Bidirectional sealing structure of slewing bearing

Abstract

The utility model provides a bidirectional sealing structure of a slewing bearing, which comprises an inner ring and an outer ring, a plurality of rolling bodies are connected between the inner ring and the outer ring, and a sealing component is arranged at the joint of the outer edges of the inner ring and the outer ring; the sealing assembly is used for sealing two ends of a gap formed between the outer ring and the inner ring, and the inner ring and the outer ring are staggered by a certain height; the sealing assembly comprises a fixing part, a transverse sealing part and a vertical sealing part which are integrally formed. The vertical sealing part is inserted into a gap between the outer ring and the inner ring to seal the gap; the transverse sealing part is obliquely arranged in the staggered height of the outer ring and the inner ring for sealing; the fixing part is connected with the outer ring or the inner ring. The bidirectional sealing structure of the slewing bearing can effectively strengthen the prevention of invasion of foreign matters such as external dust and water stains and delay the scratch and damage of the sealing assembly, ensures the reliable storage and lubrication of grease in the raceway, and prolongs the service life of the slewing bearing product.

Description

Technical Field

[0001] The utility model relates to the technical field of slewing bearing equipment, in particular to a bidirectional sealing structure of a slewing bearing. Background Art

[0002] Slewing bearings, also known as turntable bearings or rotary joints, are large special structure bearings that can withstand combined loads. They are usually composed of inner and outer rings, rolling elements (such as balls or rollers), spacers and sealing devices. This type of bearing can simultaneously withstand axial force, radial force and overturning moment, and has the characteristics of large load-bearing capacity, compact structure, and easy installation and maintenance. Slewing bearings are widely used in various mechanical equipment that require rotation functions, such as cranes, excavators, wind turbines, radar antennas, ship steering gears, construction machinery, medical equipment, etc. Its design and manufacturing involve multiple fields such as material science, mechanical engineering, mechanics, etc., and have high requirements for material properties, processing accuracy and surface treatment.

[0003] The existing sealing device of the slewing bearing is generally a sealing strip arranged at the outer edge of the inner and outer rings to form a sealed gap inside the inner and outer rings. The cross-section of the existing sealing device is generally trapezoidal and inserted and fixed on the outer ring or the inner ring. The sealing device of this structure is easily invaded and scratched by foreign objects such as external dust and water stains when the slewing bearing is used, causing damage to the sealing component and failing to ensure reliable storage and lubrication of grease in the raceway. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a bidirectional sealing structure of a slewing bearing, which can solve the existing problems.

[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0006] The utility model is realized through the following technical scheme: a bidirectional sealing structure of a slewing bearing, comprising an inner ring and an outer ring, a plurality of rolling bodies are connected between the inner ring and the outer ring, and a sealing component is provided at the outer edge connection of the inner ring and the outer ring; the sealing component is used to seal the two ends of the gap formed by the outer ring and the inner ring, and the inner ring and the outer ring are staggered by a certain height; the sealing component comprises an integrally formed fixing part, a transverse sealing part and a vertical sealing part; the vertical sealing part is inserted into the gap between the outer ring and the inner ring to seal the gap; the transverse sealing part is inclined and arranged at the staggered height between the outer ring and the inner ring for sealing; the fixing part is connected to the outer ring or the inner ring.

[0007] Furthermore, one side of the vertical sealing portion is a vertical structure, and the other side of the vertical sealing portion is an arc structure; a second protrusion is provided at the arc structure of the vertical sealing portion; the second protrusion and the vertical structure are respectively fitted with the inner walls of the gaps of the outer ring and the inner ring.

[0008] Furthermore, the side of the transverse sealing portion is an arc-shaped structure, and the side of the transverse sealing portion is provided with a first protrusion; the transverse sealing portion and the first protrusion are in contact with the outer ring or the inner ring.

[0009] Furthermore, the vertical sealing portion is a rectangular structure, and the vertical sealing portion is in contact with the inner wall of the gap between the outer ring and the inner ring; the transverse sealing portion is a quadrilateral structure, and the transverse sealing portion is in contact with the outer ring or the inner ring.

[0010] Furthermore, the vertical sealing portion is an elliptical structure, and the vertical sealing portion is in contact with the inner wall of the gap between the outer ring and the inner ring; the transverse sealing portion is a quadrilateral structure, and the transverse sealing portion is in contact with the outer ring or the inner ring.

