Dustproof and waterproof slewing bearing

Abstract

The utility model belongs to the technical field of slewing bearings, and particularly relates to a dustproof and waterproof slewing bearing which comprises an outer ring, an inner ring is movably installed in the outer ring, a sealing ring is installed at the butt joint end of the inner ring and the outer ring, and a skirt edge is fixedly installed on the outer wall of one side of the upper end of the sealing ring. The skirt edge and the bottom ring strip are additionally arranged on one side and the bottom of the sealing ring, and the first inner ring, the inner ring cavity and the second inner ring corresponding to the skirt edge and the bottom ring strip are arranged on the outer ring and the inner ring. When in use, the sealing ring can form three groups of sealing structures between the corresponding outer ring and inner ring through the skirt edge and the bottom ring strip, so that the sealing effect of the sealing ring can be improved, and the dustproof and waterproof performance of the slewing bearing can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of slewing bearings, and in particular relates to a dustproof and waterproof slewing bearing. Background Art

[0002] Slewing bearing is an important mechanical component, widely used in various industrial equipment and machinery. It is mainly composed of basic components such as inner and outer rings, rolling elements, cages and sealing rings. This structure enables the slewing bearing to withstand large axial and radial loads and overturning moments at the same time. Slewing bearings are widely used in real industry and are called "machine joints". It is an important transmission component required for machinery that needs to make relative rotational motion between two objects and withstand axial force, radial force and overturning moment at the same time.

[0003] In order to enhance the waterproof and dustproof performance of the slewing bearing, the current design uses two sets of sealing rings between the outer ring and the inner ring. However, the existing sealing ring installation method is to directly seal and dock with the outer ring and the inner ring through two extended skirts. This design actually forms only a single sealing cavity. Due to long-term use and wear, the sealing effect of this sealing cavity will gradually weaken, and eventually the sealing performance of the slewing bearing cannot meet normal working requirements. Utility Model Content

[0004] The utility model aims to provide a dustproof and waterproof slewing bearing, aiming to solve the problem that the sealing ring installation method in the prior art is to directly seal and connect the outer ring and the inner ring through two extended skirts, and this design actually only forms a single sealing cavity. Due to long-term use and wear, the sealing effect of this sealing cavity will gradually weaken, and finally the sealing performance of the slewing bearing cannot meet the normal working requirements.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a dustproof and waterproof slewing bearing, comprising an outer ring, an inner ring movably installed inside the outer ring, a sealing ring installed at the butt end of the inner ring and the outer ring, a skirt fixedly installed on the outer wall of one side of the upper end of the sealing ring, and a bottom ring strip fixedly installed on one side of the bottom of the sealing ring.

[0006] In order to maintain a sealing structure between the bottom of the sealing ring and the connecting ends of the inner ring and the outer ring, as a preferred dustproof and waterproof slewing bearing of the utility model, an extension ring is fixedly connected to one side of the bottom ring strip, and the side cross-sections of the extension ring, the bottom ring strip and the skirt are all fan-shaped structures, and a circle of skirt ring grooves are respectively provided on the upper and lower outer walls of the inner ring close to the inner wall of the outer ring, and the inner part of the skirt ring groove is sealed and connected to the bottom ring strip.

[0007] In order to improve the sealing performance of the connection end between the skirt and the outer ring, as a preferred dustproof and waterproof slewing bearing of the utility model, the bottom of the skirt is fixedly connected with a reinforcement ring, the side section of the reinforcement ring is a semicircular structure, the skirt is sealed and connected to the inside of the first inner ring, and the reinforcement ring is sealed and connected in the inner ring cavity.

[0008] In order to install the edge, reinforcement ring, bottom ring strip and extension ring in the inner ring and the outer ring, as a preferred dustproof and waterproof slewing bearing of the utility model, a second inner ring is respectively provided on both sides of the annular inner cavity of the outer ring, the internal sealing of the second inner ring is connected with the extension ring, an inner ring cavity is also provided in the outer ring on one side of the second inner ring, and the opening end of the inner ring cavity is connected to the inside of the outer ring on the right side to open the first inner ring.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] By adding a skirt and a bottom ring strip to one side and the bottom of the sealing ring, and opening a first inner ring, an inner ring cavity and a second inner ring corresponding to the same on the outer ring and the inner ring, the sealing ring will form three sets of sealing structures again between the corresponding outer ring and the inner ring through the skirt and the bottom ring strip when in use, thereby improving the sealing effect of the sealing ring and thus improving the dustproof and waterproof performance of the slewing bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] 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:

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0013] Figure 2 It is a side cross-sectional structural schematic diagram of the utility model;

[0014] Figure 3 It is a schematic diagram of the detailed structure of the local section of the outer ring of the utility model;

[0015] Figure 4 This is a schematic diagram of the cross-sectional structure of the inner ring of the utility model;

[0016] Figure 5 It is a schematic diagram of the detailed structure of a local cross-section of the sealing ring of the utility model.

[0017] In the figure:

[0018] 1. Outer ring; 101. First inner ring; 102. Inner ring cavity; 103. Second inner ring;

[0019] 2. Inner ring; 201. Skirt ring groove;

[0020] 3. Sealing ring;

[0021] 4. Skirt; 401. Reinforcement ring;

[0022] 5. Bottom ring strip; 501. Extension ring. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-5 The utility model provides the following technical solutions: a dustproof and waterproof slewing bearing, comprising an outer ring 1, an inner ring 2 is movably installed inside the outer ring 1, a sealing ring 3 is installed at the butt end of the inner ring 2 and the outer ring 1, and the gap at the connecting end of the outer ring 1 and the inner ring 2 will be completely blocked by the sealing ring 3, so that external dust and water stains cannot enter the inner cavity of the outer ring 1 and the inner ring 2, thereby achieving the function of dustproof and waterproof.

