Box type thrust retainer
By setting a plurality of oil-through holes on the radial outer and inner sides of the cage body to form a connected box-like space, the problem of small lubricant oil flow space is solved, the lubrication efficiency and cooling effect are improved, and the service life of the bearing is extended.
Patent Information
- Application Number
- CN202421825329.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The cage of box-type thrust needle roller bearings results in a small lubricant flow space, resulting in a low lubricant flow rate, which makes it impossible to effectively cool down, resulting in early failure of the bearing.
A plurality of oil-through holes are provided on the radially outer and inner sides of the cage body to form a connected box-like space to increase the flow space of lubricating oil.
It improves lubrication efficiency, reduces the probability of early failure of bearings due to insufficient lubrication, and effectively takes away heat inside the bearing, alleviating the problem of excessive temperature.
Smart Images
Figure CN222811093U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearings, in particular to a box-type thrust retainer. Background Art
[0002] The cage assembly of the thrust needle roller bearing includes a cage and a plurality of rolling elements arranged on the cage. During the operation of the bearing, lubricating oil needs to be added to reduce friction and wear, lower the temperature of the bearing, and prevent corrosion and oxidation.
[0003] The cage assembly structure of a conventional box-type thrust needle roller bearing is as follows: Figure 1 and Figure 2 As shown, it is an integrated structure, including a retainer body and a plurality of rolling elements 200 arranged on the retainer body 100. The retainer body 100 is formed by riveting an outer box cover 101 and an inner box cover 102. During the use of the bearing, the lubricating oil flows into the working area of the needle roller along the gap between the bearing and the mating raceway.
[0004] During the use of thrust bearings, most of the operating conditions are oil spray lubrication. Since the box-type thrust needle roller bearing retainer wraps around the needle roller, the space for the lubricating oil to flow is small, which may lead to a low lubricating oil flow rate. When the bearing works at a high temperature, it cannot be effectively cooled, resulting in early failure of the bearing. Utility Model Content
[0005] The utility model aims to provide a box-type thrust retainer, which is convenient for lubricating oil to enter the retainer for lubrication.
[0006] Based on the above problems, the technical solution provided by the utility model is:
[0007] A box-type thrust cage comprises a cage body and a plurality of rolling elements arranged on the cage body, the cage body is provided with a plurality of pockets arranged at intervals along the circumferential direction, the rolling elements are arranged in the pockets, and a box-shaped space communicating with the plurality of pockets is formed inside the cage body:
[0008] A plurality of first oil holes communicating with the box-shaped space are provided on the radially outer side of the retainer body, and a plurality of second oil holes communicating with the box-shaped space are provided on the radially inner side of the retainer body.
[0009] In some of the embodiments, the number of the plurality of first oil holes and the plurality of second oil holes is consistent with the number of the plurality of rolling elements.
[0010] In some embodiments, the plurality of first oil through holes and the plurality of second oil through holes are arranged opposite to each other along the radial direction of the retainer body.
[0011] In some of the embodiments, the plurality of first oil holes, the plurality of rolling elements, and the plurality of second oil holes are sequentially arranged along the radial direction of the retainer body.
[0012] In some embodiments, the plurality of first oil holes and the plurality of second oil holes are arranged alternately.
[0013] In some embodiments, the retainer body includes an outer box cover and an inner box cover that are connected to each other, and the outer box cover is covered on the outside of the inner box cover to form the box-shaped space.
[0014] In some embodiments, the first oil hole includes a first through hole arranged on the radially outer side of the outer box cover and a second through hole arranged on the radially outer side of the inner box cover, and the second through hole is arranged corresponding to the first through hole.
[0015] In some embodiments, the second oil hole includes a third through hole arranged on the radial inner side of the outer box cover and a fourth through hole arranged on the radial inner side of the inner box cover, and the fourth through hole is arranged corresponding to the third through hole.
[0016] Compared with the prior art, the advantages of the utility model are:
[0017] (1) A plurality of first oil holes are arranged on the radial outer side of the retainer body, and a plurality of second oil holes are arranged on the radial inner side of the retainer body, which increases the flow space of the lubricating oil, improves the lubrication efficiency, and can effectively reduce the probability of early failure of the bearing due to insufficient lubrication;
[0018] (2) Ensure that the bearing is fully lubricated. At the same time, the lubricating oil flow rate is greatly improved. When the bearing runs at high speed, it can effectively take away the heat inside the bearing and alleviate the phenomenon of excessive temperature during the operation of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] 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.
[0020] Figure 1 It is a structural schematic diagram of a box-shaped thrust cage in the prior art;
[0021] Figure 2 It is a structural schematic diagram of a cage body of a box-shaped thrust cage in the prior art;
[0022] Figure 3 It is a structural schematic diagram of an embodiment of a box-type thrust cage of the utility model;
[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of an embodiment of the utility model;
[0024] in:
[0025] 100, cage body; 101, outer cover; 102, inner cover; 103, pocket; 200, rolling element;
[0026] 1. Cage body; 1-1. First oil hole; 1-2. Second oil hole; 1-3. Outer cover; 1-3a. First through hole; 1-3b. Second through hole; 1-4. Inner cover; 1-4a. Third through hole; 1-4b. Fourth through hole; 1-5. Pocket hole;
[0027] 2. Rolling elements. DETAILED DESCRIPTION
[0028] 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.
[0029] like Figure 3 and Figure 4 As shown, an embodiment of the utility model is provided, which provides a box-type thrust retainer, including a retainer body 1 and a plurality of rolling bodies 2 arranged on the retainer body 1, a plurality of pockets 1-5 arranged at intervals along the circumferential direction are provided on the retainer body 1, and the plurality of rolling bodies 2 are arranged in the corresponding pockets 1-5, and a box-shaped space connecting the plurality of pockets 1-5 is formed inside the retainer body 1.
