A long-life ball bearing

Abstract

The utility model discloses a long-life ball bearing, which relates to the technical field of bearings. The technical scheme thereof is as follows: it comprises an inner ring, an outer ring and a retaining frame located between the outer ring and the inner ring, a plurality of balls are mounted on the retaining frame, and the inner ring and the outer ring are provided with an annular groove slidingly matched with the balls on the opposite sides thereof, and the retaining frame comprises two annular frames which are mutually clamped, and the ends of the two annular frames which are far from each other are fixedly connected with sealing covers, the outer edge of the sealing cover is fixedly mounted on the outer ring, and the inner edge of the sealing cover is sealingly rotated with the inner ring. When the ball bearing is installed, the retaining frame is installed to separate the balls, and the symmetrical radial spacing of the balls is maintained, so that the retaining frame can be stably mounted between the outer ring and the inner ring, thereby preventing the balls from shaking when rotating, so that the ball bearing can work more stably, improve the performance of the ball bearing, and have a longer service life.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, and more specifically, to a long-life ball bearing. Background Art

[0002] Ball bearings are a common mechanical element used to reduce friction between rotating machine parts and support loads on shafts. They get their name from the balls they contain, which roll between inner and outer rings, reducing friction and supporting loads on shafts. Ball bearings are key mechanical elements used in a wide range of engineering, manufacturing and transportation applications, and can be found in small household appliances as well as large industrial equipment, as they improve the efficiency and life of machines.

[0003] Ball bearings are usually composed of an inner ring, an outer ring, balls and a cage. There is usually a certain gap between the balls and the inner and outer rings. The existence of bearing clearance is vital to the normal operation of the bearing because it allows the bearing to adapt to temperature changes, assembly errors, thermal expansion and other factors during rotation. However, due to the existence of bearing clearance, the balls may shake during rotation, which will reduce the performance of the ball bearing, accelerate the wear of the balls, and cause instability in the entire system.

[0004] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0005] The purpose of the utility model is to provide a long-life ball bearing in order to solve the above-mentioned problems.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a long-life ball bearing, comprising an inner ring, an outer ring and a retaining frame located between the outer ring and the inner ring, a plurality of balls are installed on the retaining frame, and the inner ring and the outer ring are provided with annular grooves slidingly matched with the balls on the opposite sides, the retaining frame comprises two annular frames that are clamped to each other, and the ends of the two annular frames that are away from each other are fixedly connected with sealing covers, the outer edge of the sealing cover is fixedly installed on the outer ring, the inner edge of the sealing cover is sealed with the inner ring, and the sealing cover and the inner ring rotate with each other.

[0007] By adopting the above technical solution, when installing the ball bearing, the balls are installed between the inner ring and the outer ring, and then the balls are separated by installing the retaining frame to maintain the symmetrical radial spacing of the balls. At the same time, since the sealing cover is fixed to the outer ring, the retaining frame can be stably installed between the outer ring and the inner ring, thereby preventing the balls from shaking when rotating, allowing the ball bearing to work more stably, improving the performance of the ball bearing, and making it have a longer service life.

[0008] The utility model is further configured as follows: the annular frame includes a raised portion that fits with the ball and a connecting portion located between two adjacent raised portions, wherein a convex column is provided on the connecting portion of one of the annular frames, and a groove that is clamped with the convex column is provided on the connecting portion of the other annular frame.

[0009] By adopting the above technical solution, the raised portion fits with the ball, increasing the contact area between the annular frame and the ball, ensuring the limiting effect of the annular frame on the ball, and the existence of the connecting portion ensures that there will be no collision between adjacent balls. The two annular frames are connected by means of a convex column and a groove, and the connection is simple and reliable.

[0010] The utility model is further configured as follows: an annular cavity for storing lubricating oil is arranged inside the outer ring, a cavity connected to the annular cavity is arranged between the sealing cover and the retaining frame, and a through hole connected to the cavity is arranged on the raised portion.

[0011] By adopting the above technical solution, when the ball bearing is working, the lubricating oil in the annular cavity will flow into the cavity, and then flow into the ball between the two protrusions through the through hole, thereby reducing the friction between the ball and the protrusion, the inner ring, and the outer ring, reducing heat generation, and extending the service life.

[0012] The utility model is further configured as follows: the through holes are multiple and distributed in an array.

[0013] By adopting the above technical solution, the lubricating oil flows out from a plurality of through holes, so that the lubricating oil is applied more evenly.

[0014] The utility model is further configured as follows: a liquid inlet hole communicating with the annular cavity is arranged on the outer ring, and a sealing plug is installed on the liquid inlet hole.

