Automatic inclinator bearing

Abstract

The utility model provides an automatic inclinator bearing, which comprises an outer ring, an inner ring and a plurality of rollers, a raceway for filling the plurality of rollers is formed between the outer ring and the inner ring, sealing rings are arranged on two sides of the raceway, the inner ring comprises an annular groove which is far away from the end part of the raceway, and the inner ring is provided with an annular groove which is far away from the end part of the raceway. The annular groove comprises a first abutting edge extending in the radial direction, the outer edge of the sealing ring is embedded in the outer ring, the sealing ring comprises a first sealing lip and a vent hole, the first sealing lip is arranged at the position, close to the inner edge, of the sealing ring and is in axial clearance fit with the first abutting edge, and the vent hole is communicated with the first sealing lip. And the vent hole is formed in the sealing ring close to the outer edge. Aiming at the defects in the prior art, the utility model provides the automatic inclinator bearing which can better adapt to the working condition that internal components in the automatic inclinator are easy to deflect relative to an outer ring and is more stable in sealing effect.

Description

Technical Field

[0001] The utility model relates to an automatic tilting device bearing. Background Art

[0002] Bearings are important components used for rotating support of mechanical bodies. They are widely used in various fields of people's lives and work. In order to adapt to their respective fields, they are often adjusted for applicability. Among them, the bearings used for helicopter automatic tilters are double-row angular contact ball bearings with seals. Since the helicopter automatic tilter has a tilting moment with frequent changes in size and direction, during the operation of the bearing, the rotating inner ring, roller and retainer of the bearing will be skewed relative to the outer ring due to a certain coaxiality error between the inner and outer rings and the actual required self-aligning angle of the bearing. The pull-out force of the seal is required to be large. Due to the installation requirements of the automatic tilter bearing, the thickness of the inner and outer rings is relatively thin, and the skeleton of the seal is required to be relatively short. According to conventional designs, it is impossible for the seal and the outer ring to achieve a sealing structure with sufficient pull-out force and meeting the size requirements. The inner ring sealing bevel is a bevel. If the lubricating oil flows into the sealing bevel too much, the increase in the interference between the inner ring and the seal will cause the friction torque of the bearing to increase and the inner ring and the seal to wear seriously. If the interference is not enough, the lubricating oil is easy to leak. For this reason, the bearing needs to be improved. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides an automatic recliner bearing which can better adapt to the working condition that the internal components of the automatic recliner are easily deflected relative to the outer ring and has a more stable sealing effect.

[0004] To achieve the above-mentioned purpose, the utility model provides an automatic tilt device bearing, including an outer ring, an inner ring and a plurality of rollers, a raceway for filling the plurality of rollers is formed between the outer ring and the inner ring, sealing rings are arranged on both sides of the raceway, the inner ring includes an annular groove located at the end away from the raceway, the annular groove includes a first abutting edge extending radially, the outer edge of the sealing ring is embedded in the outer ring, and the sealing ring includes a first sealing lip and a vent hole, the first sealing lip is arranged near the inner edge of the sealing ring and cooperates with the axial clearance between the first abutting edge, and the vent hole is arranged near the outer edge of the sealing ring.

[0005] The advantages of adopting the above technical solution are: an annular groove with a radially extending first abutting edge is provided on the inner ring, and a first sealing lip and a vent hole are provided on the sealing ring at both sides of the raceway, so that the axial clearance of the first sealing lip and the first abutting edge is matched, so that under normal conditions, the first sealing lip and the first abutting edge of the bearing do not contact each other, and when the bearing is tilted during operation, the first sealing lip and the first abutting edge produce a certain interference abutment to ensure the sealing effect, and on this basis, vent holes are further provided at the portion of the sealing ring close to the outer edge, and because the outer edge of the sealing ring is to be embedded in the outer ring, under normal conditions, these vent holes can be closed due to elastic deformation, and when the internal pressure of the bearing is relatively high during operation, these vent holes can be opened under pressure to exhaust air, thereby ensuring the balance of internal and external pressures of the bearing, avoiding the occurrence of oil leakage, sealing failure, etc. due to the outward turning of the sealing lip portion of the sealing ring, and better adapting to the working conditions of the automatic tilt mechanism with deflection and relatively high internal pressure during operation.

[0006] The utility model can be further configured as follows: the first abutting edge is configured to extend obliquely toward the sealing ring.

[0007] Through further configuration, the first abutting edge is configured to extend obliquely toward the sealing ring, so that the first abutting edge has a certain inclination angle, ensuring that when the inner ring of the bearing overturns significantly, the first abutting edge and the sealing member fit better to ensure the sealing effect.

[0008] The utility model can be further configured as follows: the sealing ring includes a second sealing lip, the annular groove includes a second abutting edge extending axially, and the second sealing lip is in interference abutment fit with the second abutting edge.

[0009] Through further configuration, a second sealing lip is provided in the sealing ring, and the second sealing lip and the second abutting edge of the annular groove are in interference fit, thereby ensuring the sealing effect of the bearing under normal conditions. When the bearing is deflected and the interference fit between the second sealing lip and the second abutting edge is insufficient, the first sealing lip and the first abutting edge are in abutment with each other, thereby ensuring the sealing effect.

[0010] The utility model can be further configured as follows: the sealing ring includes a frame and a bending portion, the bending portion is arranged below the frame, and the bending portion extends obliquely toward the first abutting edge, the first sealing lip is arranged below the bending portion and extends radially, and the second sealing lip is arranged below the first sealing lip and extends obliquely toward a direction away from the first abutting edge.