[0030] Specifically, the retainer body 1 includes an outer box cover 1-3 and an inner box cover 1-4 which are riveted to each other, and the outer box cover 1-3 is covered on the outside of the inner box cover 1-4 to form a box-shaped space.
[0031] In order to ensure that the rolling elements of the bearing are fully lubricated, a plurality of first oil holes 1--1 connected to the box-shaped space are provided on the radial outer side of the cage body 1, and a plurality of second oil holes 1-2 connected to the box-shaped space are provided on the radial inner side of the cage body 1. The oil holes are respectively provided on the radial inner and outer sides of the cage body 1 to increase the flow space of the lubricating oil. The lubricating oil can enter the cage through the first oil holes 1-1 or the second oil holes 1-2 to fully lubricate the rolling elements 2. When the bearing runs at high speed, the heat in the cage can be taken away to avoid bearing failure.
[0032] In this example, the first oil hole 1-1 includes a first through hole 1-3a disposed on the radially outer side of the outer box cover 1-3 and a second through hole 1-4a disposed on the radially outer side of the inner box cover 1-4, and the second through hole 1-4a is disposed correspondingly to the first through hole 1-3a. The second oil hole 1-2 includes a third through hole 1-3b disposed on the radially inner side of the outer box cover 1-3 and a fourth through hole 1-4b disposed on the radially inner side of the inner box cover 1-4, and the fourth through hole 1-4b is disposed correspondingly to the third through hole 1-3b.
[0033] In order to ensure sufficient lubrication performance, the number of the plurality of first oil holes 1 - 1 and the number of the plurality of second oil holes 1 - 2 is consistent with the number of the plurality of rolling elements 2 .
[0034] In this example, a plurality of first oil holes 1-1 and a plurality of second oil holes 1-2 are arranged radially opposite to each other along the retaining frame body 1, that is, the corresponding first oil holes 1-1 and second oil holes 1-2 are arranged on the same straight line in the radial direction of the retaining frame body 1, and the plurality of first oil holes 1-1, the plurality of second oil holes 1-2 and the plurality of rolling bodies 2 are arranged alternately, that is, a group of first oil holes 1-1 and second oil holes 1-2 are arranged between two adjacent rolling bodies 2.
[0035] In other embodiments, a plurality of first oil holes 1-1, a plurality of rolling bodies 2, and a plurality of second oil holes 1-2 are arranged in sequence along the radial direction of the retaining frame body 1, that is, each group of first oil holes 1-1, rolling bodies 2, and second oil holes 1-2 are arranged on the same straight line in the radial direction of the retaining frame body 1.
[0036] In other embodiments, a plurality of first oil holes 1-1 and a plurality of second oil holes 1-2 are staggered, that is, the first oil holes 1-1 and the second oil holes 1-2 are not arranged on the same straight line in the radial direction of the retaining frame body 1, wherein the first oil holes 1-1 / the second oil holes 1-2 may be arranged corresponding to the rolling elements 2 or not.
[0037] Generally, the above-mentioned retainer is not used in conjunction with the shaft ring and the seat ring. The retainer is set between the two raceways. The lubricating oil can enter the inside of the retainer body 1 through the first oil hole 1-1 on the radial outer side of the retainer body 1, and then be discharged from the second oil hole 1-2, which can ensure the full lubrication of the rolling element 2, take away the heat in the retainer, avoid the influence of high temperature on the retainer, and increase the service life of the retainer. It should be understood that the retainer can also be used in conjunction with the shaft ring and the seat ring, but it is necessary to ensure that the first oil hole 1-1 and the second oil hole 1-2 remain open.
[0038] In summary, the cage increases the flow space of the lubricating oil, improves the lubrication efficiency, and is convenient for cooling the cage, thereby increasing the service life of the cage.
[0039] 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 box-type thrust cage, comprising a cage body and a plurality of rolling elements arranged on the cage body, wherein the cage body is provided with a plurality of pockets arranged at intervals along the circumferential direction, the rolling elements are arranged in the pockets, and a box-shaped space connecting the plurality of pockets is formed inside the cage body, characterized in that: A plurality of first oil holes communicating with the box-shaped space are provided on the radially outer side of the retainer body, and a plurality of second oil holes communicating with the box-shaped space are provided on the radially inner side of the retainer body.
2. The box-type thrust cage according to claim 1, characterized in that: The number of the plurality of first oil holes and the plurality of second oil holes is consistent with the number of the plurality of rolling elements.
3. The box-type thrust cage according to claim 2, characterized in that: The plurality of first oil through holes and the plurality of second oil through holes are arranged opposite to each other along the radial direction of the retainer body.
4. The box-type thrust cage according to claim 3, characterized in that: The plurality of first oil holes, the plurality of rolling bodies, and the plurality of second oil holes are sequentially arranged along the radial direction of the retainer body.
5. The box-type thrust cage according to claim 2, characterized in that: The plurality of first oil holes and the plurality of second oil holes are arranged alternately.
6. The box-type thrust cage according to claim 1, characterized in that: The retainer body comprises an outer box cover and an inner box cover which are connected to each other, and the outer box cover is covered on the outside of the inner box cover to form the box-shaped space.
7. The box-type thrust cage according to claim 6, characterized in that: The first oil through hole includes a first through hole arranged on the radial outer side of the outer box cover and a second through hole arranged on the radial outer side of the inner box cover, and the second through hole is arranged corresponding to the first through hole.
8. The box-type thrust cage according to claim 7, characterized in that: The second oil through hole includes a third through hole arranged on the radial inner side of the outer box cover and a fourth through hole arranged on the radial inner side of the inner box cover, and the fourth through hole is arranged corresponding to the third through hole.