Ultrahigh-precision positioning slewing bearing

Abstract

The utility model belongs to the technical field of positioning slewing bearings, and particularly relates to an ultrahigh-precision positioning slewing bearing which comprises an outer ring and an inner ring connected to the inner side of the outer ring, mounting holes are formed in the surface of the outer ring and the surface of the inner ring, a rolling body is connected to an opening between the outer ring and the inner ring, and the rolling body is arranged in the mounting holes. A sealing ring is connected to a gap between the outer ring and the inner ring; a plug is connected to an opening of the inner wall of the inner ring, a sealing washer is connected to the inner wall, close to the plug, of the inner ring, and a sealing groove is formed in the inner wall, close to the opening of the sealing washer, of the inner ring. A sealing state is formed through mutual extrusion, so that the outer ring and the inner ring are in a sealing state, dust and impurities cannot pass through and block a lubricating channel, the service life of the rolling body is prolonged, and the precision of the slewing bearing is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of slewing bearings, and in particular relates to an ultra-high precision positioning slewing bearing. Background Art

[0002] The slewing bearing is a large bearing that can bear comprehensive loads and can bear large axial, radial loads and overturning moments at the same time. It is mainly composed of inner and outer rings, rolling elements (such as balls or rollers) and cages. According to different structures and uses, slewing bearings can be divided into many types, such as single-row four-point contact ball type, double-row ball type, single-row cross roller type, etc.

[0003] The working principle of the slewing bearing is based on rolling friction, and the load is transmitted and the relative rotational motion is achieved by the rolling of the rolling elements between the outer ring and the inner ring. This design enables the slewing bearing to withstand large loads and maintain low friction and wear. However, during the continuous operation of the slewing bearing, its core components, the rolling elements (including balls or rollers) and the precision-machined raceways, will have high-frequency contact and relative rolling motion. When the equipment is in a harsh working environment, such as an environment filled with a lot of dust, humid moisture, corrosive gases or other mechanical impurities, this wear process will be significantly accelerated. Dust particles may be embedded between the raceway and the rolling element, acting as abrasive particles to intensify wear; moisture and corrosive substances may erode the surface of the material, destroy the lubricating film, increase the friction coefficient, and further promote wear. In addition, impurities may also block the lubrication channel, affecting the lubrication effect, making the lubricant originally designed to slow down wear unable to fully function. Utility Model Content

[0004] The purpose of the utility model is to provide an ultra-high precision positioning slewing bearing, aiming to solve the problem in the prior art that when the above-mentioned slewing bearing is in use, when the equipment is in a harsh working environment, such as an environment filled with a large amount of dust, humid moisture, corrosive gas or other mechanical impurities, the wear process will be significantly accelerated. Dust particles may be embedded between the raceway and the rolling element, acting as abrasive particles to aggravate the wear; moisture and corrosive substances may erode the surface of the material, destroy the lubricating film, increase the friction coefficient, and further promote wear. In addition, impurities may also block the lubrication channel, affecting the lubrication effect, making it impossible for the lubricant originally designed to slow down the wear to fully play its role.

[0005] To achieve the above object, the utility model provides the following technical solution: an ultra-high precision positioning slewing bearing, comprising an outer ring and an inner ring connected to the inner side of the outer ring, the surfaces of the outer ring and the inner ring are both provided with mounting holes, a rolling body is connected to the opening between the outer ring and the inner ring, and a sealing ring is connected to the gap between the outer ring and the inner ring;

[0006] The inner wall opening of the inner ring is connected with a plug, the inner wall of the inner ring close to the plug is connected with a sealing gasket, and the inner wall of the opening of the inner ring close to the sealing gasket is provided with a sealing groove.

[0007] As a preferred embodiment of the ultra-high precision positioning slewing bearing of the utility model, a screw is connected to one side of the plug, and the screw is threadedly connected to the inner ring near the inner wall opening of the plug.

[0008] As a preferred embodiment of the ultra-high precision positioning slewing bearing of the utility model, an oil nozzle is installed on the inner wall of the inner ring.

[0009] As a preferred embodiment of the ultra-high precision positioning slewing bearing of the utility model, the surface of the sealing gasket is connected to a mounting bar, and the surface of the mounting bar is an arc-shaped structure.

