Sealing thrust tapered roller bearing

Abstract

The utility model discloses a sealed thrust tapered roller bearing and relates to the technical field of bearings. The utility model relates to a thrust tapered roller bearing, and aims to solve the problems that lubricating oil in the bearing leaks and mechanical components or environment outside the bearing are polluted due to poor sealing performance of the conventional thrust tapered roller bearing. The annular sealing groove is machined in the bottom of the inner ring of the shaft ring in the circumferential direction, the sealing ring is embedded in the annular sealing groove, the outer circle face of the shaft ring is matched and connected with the outer circle face of the seat ring through the protection cover, and the protection cover is used for generating certain pre-tightening force on the shaft ring and the seat ring, so that lubricating grease in the bearing can be prevented from overflowing from a shaft; and the protective cover can be stably mounted on the bearing to seal the outer diameter part of the bearing, so that the sealing performance of the thrust tapered roller bearing is greatly improved, and the phenomenon of polluting mechanical components or environment except the bearing is avoided. The thrust tapered roller bearing is suitable for the technical field of thrust tapered roller bearings.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a sealed thrust tapered roller bearing. Background Art

[0002] At present, there are many kinds of steering mechanisms for automobiles. A truck steering mechanism is mainly composed of thrust bearings, worms, rocker shafts and other components. The worm has a trapezoidal thread and is connected to the steering wheel through a thrust bearing. The finger-like conical finger pin is embedded in the spiral groove of the worm and supported on the crank by a bearing.

[0003] Thrust tapered roller bearings can only bear unidirectional axial loads and can limit the unidirectional axial displacement of the bearings, so they can be used for unidirectional axial positioning. Compared with thrust cylindrical roller bearings, they have greater load-bearing capacity and less relative sliding, but lower limiting speed. However, with the development of equipment, the requirements for bearings are getting higher and higher. In order to reduce the impact of external pollution on bearings, it is necessary to optimize the sealing of thrust tapered rollers.

[0004] In summary, the existing thrust tapered roller bearings have a problem of poor sealing, which causes the lubricating oil inside the bearing to leak and pollute mechanical components or the environment outside the bearing. Utility Model Content

[0005] The utility model provides a sealed thrust tapered roller bearing to solve the problem that the existing thrust tapered roller bearing has poor sealing performance, which causes lubricating oil leakage inside the bearing and pollutes mechanical components or the environment outside the bearing.

[0006] The utility model discloses a sealed thrust tapered roller bearing, which comprises a seat ring 1, a shaft ring 2, a protective cover 3, a roller 4 and a sealing ring 5;

[0007] The upper surface of the shaft ring 2 is processed with a tapered annular groove along the circumferential direction, and a plurality of rollers 4 are evenly arranged inside the tapered annular groove. A seat ring 1 is arranged directly above the shaft ring 2, and the outer cylindrical surface of the shaft ring 2 is connected to the outer cylindrical surface of the seat ring 1 through a protective cover 3. A positioning shield step is arranged on the lower surface of the shaft ring 2. The cross section of the protective cover 3 is U-shaped. The lower part of the protective cover 3 is sleeved on the shaft ring 2, and the bottom of the protective cover 3 is matched and connected with the positioning shield step on the lower surface of the shaft ring 2. A lock shield surface is processed at the edge of the upper surface of the seat ring 1, and the upper part of the protective cover 3 is sleeved on the seat ring 1. The top of the protective cover 3 is matched and contacted with the lock shield surface at the top of the seat ring 1. A sealing ring 5 is embedded at the bottom of the inner ring of the shaft ring 2.

[0008] Furthermore, the bottom of the inner ring of the shaft ring 2 is processed with an annular sealing groove along the circumferential direction;

[0009] Furthermore, a sealing ring 5 is embedded inside the annular sealing groove;

[0010] Furthermore, the angle ɑ between the locking shield surface of the seat ring 1 and the vertical horizontal line is 45°;

[0011] Furthermore, the thickness L1 of the locking shield surface of the seat ring 1 is 3 mm;

[0012] Furthermore, the distance T between the top of the protective cover 3 and the upper surface of the seat ring 1 is 0.4 mm to 0.5 mm;

[0013] Furthermore, the thickness L6 of the positioning shield step on the shaft ring 2 is 1.5 mm;

[0014] Furthermore, the distance L5 between the outer circle edge of the positioning shield step and the outer circle edge of the shaft ring 2 is 4 mm;

[0015] Furthermore, a ring locking groove is processed on the top of the inner wall of the protective cover 3 along the circumferential direction, and the width L2 of the ring locking groove is 4.3 mm; the thickness L3 of the protective cover 3 is 1 mm, and the wall thickness L4 of the ring locking groove on the protective cover 3 is 0.8 mm;

[0016] Furthermore, the inner diameter A of the sealing ring 5 and the inner diameter B of the seat ring 1 have a single-sided interference of 0.15 mm; the inner diameter A of the sealing ring 5 and the inner diameter C of the shaft ring 2 have a single-sided interference of 0.05 mm;

