[0020] Preferably, the axial sub-cage includes at least a pair of axial first pockets and an axial second pocket.

[0021] Preferably, the radial pocket is provided with a large port C and a small port D, the width of the large port C is greater than the width of the small port D, and the widths of the large port C and the small port D are both smaller than the diameter of the radial roller; the large port C is arranged toward the first outer ring. The radial roller is loaded into the radial retainer from the large port C. During the loading process, there is a certain interference between the radial roller and the large port C. The radial roller needs to be pressed slightly to ensure that the radial roller is smoothly loaded into the radial pocket. The loaded radial roller is located at the arc of the radial pocket and will not slide freely from the large port C during operation. At the same time, the width of the small port D is smaller than the diameter of the radial roller, so that the radial roller is locked and limited in the radial hole, that is, self-locking and limiting is achieved.

[0022] Preferably, the radial sub-cage is provided with an oil storage groove on the crossbeam between adjacent radial pockets.

[0023] Preferably, the oil storage tank is a slot with a triangular cross-section.

[0024] The setting of the oil storage tank has the following two functions:

[0025] 1. Reduce the probability of pores during processing;

[0026] 2. Used to store grease;

[0027] This can ensure good lubrication conditions between the radial cage and the radial raceway.

[0028] Preferably, the axial sub-cage and the radial sub-cage are made of synthetic material.

[0029] Preferably, the synthetic material is a high molecular polymer material.

[0030] Preferably, the high molecular polymer material is nylon, POM or PEEK.

[0031] When the combined cage is used in a slewing bearing:

[0032] The combined retainer is assembled between the outer ring and the inner ring of the turntable bearing;

[0033] The axial roller is assembled in the first axial pocket / second axial pocket. The assembled axial roller and axial cage are installed in the upper and lower axial raceways of the slewing bearing, mainly bearing the axial load and overturning moment.

[0034] The radial rollers are assembled in the radial pockets. The assembled radial rollers and radial cages are installed in the radial raceways of the slewing bearings and mainly bear radial loads.

[0035] Compared with the prior art, the utility model has the following beneficial effects:

[0036] 1. Avoid warping and large deformation of the integral ring cage

[0037] The axial cage and radial cage are structured in a segmented combination, which can effectively avoid the warping and large deformation problems caused by the integral annular structure;

[0038] 2. Reduce friction, reduce wear, improve lubrication and extend service life

[0039] 1) Use synthetic materials (polymers such as nylon, POM or PEEK) as the main material of the turntable bearing cage. Such materials have certain self-lubricating properties, which can effectively reduce the friction between the cage and the rolling elements and the guide surface of the ring, reduce the wear between the components and the metal particles generated by the wear, and effectively improve the lubrication conditions in the bearing;

[0040] 2) The axial cage structure adopts the form of cross-distribution of pockets in both positive and negative directions, and the pockets have a self-locking design. This structural design can effectively avoid contact between the axial cage and the raceway surface during operation, prevent the cage from rubbing against the bearing raceway, and effectively improve the lubrication performance of the bearing raceway surface and extend the service life of the bearing;

[0041] 3) The large port C of the radial cage pocket faces the radial raceway of the first outer ring (the width of the small port D is smaller than the radial roller diameter), and the pocket has a self-locking design. This structural design can avoid contact between the radial cage and the raceway surface during operation, prevent the cage from rubbing against the raceway, and can effectively improve the lubrication performance of the bearing raceway surface and extend the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic cross-sectional view of the structure of the axial cage, axial rollers and axial raceways;

[0043] Figure 2 It is a schematic cross-sectional view of the structure of the radial cage, radial rollers and radial raceways;

[0044] Figure 3 It is a schematic diagram of the structure after the axial cage and the radial cage are combined;

[0045] Figure 4 It is a schematic cross-sectional view of a local structure of a slewing bearing;