[0011] Furthermore, an oil cup is inserted into the inner ring, and an oil outlet of the oil cup is connected to a rolling body; a plug and a cone pin are also provided on the side of the inner ring.

[0012] Compared with the prior art, the beneficial effects of the utility model include:

[0013] The utility model improves the structure of the traditional sealing component, and realizes double sealing by inserting the transverse sealing part and the vertical sealing part and by external cleaning and blocking. The transverse sealing part effectively disperses the impact and scratches of external foreign matter on the sealing component, thereby increasing the service life of the sealing component; the vertical sealing part penetrates into the gap between the inner and outer rings of the support, thereby strengthening the defense against the invasion of foreign matter, and at the same time plays a good stabilizing and supporting role for the sealing component as a whole, thereby preventing the sealing component from falling off during operation. The bidirectional sealing structure of the slewing bearing of the utility model can effectively strengthen the defense against the invasion of foreign matter such as external dust and water stains, and delay the damage to the sealing component by scratches, thereby ensuring the reliable storage and lubrication of grease in the raceway, and increasing the service life of the slewing bearing product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0015] Figure 1 It is a structural schematic diagram of an implementation example 1 of a bidirectional sealing structure of a slewing bearing of the utility model;

[0016] Figure 2 For the implementation case of this utility model Figure 1 A schematic diagram of the structure enlarged at point A;

[0017] Figure 3 This is a structural schematic diagram of the second implementation case of the utility model;

[0018] Figure 4 This is an implementation case of the utility model Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0019] Figure 5 This is a schematic diagram of the structure of the third implementation case of the utility model;

[0020] Figure 6 This is an implementation case of the utility model Figure 5 Schematic diagram of the structure at point C in the middle.

[0021] Explanations in the figure: 1. Outer ring; 2. Rolling element; 3. Sealing assembly; 31. Fixed part; 32. Horizontal sealing part; 321. First protrusion; 33. Vertical sealing part; 331. Second protrusion; 4. Inner ring; 5. Oil cup; 6. Plug; 7. Cone pin. DETAILED DESCRIPTION

[0022] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction to the technical solution of the utility model.

[0023] Implementation case 1:

[0024] The utility model provides a bidirectional sealing structure of a slewing bearing, such as Figure 1 As shown, it includes an inner ring 4 and an outer ring 1, a plurality of rolling bodies 2 are connected between the inner ring 4 and the outer ring 1, and a sealing component 3 is provided at the outer edge connection of the inner ring 4 and the outer ring 1; the sealing component 3 is used to seal the two ends of the gap formed by the outer ring 1 and the inner ring 4, and the inner ring 4 and the outer ring 1 are staggered at a certain height; the sealing component 3 includes an integrally formed fixing portion 31, a transverse sealing portion 32 and a vertical sealing portion 33; the vertical sealing portion 33 is inserted into the gap between the outer ring 1 and the inner ring 4 to seal the gap; the transverse sealing portion 32 is tilted and arranged at the staggered height between the outer ring 1 and the inner ring 4 for sealing; the fixing portion 31 is connected to the outer ring 1 or the inner ring 4.

[0025] For example, the inner ring 4 is staggered with the outer ring 1, and the inner ring 4 is higher than the outer ring 1, then the sealing assembly 3 at the upper part is fixed to the side of the inner ring 4, and the sealing assembly 3 at the lower part is fixed to the side of the outer ring 1; now the sealing assembly 3 at the lower part is used as an example; Figure 2 As shown,

[0026] One side of the vertical sealing portion 33 is a vertical structure, and the other side of the vertical sealing portion 33 is an arc structure; a second protrusion 331 is provided at the arc structure of the vertical sealing portion 33; the second protrusion 331 and the vertical structure are respectively fitted with the inner walls of the gap between the outer ring 1 and the inner ring 4; in this embodiment, the vertical structure of the vertical sealing portion 33 is fitted with the outer ring 1, and the second protrusion 331 is fitted with the side wall of the inner ring 4;

[0027] The side of the transverse sealing portion 32 is an arc-shaped structure, and the side of the transverse sealing portion 32 is provided with a first protrusion 321; the transverse sealing portion 32 and the first protrusion 321 are in contact with the outer ring 1 or the inner ring 4; in this embodiment, the first protrusion 321 and the transverse sealing portion 32 form a double-lip structure; the first protrusion 321 and the transverse sealing portion 32 are in contact with the inner ring 4.

[0028] An oil cup 5 is inserted into the inner ring 4 , and an oil outlet of the oil cup 5 is connected to the rolling element 2 . A plug 6 and a taper pin 7 are also provided on the side of the inner ring 4 .