[0015] By adopting the above technical solution, the lubricating oil is added into the annular cavity through the liquid inlet hole, and the sealing plug is tightened after the filling is completed to prevent the leakage of the lubricating oil.

[0016] The utility model is further configured as follows: the outer ring is provided with a recessed groove which is engaged with the sealing cover, the recessed groove is provided with a plurality of threaded holes in a circumferential array, the sealing cover is provided with through holes which correspond one to one with the threaded holes, and the sealing cover is fixed to the outer ring by screws.

[0017] By adopting the above technical solution, after the two annular frames are clamped together, the sealing cover is located in the sink groove, and then the sealing cover is rotated to make the perforations correspond to the threaded holes one by one, and the sealing cover is fixed to the outer ring by screws, thereby ensuring that the annular frame fixedly connected to the sealing cover will not shake.

[0018] The utility model is further configured as follows: the cross section of one end of the sealing cover that is rotatably matched with the inner ring is arc-shaped.

[0019] By adopting the above technical solution, the arc-shaped cross-section makes the sealing cover and the inner ring fit more closely, thereby improving the sealing performance of the ball bearing and preventing external dust particles from entering the bearing and affecting the rotation of the ball.

[0020] The utility model is further configured as follows: the inner ring, the outer ring, the retaining frame and the balls are all made of aluminum alloy material.

[0021] By adopting the above technical solution and utilizing the characteristics of aluminum alloy materials such as light weight, good strength and good corrosion resistance, ball bearings can have more usage scenarios and longer service life.

[0022] In summary, the utility model has the following beneficial effects:

[0023] When installing the ball bearing, the balls are installed between the inner ring and the outer ring, and then the balls are separated by installing the retaining frame to maintain the symmetrical radial spacing of the balls. At the same time, since the sealing cover is fixed to the outer ring, the retaining frame can be stably installed between the outer ring and the inner ring, thereby preventing the balls from shaking when rotating, allowing the ball bearing to work more stably, improving the performance of the ball bearing, and making it have a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the retainer in the utility model;

[0026] Figure 3 It is a schematic diagram of the structure of the cage and the ball in the utility model;

[0027] Figure 4 It is a cross-sectional view of the utility model.

[0028] Figure numerals: 1. outer ring; 2. inner ring; 3. sealing cover; 4. screw; 5. countersunk groove; 6. raised portion; 7. connecting portion; 8. ball; 9. annular groove; 10. annular cavity; 11. cavity; 12. through hole; 13. sealing plug; 14. liquid inlet hole; 15. boss; 16. groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] like Figure 1 , Figure 2 , Figure 3 As shown, a long-life ball bearing comprises an inner ring 2, an outer ring 1 and a retainer located between the outer ring 1 and the inner ring 2, a plurality of balls 8 are mounted on the retainer, and an annular groove 9 for slidingly cooperating with the balls 8 is arranged on the opposite sides of the inner ring 2 and the outer ring 1. When installing the ball bearing 8, the balls 8 are installed between the inner ring 2 and the outer ring 1, and then the balls 8 are separated by installing the retainer to maintain the symmetrical radial spacing of the balls 8. The retainer comprises two annular frames that are clamped to each other, and the annular frames comprise a raised portion that fits with the balls 8. 6 and a connecting portion 7 located between two adjacent protrusions 6, wherein a convex column 15 is provided on the connecting portion 7 of one annular frame, and a groove 16 engaged with the convex column 15 is provided on the connecting portion 7 of the other annular frame. The protrusion 6 fits with the ball 8, increasing the contact area between the annular frame and the ball 8, ensuring the limiting effect of the annular frame on the ball 8. The existence of the connecting portion 7 ensures that there will be no collision between adjacent balls 8. The two annular frames are connected by the convex column 15 and the groove 16, and the connection is simple and reliable.

[0031] like Figure 1 and Figure 2 As shown, the ends of the two annular frames that are away from each other are fixedly connected with sealing covers 3, and the outer edges of the sealing covers 3 are fixedly installed on the outer ring 1, so that the retaining frame can be stably installed between the outer ring 1 and the inner ring 2, thereby preventing the ball 8 from shaking during rotation, so that the ball bearing 8 can work more stably, improve the performance of the ball bearing 8, and make it have a longer service life. The outer ring 1 is provided with a sink groove 5 that is clamped with the sealing cover 3, and the sink groove 5 is provided with a plurality of threaded holes in a circumferential array. The sealing cover 3 is provided with perforations that correspond to the threaded holes one by one, and the sealing cover 3 is fixed to the outer ring 1 by screws 4. After the two annular frames are engaged with each other, the sealing cover 3 is located in the sink groove 5. The sealing cover 3 is rotated again to make the perforations correspond to the threaded holes one by one, and the sealing cover 3 is fixed to the outer ring 1 by screws 4, thereby ensuring that the annular frame fixedly connected to the sealing cover 3 will not shake. The cross-section of one end of the sealing cover 3 that rotates with the inner ring 2 is arc-shaped. The sealing cover 3 and the inner ring 2 rotate with each other, and the cross-section of one end of the sealing cover 3 close to the inner ring 2 is arc-shaped. The arc-shaped cross-section makes the sealing cover 3 fit the inner ring 2 more closely, thereby improving the sealing performance of the ball bearing 8 and preventing external dust particles from entering the bearing and affecting the rotation of the ball 8.