[0046] In the figure: 1-axial retainer; 11-axial sub-retainer; 11-1-axial first pocket; 11-2-axial second pocket; 11-3-large port A; 11-4-small port B; 2-radial retainer; 21-radial sub-retainer; 21-1-radial pocket; 21-2-large port C; 21-3-small port D; 3-axial roller; 4-radial roller; 5-axial raceway; 6-radial raceway; 7-first outer ring; 8-second outer ring; 9-inner ring. DETAILED DESCRIPTION

[0047] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] Example 1

[0049] A combined cage of a slewing bearing, such as Figure 1-3 , comprising an axial cage 1 and a radial cage 2;

[0050] The axial retainer 1 is composed of a plurality of axial sub-retainers 11, such as Figure 1-3 As shown, the axial sub-cage 1 is provided with an axial first pocket 11-1 and an axial second pocket 12-1 at intervals, for mounting the axial roller 3;

[0051] The radial cage 2 is composed of a plurality of radial sub-cages 21. The radial sub-cages 2 are provided with radial pockets 21-1 for mounting radial rollers 4.

[0052] The first axial pocket 11 - 1 , the second axial pocket 11 - 2 and the radial pocket 21 - 1 are all self-locking and limiting structures.

[0053] A slewing bearing using the above combined retainer, such as Figure 4 As shown, it includes a first outer ring 7, a second outer ring 8, an inner ring 9, an axial roller 3, a radial roller 4 and the combined cage as described above;

[0054] The combined retainer is assembled between the first outer ring 7, the second outer ring 8 and the inner ring 9;

[0055] The axial roller 3 is assembled in the first axial pocket 11-1 and the second axial pocket 11-2. The assembled axial roller 3 and the axial retainer 1 are installed in the upper and lower axial raceways 5 of the slewing bearing, and mainly bear the axial load and overturning moment; the radial roller 4 is assembled in the radial pocket 21-1. The assembled radial roller 4 and the radial retainer 2 are installed in the radial raceway 6 of the slewing bearing, and mainly bear the radial load.

[0056] The positions of the axial retainer 1 and the radial retainer 2 are determined according to the positions of the axial raceway 5 and the radial raceway 6 in the slewing bearing. The axial raceway 5 is perpendicular to the central axis of rotation, and the radial raceway 6 is parallel to the central axis of rotation.

[0057] More specifically, in this embodiment:

[0058] The combined cage is composed of an axial cage 1 and a radial cage 2, which are used to mount axial rollers 3 and radial rollers 4 respectively.

[0059] The axial cage 1 is composed of several Figure 1 The axial sub-cages 11 shown are combined into a ring ( Figure 3 ), the axial sub-cage 11 is provided with at least one axial first pocket hole 11-1 and one axial second pocket hole 11-2. Among them, the two ends of the axial first pocket hole 11-1 and the axial second pocket hole 11-2 are respectively provided with a through large port A11-3 and a small port B11-4, which are used to install the axial roller 3 and perform self-locking limit. The width of the large port A11-3 is greater than the width of the small port B11-4, and the widths of the large port A11-3 and the small port B11-4 are both smaller than the diameter of the axial roller 3. The axial roller 3 is respectively installed into the axial first pocket hole 11-1 and the axial second pocket hole 11-2 of the axial sub-cage 11 from the large port A11-3. During the installation process, the axial roller 3 has a certain interference with the large port A11-3, and a slight press is required to ensure that the axial roller 3 is smoothly installed into the axial first pocket hole 11-1 and the axial second pocket hole 11-2, and the installed axial roller 3 is The arc position between the axial first pocket 11-1 and the axial second pocket 11-2 of the axial sub-retainer 11 can no longer escape from the large port A11-3, thus achieving self-locking, nor can it escape from the small port B11-4, thus achieving limitation; further, the adjacent axial first pocket 11-1 and axial second pocket 11-2 are arranged in a positive and negative cross distribution form, and after the axial retainer 1 is assembled in the slewing bearing, the support between the axial raceway 5 and the axial roller 3 and the self-locking limiting structure can ensure that the axial retainer 1 does not come into contact with the surface of the axial raceway 5 during operation, thereby preventing friction between the axial retainer 1 and the surface of the axial raceway 5, which can effectively improve the lubrication conditions of the surface of the axial raceway 5 and extend the service life of the slewing bearing. Specifically, Figure 1 As shown, the inner wall of the first axial pocket 11-1 and the second axial pocket 11-2 is a straight face section-arc face section-straight face section from the large port A11-3 to the small port B11-4, and the curvature of the arc face section matches the surface curvature of the axial roller 3, ensuring the normal rotation of the axial roller 3 during operation.

