Ultralow-temperature deep groove ball bearing

Abstract

The utility model provides an ultralow-temperature deep groove ball bearing, which belongs to the technical field of deep groove ball bearings and comprises an outer ring. The inner ring is arranged between the inner walls of the outer ring, and an annular groove is formed between the outer ring and the inner ring; the number of the annular clamps is two, the two annular clamps are parallel to the gap between the outer ring and the inner ring, a plurality of balls are arranged between the two annular clamps in a rolling mode, the balls are located in the annular grooves, the two sealing rings are pulled to move towards the gap between the outer ring and the inner ring, and the two sealing rings are prevented from falling off from the gap between the outer ring and the inner ring. And then the ultralow-temperature deep groove ball bearing is integrally embedded in the mounting hole, and after the ultralow-temperature deep groove ball bearing is integrally recovered to the normal temperature, the ultralow-temperature deep groove ball bearing is integrally clamped in the mounting hole, so that the ultralow-temperature deep groove ball bearing can be integrally mounted through liquid nitrogen cold contraction, and the situation that the sealing ring is dismounted in advance and mounted after being embedded is avoided; the installation process of the ultralow-temperature deep groove ball bearing is shortened, so that the ultralow-temperature deep groove ball bearing is time-saving

Description

Technical Field

[0001] The utility model belongs to the technical field of deep groove ball bearings, and particularly relates to an ultra-low temperature deep groove ball bearing. Background Art

[0002] Deep groove ball bearings are suitable for operation at high speeds or even extremely high speeds, and are very durable, requiring little maintenance. Such bearings have a small friction coefficient, a high limiting speed, and a wide range of sizes and forms. They are used in industries such as precision instruments, low-noise motors, automobiles, motorcycles, and general machinery. They are the most widely used type of bearing in the machinery industry, mainly bearing radial loads and also capable of bearing a certain amount of axial loads. Ultra-low temperature deep groove ball bearings are a type of deep groove ball bearing. During the installation process, low-temperature liquid nitrogen is used for cold shrinkage, and then the ultra-low temperature deep groove ball bearing is embedded and installed in the installation hole. After the ultra-low temperature deep groove ball bearing expands to room temperature, it is fastened in the installation hole.

[0003] The authorized publication number "CN216554992U" discloses "relating to the technical field of bearings. It has a delicate structure and good lubrication effect. It includes an inner ring and an outer ring. The outer ring is sleeved outside the inner ring. A cage is provided between the inner ring and the outer ring. A number of balls are arranged on the cage. A receiving groove is provided on the outer wall of the inner ring. The receiving grooves are connected end to end to form a ring. The balls slide in the receiving grooves in a fitting manner; a receiving cavity is also provided inside the inner ring. A first through hole is provided on the outer wall of the inner ring. The first through hole communicates the receiving cavity and the receiving groove. A cylindrical lubricating grease is inserted in the first through hole in a fitting manner. One end of the lubricating grease is located in the receiving cavity, and the other end of the lubricating grease passes through the first through hole and extends into the receiving groove. The other end of the lubricating grease is in contact with the balls".

[0004] The above patent realizes the movement of the lubricating grease and the overflow of the lubricating oil through the pressure generated by pressing the lever and the piston. It has a delicate structure, reliable and continuous lubrication effect, effectively reduces the wear of the bearing, and improves the service life of the bearing. In the existing ultra-low temperature deep groove ball bearings, during the installation process, since the sealing rings on both sides of the ultra-low temperature deep groove ball bearing are extremely likely to be immersed in liquid nitrogen, they are extremely likely to fall off between the inner ring and the outer ring due to cold shrinkage. In the installation specification process of the ultra-low temperature deep groove ball bearing, it is necessary to disassemble and embed the sealing rings in advance before installation, resulting in a complex and cumbersome installation process for the ultra-low temperature deep groove ball bearing, making the installation of the ultra-low temperature deep groove ball bearing time-consuming and laborious. Therefore, we propose an ultra-low temperature deep groove ball bearing. Content of the Utility Model

[0005] The purpose of the present utility model is to provide an ultra-low temperature deep groove ball bearing, aiming to solve the problem that the sealing rings on both sides of the ultra-low temperature deep groove ball bearing are extremely likely to be immersed in liquid nitrogen during the process, and are extremely likely to fall off from between the inner ring and the outer ring due to cold shrinkage, resulting in the need to disassemble and embed the sealing rings in advance during the installation specification process of the ultra-low temperature deep groove ball bearing, making the installation process of the ultra-low temperature deep groove ball bearing complex and cumbersome, and making the installation of the ultra-low temperature deep groove ball bearing time-consuming and laborious.

