Novel rotary table bearing with bearing shaft, radial force, high rotating speed and high precision

Abstract

The utility model discloses a novel rotary table bearing with a bearing shaft, high radial force, high rotating speed and high precision. A first row of axial rollers are mounted in a first row of axial retainers, and first row of axial retainer outer check rings are mounted outside the first row of axial retainers and the first row of axial rollers; the radial retainer is sleeved on the first shaft washer, and a radial roller is mounted in the radial retainer; an outer ring raceway ceramic ring is embedded in the outer ring; the first shaft washer is sleeved with an axial retainer check ring, the axial retainer check ring is sleeved with a second-row axial retainer, a second-row axial roller is installed in the second-row axial retainer, and a second-row axial retainer outer check ring is installed outside the second-row axial retainer and the second-row axial roller; a second shaft washer axial raceway ceramic ring is sleeved on the second shaft washer; and the first shaft ring is connected with the second shaft ring. Friction between the rolling body and the raceway is reduced, the actual number of revolutions is increased, the service life is prolonged, and use of a high-precision end machine tool is better met.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing manufacturing, in particular to a new type of turntable bearing with a load-bearing shaft, high radial force, high speed and high precision. Background Art

[0002] The shaft-radial combined bearing used in high-precision, high-speed turntables has a shaft ring, an outer ring, a separate shaft ring, three rows of rolling elements, and three sets of cages. The bearing must have high shaft, radial load and overturning force, and the rolling element is a cylindrical roller. Due to structural limitations and other factors, the maximum speed in actual work can reach 50% of the design speed, which cannot meet the high-precision and higher speed requirements of current five-axis machine tools. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a new type of turntable bearing with a load-bearing shaft, high radial force, high speed and high precision, which prevents the temperature rise and fatigue of the rolling element and the groove surface, thereby solving the shortcomings of the original turntable bearing such as low speed and short life.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a new type of turntable bearing with a load-bearing shaft, high radial force, high speed and high precision, including a first shaft ring, on which the first shaft ring axial raceway ceramic ring and the first row of axial retaining frames are installed in sequence, the first row of axial rollers are installed in the first row of axial retaining frames, and the first row of axial retaining frame outer retaining rings are installed outside the first row of axial retaining frames and the first row of axial rollers; the radial retaining frame is sleeved on the first shaft ring, and radial rollers are installed in the radial retaining frame; the outer ring is inlaid with an outer ring raceway ceramic ring, and the outer ring and the outer ring raceway ceramic ring are sleeved between the first row of axial rollers and the radial rollers; the axial retaining frame retaining ring is sleeved on the first shaft ring, and the second row of axial retaining frames is sleeved outside the axial retaining frame retaining ring, the second row of axial rollers are installed in the second row of axial retaining frames, and the second row of axial retaining frame outer retaining rings are installed outside the second row of axial rollers; the second shaft ring is sleeved with the second shaft ring axial raceway ceramic ring; the first shaft ring is connected to the second shaft ring.

[0005] Furthermore, a first row of axial cage outer retaining rings are installed outside the first row of axial cages and the first row of axial rollers through first row of axial cage connecting pins.

[0006] Furthermore, the thickness of the outer ring raceway ceramic ring is smaller than the thickness of the outer ring, and radial ribs are formed between the two end surfaces of the outer ring raceway ceramic ring and the two end surfaces of the outer ring, and the radial ribs are inclined.

[0007] Furthermore, a second row of axial retainer outer rings are installed outside the second row of axial retainers and the second row of axial rollers via second row of axial retainer connecting pins.

[0008] Furthermore, the first shaft ring is connected to the second shaft ring via connecting bolts.

[0009] Furthermore, the second shaft ring axial raceway ceramic ring is located below the second row of axial retaining frames.

[0010] Furthermore, one end of the first row of axial rollers and the second row of axial rollers is an arc surface, and the other end is a plane.

[0011] Furthermore, both ends of the radial roller are flat.

[0012] Furthermore, the radial rollers, the first row of axial rollers, and the second row of axial rollers are made of silicon carbide, and the surface hardness is HRC75-82.

[0013] Furthermore, the outer ring raceway ceramic ring, the first shaft ring axial raceway ceramic ring, and the second shaft ring axial raceway ceramic ring are made of silicon carbide, and the surface hardness is HRC75-82.