[0010] As a preferred embodiment of the ultra-high precision positioning slewing bearing of the utility model, the sealing gasket forms an interference fit structure with the sealing groove through the mounting strip.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model rotates the plugging thread into the plug hole of the inner wall of the inner ring, and then the front end of the screw touches the sealing gasket, and a sealing state is formed by mutual extrusion, so that the outer ring and the inner ring are in a sealed state, so that dust and impurities will not pass through and block the lubrication channel, thereby improving the service life of the rolling body and ensuring the accuracy of the slewing bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of the main structure of the slewing bearing of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the slewing bearing of the utility model;

[0016] Figure 3 This is a schematic diagram of the plugging installation structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the sealing gasket installation structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the sealing gasket structure of the utility model.

[0019] In the figure: 1, outer ring; 2, inner ring; 3, mounting hole; 4, rolling element; 5, sealing ring; 6, grease nozzle; 7, plug; 71, screw; 8, sealing gasket; 81, mounting strip; 9, sealing groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 The utility model provides the following technical solutions: an ultra-high precision positioning slewing bearing, comprising an outer ring 1 and an inner ring 2 connected to the inner side of the outer ring 1, the surfaces of the outer ring 1 and the inner ring 2 are both provided with mounting holes 3, a rolling body 4 is connected to the opening between the outer ring 1 and the inner ring 2, and a sealing ring 5 is connected to the gap between the outer ring 1 and the inner ring 2;

[0022] The inner wall opening of the inner ring 2 is connected with a plug 7 , the inner wall of the inner ring 2 near the plug 7 is connected with a sealing gasket 8 , and the inner wall of the opening of the inner ring 2 near the sealing gasket 8 is provided with a sealing groove 9 .

[0023] Preferably, a screw rod 71 is connected to one side of the plug 7 , and the screw rod 71 and the inner ring 2 are threadedly connected near the inner wall opening of the plug 7 .

[0024] During specific use, the plug 7 is installed by means of a thread to prevent the plug 7 from falling off.

[0025] Preferably, an oil nozzle 6 is installed on the inner wall of the inner ring 2 .

[0026] Preferably: the surface of the sealing gasket 8 is connected with a mounting strip 81 , and the surface of the mounting strip 81 is in an arc-shaped structure.

[0027] During specific use, the sealing gasket 8 is used to form a sealing structure with the screw 71 .

[0028] Preferably, the sealing gasket 8 forms an interference fit structure with the sealing groove 9 through the mounting strip 81 .

[0029] During specific use, the sealing gasket 8 can be conveniently installed and fixed by installing the installation strip 81 into the sealing groove 9 .

[0030] The working principle of the utility model when used specifically is: first, the screw 71 on one side of the plug 7 is threaded into the plug hole on the inner wall of the inner ring 2, and then the front end of the screw 71 touches the sealing gasket 8 installed by the mounting strip 81. During the specific installation, the mounting strip 81 is embedded into the sealing groove 9 to keep the sealing gasket 8 stable, and a sealing state is formed by mutual extrusion, so that the outer ring 1 and the inner ring 2 are in a sealed state, so that dust and impurities will not block the lubrication channel, thereby improving the service life of the rolling element 4.

[0031] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ultra-high precision positioning slewing bearing, comprising an outer ring (1) and an inner ring (2) connected to the inner side of the outer ring (1), characterized in that: The surfaces of the outer ring (1) and the inner ring (2) are both provided with mounting holes (3); a rolling body (4) is connected to the opening between the outer ring (1) and the inner ring (2); and a sealing ring (5) is connected to the gap between the outer ring (1) and the inner ring (2); The inner wall opening of the inner ring (2) is connected to a plug (7), the inner wall of the inner ring (2) close to the plug (7) is connected to a sealing gasket (8), and the inner wall of the opening of the inner ring (2) close to the sealing gasket (8) is provided with a sealing groove (9).

2. The ultra-high precision positioning slewing bearing according to claim 1, characterized in that: A screw rod (71) is connected to one side of the plug (7), and the screw rod (71) is threadedly connected to an opening of the inner wall of the inner ring (2) close to the plug (7).

3. The ultra-high precision positioning slewing bearing according to claim 1, characterized in that: An oil nozzle (6) is installed on the inner wall of the inner ring (2).

4. The ultra-high precision positioning slewing bearing according to claim 1, characterized in that: The surface of the sealing gasket (8) is connected to a mounting strip (81), and the surface of the mounting strip (81) is in an arc-shaped structure.

5. The ultra-high precision positioning slewing bearing according to claim 1, characterized in that: The sealing gasket (8) forms an interference fit structure with the sealing groove (9) through the mounting strip (81).

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