[0060] The radial cage 2 is composed of several Figure 2 The radial sub-cage 21 is combined into a ring ( Figure 3 ,), the radial sub-cage 21 is provided with a plurality of radial pockets 21-1 in parallel. The radial pockets 21-1 are also open at both ends, namely the large port C21-2 and the small port D21-3, wherein the width of the large port C21-2 is greater than the width of the small port D21-3, and the widths of the large port C21-2 and the small port D21-3 are less than the diameter of the radial roller 4. The radial roller 4 is installed into the radial pocket 21-1 of the radial cage 21 from the large port C21-2. During the installation process, there is a certain interference between the radial roller 4 and the large port C21-2, and it is necessary to lightly Slightly press to ensure that the radial roller 4 is smoothly installed in the radial pocket 21-1, and the installed radial roller 4 is in the arc position of the radial pocket 21-1 of the radial retainer 21, and can no longer escape from the large port C21-2, realizing self-locking, and can no longer escape from the small port D21-3, realizing limit. Different from the axial sub-retainer 11, the radial pocket 21-1 is arranged in the same direction on the radial sub-retainer 21, and the large port C21-2 is arranged toward the radial raceway 6 of the outer ring. After the radial sub-retainer 21 is combined into an annular radial retainer 2, the self-locking limit structure can avoid the radial retainer 2 from contacting the surface of the radial raceway 6 during operation, thereby preventing friction between the radial retainer 2 and the surface of the radial raceway 6, which can effectively improve the lubrication conditions of the surface of the radial raceway 6 and extend the service life of the turntable bearing. In the radial cage 2 , an oil storage groove with a triangular cross section is provided between adjacent radial pockets 21 - 1 on the same radial sub-cage 21 and on the side facing the radial raceway 6 of the inner ring 9 .

[0061] Since the radial cage 2 and the axial cage 1 in the combined cage are both composed of a plurality of sub-cages, that is, a segmented combination is adopted, the warping and large deformation problems caused by the overall annular structure can be effectively avoided.

[0062] The axial retainer 1 and the radial retainer 2 are both made of synthetic materials, which are specifically high molecular polymer materials such as nylon, POM, PEEK, etc. This type of material has certain self-lubricating properties, which can effectively reduce the friction between the combined retainer and the rolling elements and the bearing guide surface, reduce the wear between the components and the metal particles generated by the wear, and effectively improve the lubrication conditions in the bearing.

[0063] The structure of the turntable bearing using the above-mentioned combined cage is as follows: Figure 4, wherein the combined cage is assembled between the first outer ring 7, the second outer ring 8 and the inner ring 9; a radial raceway 6 is provided in the middle of the inner ring 9, and the radial cage 2 is installed in the radial raceway 6; and the axial cage 1 is installed in the axial raceways 5 on both sides; the axial rollers 3 and the radial rollers 4 are respectively installed in the pockets of the axial cage 1 and the radial cage 2. The first outer ring 7, the second outer ring 8 and the inner ring 9 are installed together to limit the combined cage.