[0011] Through further configuration, a bent portion extending obliquely toward the first abutting edge is provided below the sealing ring skeleton, and the first sealing lip is provided below the bent portion to form a fit between the first sealing lip and the axial clearance of the first abutting edge. Then, the second sealing lip is provided below the first sealing lip and extends obliquely toward a direction away from the first abutting edge. On the basis of interference fit between the second sealing lip and the second abutting edge, the cross-section of the inner edge of the sealing ring presents a U-shaped bend to make it have better elasticity.

[0012] The utility model can be further configured as follows: the outer ring includes a mounting groove for the sealing ring to be clamped, and the vent hole is extended and arranged to fit the inner wall of the mounting groove.

[0013] Through further configuration, the vent hole is extended to fit the inner wall of the installation groove, and the vent hole can be formed by grooving the outer edge of the sealing ring, which facilitates the configuration of the vent hole.

[0014] The utility model can be further configured as follows: a pressure relief groove is formed by bending at the outer edge of the sealing ring.

[0015] Through further configuration, a pressure relief groove is formed by bending the outer edge of the sealing ring, thereby improving the deformation capacity of the outer edge of the sealing ring during installation, thereby facilitating the installation of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Figure 2 For the utility model embodiment Figure 1 Enlarged view of part a;

[0018] Figure 3 For the utility model embodiment Figure 1 Enlarged view of part b;

[0019] Figure 4 This is a schematic diagram of the cooperation between the inner ring and the sealing ring in the inclined state of an embodiment of the utility model;

[0020] Among them: outer ring 1; mounting groove 11; inner ring 2; annular groove 21; first abutting edge 22; second abutting edge 23; sealing ring 3; first sealing lip 31; vent hole 32; second sealing lip 33; frame 34; bending part 35; pressure relief groove 36. DETAILED DESCRIPTION

[0021] The utility model is an embodiment of an automatic tilt device bearing Figure 1-4As shown: it includes an outer ring 1, an inner ring 2 and a plurality of rollers, a raceway for filling the plurality of rollers is formed between the outer ring 1 and the inner ring 2, sealing rings 3 are arranged on both sides of the raceway, the inner ring 2 includes an annular groove 21 located at the end away from the raceway, the annular groove 21 includes a radially extending first abutting edge 22, the outer edge of the sealing ring 3 is embedded in the outer ring 1, and the sealing ring 3 includes a first sealing lip 31 and a vent hole 32, the first sealing lip 31 is arranged near the inner edge of the sealing ring 3 and cooperates with the axial clearance between the first abutting edge 22, and the vent hole 32 is arranged near the outer edge of the sealing ring 3.

[0022] The first abutting edge is arranged to extend obliquely toward the sealing ring.

[0023] The sealing ring 3 includes a second sealing lip 33 , and the annular groove 21 includes an axially extending second abutting edge 23 . The second sealing lip 33 is in interference abutment fit with the second abutting edge 23 .

[0024] The sealing ring 3 includes a skeleton 34 and a bending portion 35. The bending portion 35 is arranged below the skeleton 34 and extends obliquely toward the first abutting edge 22. The first sealing lip 31 is arranged below the bending portion 35 and extends radially. The second sealing lip 33 is arranged below the first sealing lip 31 and extends obliquely toward the direction away from the first abutting edge 22.

[0025] The outer ring 1 includes a mounting groove 11 for the sealing ring 3 to be clamped, and the vent hole 32 is extended and arranged to fit the inner wall of the mounting groove 11 .

[0026] The outer edge of the sealing ring 3 is bent to form a pressure relief groove 36 .

[0027] The above example is only one preferred specific example of the present invention. The common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. An automatic tilt bearing, comprising an outer ring, an inner ring and a plurality of rollers, wherein a raceway for the plurality of rollers to be filled is formed between the outer ring and the inner ring, and characterized in that: Sealing rings are arranged on both sides of the raceway, the inner ring includes an annular groove located at the end away from the raceway, the annular groove includes a first abutting edge extending radially, the outer edge of the sealing ring is embedded in the outer ring, and the sealing ring includes a first sealing lip and a vent hole, the first sealing lip is arranged near the inner edge of the sealing ring and cooperates with the axial clearance between the first abutting edge, and the vent hole is arranged near the outer edge of the sealing ring.

2. The automatic tilt device bearing according to claim 1, characterized in that: The first abutting edge is arranged to extend obliquely toward the sealing ring.

3. The automatic tilt device bearing according to claim 1 or 2, characterized in that: The sealing ring comprises a second sealing lip, the annular groove comprises a second abutting edge extending axially, and the second sealing lip and the second abutting edge are in interference abutment fit.

4. The automatic tilt device bearing according to claim 3, characterized in that: The sealing ring includes a frame and a bending portion, wherein the bending portion is arranged below the frame and extends obliquely toward the first abutting edge, the first sealing lip is arranged below the bending portion and extends radially, and the second sealing lip is arranged below the first sealing lip and extends obliquely toward a direction away from the first abutting edge.

5. The automatic tilt device bearing according to claim 1 or 2, characterized in that: The outer ring comprises a mounting groove for the sealing ring to be clamped, and the vent hole is extended and arranged to fit the inner wall of the mounting groove.

6. The automatic tilt device bearing according to claim 1 or 2, characterized in that: The outer edge of the sealing ring is bent to form a pressure relief groove.

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