[0014] The utility model reduces the friction between the rolling body and the raceway, improves the actual number of revolutions, increases the service life, and better meets the use of high-precision machine tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the first shaft ring of the utility model;

[0017] Figure 3 It is a schematic diagram of the outer ring of the utility model;

[0018] Figure 4 It is a schematic diagram of the second shaft ring of the utility model;

[0019] Figure 5 It is a schematic diagram of the axial roller of the utility model;

[0020] Figure 6 It is a schematic diagram of the radial roller of the utility model;

[0021] Figure 7 It is a schematic diagram of the axial retainer of the utility model.

[0022] Among them: 1. Outer ring; 2. Ceramic ring of outer ring raceway; 3. First row of axial retainer; 5. Ceramic ring of axial raceway of first shaft ring; 6. First shaft ring; 7. Connecting bolts; 8. Second row of axial retainer; 9. Ceramic ring of axial raceway of second shaft ring; 10. Second shaft ring; 11. Radial retainer; 13. Radial roller; 14. First row of axial rollers; 15. Axial retainer retainer ring; 16. Second row of axial rollers; 17. Outer retainer ring of first row of axial retainer; 18. Outer retainer ring of second row of axial retainer; 19. Connecting pins of first row of axial retainer; 20. Connecting pins of second row of axial retainer. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-7 The specific implementation methods of the utility model are further described.

[0024] The new type of turntable bearing with high load-bearing shaft, radial force, high speed and high precision comprises a first shaft ring 6, on which are sequentially mounted a first shaft ring axial raceway ceramic ring 5 and a first row of axial retaining frames 3, in which a first row of axial rollers 14 are installed, and a first row of axial retaining frame outer retaining rings 17 are installed outside the first row of axial retaining frames 3 and the first row of axial rollers 14 through first row of axial retaining frame connecting pins 19; a radial retaining frame 11 is mounted on the first shaft ring 6, in which radial rollers 13 are installed; an outer ring raceway ceramic ring 2 is inlaid in the outer ring 1, the thickness of the outer ring raceway ceramic ring 2 is less than the thickness of the outer ring 1, and radial surfaces of the outer ring raceway ceramic ring 2 and the two end surfaces of the outer ring 1 form radial surfaces. The ribs and radial ribs are tilted, the outer ring 1 and the outer ring raceway ceramic ring 2 are sleeved between the first row of axial rollers 14 and radial rollers 13; the axial retainer retainer ring 15 is sleeved on the first shaft ring 6, the second row of axial retainers 8 are sleeved outside the axial retainer retainer ring 15, the second row of axial rollers 16 are installed inside the second row of axial retainers 8, and the second row of axial retainers 8 and the second row of axial rollers 16 are installed with the second row of axial retainer outer retainer ring 18 through the second row of axial retainer connecting pins 20; the second shaft ring 10 is sleeved with the second shaft ring axial raceway ceramic ring 9, and the second shaft ring axial raceway ceramic ring 9 is located below the second row of axial retainers 8; the first shaft ring 6 and the second shaft ring 10 are connected by connecting bolts 7. One end of the first row of axial rollers 14 and the second row of axial rollers 16 is an arc surface, and the other end is a plane, and both ends of the radial roller 13 are planes. The radial roller 13, the first row of axial rollers 14, and the second row of axial rollers 16 are made of silicon carbide with a surface hardness of HRC75-82. The outer ring raceway ceramic ring 2, the first shaft ring axial raceway ceramic ring 5, and the second shaft ring axial raceway ceramic ring 9 are made of silicon carbide with a surface hardness of HRC75-82.

[0025] The roller is made of silicon carbide, and the raceway surface where the roller contacts is inlaid with ceramic rings. This increases the original steel surface hardness from HRC58-62 to HRC75-82, greatly improving the surface wear resistance. Silicon carbide is lighter and more wear-resistant than steel, has a lower friction coefficient, and a lower temperature rise.

[0026] At the same time, the axial raceway of the outer ring 1 is treated with radial ribs and axial roller end faces to prevent the axial roller from radial displacement due to centrifugal force at high speeds. The arc of the axial roller end face is in full contact with the radial rib of the outer ring 1 with an inclined angle to prevent a reduction in speed and surface damage due to poor contact.

