A combined bearing for supporting a stabilizing device

Abstract

The present invention relates to a combined bearing for supporting a stabilizing device, comprising an outer ring for cooperating with the inner cavity of an outer connecting member, a shaft ring and an inner ring for cooperating with the outer wall of an inner connecting member; the inner ring is connected to the outer ring in an inner and outer manner, and radial balls arranged in an annular manner are arranged between the outer side surface of the inner ring and the inner side surface of the outer ring, so that the inner ring and the outer ring form a radial bearing capable of bearing radial loads; the shaft ring is axially connected to the outer ring, and axial balls arranged in an annular manner are arranged between the butt end surfaces of the shaft ring and the outer ring, so that the shaft ring and the outer ring form a thrust ball bearing capable of bearing axial loads. The combined bearing of the present invention can effectively increase the rigidity reserve of the bearing group when a large-diameter, thin-walled thrust ball bearing and an angular contact ball bearing are used in combination under specific constraints.

Description

Technical Field

[0001] The invention relates to a combined bearing for supporting a stabilizing device and belongs to the field of tail assembly. Background Art

[0002] The existing bearing structure used to support the fixed stabilizer on the tail of the missile mostly adopts a combination of thrust ball bearings and deep groove ball bearings. During the development process, it was found that due to the limitations of the engine nozzle and the stabilizer tail tube structure size, the bearing group technical solution adopted can only be a non-standard bearing with a large diameter and thin wall thickness (thickness-to-diameter ratio less than 0.1), and the bearing must have a certain anti-corrosion performance under long-term storage conditions. The typical martensitic high-hardness, high-wear-resistant and corrosion-resistant stainless steel is used to manufacture the bearing parts. Due to the limitations of the mechanical properties of stainless steel materials, the rigidity of the finished product is also limited. In the later stage of the ballistic flight of the guided rocket, the operating temperature of the bearing also becomes higher under the combined effect of long-term continuous aerodynamic heating and nozzle heat conduction. In addition to the effect of aerodynamic load, the bearing may have some deformation that affects its rotation flexibility, thereby affecting the rotation flexibility of the stabilizer. In view of this possible adverse situation, under the existing constraints, it is necessary to take effective and reliable technical measures to enhance the bearing's stiffness reserve so as to enhance its ability to cope with certain possible extreme working environments and working loads, improve working reliability, and better meet the control system's requirements for the self-unspinning performance of the stabilization device. The combined bearing solution that combines the two bearings has become a technical solution with the least changes and is easiest to implement. Summary of the invention

[0003] The main purpose of the present invention is to increase the strength reserve of the bearing group when a large-diameter, thin-walled thrust ball bearing and a deep groove ball bearing are used in combination under specific constraints, so as to ensure that they can reliably complete specific work tasks. To this end, a combined bearing for supporting a stabilizing device is provided.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A combined bearing for supporting a stabilizing device of the present invention comprises an outer ring for cooperating with the inner cavity of an outer connecting piece, a shaft ring and an inner ring for cooperating with the outer wall of an inner connecting piece;

[0006] The inner ring is connected to the outer ring in an inner and outer manner, and radial balls arranged in an annular manner are arranged between the outer side surface of the inner ring and the inner side surface of the outer ring, and all the radial balls arranged in an annular manner are connected in series through a radial retainer, so that the inner ring and the outer ring form a radial bearing that can withstand radial loads;

[0007] The shaft ring is axially connected to the outer ring, and an annularly arranged axial balls are arranged between the butt end faces of the shaft ring and the outer ring, and all the annularly arranged axial balls are connected in series through an axial retainer, so that the shaft ring and the outer ring form a thrust ball bearing that can withstand axial loads;

[0008] The ball matching surface on the inner side of the outer ring is located on the side where the shaft ring is installed and is provided with a tapered positioning surface.

[0009] The ball matching surfaces on the inner side and end face of the outer ring are both groove-free structures.

[0010] The surface of the radial retainer is silver plated.

[0011] The ball matching surface on the inner side of the outer ring is located at the end opposite to the shaft ring installation and a dust cover is installed between the inner ring.

[0012] The outer side surface of the outer ring is fixed to the radial matching surface of the inner wall of the outer layer component, and the outer ring is tightly fitted between the end surface of the shaft ring opposite to the installation end and the axial matching surface of the inner wall of the outer layer component; the inner side surface of the inner ring is fixed to the radial matching surface of the outer wall of the inner layer component; the uninstalled ball end of the shaft ring is tightly fitted to the axial matching surface of the outer wall of the inner layer component; the two sets of the combined bearings are arranged front and back between the outer layer component and the inner layer component, and the two sets of the combined bearings are arranged symmetrically.