[0017] Furthermore, the single-side clearance between the inner diameter E of the protective cover 3 and the outer diameter D of the seat ring 1 is 0.4 mm;

[0018] Furthermore, with the improvement of mechanical performance and environmental requirements, the performance of bearings must also be improved. Lubrication, as the fifth largest part of the bearing, plays a key role inside the bearing. Improving the bearing lubrication effect can increase the bearing life. Usually, the bearing seal forms a sealing effect with the inside of the bearing, and the thrust tapered roller bearing is an axial bearing. The sealing effect can only be formed by optimizing the bearing structure to cooperate with the shaft and housing.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model overcomes the shortcomings of the prior art, adopts an annular sealing groove processed along the circumferential direction on the bottom of the inner ring of the shaft ring, a sealing ring is embedded in the annular sealing groove, and the outer cylindrical surface of the shaft ring is connected with the outer cylindrical surface of the seat ring through a protective cover, and the protective cover is used to generate a certain pre-tightening force on the shaft ring and the seat ring, so as to prevent the grease inside the bearing from overflowing from the shaft, and the protective cover can be stably installed on the bearing to seal the outer diameter of the bearing, thereby greatly improving the sealing performance of the thrust tapered roller bearing and avoiding the pollution of mechanical components or the environment outside the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a main sectional view of a sealed thrust tapered roller bearing described in the utility model;

[0022] Figure 2 It is a main sectional view of a seat ring of a sealed thrust tapered roller bearing described in the utility model;

[0023] Figure 3 It is a main sectional view of a center shaft ring of a sealed thrust tapered roller bearing described in the utility model;

[0024] Figure 4 It is a main sectional view of a protective cover in a sealed thrust tapered roller bearing described in the utility model. DETAILED DESCRIPTION

[0025] Specific implementation method 1: Combination Figures 1 to 4 The sealed thrust tapered roller bearing described in this embodiment comprises a seat ring 1, a shaft ring 2, a protective cover 3, a roller 4 and a sealing ring 5;

[0026] The upper surface of the shaft ring 2 is processed with a tapered annular groove along the circumferential direction, and a plurality of rollers 4 are evenly arranged inside the tapered annular groove. A seat ring 1 is arranged directly above the shaft ring 2, and the outer cylindrical surface of the shaft ring 2 is connected to the outer cylindrical surface of the seat ring 1 through a protective cover 3. A positioning shield step is arranged on the lower surface of the shaft ring 2. The cross section of the protective cover 3 is U-shaped. The lower part of the protective cover 3 is sleeved on the shaft ring 2, and the bottom of the protective cover 3 is matched and connected with the positioning shield step on the lower surface of the shaft ring 2. A lock shield surface is processed at the edge of the upper surface of the seat ring 1, and the upper part of the protective cover 3 is sleeved on the seat ring 1. The top of the protective cover 3 is matched and contacted with the lock shield surface at the top of the seat ring 1. A sealing ring 5 is embedded at the bottom of the inner ring of the shaft ring 2.

[0027] In this specific implementation, an annular sealing groove is machined along the circumferential direction at the bottom of the inner ring of the shaft ring, a sealing ring is embedded in the annular sealing groove, and the outer cylindrical surface of the shaft ring is connected to the outer cylindrical surface of the seat ring through a protective cover. The protective cover is used to generate a certain pre-tightening force on the shaft ring and the seat ring, thereby preventing the internal grease of the bearing from overflowing from the shaft, and the protective cover can be stably installed on the bearing to seal the outer diameter of the bearing, thereby greatly improving the sealing performance of the thrust tapered roller bearing and avoiding the pollution of mechanical components or the environment other than the bearing.

[0028] Specific implementation method 2: Combination Figures 1 to 4 This embodiment is described as a further limitation of the thrust tapered roller bearing described in the first embodiment. In the sealed thrust tapered roller bearing described in this embodiment, an annular sealing groove is machined on the bottom of the inner ring of the shaft ring 2 along the circumferential direction.

[0029] Specific implementation method three: Combination Figures 1 to 4 This embodiment is described. This embodiment is a further limitation of the thrust tapered roller bearing described in the second embodiment. In the sealed thrust tapered roller bearing described in this embodiment, a sealing ring 5 is embedded in the annular sealing groove.

[0030] Specific implementation method four: Combination Figures 1 to 4 The present embodiment is described as a further limitation of the thrust tapered roller bearing described in the first embodiment. In the sealed thrust tapered roller bearing described in the present embodiment, the angle ɑ between the locking shield surface of the seat ring 1 and the vertical horizontal line is 45°.

[0031] Specific implementation method five: Combination Figures 1 to 4 The present embodiment is described as a further limitation of the thrust tapered roller bearing described in the fourth embodiment. In the sealed thrust tapered roller bearing described in the present embodiment, the thickness L1 of the locking shield surface on the seat ring 1 is 3 mm.

[0032] Specific implementation method six: Combination Figures 1 to 4 This embodiment is described as a further limitation of the thrust tapered roller bearing described in the fifth embodiment. In the sealed thrust tapered roller bearing described in this embodiment, the distance T between the top of the protective cover 3 and the upper surface of the seat ring 1 is 0.4 mm to 0.5 mm.