[0006] To achieve the above purpose, the present utility model provides the following technical solutions:

[0007] An ultra-low temperature deep groove ball bearing, including an outer ring;

[0008] An inner ring, the inner ring is arranged between the inner walls of the outer ring, and an annular groove is opened between the outer ring and the inner ring;

[0009] An annular clip, there are two annular clips, the two annular clips are parallel to the gap between the outer ring and the inner ring, and a plurality of balls roll between the two annular clips, and the plurality of balls are located in the annular groove;

[0010] Sealing rings, there are two sealing rings, the two sealing rings are arranged between the outer ring and the inner ring; and

[0011] An elastic mechanism, the elastic mechanism is arranged in the gap between the outer ring and the inner ring, and the elastic mechanism is connected to the two sealing rings to limit the two sealing rings.

[0012] As a preferred solution of the present utility model, the elastic mechanism includes a telescopic component and a clamping component, the telescopic component is arranged in the gap between the outer ring and the inner ring, the telescopic component is connected to the two sealing rings, the clamping component is arranged between the outer ring and the inner ring, and the clamping component is connected to the sealing rings.

[0013] As a preferred solution of the present utility model, the telescopic component includes a fixed sleeve, a telescopic rod and a spring, there are a plurality of fixed sleeves, the plurality of fixed sleeves are fixedly connected between the two annular clips, and the two ends of the plurality of fixed sleeves extend to the side ends of the two annular clips, there are a plurality of telescopic rods, the plurality of telescopic rods are inserted into the plurality of fixed sleeves, the plurality of telescopic rods are connected to the two sealing rings, there are a plurality of springs, the plurality of springs are sleeved on the circumferential surfaces of the plurality of telescopic rods, and the plurality of springs are located in the plurality of fixed sleeves.

[0014] As a preferred solution of the present utility model, the clamping component includes a plurality of annular bevel grooves, the plurality of annular bevel grooves are opened on the inner wall of the gap between the outer ring and the inner ring, and the plurality of annular bevel grooves correspond to the two sealing rings, and the truncation of the plurality of annular bevel grooves presents a 45-degree angle.

[0015] As a preferred embodiment of the present utility model, the cross-sections of the two sealing rings are in an "M" shape, and the inner and outer ring surfaces of the two sealing rings are inserted into the two annular bevel grooves.

[0016] As a preferred embodiment of the present utility model, a plurality of oil injection holes are provided on the outer end surfaces of the two sealing rings.

[0017] As a preferred embodiment of the present utility model, a plurality of clamping grooves are provided between the circumferential inner walls of the inner ring.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] 1. In this solution, the ultra-low temperature deep groove ball bearing is immersed in liquid nitrogen as a whole to achieve cold shrinkage of the ultra-low temperature deep groove ball bearing as a whole. During the process of overall liquid nitrogen cold shrinkage of the ultra-low temperature deep groove ball bearing, a plurality of springs push a plurality of telescopic rods through extrusion, pulling the two sealing rings to move into the gaps between the outer ring and the inner ring, preventing the two sealing rings from falling off from the gaps between the outer ring and the inner ring. Then, the ultra-low temperature deep groove ball bearing is integrally embedded in the mounting hole. When the ultra-low temperature deep groove ball bearing returns to normal temperature as a whole, the ultra-low temperature deep groove ball bearing is integrally clamped in the mounting hole, realizing the overall installation of the ultra-low temperature deep groove ball bearing by liquid nitrogen cold shrinkage, eliminating the need for prior disassembly and subsequent installation of the sealing rings, shortening the installation process of the ultra-low temperature deep groove ball bearing, and making the installation of the ultra-low temperature deep groove ball bearing time-saving and labor-saving.