[0029] This implementation case improves the structural form of the traditional sealing assembly. The double-lip design of the transverse sealing part enhances the sealing effect. At the same time, the arc-shaped outer surface design of the transverse sealing part increases the grip of the sealing assembly on the inner ring and enhances the sealing effect. At the same time, the design effectively disperses the impact and scratches of external foreign matter on the sealing assembly, thereby increasing the service life of the sealing assembly. The vertical sealing part deeply supports the gap between the inner and outer rings, which can enhance the defense against the invasion of foreign matter, and at the same time plays a good stabilizing and supporting role for the overall sealing assembly, preventing the sealing assembly from falling off during operation.

[0030] The utility model is preferably implemented in case 1. The sealing component in case 1 has a sealing effect four times stronger than that of a traditional sealing component, a service life 2.5 times longer than that of a traditional sealing component, a support maintenance cycle 1.8 times longer, and a slewing support product service life of more than 1.5 times longer.

[0031] Implementation case 2:

[0032] The utility model provides a bidirectional sealing structure of a slewing bearing, such as Figure 3As shown, it includes an inner ring 4 and an outer ring 1, a plurality of rolling bodies 2 are connected between the inner ring 4 and the outer ring 1, and a sealing component 3 is provided at the outer edge connection of the inner ring 4 and the outer ring 1; the sealing component 3 is used to seal the two ends of the gap formed by the outer ring 1 and the inner ring 4, and the inner ring 4 and the outer ring 1 are staggered at a certain height; the sealing component 3 includes an integrally formed fixing portion 31, a transverse sealing portion 32 and a vertical sealing portion 33; the vertical sealing portion 33 is inserted into the gap between the outer ring 1 and the inner ring 4 to seal the gap; the transverse sealing portion 32 is tilted and arranged at the staggered height between the outer ring 1 and the inner ring 4 for sealing; the fixing portion 31 is connected to the outer ring 1 or the inner ring 4.

[0033] Exemplarily, the inner ring 4 is staggered with the outer ring 1, and the inner ring 4 is higher than the outer ring 1, then the upper sealing assembly 3 is fixed to the side of the inner ring 4, and the lower sealing assembly 3 is fixed to the side of the outer ring 1; the lower sealing assembly 3 is used as an example; Figure 4 As shown,

[0034] The vertical sealing portion 33 is a rectangular structure, and the vertical sealing portion 33 is in contact with the inner wall of the gap between the outer ring 1 and the inner ring 4; the transverse sealing portion 32 is a quadrilateral structure, and the transverse sealing portion 32 is in contact with the outer ring 1 or the inner ring 4. In this embodiment, the vertical sealing portion 33 is inserted into the gap formed by the inner ring 4 and the outer ring 4, and one end of the transverse sealing portion 32 is in contact with the outer ring 1.

[0035] An oil cup 5 is inserted into the inner ring 4 , and an oil outlet of the oil cup 5 is connected to the rolling element 2 . A plug 6 and a taper pin 7 are also provided on the side of the inner ring 4 .

[0036] In this implementation case, the vertical sealing part penetrates deep into the gap between the inner and outer rings of the support, which can strengthen the defense against the invasion of foreign objects. At the same time, it plays a good stabilizing and supporting role for the sealing component as a whole, preventing the sealing component from falling off during operation; the transverse sealing part cooperates with the vertical sealing part to form a two-way seal, thereby strengthening the sealing effect.

[0037] Implementation case three:

[0038] The utility model provides a bidirectional sealing structure of a slewing bearing, such as Figure 5As shown, it includes an inner ring 4 and an outer ring 1, a plurality of rolling bodies 2 are connected between the inner ring 4 and the outer ring 1, and a sealing component 3 is provided at the outer edge connection of the inner ring 4 and the outer ring 1; the sealing component 3 is used to seal the two ends of the gap formed by the outer ring 1 and the inner ring 4, and the inner ring 4 and the outer ring 1 are staggered at a certain height; the sealing component 3 includes an integrally formed fixing portion 31, a transverse sealing portion 32 and a vertical sealing portion 33; the vertical sealing portion 33 is inserted into the gap between the outer ring 1 and the inner ring 4 to seal the gap; the transverse sealing portion 32 is tilted and arranged at the staggered height between the outer ring 1 and the inner ring 4 for sealing; the fixing portion 31 is connected to the outer ring 1 or the inner ring 4.

