Positioning slewing bearing with good sealing effect

Abstract

The utility model belongs to the technical field of positioning slewing support bearings, and particularly relates to a positioning slewing support bearing with a good sealing effect, which comprises an outer ring and an inner ring connected to the inner side of the outer ring, and a rolling body is mounted in the joint of the outer ring and the inner ring; a mounting groove is formed in the inner side of the outer ring, an outer sealing lip is connected to the surface of the joint of the outer ring and the inner ring, an inner sealing lip is connected to the bottom end of the outer sealing lip, and a mounting strip is connected to one side of the inner sealing lip. The outer sealing lip and the inner sealing lip are driven to be in sealed connection at the gap between the outer ring and the inner ring, at the moment, the bottom end of the inner sealing lip is tightly attached to the rolling body area, the sealing performance between the outer ring and the inner ring is ensured, meanwhile, the blocking column is in sealed connection with the sealing ring, and then the whole positioning slewing bearing is conveniently in sealed connection. Dust is prevented from entering, and internal lubricating oil is prevented from leaking.

Description

Technical Field

[0001] This utility model belongs to the technical field of positioning slewing bearings, specifically relating to positioning slewing bearings with good sealing effect. Background Technology

[0002] Positioning slewing bearings are precision rotating components capable of withstanding axial force, radial force, and overturning moment. They are mainly used in mechanical devices that require precise angular positioning and stable rotation, and can simultaneously withstand vertical loads (axial), horizontal loads (radial), and rotational torque.

[0003] Single-row crossed roller slewing bearings feature crossed rollers, offering high load-bearing capacity, good rigidity, and small footprint, but require high manufacturing precision. They are widely used in engineering machinery, wind power equipment, port machinery, medical equipment, and industrial robots. However, in long-term engineering practice using positioning slewing bearings, the mainstream products on the market generally use traditional single-lip contact seals. These seals suffer from insufficient weather resistance and design flaws in the sealing interface, leading to progressive failure of the sealing system under long-term alternating loads. This failure manifests as: a microscopic furrowing effect at the contact surface between the sealing lip and the journal, causing axial permeable leakage of the medium; simultaneously, the lack of radial compensation in the sealing structure makes it prone to forming local gaps under off-center load conditions, resulting in the dual damage of impurity intrusion and grease loss. Utility Model Content

[0004] The purpose of this invention is to provide a positioning slewing bearing with good sealing performance. This addresses the problem that, in long-term use of existing positioning slewing bearings, the conventional single-lip contact seals commonly used in the market suffer from insufficient weather resistance and design flaws in the sealing interface, leading to progressive failure of the sealing system under long-term alternating loads. Specifically, this failure manifests as a microscopic ploughing effect at the contact surface between the sealing lip and the journal, causing axial permeable leakage of the medium. Simultaneously, the lack of radial compensation in the sealing structure makes it prone to forming local gaps under off-center load conditions, resulting in the dual problems of impurity intrusion and grease loss.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a positioning slewing bearing with good sealing effect, comprising an outer ring and an inner ring connected to the inner side of the outer ring, wherein rolling elements are installed inside the connection between the outer ring and the inner ring;

[0006] An outer sealing lip is connected to the surface at the connection between the outer ring and the inner ring. An inner sealing lip is connected to the bottom end of the outer sealing lip. An installation strip is connected to one side of the inner sealing lip. An installation groove is connected to the inner side of the outer ring near the installation strip. A blocking groove is opened on the inner wall of the inner ring. A blocking column is connected to the inner wall of the blocking groove. A sealing ring is installed on the inner wall of the blocking groove.

[0007] As a preferred positioning slewing bearing with good sealing effect according to this utility model, both the outer sealing lip and the inner sealing lip are made of rubber, and the outer sealing lip and the inner sealing lip are an integral structure.

[0008] As a preferred positioning slewing bearing with good sealing effect according to this utility model, the mounting strip has a T-shaped cross-section, and the mounting strip and the mounting groove form an interference fit.

[0009] As a preferred positioning slewing bearing with good sealing effect according to this utility model, the bottom surface of the outer sealing lip is in contact with the surface of the outer ring, and the bottom end of the inner sealing lip is in close contact with the rolling element area.

[0010] As a preferred positioning slewing bearing with good sealing effect according to this utility model, the plugging groove and the plugging column are threadedly connected, and the inner ring has a positioning groove on the inner wall near the plugging groove.

[0011] As a preferred positioning slewing bearing with good sealing effect according to this utility model, the inner wall of the positioning groove is connected with a sealing installation strip, and the sealing installation strip and the sealing ring form an integral structure.

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

[0013] This invention involves fitting and engaging the mounting strip on one side of the inner sealing lip with the mounting groove on the inner side of the outer ring. This causes the outer and inner sealing lips to form a sealing connection at the gap between the outer and inner rings. At this time, the bottom end of the inner sealing lip is in close contact with the rolling element area, ensuring the sealing between the outer and inner rings. Simultaneously, the plugging post is sealed to the sealing ring, thereby facilitating the overall sealing connection of the positioning slewing bearing, preventing dust from entering, and preventing internal lubricating oil leakage. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of the positioning slewing bearing of this utility model;

[0016] Figure 2This is a schematic diagram of the cross-sectional structure of the positioning slewing bearing of this utility model;

[0017] Figure 3 This is an exploded view of the outer sealing lip structure of this utility model;

[0018] Figure 4 This is an exploded view of the blocking column installation structure of this utility model;

[0019] Figure 5 This is an enlarged structural diagram of point A in this utility model;

[0020] Figure 6 This is an enlarged structural diagram of section B of this utility model.

