Roller bearing capable of automatically aligning
By designing the curved raceway and convex surface with automatic centering in the roller bearing, combined with the design of ring grooves and oil injection holes, the problem of roller friction when the shaft is inclined in traditional bearings is solved, achieving more stable rolling and more Long service life.
Patent Information
- Application Number
- CN202421459764.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-06-25
AI Technical Summary
When the shaft of the traditional center-aligning roller bearing is inclined, the rollers are prone to cause large sliding friction in the arc-surface slide, resulting in a decrease in rolling stability and a shortened bearing service life.
A roller bearing is designed that can be automatically centered, by providing arcuate convex surfaces and arcuate raceways on the shaft connection sleeve, and first and second placement ring grooves on the inner ring, in which the rollers are placed Slide inside to reduce friction while inject lubricating oil through the oil injection hole to reduce friction.
It effectively reduces the rotational friction and resistance of the rotating shaft, improves the rotation direction of the roller and the rolling stability of the arc slide, and extends the service life of the bearing.
Smart Images
Figure CN222458085U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearings, in particular to an automatically aligning roller bearing. Background Art
[0002] Traditionally, roller bearings are mostly used. The rollers slide in the raceways to reduce the friction and resistance of the shaft. They are the most commonly used bearings in mechanical equipment. When it is necessary to install bearings on both ends of the shaft to reduce the resistance, the two bearings are difficult to keep at the same level during installation, resulting in the shaft being slightly tilted and difficult to identify with the naked eye when installed between the two bearings. At this time, during the rotation of the shaft, the bearings are affected by radial or axial forces, causing the rollers to rub against the inner wall of the raceway, resulting in shaft shaking and bearing damage.
[0003] The spherical roller bearing can change with the skew of the shaft to adapt to the use state of the shaft. The roller bearing is a kind of rolling bearing and is one of the components widely used in modern machinery. It relies on the rolling contact between the main components to support the rotating parts. Most roller bearings are now standardized. Roller bearings have the advantages of small starting torque, high rotation accuracy, and easy selection. Roller bearings mainly include spherical roller bearings, thrust spherical roller bearings, tapered rollers and cylindrical roller bearings.
[0004] like Figure 1 As shown, the spherical roller bearing in the prior art includes an outer ring 1', an inner ring 2' arranged on the outer ring 1', a spherical roller 3' arranged between the outer ring 1' and the inner ring 2', and an arcuate slideway 4' opened on the end surface of the outer ring 1' close to the inner ring 2'. When the installation positions of the two spherical roller bearings are not at the same level, the spherical rollers are skewed on the arcuate slideway of the outer ring, thereby reducing the radial force or axial force on the bearing during the rotation of the shaft, which can improve the rotation stability of the shaft and the service life of the bearing.
[0005] However, when the roller is skewed in the arc surface slide, as the shaft rotates, the spherical roller slides at an angle in the arc surface raceway. During this process, the roller is prone to generate greater sliding friction in the arc surface slide, which not only fails to improve the rolling stability of the roller in the arc surface slide, but also easily affects the service life of the bearing. Utility Model Content
[0006] The utility model aims to address the defects and shortcomings of the prior art and to provide an automatically aligning roller bearing which can improve the rotation direction of the roller and the rolling stability of the roller on the curved slideway during the process and is not likely to affect the service life of the bearing.
[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an automatically aligning roller bearing, comprising an outer ring, an inner ring arranged on the outer ring, and also comprising an arcuate raceway opened on the end face of the outer ring close to the inner ring, an arcuate convex surface arranged on the end face of the inner ring close to the arcuate raceway for clearance fit with the arcuate raceway, a first placement ring groove opened on the inner ring and away from the end face of the outer ring, a rotating shaft connecting sleeve arranged on the inner ring, a second placement ring groove opened on the end face of the rotating shaft connecting sleeve close to the first placement ring groove, and a plurality of rollers arranged between the inner ring and the rotating shaft connecting sleeve and located in the first placement ring groove and the second placement ring groove, the center position of the arcuate raceway is the same as that of the arcuate convex surface, the center position of the arcuate raceway and the arcuate convex surface is on the central axis of the inner ring, and the rollers are clearance fit with the first placement ring groove and the second placement ring groove.
[0008] A further improvement is that an oil filling hole is provided on the top surface of the outer ring, and the lower end of the oil filling hole is connected to the arc raceway.
[0009] A further improvement is that: an annular oil injection channel is provided on the outer ring, at least one oil injection hole is provided, and the oil injection hole is arranged on the top surface of the outer ring and is located on the annular oil injection channel.
[0010] A further improvement is that the roller is a cylindrical roller, the first placement ring groove and the second placement ring groove are concave grooves, and the first placement ring groove and the second placement ring groove form a limiting area that restricts the cylindrical roller between the inner ring and the rotating shaft connecting sleeve.