[0020] 2. In this solution, the plurality of annular bevel grooves are provided to accommodate the two sealing rings. At the same time, the truncation of the plurality of annular bevel grooves forms a 45-degree angle, which is used to strengthen the clamping of the two sealing rings, ensuring that the two sealing rings are in contact with the 45-degree inclined surfaces of the plurality of annular bevel grooves, reducing the corrosion and oxidation of the inner ring and the parts inside the sealing rings by dust and water vapor, and improving the sealing performance of the ultra-low temperature deep groove ball bearing.

[0021] 3. In this solution, the cross-section of the sealing ring is in an "M" shape, which can utilize the elastic force generated by the "M" shape to push the inner and outer annular surfaces of the two sealing rings to fit with the 45-degree inclined surfaces of the plurality of annular bevel grooves. At the same time, the "M"-shaped cross-section can improve the structural strength of the two sealing rings and increase the structural strength of the ultra-low temperature deep groove ball bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, but do not constitute a limitation to the present utility model. In the drawings:

[0023] Figure 1 is a three-dimensional view of the ultra-low temperature deep groove ball bearing of the present utility model;

[0024] Figure 2This is the first partial cross-sectional view of the ultra-low temperature deep groove ball bearing of the present utility model;

[0025] Figure 3 This is the first half cross-sectional view of the ultra-low temperature deep groove ball bearing of the present utility model;

[0026] Figure 4 This is the ultra-low temperature deep groove ball bearing of the present utility model Figure 3 A enlarged view;

[0027] Figure 5 This is the second partial cross-sectional view of the ultra-low temperature deep groove ball bearing of the present utility model;

[0028] Figure 6 This is the second half cross-sectional view of the ultra-low temperature deep groove ball bearing of the present utility model;

[0029] Figure 7 This is the ultra-low temperature deep groove ball bearing of the present utility model Figure 6 B enlarged view;

[0030] Figure 8 This is the exploded view of the ultra-low temperature deep groove ball bearing of the present utility model.

[0031] In the figure: 1, outer ring; 2, inner ring; 3, sealing ring; 4, annular clamp; 5, ball; 6, fixed sleeve; 7, telescopic rod; 8, spring; 9, annular bevel groove; 11, clamping groove; 12, oil injection hole; 13, annular groove. Specific implementation mode

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0033] Embodiment 1

[0034] Refer to Figure 1 - Figure 7 , the ultra-low temperature deep groove ball bearing includes:

[0035] Outer ring 1;

[0036] Inner ring 2, the inner ring 2 is arranged between the inner walls of the outer ring 1, and an annular groove 13 is provided between the outer ring 1 and the inner ring 2;

[0037] Annular clamp 4, there are two annular clamps 4, the two annular clamps 4 are parallel to the gap between the outer ring 1 and the inner ring 2, and a plurality of balls 5 roll between the two annular clamps 4, and the plurality of balls 5 are located in the annular groove 13;

[0038] A seal ring 3, there are two seal rings 3, and the two seal rings 3 are arranged between the outer ring 1 and the inner ring 2; and

[0039] An elastic mechanism is arranged between the gaps of the outer ring 1 and the inner ring 2. The elastic mechanism is connected to the two seal rings 3 to limit the two seal rings 3.

[0040] In the present utility model, the outer ring 1 and the inner ring 2 are axially concentric. The gap between the outer ring 1 and the inner ring 2 is used to accommodate two annular clips 4, two seal rings 3, a plurality of balls 5 and an elastic component. The two annular clips 4 are used to clamp the plurality of balls 5 to limit the rolling of the plurality of balls. The two seal rings 3 are used to prevent dust and water vapor from entering the gap between the outer ring 1 and the inner ring 2.

[0041] The elastic mechanism includes a telescopic component and a clamping component. The telescopic component is arranged in the gap between the outer ring 1 and the inner ring 2. The telescopic component is connected to the two seal rings 3. The clamping component is arranged between the outer ring 1 and the inner ring 2. The clamping component is connected to the seal ring 3.

[0042] In the present utility model, the elastic component is used to limit the movement of the two seal rings 3, and the clamping component fixes the two seal rings 3.

