CN219316727U

CN219316727U - Cabin door rotating shaft supporting structure

Info

Publication number: CN219316727U
Application number: CN202223510333.8U
Authority: CN
Inventors: 王哲; 范林; 成东圣; 王康宁
Original assignee: AVIC First Aircraft Institute
Current assignee: AVIC First Aircraft Institute
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-07-07
Anticipated expiration: 2032-12-27

Abstract

The application belongs to the technical field of aviation, and particularly relates to a cabin door rotating shaft supporting structure, which is positioned at a rotating shaft at the lower end of a cabin door, wherein the cabin door rotates by taking the rotating shaft as a center, the axis of the rotating shaft is vertical, and the end surface of the rotating shaft is provided with a first spherical recess; a support member assembled on the machine body, the support member having a groove into which the rotation shaft is inserted, the bottom of the groove having a second spherical recess; the first spherical recess and the second spherical recess are provided with steel balls, for a cabin door with a larger structural weight, the cabin door needs to be driven to rotate by the rotating shaft, the cabin door still bears the weight of the cabin door, especially works for a long time, the cabin door is sunken, the cabin door rotating shaft supporting structure depends on the gap between the bushing and the rotating shaft to rotate, the lower steel balls support the rotating shaft and can rotate, time and labor are saved, the cost is low, and the cabin door rotating shaft supporting structure can bear larger axial force.

Description

Cabin door rotating shaft supporting structure

Technical Field

The application belongs to the technical field of aviation, and in particular relates to a cabin door rotating shaft supporting 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 hatch door pivot bearing structure, include:

the rotating shaft is positioned at the lower end of the cabin door, the cabin door rotates around the rotating shaft, the axis of the rotating shaft is vertical, and the end face of the rotating shaft is provided with a first spherical recess;

a support member assembled on the machine body, the support member having a groove into which the rotation shaft is inserted, the bottom of the groove having a second spherical recess;

a steel ball is arranged between the first spherical recess and the second spherical recess.

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 first bushing is installed between the groove and the rotating shaft.

Preferably, a second bushing is installed between the through hole and the rotating shaft.

Preferably, the grooves are coated with grease.

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.

The advantages of the present application include: for a cabin door with a larger structural weight, the cabin door is driven to rotate by the rotating shaft, the weight of the cabin door is borne, particularly, under the condition of long-time working, the cabin door has a sinking phenomenon, the cabin door rotating shaft supporting structure rotates by the aid of a gap between the bushing and the rotating shaft, the lower steel ball supports the rotating shaft and can rotate, time and labor are saved, the cost is low, and the cabin door supporting structure can bear larger axial force.

Drawings

FIG. 1 is a schematic view of a door spindle support structure according to the present utility model;

FIG. 2 is a schematic view of a lower support;

FIG. 3 is a cross-sectional view A-A as shown in FIG. 2.

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 application provides a hatch door pivot bearing structure, as shown in fig. 1-3, includes:

the rotary shaft 1 is positioned at the lower end of the cabin door, the cabin door rotates around the rotary shaft, the axis of the rotary shaft is vertical, and the end face of the rotary shaft 1 is provided with a first spherical recess;

a support member assembled on the machine body, the support member having a groove into which the rotation shaft 1 is inserted, the bottom of the groove having a second spherical recess;

a steel ball 3 is arranged between the first spherical recess and the second spherical recess, and the steel ball 3 is positioned between the rotating shaft 1 and the supporting piece and is used for bearing all axial force of the rotating shaft 1.

Preferably, the support comprises an upper support 6 and a lower support 2; the upper support piece 6 and the lower support piece 2 are provided with preset distances, the upper support piece 6 is provided with a through hole for the rotating shaft 1 to pass through, and the upper support piece 6 is sleeved on the outer side of the rotating shaft 1 to provide lateral support for the rotating shaft 1; the lower end of the lower support 2 is provided with a reinforcement 4, the lower support 2 is connected with the machine body through the reinforcement 4, one mode of the upper support 6 and the lower support 2 is a connecting structure, namely, the upper support 6 is connected with the lower support 2 through a fastener, and the alternative mode is that the upper support 6 and the lower support 2 are respectively arranged on the machine body.

Preferably, a first bushing 7 is mounted between the recess and the spindle 1.

Preferably, a second bushing 5 is installed between the through hole and the rotating shaft 1.

Preferably, the grooves are coated with grease.

Preferably, the bottom of the lower support 2 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 bulge to form a mounting seat, and the center of the mounting seat is provided with the groove.

Preferably, the mounting is provided on the stiffening flange.

During machining and installation, the lower end of the machining rotating shaft 1 is provided with a first spherical recess matched with the steel ball 3.

The upper support 6 and the lower support 2 are machined, the upper support 6 presses the bush 5, and the lower support 2 presses the bush 7.

And (5) after the processing is finished, performing nondestructive inspection.

The steel ball 3 is placed in the first spherical recess of the lower support 2 in advance, grease is coated, the upper and lower supports are assembled on the machine body, and then the rotating shaft 1 is put on the support 6 from the top and falls onto the steel ball 3.

After the assembly is completed, lubricating oil is coated at the joint of the bushing and the rotating shaft, so that the rotating shaft is ensured to rotate flexibly and has no clamping stagnation.

The advantages of the present application include: for the cabin door with larger structural weight, the cabin door is driven to rotate by the rotating shaft, the weight of the cabin door is born, the cabin door works for a long time, the cabin door is sunken, the cabin door rotating shaft supporting structure rotates by the gap between the bushing and the rotating shaft, the lower steel ball supports the rotating shaft and can rotate, time and labor are saved, the cost is low, and the cabin door rotating shaft supporting structure can bear larger axial force.

The foregoing is merely specific embodiments of the present application, but the 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 in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A hatch door pivot bearing structure, characterized in that includes:

the rotating shaft (1) is positioned at the lower end of the cabin door, the cabin door rotates by taking the rotating shaft as a center, the axis of the rotating shaft is vertical, and the end face of the rotating shaft (1) is provided with a first spherical recess;

a support member mounted on the machine body, the support member having a groove into which the rotating shaft (1) is inserted, the bottom of the groove having a second spherical recess;

a steel ball (3) is arranged between the first spherical recess and the second spherical recess.

2. Cabin door spindle support structure according to claim 1, characterized in that the support comprises an upper support (6) and a lower support (2); the upper support piece (6) and the lower support piece (2) are provided with a preset distance, and the upper support piece (6) is provided with a through hole for the rotating shaft (1) to pass through.

3. Hatch door spindle supporting structure according to claim 1, characterized in that a first bushing (7) is mounted between the recess and the spindle (1).

4. Cabin door spindle supporting structure according to claim 2, characterized in that a second bushing (5) is mounted between the through hole and the spindle (1).

5. The hatch spindle support structure according to claim 1, wherein the grooves are grease coated.

6. A hatch spindle support structure according to claim 2, characterized in that the bottom of the lower support (2) is a plate, the edges of which are provided with stiffening flanges, the end faces of which are provided with protrusions forming mounting seats, the centre of which is provided with the recess.

7. The door hinge support structure according to claim 6, wherein the mounting base is connected to the reinforcing flange by a plurality of reinforcing ribs.

8. The hatch spindle support structure according to claim 7, wherein the mounting seat is disposed on the stiffening flange.