[0027] Due to structural reasons, a part of the axial cage contains too few axial rollers, so the protruding part is designed to increase the strength of the axial cage and contain more rollers, so that the axial rollers are not easy to tilt. The outer retaining ring of the axial cage is used to increase the strength of the axial cage.

[0028] The radial boring process is also carried out on the main body of the axial cage to prevent the axial roller from tilting. After the axial roller is installed into the axial cage pocket, the axial cage outer retaining ring is placed on it and fixed with pins to form a whole. This not only prevents the axial roller from falling off, but also increases the overall strength of the axial cage and makes the axial cage less likely to deform.

[0029] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, according to the technical scheme and utility model concept of the utility model, shall be covered by the protection scope of the utility model.

Claims

1. A new type of turntable bearing with high speed and high precision and bearing shaft, radial force, characterized by: The invention comprises a first shaft ring (6), on which a first shaft ring axial raceway ceramic ring (5) and a first row of axial retaining frames (3) are sequentially mounted, a first row of axial rollers (14) are mounted inside the first row of axial retaining frames (3), and a first row of axial retaining frame outer retaining rings (17) are mounted outside the first row of axial retaining frames (3) and the first row of axial rollers (14); a radial retaining frame (11) is sleeved on the first shaft ring (6), and radial rollers (13) are mounted inside the radial retaining frame (11); an outer ring raceway ceramic ring (2) is inlaid inside the outer ring (1), and the outer ring (1) and the outer ring raceway ceramic ring (2) are ...). The ring (2) is sleeved between the first row of axial rollers (14) and the radial rollers (13); the axial retainer retaining ring (15) is sleeved on the first shaft ring (6); the second row of axial retainers (8) are sleeved outside the axial retainer retaining ring (15); the second row of axial rollers (16) are installed inside the second row of axial retainers (8); the second row of axial retainers (8) and the second row of axial rollers (16) are installed outside the second row of axial retainers (8); the second shaft ring axial raceway ceramic ring (9) is sleeved on the second shaft ring (10); the first shaft ring (6) is connected to the second shaft ring (10).

2. The new type of turntable bearing with load-bearing shaft, radial force, high speed and high precision according to claim 1 is characterized in that: A first row of axial retainer outer rings (17) are installed outside the first row of axial retainer (3) and the first row of axial rollers (14) via first row of axial retainer connecting pins (19).

3. The new type of turntable bearing with load-bearing shaft, radial force, high speed and high precision according to claim 1 is characterized in that: The thickness of the outer ring raceway ceramic ring (2) is smaller than the thickness of the outer ring (1), and radial ribs are formed between the two end surfaces of the outer ring raceway ceramic ring (2) and the two end surfaces of the outer ring (1), and the radial ribs are arranged obliquely.

4. The new type of turntable bearing with load-bearing shaft, radial force, high speed and high precision according to claim 1 is characterized in that: A second row of axial retainer outer rings (18) are mounted outside the second row of axial retainer (8) and the second row of axial rollers (16) via second row of axial retainer connecting pins (20).

5. The new type of turntable bearing with load-bearing shaft, radial force, high speed and high precision according to claim 1 is characterized in that: The first shaft ring (6) and the second shaft ring (10) are connected via connecting bolts (7).

6. The new type of turntable bearing with load-bearing shaft, radial force, high speed and high precision according to claim 1 is characterized in that: The second shaft ring axial raceway ceramic ring (9) is located below the second row of axial retaining frames (8).

7. The new type of turntable bearing with load-bearing shaft, radial force, high speed and high precision according to claim 1 is characterized in that: One end of the first row of axial rollers (14) and the second row of axial rollers (16) is an arc surface, and the other end is a plane.

8. The new type of turntable bearing with load-bearing shaft, radial force, high speed and high precision according to claim 1 is characterized in that: Both ends of the radial roller (13) are flat surfaces.

9. The new type of turntable bearing with load-bearing shaft, radial force, high speed and high precision according to claim 1, characterized in that: The radial rollers (13), the first row of axial rollers (14), and the second row of axial rollers (16) are made of silicon carbide, and have a surface hardness of HRC75-82.

10. The new type of turntable bearing with load-bearing shaft, radial force, high speed and high precision according to claim 1, characterized in that: The outer ring raceway ceramic ring (2), the first shaft ring axial raceway ceramic ring (5), and the second shaft ring axial raceway ceramic ring (9) are made of silicon carbide, and have a surface hardness of HRC75-82.

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