[0043] The telescopic component includes a fixed sleeve 6, a telescopic rod 7 and a spring 8. There are a plurality of fixed sleeves 6. The plurality of fixed sleeves 6 are fixedly connected between the two annular clips 4, and both ends of the plurality of fixed sleeves 6 extend to the side ends of the two annular clips 4. There are a plurality of telescopic rods 7. The plurality of telescopic rods 7 are inserted into the plurality of fixed sleeves 6. The plurality of telescopic rods 7 are connected to the two seal rings 3. There are a plurality of springs 8. The plurality of springs 8 are sleeved on the circumferential surface of the plurality of telescopic rods 7. The plurality of springs 8 are located in the plurality of fixed sleeves 6.

[0044] In the present utility model, the plurality of fixed sleeves 6 are used to accommodate the telescopic movement of the plurality of telescopic rods 7. The plurality of telescopic rods 7 limit the maximum movement range of the two seal rings 3 through the telescopic movement with the plurality of fixed sleeves 6. The plurality of springs 8 are special springs resistant to low temperature. The plurality of springs 8 pull the two seal rings 3 to move closer by squeezing the plurality of telescopic rods 7. During the overall liquid nitrogen cold shrinking process of the ultra-low temperature deep groove ball bearing, the plurality of springs 8 push the plurality of telescopic rods 7 by extrusion, pulling the two seal rings 3 to move into the gap between the outer ring 1 and the inner ring 2, avoiding the two seal rings 3 from falling off the gap between the outer ring 1 and the inner ring 2, thus ensuring that the ultra-low temperature deep groove ball bearing can be installed by liquid nitrogen cold shrinking as a whole, reducing the need for pre-disassembly and post-embedding installation of the seal ring, shortening the installation process of the ultra-low temperature deep groove ball bearing, and making the installation of the ultra-low temperature deep groove ball bearing time-saving and labor-saving.

[0045] The clamping component includes a plurality of annular bevel grooves 9, which are opened on the inner wall of the gap between the outer ring 1 and the inner ring 2, and the plurality of annular bevel grooves 9 correspond to the two sealing rings 3. The truncation of the plurality of annular bevel grooves 9 presents a 45-degree angle.

[0046] In the present utility model, the opening of the plurality of annular bevel grooves 9 is used to accommodate the two sealing rings 3. At the same time, the truncation of the plurality of annular bevel grooves 9 presents a 45-degree angle, which is used to strengthen the clamping of the two sealing rings 3, ensuring that the two sealing rings 3 are attached to the 45-degree inclined surfaces of the plurality of annular bevel grooves 9, reducing the corrosion and oxidation of the parts inside the inner ring 2 and the sealing rings 3 by dust and water vapor, and improving the sealing performance of the ultra-low temperature deep groove ball bearing.

[0047] The cross-sections of the two sealing rings 3 are in an "M" shape, and the inner and outer ring surfaces of the two sealing rings 3 are inserted into the two annular bevel grooves 9.

[0048] In the present utility model, the cross-section of the sealing ring 3 is in an "M" shape, which can utilize the elastic force caused by the "M" shape to push the inner and outer annular surfaces of the two sealing rings 3 to fit with the 45-degree inclined surfaces of the plurality of annular bevel grooves 9. At the same time, the "M" shaped cross-section can improve the structural strength of the two sealing rings 3 and increase the structural strength of the ultra-low temperature deep groove ball bearing.

[0049] A plurality of oil injection holes 12 are opened on the outer end faces of the two sealing rings 3.

[0050] In the present utility model, the opening of the plurality of oil injection holes 12 is used to inject lubricating oil into the gap between the outer ring 1 and the inner ring 2, reducing the wear of the plurality of balls 5.

[0051] A plurality of clamping grooves 11 are opened between the circumferential inner walls of the inner ring 2.

[0052] In the present utility model, the opening of the plurality of clamping grooves 11 is used to embed and clamp the shaft rod, facilitating the fixation of the shaft rod to the inner ring 2.