[0032] like Figure 4As shown, an annular cavity 10 for storing lubricating oil is provided in the outer ring 1, a liquid inlet hole 14 connected with the annular cavity 10 is provided on the outer ring 1, a sealing plug 13 is installed on the liquid inlet hole 14, and the lubricating oil is added into the annular cavity 10 through the liquid inlet hole 14. After filling, the sealing plug 13 is tightened to prevent leakage of the lubricating oil. A cavity 11 connected with the annular cavity 10 is provided between the sealing cover 3 and the retaining frame, and a through hole 12 connected with the cavity 11 is provided on the ridge 6. When the ball bearing 8 is working, the lubricating oil in the annular cavity 10 will flow into the cavity 11, and then flow into the ball 8 located between the two ridges 6 through the through hole 12, thereby reducing the friction between the ball 8 and the ridge 6, the inner ring 2, and the outer ring 1, reducing the generation of heat, and extending the service life. There are several through holes 12 and they are distributed in an array. The lubricating oil flows out from multiple through holes 12, so that the lubricating oil can be more evenly applied to the ball 8.

[0033] like Figure 2 As shown, the inner ring 2, the outer ring 1, the retaining frame and the ball 8 are all made of aluminum alloy materials. The characteristics of aluminum alloy materials such as light weight, good strength and good corrosion resistance are utilized to make the ball 8 bearing have more usage scenarios and longer service life.

[0034] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A long-life ball bearing, comprising an inner ring (2), an outer ring (1) and a cage located between the outer ring (1) and the inner ring (2), wherein a plurality of balls (8) are mounted on the cage, characterized in that: The inner ring (2) and the outer ring (1) are both provided with an annular groove (9) that is slidably matched with the ball (8) on the opposite side, and the retaining frame includes two annular frames that are clamped to each other, and the ends of the two annular frames that are away from each other are fixedly connected with a sealing cover (3), the outer edge of the sealing cover (3) is fixedly installed on the outer ring (1), the inner edge of the sealing cover (3) is sealed with the inner ring (2), and the sealing cover (3) and the inner ring (2) rotate relative to each other.

2. A long-life ball bearing according to claim 1, characterized in that: The annular frame comprises a raised portion (6) fitted with a ball (8) and a connecting portion (7) located between two adjacent raised portions (6), wherein a convex column (15) is arranged on the connecting portion (7) of one of the annular frames, and a groove (16) engaged with the convex column (15) is arranged on the connecting portion (7) of the other annular frame.

3. A long-life ball bearing according to claim 2, characterized in that: An annular cavity (10) for storing lubricating oil is arranged inside the outer ring (1), a cavity (11) connected to the annular cavity (10) is arranged between the sealing cover (3) and the retaining frame, and a through hole (12) connected to the cavity (11) is arranged on the raised portion (6).

4. A long-life ball bearing according to claim 3, characterized in that: The through holes (12) are in a plurality and distributed in an array.

5. A long-life ball bearing according to claim 3, characterized in that: The outer ring (1) is provided with a liquid inlet hole (14) which is in communication with the annular cavity (10), and a sealing plug (13) is installed on the liquid inlet hole (14).

6. A long-life ball bearing according to claim 1, characterized in that: The outer ring (1) is provided with a recessed groove (5) which is engaged with the sealing cover (3); the recessed groove (5) is provided with a plurality of threaded holes in a circumferential array; the sealing cover (3) is provided with through holes which correspond one to one with the threaded holes; the sealing cover (3) and the outer ring (1) are fixed by screws (4).

7. A long-life ball bearing according to claim 6, characterized in that: The cross section of one end of the sealing cover (3) that is rotatably engaged with the inner ring (2) is arc-shaped.

8. The long-life ball bearing according to claim 1, characterized in that: The inner ring (2), the outer ring (1), the retaining frame and the balls (8) are all made of aluminum alloy material.

Images