CN219471847U

CN219471847U - Rotary shaft supporting structure

Info

Publication number: CN219471847U
Application number: CN202223528653.6U
Authority: CN
Inventors: 王哲; 高玉伟; 石钜; 许瑞阳
Original assignee: AVIC First Aircraft Institute
Current assignee: AVIC First Aircraft Institute
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-08-04
Anticipated expiration: 2032-12-27

Abstract

The application belongs to aviation technical field, in particular to a rotation axis bearing structure includes: the rotating shaft comprises a large section and a small section positioned at the tail end, the diameter of the large section is larger than that of the small section, and a step surface is arranged at the joint of the small section and the large section; the support piece is provided with a round groove for inserting the rotating shaft, and a tapered roller bearing is arranged in the round groove; the small section is inserted into the inner ring of the tapered roller bearing, the step surface is clamped on the side surface of the inner ring of the tapered roller bearing, and for structures such as a cabin door, a rotating radome, a rudder, an optoelectronic turret and the like which are frequently rotated by an airplane, the rotating shaft supporting structure is combined with the tapered roller by virtue of the rolling bearing, so that the radial and axial directions of the rotating shaft and the overturning load are effectively transmitted, and the rotating is flexible.

Description

Rotary shaft supporting structure

Technical Field

The application belongs to aviation technical field, in particular to a rotation axis bearing structure.

Background

The aircraft boarding door has large weight and large sinking amount when working for a long time, and the normal opening of the door is influenced. The traditional method has the advantages that the bearing is arranged on the rotating shaft to rotate and bear axial load, the bearing is easy to crack, and the cost is high.

Disclosure of Invention

In order to solve the above-mentioned problem, the present application provides a rotation shaft support structure, including:

the rotating shaft comprises a large section and a small section positioned at the tail end, the diameter of the large section is larger than that of the small section, and a step surface is arranged at the joint of the small section and the large section;

the support piece is provided with a round groove for inserting the rotating shaft, and a tapered roller bearing is arranged in the round groove;

the small section is inserted into the inner ring of the tapered roller bearing, and the step surface is clamped on the side surface of the inner ring of the tapered roller bearing.

Preferably, the support comprises an upper support and a lower support; the upper support piece and the lower support piece are provided with a preset distance, and the upper support piece is provided with a through hole for the rotating shaft to pass through.

Preferably, a bearing is disposed in the through hole.

Preferably, the retainer rings are sleeved on the two sides of the bearing of the rotating shaft.

Preferably, the lower end of the lower support member is further provided with a bearing seat reinforcement, and the bearing seat reinforcement is connected with the lower support member through a bolt.

Preferably, the bottom of the lower support member is a flat plate, the edge of the flat plate is provided with a reinforcing flange, the end face of the flat plate is provided with a bulge to form a mounting seat, and the center of the mounting seat is provided with the groove.

Preferably, the mounting base is connected to the reinforcing flange by a plurality of reinforcing ribs.

Preferably, the mounting is provided on the stiffening flange.

Preferably, the tapered roller bearing is a double row tapered roller bearing.

Preferably, a bearing seal is provided between the step surface and the tapered roller bearing.

The advantages of the present application include: for structures such as cabin doors, rotating radomes, rudders, photoelectric turrets and the like which are frequently rotated by an airplane, the rotating shaft supporting structure is combined with tapered rollers by virtue of rolling bearings, so that radial and axial and overturning loads of the rotating shaft are effectively transmitted, and the rotating shaft is flexible to rotate.

Drawings

FIG. 1 is a schematic view of a rotary shaft support structure according to the present utility model.

Detailed Description

For the purposes, technical solutions and advantages of the present application, the following describes the technical solutions in the embodiments of the present application in more detail with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without undue burden are within the scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

The rotating shaft is required to drive the rotating structure, the self weight of the structure is required to be borne, the pneumatic load is required to be borne, the radial load and the rotation are borne through the upper rolling bearing, the radial load can be borne by the lower tapered roller, the axial load can be borne, and the bearing rotation friction is small and flexible. The rotating shaft is designed into a step shape, and the step is intentionally designed at the bearing position so as to clamp the bearing inner ring. The support piece is designed to be convenient for large bearing assembly, the support piece is provided with an oil injection hole which is convenient for oil injection, and the support piece is also provided with enough strength and rigidity and can be used for carrying, and is connected to the machine body structure through bolts. The bearing, the retainer ring and the bolt select standard components, the structure of which is shown in figure 1, comprise: the rotating shaft 1 can be connected with a cabin door and the like, the axis of the rotating shaft can be vertical or horizontal, the rotating shaft 1 comprises a large section and a small section positioned at the tail end, the diameter of the large section is larger than that of the small section, and a step surface is arranged at the joint of the small section and the large section;

the support piece is fixed on the machine body and is provided with a round groove for inserting the rotating shaft 1, and a tapered roller bearing 3 is arranged in the round groove;

the small section is inserted into the inner ring of the tapered roller bearing 3, and the step surface is clamped on the side surface of the inner ring of the tapered roller bearing 3.