[0021] In the diagram: 1. Outer ring; 2. Inner ring; 3. Rolling element; 4. Outer sealing lip; 5. Inner sealing lip; 6. Mounting strip; 7. Mounting groove; 8. Plug groove; 9. Plug post; 10. Positioning groove; 11. Sealing mounting strip; 12. Sealing ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-6 The present invention provides the following technical solution: a positioning slewing bearing with good sealing effect, including an outer ring 1 and an inner ring 2 connected to the inner side of the outer ring 1, and a rolling element 3 is installed inside the connection between the outer ring 1 and the inner ring 2;

[0024] An outer sealing lip 4 is connected to the surface where the outer ring 1 and the inner ring 2 meet. An inner sealing lip 5 is connected to the bottom end of the outer sealing lip 4. An installation strip 6 is connected to one side of the inner sealing lip 5. An installation groove 7 is connected to the inner side of the outer ring 1 near the installation strip 6. A blocking groove 8 is opened on the inner wall of the inner ring 2. A blocking column 9 is connected to the inner wall of the blocking groove 8. A sealing ring 12 is installed on the inner wall of the blocking groove 8.

[0025] Preferably, both the outer sealing lip 4 and the inner sealing lip 5 are made of rubber, and the outer sealing lip 4 and the inner sealing lip 5 are an integral structure.

[0026] In practical use, the bidirectional tight contact structure between the outer sealing lip 4 and the inner sealing lip 5 facilitates the improvement of the sealing performance of the positioning slewing bearing.

[0027] Preferably, the mounting strip 6 has a T-shaped cross-section, and the mounting strip 6 and the mounting groove 7 form an interference fit.

[0028] In practical use, by installing the mounting strip 6 inside the mounting groove 7, the outer sealing lip 4 and the inner sealing lip 5 can be installed stably, thereby improving the service life of the outer sealing lip 4 and the inner sealing lip 5.

[0029] Preferably, the bottom surface of the outer sealing lip 4 is in contact with the surface of the outer ring 1, and the bottom end of the inner sealing lip 5 is in close contact with the area of ​​the rolling element 3.

[0030] Preferably, the plugging groove 8 and the plugging column 9 are threaded together, and the inner ring 2 has a positioning groove 10 on the inner wall near the plugging groove 8.

[0031] In practical use, the plugging post 9 is easily installed by tightening the plugging post 9 with the plugging groove 8.

[0032] Preferably, the inner wall of the positioning groove 10 is connected to a sealing installation strip 11, and the sealing installation strip 11 and the sealing ring 12 form an integral structure.

[0033] In practical use, the sealing installation strip 11 is installed in the positioning groove 10 on the inner wall of the inner ring 2, which facilitates the stable installation of the sealing ring 12. Then, the sealing ring 12 is sealed and connected to the plugging column 9, which facilitates the sealing contact of the plugging column 9, improves the sealing performance, and avoids lubricating oil leakage.

[0034] The working principle of this utility model is as follows: By engaging and connecting the mounting strip 6 on one side of the inner sealing lip 5 with the mounting groove 7 on the inner side of the outer ring 1, the outer sealing lip 4 and the inner sealing lip 5 are sealed together in the gap between the outer ring 1 and the inner ring 2. At this time, the bottom end of the inner sealing lip 5 is in close contact with the area of ​​the rolling element 3. The bidirectional structure between the outer lip and the inner lip improves the sealing performance between the outer ring 1 and the inner ring 2. At the same time, the plugging post 9 passes through the plugging groove 8, and the sealing mounting strip 11 is installed into the positioning groove 10, thereby driving the sealing ring 12 to be installed stably. At this time, the plugging post 9 and the sealing ring 12 are sealed together, which facilitates the overall sealing connection of the positioning slewing bearing, prevents dust from entering, and prevents internal lubricating oil leakage.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A positioning slewing bearing with a good sealing effect, comprising an outer ring (1) and an inner ring (2) connected to the inner side of the outer ring (1), characterized in that: A rolling element (3) is installed inside the connection between the outer ring (1) and the inner ring (2); An outer sealing lip (4) is connected to the surface where the outer ring (1) and the inner ring (2) are connected. An inner sealing lip (5) is connected to the bottom end of the outer sealing lip (4). An installation strip (6) is connected to one side of the inner sealing lip (5). An installation groove (7) is connected to the inner side of the outer ring (1) near the installation strip (6). A blocking groove (8) is opened on the inner wall of the inner ring (2). A blocking column (9) is connected to the inner wall of the blocking groove (8). A sealing ring (12) is installed on the inner wall of the blocking groove (8).

2. Slew bearing with a sealing effect according to claim 1, characterized in that Both the outer sealing lip (4) and the inner sealing lip (5) are made of rubber, and the outer sealing lip (4) and the inner sealing lip (5) are an integral structure.

3. The positioning slew bearing with a sealing effect according to claim 1, characterized in that: The mounting strip (6) has a T-shaped cross section, and the mounting strip (6) and the mounting groove (7) form an interference fit.

4. The positioning slew bearing with a sealing effect according to claim 1, characterized in that: The bottom surface of the outer sealing lip (4) is in contact with the surface of the outer ring (1), and the bottom end of the inner sealing lip (5) is in close contact with the area of ​​the rolling element (3).

5. The positioning slew bearing with a sealing effect according to claim 1, characterized in that: The plugging groove (8) and the plugging column (9) are threaded together, and the inner ring (2) has a positioning groove (10) on its inner wall near the plugging groove (8).

6. The positioning slew bearing with a sealing effect according to claim 5, characterized in that: The inner wall of the positioning groove (10) is connected to a sealing installation strip (11), and the sealing installation strip (11) and the sealing ring (12) form an integral structure.

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