[0053] The installation process of the ultra-low temperature deep groove ball bearing provided by the present utility model is as follows:

[0054] Immerse the ultra-low temperature deep groove ball bearing as a whole into liquid nitrogen to achieve the cold shrinkage of the ultra-low temperature deep groove ball bearing as a whole. During the process of overall liquid nitrogen cold shrinkage of the ultra-low temperature deep groove ball bearing, a plurality of springs 8 push a plurality of telescopic rods 7 through extrusion, pulling the two sealing rings 3 to move into the gap between the outer ring 1 and the inner ring 2, preventing the two sealing rings 3 from falling off the gap between the outer ring 1 and the inner ring 2. Then, embed the ultra-low temperature deep groove ball bearing as a whole into the installation hole. When the ultra-low temperature deep groove ball bearing as a whole returns to normal temperature, clamp the ultra-low temperature deep groove ball bearing as a whole in the installation hole, realizing the overall installation of the ultra-low temperature deep groove ball bearing by liquid nitrogen cold shrinkage, eliminating the need for prior disassembly and subsequent installation of the sealing rings, shortening the installation process of the ultra-low temperature deep groove ball bearing, and making the installation of the ultra-low temperature deep groove ball bearing time-saving and labor-saving.

[0055] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Ultra-low temperature deep groove ball bearing, characterized in that: include; Outer ring (1); An inner ring (2), the inner ring (2) being arranged between the inner walls of the outer ring (1), and an annular groove (13) being provided between the outer ring (1) and the inner ring (2); An annular clamp (4), wherein two annular clamps (4) are provided, the two annular clamps (4) are parallel to the gap between the outer ring (1) and the inner ring (2), a plurality of balls (5) roll between the two annular clamps (4), and the plurality of balls (5) are located in the annular groove (13); A sealing ring (3), wherein two sealing rings (3) are provided, and the two sealing rings (3) are provided between the outer ring (1) and the inner ring (2); and An elastic mechanism is arranged between the gap between the outer ring (1) and the inner ring (2), and the elastic mechanism is connected to the two sealing rings (3) to limit the position of the two sealing rings (3).

2. The ultra-low temperature deep groove ball bearing according to claim 1, characterized in that: The elastic mechanism comprises a telescopic component and a snap-on component. The telescopic component is arranged in the gap between the outer ring (1) and the inner ring (2). The telescopic component is connected to two sealing rings (3). The snap-on component is arranged between the outer ring (1) and the inner ring (2). The snap-on component is connected to the sealing ring (3).

3. The ultra-low temperature deep groove ball bearing according to claim 2, characterized in that: The telescopic assembly comprises a fixing sleeve (6), a telescopic rod (7) and a spring (8). The fixing sleeve (6) is provided in plurality, and the fixing sleeves (6) are fixedly connected between the two annular clamps (4), and the two ends of the fixing sleeves (6) extend to the side ends of the two annular clamps (4). The telescopic rod (7) is provided in plurality, and the telescopic rod (7) is inserted into the fixing sleeves (6). The telescopic rod (7) is connected to the two sealing rings (3). The spring (8) is provided in plurality, and the spring (8) is sleeved on the circumferential surface of the telescopic rod (7). The spring (8) is located in the fixing sleeves (6).

4. The ultra-low temperature deep groove ball bearing according to claim 3, characterized in that: The clamping assembly comprises a plurality of annular bevel grooves (9), the plurality of annular bevel grooves (9) being arranged on the inner wall of the gap between the outer ring (1) and the inner ring (2), and the plurality of annular bevel grooves (9) corresponding to the two sealing rings (3), and the truncation of the plurality of annular bevel grooves (9) presents an angle of 45 degrees.

5. The ultra-low temperature deep groove ball bearing according to claim 4, characterized in that: The cross-sections of the two sealing rings (3) are in an "M" shape, and the inner and outer annular surfaces of the two sealing rings (3) are inserted into two annular bevel grooves (9).

6. The ultra-low temperature deep groove ball bearing according to claim 5, characterized in that: The outer end surfaces of the two sealing rings (3) are each provided with a plurality of oil injection holes (12).

7. The ultra-low temperature deep groove ball bearing according to claim 6, characterized in that: A plurality of slots (11) are provided between the circumferential inner walls of the inner ring (2).

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