In some alternative embodiments, the support comprises an upper support 9 and a lower support 4; the upper support 9 and the lower support 4 have a predetermined distance therebetween, and the upper support 9 has a through hole through which the rotation shaft 1 passes.

In some alternative embodiments, a bearing 8 is provided in the through hole.

In some alternative embodiments, the shaft 1 is sleeved with a retainer ring 2 at both sides of the bearing 8.

In some alternative embodiments, the lower end of the lower support 4 also has a bearing seat reinforcement 5, the bearing seat reinforcement 5 being connected to the lower support 4 by bolts 6.

In some alternative embodiments, the bottom of the lower support 4 is a flat plate, the edge of the flat plate is provided with a reinforcing flange, the end surface of the flat plate is provided with a protrusion to form a mounting seat, and the center of the mounting seat is provided with the groove.

In some alternative embodiments, the mounting base is connected to the reinforcing flange by a plurality of reinforcing ribs.

In some alternative embodiments, the mount is disposed on the stiffening flange.

In some alternative embodiments, the tapered roller bearing 3 is a double row tapered roller bearing.

In some alternative embodiments, a bearing seal 7 is provided between the step surface and the tapered roller bearing 3.

The step department at pivot 1 sets up the bearing, the bearing axial location of being convenient for of this application. 2. The rolling bearing and the tapered roller are combined, double fulcrums are utilized, and axial and radial loads can be conveniently borne by the rolling bearing and the tapered roller. 3. The bearing seat 5 is not only a bearing support, but also a machine body structure reinforcement, and is convenient for assembling the bearing.

The advantages of the present application include: for structures such as cabin doors, rotating radomes, rudders, photoelectric turrets and the like, in which the rotating shaft supporting structure is combined with tapered rollers by means of rolling bearings, the rotating shaft is effectively transmitted to radial and axial directions and overturning loads, and the rotating is flexible, but the protection scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A rotating shaft support structure, comprising:

the rotating shaft (1), the rotating shaft (1) comprises a large section and a small section positioned at the tail end, the diameter of the large section is larger than that of the small section, and a step surface is arranged at the joint of the small section and the large section;

the support piece is provided with a round groove for inserting the rotating shaft (1), and a tapered roller bearing (3) is arranged in the round groove;

the small section is inserted into the inner ring of the tapered roller bearing (3), and the step surface is clamped on the side surface of the inner ring of the tapered roller bearing (3).

2. The rotating shaft support structure according to claim 1, characterized in that the support comprises an upper support (9) and a lower support (4); the upper support piece (9) and the lower support piece (4) are provided with a preset distance, and the upper support piece (9) is provided with a through hole for the rotating shaft (1) to pass through.

3. A rotating shaft support structure according to claim 2, characterized in that a bearing (8) is provided in the through hole.

4. A rotating shaft support structure according to claim 3, characterized in that the shaft (1) is provided with collars (2) at both sides of the bearing (8).

5. The rotating shaft support structure according to claim 1, characterized in that the lower end of the lower support member (4) is further provided with a bearing housing reinforcement (5), the bearing housing reinforcement (5) being connected to the lower support member (4) by means of bolts (6).

6. The rotating shaft support structure according to claim 2, characterized in that the bottom of the lower support (4) is a flat plate, the edge of which has a reinforcing flange, the end face of which has a projection forming a mounting seat, the centre of which has a recess.

7. The rotating shaft support structure of claim 6, wherein the mount is connected to the reinforcing flange by a plurality of reinforcing ribs.

8. The rotating shaft support structure of claim 7, wherein the mount is disposed on the stiffening flange.

9. A rotating shaft support structure according to claim 1, characterized in that the tapered roller bearing (3) is a double row tapered roller bearing.

10. A rotating shaft support structure according to claim 1, characterized in that a bearing seal ring (7) is provided between the step surface and the tapered roller bearing (3).