[0011] A further improvement is that the roller is a tapered roller, the first placement ring groove and the second placement ring groove are concave inclined grooves, and the first placement ring groove and the second placement ring groove form a limiting area that restricts the tapered roller between the inner ring and the rotating shaft connecting sleeve.
[0012] A further improvement is that the roller is a spherical roller, the first placement ring groove and the second placement ring groove are arc grooves, and the first placement ring groove and the second placement ring groove form a limiting area that restricts the spherical roller between the inner ring and the rotating shaft connecting sleeve.
[0013] After adopting the above technical scheme, the beneficial effects of the utility model are as follows: the sleeve is mounted on the rotating shaft through the rotating shaft connection, and when the rotating shaft tilts, the arc convex surface follows the tilt in the arc raceway, and during the rotation of the rotating shaft, the rollers slide in the first placement ring groove and the second placement ring groove, thereby reducing the rotational friction and resistance of the rotating shaft. Compared with traditional spherical roller bearings, the position of the rollers will not change in the process of following the tilt of the rotating shaft, thereby reducing the friction of the rollers when sliding, and can improve the rotation direction of the rollers and the rolling stability of the rollers on the arc surface slideway in the process, and it is not easy to affect the service life of the bearings.
[0014] Further effect: Lubricating oil can be injected into the gap between the arc raceway and the arc convex surface through the oil injection hole, thereby reducing the friction force on the arc raceway during the deflection of the arc convex surface and increasing the service life of the bearing.
[0015] Further effect: the lubricating oil can be dripped onto the annular oil injection channel, and the lubricating oil can penetrate from the oil injection hole into the gap between the arc-shaped raceway and the arc-shaped convex surface through the annular oil injection channel. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, 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 labor.
[0017] Figure 1 It is a structural schematic diagram of a spherical roller bearing in the prior art;
[0018] Figure 2 It is a structural schematic diagram of the utility model;
[0019] Figure 3 It is a schematic diagram of the skewed state of the inner ring in the utility model;
[0020] Figure 4 This is an exploded view of the outer ring, inner ring, shaft connecting sleeve and roller in the utility model;
[0021] Figure 5 It corresponds to Figure 2 A magnified view of part A;
[0022] Figure 6 It is another structural schematic diagram of the roller in the utility model;
[0023] Figure 7 It is another structural schematic diagram of the roller in the utility model.
[0024] Explanation of the reference numerals: outer ring 1, inner ring 2, arcuate raceway 3, arcuate convex surface 4, first placement annular groove 5, shaft connecting sleeve 6, second placement annular groove 7, oil filling hole 8, annular oil filling channel 9, cylindrical roller 10, limiting area 11, tapered roller 12, spherical roller 13. DETAILED DESCRIPTION
[0025] The utility model is now further described in conjunction with the accompanying drawings and specific embodiments.
[0026] See also Figures 2 to 7 As shown, the technical solution adopted in this specific embodiment is: an automatically aligning roller bearing, comprising an outer ring 1, an inner ring 2 arranged on the outer ring 1, and also comprising an arcuate raceway 3 opened on the end face of the outer ring 1 close to the inner ring 2, an arcuate convex surface 4 arranged on the end face of the inner ring 2 close to the arcuate raceway 3 for clearance fit with the arcuate raceway 3, a first placement ring groove 5 opened on the inner ring 2 and away from the end face of the outer ring 1, a rotating shaft connecting sleeve 6 arranged on the inner ring 2, a second placement ring groove 7 opened on the end face of the rotating shaft connecting sleeve 6 close to the first placement ring groove 5, and a plurality of rollers arranged between the inner ring 2 and the rotating shaft connecting sleeve 6 and located in the first placement ring groove 5 and the second placement ring groove 7, the arcuate raceway 3 and the arcuate convex surface 4 have the same center position, the center position of the arcuate raceway 3 and the arcuate convex surface 4 are on the central axis of the inner ring 2, and the rollers are clearance fit between the first placement ring groove 5 and the second placement ring groove 7. Several rollers can be arranged in a single row on the central vertical line of the inner ring 2 and the central axis of the shaft connecting sleeve 6, or can be arranged symmetrically on the central vertical line of the inner ring 2 and the central axis of the shaft connecting sleeve 6. The outer ring 1 can be set as a seat or a block, and the arc raceway 3 is opened on the seat or the block. The cooperation between the arc raceway 3 and the arc convex surface 4 can restrict the inner ring 2 on the outer ring 1 after being installed as a whole, and the arc raceway 3 is skewed as the shaft tilts.
[0027] An oil injection hole 8 is provided on the top surface of the outer ring 1 , and the lower end of the oil injection hole 8 is connected to the arc raceway 3 .