[0013] Beneficial Effects

[0014] The combined bearing of the present invention can effectively increase the strength reserve of the bearing group when a large-diameter, thin-walled thrust ball bearing and an angular contact ball bearing are used in combination under specific constraints, thereby ensuring that they can reliably complete specific work tasks. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the combined bearing of the present invention;

[0016] Figure 2 It is a schematic diagram of the application of the combined bearing of the present invention on the tail of a bullet;

[0017] In the figure, 1-shaft ring; 2-axial ball; 3-axial retainer; 4-outer ring; 5-radial ball; 6-dust cover; 7-radial retainer; 8-inner ring. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Example

[0020] like Figure 1As shown, a combined bearing for supporting a stabilizing device of the present invention comprises an outer ring 4 for cooperating with the inner cavity of an outer connecting member, a shaft ring 1 and an inner ring 8 for cooperating with the outer wall of an inner connecting member;

[0021] The inner ring 8 is connected to the outer ring 4 in an inner and outer manner, and radial balls 5 arranged in an annular manner are arranged between the outer side surface of the inner ring 8 and the inner side surface of the outer ring 4, and all the radial balls 5 arranged in an annular manner are connected in series through a radial retainer 7, so that the inner ring 8 and the outer ring 4 form a radial bearing that can withstand radial loads;

[0022] The shaft ring 1 is axially connected to the outer ring 4, and an annularly arranged axial balls 2 are arranged between the butt end faces of the shaft ring 1 and the outer ring 4, and all the annularly arranged axial balls 2 are connected in series through an axial retainer 3, so that the shaft ring 1 and the outer ring 4 constitute a thrust ball bearing that can withstand axial loads;

[0023] The ball matching surface on the inner side of the outer ring 4 is located on the installation side of the shaft ring 1 and is provided with a tapered positioning surface.

[0024] The ball matching surfaces on the inner side and end face of the outer ring 4 are both groove-free structures.

[0025] The surface of the radial retainer 7 is silver-plated.

[0026] The ball matching surface on the inner side of the outer ring 4 is located at the end opposite to the installation end of the shaft ring 1 and a dust cover 6 is installed between the inner ring 8.

[0027] The schematic diagram of the combined bearing of the present invention applied to the tail of the bullet is as follows: Figure 2 As shown,

[0028] The outer side surface of the outer ring 4 is fixed to the radial matching surface of the inner wall of the tail stabilizer, and the outer ring 4 is tightly matched between the end surface of the shaft ring 1 opposite to the installation end and the axial matching surface of the inner wall of the tail stabilizer; the inner side surface of the inner ring 8 is fixed to the radial matching surface of the outer wall of the projectile; the uninstalled ball end of the shaft ring 1 is tightly matched with the axial matching surface of the outer wall of the projectile;

[0029] The two sets of combined bearings are arranged front and rear between the tail stabilizing device and the projectile, and the two sets of combined bearings are arranged symmetrically.

Claims

1. A combined bearing for supporting a stabilizing device, Its characteristics are: It includes an outer ring for cooperating with the inner cavity of the outer connecting piece, and a shaft ring and an inner ring for cooperating with the outer wall of the inner connecting piece; The inner ring is connected to the outer ring in an inner and outer manner, and radial balls arranged in an annular manner are arranged between the outer side surface of the inner ring and the inner side surface of the outer ring, and all the radial balls arranged in an annular manner are connected in series through a radial retainer, so that the inner ring and the outer ring form a radial bearing that can withstand radial loads; The shaft ring is axially connected to the outer ring, and annularly arranged axial balls are arranged between the butt end faces of the shaft ring and the outer ring, and all the annularly arranged axial balls are connected in series through an axial retainer, so that the shaft ring and the outer ring constitute a thrust ball bearing that can withstand axial loads.

2. A combined bearing for supporting a stabilizing device according to claim 1, Its characteristics are: The ball matching surface on the inner side of the outer ring is located on the side where the shaft ring is installed and is provided with a tapered positioning surface.

3. A combined bearing for supporting a stabilizing device according to claim 1, Its characteristics are: The ball matching surfaces on the inner side and end face of the outer ring are both groove-free structures.

4. A combined bearing for supporting a stabilizing device according to claim 1, Its characteristics are: The surface of the radial retainer is silver plated.

5. A combined bearing for supporting a stabilizing device as claimed in claim 1, Its characteristics are: The ball matching surface on the inner side of the outer ring is located at the end opposite to the shaft ring installation and a dust cover is installed between the inner ring.

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