[0039] Exemplarily, the inner ring 4 is staggered with the outer ring 1, and the inner ring 4 is higher than the outer ring 1, then the upper sealing assembly 3 is fixed to the side of the inner ring 4, and the lower sealing assembly 3 is fixed to the side of the outer ring 1; the lower sealing assembly 3 is used as an example; Figure 6 As shown,

[0040] The vertical sealing portion 33 is an elliptical structure, and the vertical sealing portion 33 is in contact with the inner wall of the gap between the outer ring 1 and the inner ring 4; the transverse sealing portion 32 is a quadrilateral structure, and the transverse sealing portion 32 is in contact with the outer ring 1 or the inner ring 4. In this embodiment, the vertical sealing portion 33 with an elliptical structure is inserted into the gap between the outer ring 1 and the inner ring 4, which can enhance the firmness of the connection with the gap, and the transverse sealing portion 32 is in contact with the outer ring 1.

[0041] An oil cup 5 is inserted into the inner ring 4 , and an oil outlet of the oil cup 5 is connected to the rolling element 2 . A plug 6 and a taper pin 7 are also provided on the side of the inner ring 4 .

[0042] In this embodiment, the vertical sealing part penetrates deeply into the gap between the inner and outer rings of the support, which can strengthen the defense against the invasion of foreign objects. At the same time, it plays a good stabilizing and supporting role for the sealing component as a whole, preventing the sealing component from falling off during operation; the horizontal sealing part cooperates with the vertical sealing part to form a two-way seal, which strengthens the sealing effect.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0046] The technical scope of the present invention is not limited to the contents described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A bidirectional sealing structure of a slewing bearing, characterized in that: The invention comprises an inner ring (4) and an outer ring (1), wherein a plurality of rolling elements (2) are connected between the inner ring (4) and the outer ring (1), and a sealing assembly (3) is provided at the outer edge connection of the inner ring (4) and the outer ring (1); the sealing assembly (3) is used to seal the two ends of the gap formed by the outer ring (1) and the inner ring (4), and the inner ring (4) and the outer ring (1) are staggered at a certain height; the sealing assembly (3) comprises an integrally formed fixing portion (31), a transverse sealing portion (32) and a vertical sealing portion (33); the vertical sealing portion (33) is inserted into the gap between the outer ring (1) and the inner ring (4) to seal the gap; the transverse sealing portion (32) is obliquely arranged at the staggered height between the outer ring (1) and the inner ring (4) to perform sealing; the fixing portion (31) is connected to the outer ring (1) or the inner ring (4).

2. A bidirectional sealing structure of a slewing bearing according to claim 1, characterized in that: One side of the vertical sealing portion (33) is a vertical structure, and the other side of the vertical sealing portion (33) is an arc-shaped structure; a second protrusion (331) is provided at the arc-shaped structure of the vertical sealing portion (33); the second protrusion (331) and the vertical structure are respectively fitted with the inner walls of the gaps of the outer ring (1) and the inner ring (4).

3. A bidirectional sealing structure of a slewing bearing according to claim 2, characterized in that: The side of the transverse sealing portion (32) is an arc-shaped structure, and the side of the transverse sealing portion (32) is provided with a first protrusion (321); the transverse sealing portion (32) and the first protrusion (321) are in contact with the outer ring (1) or the inner ring (4).

4. The bidirectional sealing structure of a slewing bearing according to claim 1, characterized in that: The vertical sealing portion (33) is a rectangular structure, and the vertical sealing portion (33) is in contact with the inner wall of the gap between the outer ring (1) and the inner ring (4); the transverse sealing portion (32) is a quadrilateral structure, and the transverse sealing portion (32) is in contact with the outer ring (1) or the inner ring (4).

5. The bidirectional sealing structure of a slewing bearing according to claim 1, characterized in that: The vertical sealing portion (33) is an elliptical structure, and the vertical sealing portion (33) is in contact with the inner wall of the gap between the outer ring (1) and the inner ring (4); the transverse sealing portion (32) is a quadrilateral structure, and the transverse sealing portion (32) is in contact with the outer ring (1) or the inner ring (4).

6. A bidirectional sealing structure for a slewing bearing according to any one of claims 1 to 5, characterized in that: An oil cup (5) is inserted into the inner ring (4), and the oil outlet of the oil cup (5) is connected to the rolling body (2); a plug (6) and a taper pin (7) are also provided on the side of the inner ring (4).

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