[0028] The outer ring 1 is provided with an annular oil injection channel 9 , and at least one oil injection hole 8 is provided. The oil injection hole 8 is arranged on the top surface of the outer ring 1 and is located on the annular oil injection channel 9 .
[0029] The roller is a cylindrical roller 10, the first placement ring groove 5 and the second placement ring groove 7 are concave grooves, and the first placement ring groove 5 and the second placement ring groove 7 form a limit area 11 that limits the cylindrical roller between the inner ring 2 and the shaft connecting sleeve 6. Circular arc chamfers are provided at the four corners of the cylindrical roller 10, and circular arc chamfers are also provided on the first placement ring groove 5 and the second placement ring groove 7 on the inner ring 2 and the shaft connecting sleeve 6. The cylindrical roller 10 can also be in the shape of a waist drum.
[0030] like Figure 6 As shown, the roller is a tapered roller 12, the first placement ring groove 5 and the second placement ring groove 7 are concave inclined grooves, and the first placement ring groove 5 and the second placement ring groove 7 form a limiting area 11 that limits the tapered roller 12 between the inner ring 2 and the rotating shaft connecting sleeve 6.
[0031] like Figure 7 As shown, the roller is a spherical roller 13, the first placement ring groove 5 and the second placement ring groove 7 are arc grooves, and the first placement ring groove 5 and the second placement ring groove 7 form a limiting area 11 that limits the spherical roller 13 between the inner ring 2 and the shaft connecting sleeve 6.
[0032] The working principle of the utility model is as follows: the shaft connecting sleeve 6 is installed on the shaft, and when the shaft tilts, the arc convex surface 4 automatically follows the tilt in the arc raceway 3, and during the rotation of the shaft, the rollers slide in the first placement ring groove 5 and the second placement ring groove 7, thereby reducing the rotation friction and resistance of the shaft. Compared with the traditional spherical roller bearings, the position of the rollers will not change during the process of following the tilt of the shaft, thereby reducing the friction of the rollers during sliding, and can improve the rotation direction of the rollers and the rolling stability of the rollers on the arc surface slideway during the process, which is not easy to affect the service life of the bearing, and can be automatically adjusted according to the tilt angle of the shaft when the shaft tilts.
[0033] The utility model is intended to protect the structure of the product. The model of each component is not the content of the utility model, and it is also a known technology. Any component on the market that can achieve the above-mentioned function of the utility model can be selected and applied as a self-aligning roller bearing. Therefore, the model and other parameters of the component are not described in detail in this utility model. The contribution of this utility model lies in the scientific combination of various components.
[0034] The above shows and describes the basic principle and main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents. Anything not described in detail in the utility model is a well-known technology of those skilled in the art.
Claims
1. An automatically aligning roller bearing, comprising an outer ring and an inner ring disposed on the outer ring, characterized in that: It also includes an arcuate raceway opened on the end face of the outer ring close to the inner ring, an arcuate convex surface arranged on the inner ring close to the end face of the arcuate raceway for gap matching with the arcuate raceway, a first placement ring groove opened on the inner ring and away from the end face of the outer ring, a rotating shaft connecting sleeve arranged on the inner ring, a second placement ring groove opened on the rotating shaft connecting sleeve close to the end face of the first placement ring groove, and a plurality of rollers arranged between the inner ring and the rotating shaft connecting sleeve and located in the first placement ring groove and the second placement ring groove. The center position of the arcuate raceway is the same as that of the arcuate convex surface, and the center position of the arcuate raceway and the arcuate convex surface is on the central axis of the inner ring. The rollers are gap matched with the first placement ring groove and the second placement ring groove.
2. The self-aligning roller bearing according to claim 1, characterized in that: An oil filling hole is provided on the top surface of the outer ring, and the lower end of the oil filling hole is connected with the arc raceway.
3. The self-aligning roller bearing according to claim 2, characterized in that: The outer ring is provided with an annular oil injection channel, and at least one oil injection hole is provided. The oil injection hole is arranged on the top surface of the outer ring and is located on the annular oil injection channel.
4. The self-aligning roller bearing according to claim 1, characterized in that: The roller is a cylindrical roller, the first placement ring groove and the second placement ring groove are concave grooves, and the first placement ring groove and the second placement ring groove form a limiting area that limits the cylindrical roller between the inner ring and the rotating shaft connecting sleeve.
5. The self-aligning roller bearing according to claim 1, characterized in that: The roller is a tapered roller, the first placement ring groove and the second placement ring groove are concave inclined grooves, and the first placement ring groove and the second placement ring groove form a limiting area that limits the tapered roller between the inner ring and the rotating shaft connecting sleeve.
6. The self-aligning roller bearing according to claim 1, characterized in that: The roller is a spherical roller, the first placement ring groove and the second placement ring groove are arc grooves, and the first placement ring groove and the second placement ring groove form a limiting area that limits the spherical roller between the inner ring and the rotating shaft connecting sleeve.