[0033] Specific implementation method seven: Combination Figures 1 to 4 Description of this embodiment: This embodiment is a further limitation of the thrust tapered roller bearing described in the specific embodiment 1. In the sealed thrust tapered roller bearing described in this embodiment, the thickness L6 of the positioning shield step on the shaft ring 2 is 1.5 mm; the distance L5 between the outer circle edge of the positioning shield step and the outer circle edge of the shaft ring 2 is 4 mm.

[0034] Specific implementation method eight: Combination Figures 1 to 4 The present embodiment is described as a further limitation of the thrust tapered roller bearing described in the first embodiment. The present embodiment describes a sealed thrust tapered roller bearing, wherein the top end of the inner wall of the protective cover 3 is processed with an annular locking groove along the circumferential direction, and the width L2 of the annular locking groove is 4.3 mm; the thickness L3 of the protective cover 3 is 1 mm, and the wall thickness L4 of the annular locking groove on the protective cover 3 is 0.8 mm.

[0035] Specific implementation method nine: Combination Figures 1 to 4The present embodiment is described as a further limitation of the thrust tapered roller bearing described in the first embodiment. In the sealed thrust tapered roller bearing described in the present embodiment, the inner diameter A of the sealing ring 5 and the inner diameter B of the seat ring 1 have a single-sided interference fit of 0.15 mm; the inner diameter A of the sealing ring 5 and the inner diameter C of the shaft ring 2 have a single-sided interference fit of 0.05 mm.

[0036] Specific implementation method ten: Combination Figures 1 to 4 The present embodiment is described as a further limitation of the thrust tapered roller bearing described in the first embodiment. In the sealed thrust tapered roller bearing described in the present embodiment, the single-side clearance between the inner diameter E of the protective cover 3 and the outer diameter D of the seat ring 1 is 0.4 mm.

Claims

1. A sealed thrust tapered roller bearing, characterized in that: It comprises a seat ring (1), a shaft ring (2), a protective cover (3), a roller (4) and a sealing ring (5); The upper surface of the shaft ring (2) is processed with a conical annular groove along the circumferential direction, and a plurality of rollers (4) are evenly arranged inside the conical annular groove. A seat ring (1) is arranged directly above the shaft ring (2), and the outer cylindrical surface of the shaft ring (2) is connected to the outer cylindrical surface of the seat ring (1) through a protective cover (3). A positioning shield step is arranged on the lower surface of the shaft ring (2). The cross section of the protective cover (3) is U-shaped. The lower part of the protective cover (3) is sleeved on the shaft ring (2), and the bottom of the protective cover (3) is matched and connected with the positioning shield step on the lower surface of the shaft ring (2). A lock shield surface is processed at the edge of the upper surface of the seat ring (1), and the upper part of the protective cover (3) is sleeved on the seat ring (1). The top of the protective cover (3) is matched and contacted with the lock shield surface at the top of the seat ring (1). A sealing ring (5) is embedded at the bottom of the inner ring of the shaft ring (2).

2. A sealed thrust tapered roller bearing according to claim 1, characterized in that: The bottom of the inner ring of the shaft ring (2) is machined with an annular sealing groove along the circumferential direction.

3. A sealed thrust tapered roller bearing according to claim 2, characterized in that: A sealing ring (5) is embedded inside the annular sealing groove.

4. A sealed thrust tapered roller bearing according to claim 1, characterized in that: The angle ɑ between the locking shield surface of the seat ring (1) and the vertical horizontal line is 45°.

5. A sealed thrust tapered roller bearing according to claim 4, characterized in that: The thickness L1 of the locking shield surface of the seat ring (1) is 3 mm.

6. A sealed thrust tapered roller bearing according to claim 5, characterized in that: The distance T between the top of the protective cover (3) and the upper surface of the seat ring (1) is 0.4 mm to 0.5 mm.

7. A sealed thrust tapered roller bearing according to claim 1, characterized in that: The thickness L6 of the positioning shield step on the shaft ring (2) is 1.5 mm; the distance L5 between the outer circle edge of the positioning shield step and the outer circle edge of the shaft ring (2) is 4 mm.

8. The sealed thrust tapered roller bearing according to claim 1, characterized in that: The top of the inner wall of the protective cover (3) is processed with a locking groove along the circumferential direction, and the width L2 of the locking groove is 4.3 mm; the thickness L3 of the protective cover (3) is 1 mm, and the wall thickness L4 of the locking groove on the protective cover (3) is 0.8 mm.

9. A sealed thrust tapered roller bearing according to claim 1, characterized in that: The unilateral interference between the inner diameter A of the sealing ring (5) and the inner diameter B of the seat ring (1) is 0.15 mm; the unilateral interference between the inner diameter A of the sealing ring (5) and the inner diameter C of the shaft ring (2) is 0.05 mm.

10. The sealed thrust tapered roller bearing according to claim 1, characterized in that: The single-side clearance between the inner diameter E of the protective cover (3) and the outer diameter D of the seat ring (1) is 0.4 mm.

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