[0064] When the combined cage is installed in a slewing bearing:

[0065] 1. The axial roller 3 is installed in the axial sub-cage 11 to form an axial cage 1 group. The axial roller 3 contacts the surface of the axial raceway 5. The axial sub-cage 11 always maintains a certain distance from the surface of the axial raceway 5. Figure 1 As shown;

[0066] 2. The radial roller 4 is installed in the radial sub-cage 21 to form a radial cage 2 group. The radial roller 4 contacts the surface of the radial raceway 6. The radial sub-cage 21 always maintains a certain distance from the surface of the radial raceway 6. Figure 2 As shown;

[0067] 3. Assemble multiple groups of axial sub-cages 11 and radial sub-cages 21 respectively, such as Figure 3 As shown;

[0068] 4. The assembled cage groups are located in the axial raceway 5 and radial raceway 6 of the slewing bearing, respectively. Figure 4 shown.

[0069] In summary, this plan:

[0070] 1. The structure adopts a segmented combination form to avoid the warping and large deformation problems caused by the integral annular cage structure, and at the same time has the advantage of easy assembly;

[0071] 2. The material is made of high molecular polymer, which has the advantage of self-lubrication and is easy and quick to assemble;

[0072] 3. The axial cage 1 adopts a self-locking pocket hole positive and negative cross distribution design, which has the advantages of reducing friction, reducing wear, improving lubrication and extending service life;

[0073] 4. The radial cage 2 adopts a self-locking pocket design, which has the advantages of reducing friction, reducing wear, improving lubrication and extending service life.

[0074] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.

Claims

1. A combined retainer for a slewing bearing, characterized in that: It comprises an axial retainer (1) and a radial retainer (2); The axial retainer (1) is composed of a plurality of axial sub-retainers (11) in combination, and the axial sub-retainers (11) are provided with axial first pocket holes (11-1) and axial second pocket holes (11-2) alternately arranged on the axial sub-retainers (11) for mounting axial rollers (3); The radial retainer (2) is composed of a plurality of radial sub-retainers (21) in combination, and the radial sub-retainer (21) is provided with radial pockets (21-1) for mounting radial rollers (4); The first axial pocket (11-1), the second axial pocket (11-2) and the radial pocket (21-1) are all self-locking limiting structures.

2. The combined retainer of a slewing bearing according to claim 1, characterized in that: The first axial pocket (11-1) and the second axial pocket (11-2) are respectively provided with a large port A (11-3) and a small port B (11-4); the width of the large port A (11-3) is greater than the width of the small port B (11-4); and the widths of the large port A (11-3) and the small port B (11-4) are both smaller than the diameter of the axial roller (3).

3. The combined retainer of a slewing bearing according to claim 2, characterized in that: The adjacent first axial pocket holes (11-1) and second axial pocket holes (11-2) are in a positive and negative cross structure.

4. The combined retainer of a slewing bearing according to claim 1, characterized in that: The axial sub-cage (11) comprises at least a pair of axial first pocket holes (11-1) and an axial second pocket hole (11-2).

5. The combined retainer of a slewing bearing according to claim 1, characterized in that: The radial pocket (21-1) is provided with a large port C (21-2) and a small port D (21-3); the width of the large port C (21-2) is greater than the width of the small port D (21-3); and the widths of the large port C (21-2) and the small port D (21-3) are both smaller than the diameter of the radial roller (4); and the large port C (21-2) is arranged toward the first outer ring (7) of the slewing bearing.

6. The combined retainer of a slewing bearing according to claim 5, characterized in that: The radial sub-cage (21) is provided with an oil storage groove on the crossbeam between adjacent radial pockets (21-1).

7. The combined retainer of a slewing bearing according to claim 6, characterized in that: The oil storage tank is a slot with a triangular cross section.

8. The combined retainer of a slewing bearing according to claim 1, characterized in that: The material of the axial sub-cage (11) and the radial sub-cage (21) is a synthetic material.

9. The combined retainer of a slewing bearing according to claim 8, characterized in that: The synthetic material is a high molecular polymer material.

10. The combined retainer of a slewing bearing according to claim 9, characterized in that: The high molecular polymer material is nylon, POM or PEEK.

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