[0025] A skirt 4 is fixedly mounted on the outer wall of one side of the upper end of the sealing ring 3 , and a bottom ring strip 5 is fixedly mounted on one side of the bottom of the sealing ring 3 .

[0026] Preferably: an extension ring 501 is fixedly docked on one side of the bottom ring strip 5, and the side cross-sections of the extension ring 501, the bottom ring strip 5 and the skirt 4 are all fan-shaped structures, and a circle of skirt ring groove 201 is respectively provided on the upper and lower outer walls of the inner ring 2 close to the inner wall of the outer ring 1, and the inner sealing of the skirt ring groove 201 is docked with the bottom ring strip 5.

[0027] When in use, the side cross-section of the skirt ring groove 201 and the second inner ring 103 is also a semicircular structure, and the inner dimensions of the skirt ring groove 201 and the second inner ring 103 are adapted to the dimensions of the corresponding bottom ring strip 5 and the extension ring 501;

[0028] The arcuate edges of the bottom ring strip 5 and the extension ring 501 are located on both sides of the butt ends thereof, and the butt surfaces of the bottom ring strip 5 and the extension ring 501 are located on the longitudinal vertical midline of the side edge of the sealing ring 3 .

[0029] Preferably: the bottom of the skirt 4 is fixedly docked with a reinforcement ring 401, the side section of the reinforcement ring 401 is a semicircular structure, a second inner ring 103 is provided on both sides of the annular inner cavity of the outer ring 1, and the interior of the second inner ring 103 is sealed and docked with an extension ring 501, an inner ring cavity 102 is also provided in the outer ring 1 on one side of the second inner ring 103, and the inside of the outer ring 1 on the right side of the opening end of the inner ring cavity 102 is also connected to the first inner ring 101, the skirt 4 is sealed and docked inside the first inner ring 101, and the reinforcement ring 401 is sealed and docked in the inner ring cavity 102.

[0030] During specific use, the sizes of the skirt 4 and the reinforcement ring 401 are adapted to the corresponding internal sizes of the first inner ring 101 and the inner ring cavity 102 .

[0031] Working principle: After the outer ring 1 and the inner ring 2 are assembled, two sealing rings 3 need to be installed at the opening of the connecting end of the outer ring 1 and the inner ring 2. The sealing ring 3 is installed so that the skirt 4 and the reinforcement ring 401 on one side thereof are aligned with the transverse opening of the first inner ring 101;

[0032] At the same time, the bottom ring strip 5 at the bottom of the sealing ring 3 needs to be aligned with the opening of the skirt ring groove 201, and the sealing ring 3 is squeezed so that the skirt 4 and the reinforcement ring 401 enter the first inner ring 101 and the inner ring cavity 102, and the bottom ring strip 5 and the extension ring 501 enter the skirt ring groove 201 and the second inner ring 103. After the sealing ring 3 is installed, the sealing ring 3 will form three sets of sealing structures between the outer ring 1 and the inner ring 2, thereby improving the sealing performance of the sealing ring 3, thereby enhancing the waterproof and dustproof effect of the product.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded 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 utility model shall be included in the protection scope of the utility model.

Claims

1. A dustproof and waterproof slewing bearing, comprising an outer ring (1), an inner ring (2) movably mounted inside the outer ring (1), a sealing ring (3) mounted at the butt end of the inner ring (2) and the outer ring (1), characterized in that: A skirt (4) is fixedly mounted on the outer wall of one side of the upper end of the sealing ring (3), and a bottom ring strip (5) is fixedly mounted on one side of the bottom of the sealing ring (3).

2. The dustproof and waterproof slewing bearing according to claim 1, characterized in that: An extension ring (501) is fixedly connected to one side of the bottom ring strip (5), and the side cross-sections of the extension ring (501), the bottom ring strip (5) and the skirt (4) are all fan-shaped structures.

3. The dustproof and waterproof slewing bearing according to claim 1, characterized in that: The bottom of the skirt (4) is fixedly butted with a reinforcement ring (401), and the side cross-section of the reinforcement ring (401) is a semicircular structure.

4. The dustproof and waterproof slewing bearing according to claim 1, characterized in that: A second inner ring (103) is provided on both sides of the annular inner cavity of the outer ring (1), and the interior of the second inner ring (103) is sealed and connected with an extension ring (501). An inner ring cavity (102) is also provided in the outer ring (1) on one side of the second inner ring (103), and the first inner ring (101) is also connected to the interior of the outer ring (1) on the right side of the opening end of the inner ring cavity (102).

5. The dustproof and waterproof slewing bearing according to claim 1, characterized in that: The skirt (4) is sealingly connected to the inside of the first inner ring (101), and the reinforcement ring (401) is sealingly connected to the inner ring cavity (102).

6. The dustproof and waterproof slewing bearing according to claim 1, characterized in that: A circle of skirt ring groove (201) is respectively formed on the upper and lower outer walls of the inner ring (2) close to the inner wall of the outer ring (1), and the inner part of the skirt ring groove (201) is sealed with a bottom ring strip (5).

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