Bearing muddy water prevention oil seal

Abstract

The utility model discloses a muddy water prevention oil seal for a bearing, which belongs to the field of oil seals and comprises a rubber oil seal body, the rubber oil seal body is annular, the section of the rubber oil seal body is L-shaped, the outer ring surface of the rubber oil seal body is contacted with the inner wall of an outer steel ring of the bearing, and a first lip edge is arranged on the inner side surface of the rubber oil seal body. A first lip edge is arranged on the inner ring face of the rubber oil seal body, a second lip edge is arranged on the inner ring face of the rubber oil seal body, the first lip edge and the second lip edge are both arranged in an inwards inclined mode and make contact with the outer surface of a bearing inner ring and the outer surface of a bearing outer ring, a connecting ring is embedded in an outer ring of the inner side face of the rubber oil seal body, and extrusion rods are evenly hinged to the inner ring face of the connecting ring. The hard connecting ring is fixed to the inner side of the oil seal, the multiple rotatable extrusion rods are installed on the inner side of the connecting ring, the lip plate is extruded by synchronously controlling the angles of the multiple extrusion rods, then the attaching strength of the lip edge and the inner ring is improved, and the sealing effect of the oil seal is improved.

Description

Technical Field

[0001] The utility model relates to the field of oil seals, and more specifically to a bearing anti-mud and water oil seal. Background Art

[0002] Bearings are a crucial component in modern machinery. Their primary function is to support rotating parts, reduce friction during movement, and ensure rotational accuracy. During operation, bearings are often sealed on both sides with a sealing cap and oil seal. Rubber oil seals are located within the sealing cap to enhance sealing, prevent grease leakage, and reduce the risk of dust, mud, and water entering the bearing, potentially affecting ball rotation.

[0003] Since existing oil seals are supported by rubber, they are mostly fixed by extrusion deformation and cooperation with the grooves in the bearing steel ring. However, the bearing may vibrate during use, which will affect the sealing effect of the oil seal. The internal lip and the bearing have limited sealing. When the sealing effect is reduced, external mud and water will enter the bearing, affecting the service life of the bearing. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a bearing anti-mud and water oil seal, which can improve the tightness of the oil seal installation.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the present invention adopts the following technical solutions.

[0008] A bearing anti-mud and water oil seal includes a rubber oil seal body, the rubber oil seal body is annular, the cross-section of the rubber oil seal body is L-shaped, the outer ring surface of the rubber oil seal body contacts the inner wall of the bearing outer steel ring, the inner side surface of the rubber oil seal body is provided with a first lip edge, the inner ring surface of the rubber oil seal body is provided with a second lip edge, the first lip edge and the second lip edge are both inclined inwardly, and the first lip edge and the second lip edge are in contact with the outer surfaces of the inner and outer rings of the bearing, the outer ring of the inner side surface of the rubber oil seal body is inlaid with a connecting ring, the inner ring surface of the connecting ring is evenly hinged with extrusion rods, the end of the extrusion rod is provided with an extrusion ball head, and multiple extrusion ball heads are in contact with the surface of the first lip edge.

[0009] Furthermore, a movable ring is placed inside the rubber oil seal body, and the movable ring is placed between the extrusion rod and the rubber oil seal body. Extension rods are evenly and vertically arranged on one side surface of the movable ring, and multiple extension rods correspond to the extrusion rods one by one.

[0010] Furthermore, a sliding sleeve is slidably mounted on the surface of the extrusion rod, and the end of the extension rod is hinged on the sliding sleeve.

[0011] Furthermore, a control bolt is evenly rotated and installed on the outer surface of the movable ring. The control bolt is screwed through the rubber oil seal body. A hexagonal screw head is provided at the front end of the control bolt, and the hexagonal screw head is placed on the front side of the rubber oil seal body.

[0012] Furthermore, an L-shaped metal skeleton is embedded in the rubber oil seal body.

[0013] Furthermore, a limiting portion is provided on the front side of the outer ring of the rubber oil seal body, and the limiting portion contacts the front surface of the bearing.

[0014] 3. Beneficial effects

[0015] Compared with the existing technology, the advantages of the present invention are: the present invention provides a bearing anti-mud and water oil seal, a hard connecting ring is fixed on the inside of the oil seal, and multiple rotatable extrusion rods are installed on the inside of the connecting ring. By synchronously controlling the angles of the multiple extrusion rods, the lip plate is squeezed, thereby increasing the fit between the lip edge and the inner ring, improving the sealing effect of the oil seal, and preventing external mud and water from entering the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 4 For the utility model Figure 3 Schematic diagram of the enlarged structure of area A.

[0020] Explanation of the numbers in the figure: 1. Rubber oil seal body; 2. Limiting part; 3. Metal frame; 4. First lip; 5. Second lip; 6. Connecting ring; 7. Extrusion rod; 71. Extrusion ball head; 8. Sliding sleeve; 9. Moving ring; 91. Extension rod; 10. Control bolt; 11. Hexagon socket screw head. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] Example:

[0023] See also Figure 1-Figure 4 As shown, a bearing anti-mud and water oil seal includes a rubber oil seal body 1, which is annular and is installed on both sides of the bearing and placed between the inner and outer rings of the bearing. The cross-section of the rubber oil seal body 1 is L-shaped, and the outer ring surface of the rubber oil seal body 1 contacts the inner wall of the bearing outer steel ring to prevent internal grease leakage. The outer ring of the rubber oil seal body 1 is provided with a protrusion, and the inner ring surface of the bearing outer steel ring is provided with a concave surface that matches the inner surface. The inner side surface of the rubber oil seal body 1 is provided with a first lip edge 4, and the inner ring surface of the rubber oil seal body 1 is provided with a second lip edge 5. The first lip edge 4 and the second lip edge 5 are both inclined inwardly, and the first lip edge 4 and the second lip edge 5 are aligned with the inner ring surface of the rubber oil seal body 1. The outer surfaces of the inner and outer rings of the bearing are in contact to maintain the seal while the inner ring of the bearing rotates. The outer ring of the inner side of the rubber oil seal body 1 is inlaid with a connecting ring 6. The connecting ring 6 is supported by a hard material, and can be made of hard plastic or metal. The inner ring surface of the connecting ring 6 is evenly hinged with an extrusion rod 7, and an extrusion ball head 71 is provided at the end of the extrusion rod 7. Multiple extrusion ball heads 71 ​​are in contact with the surface of the first lip 4. By controlling the inclination angle of the extrusion rod 7, the first lip 4 in the inclined state is squeezed to increase the contact force between the first lip 4 and the inner ring of the bearing, thereby improving the sealing. In addition, the extrusion force should not be too large, otherwise it will affect the rotation of the inner ring of the bearing.

[0024] Please refer to Figure 2 and Figure 4 As shown, a movable ring 9 is placed on the inner side of the rubber oil seal body 1. The movable ring 9 is placed between the extrusion rod 7 and the rubber oil seal body 1. The movable ring 9 can move axially. Extension rods 91 are evenly and vertically arranged on the surface of one side of the movable ring 9. The extension rods 91 are arranged along the axis of the movable ring 9. Multiple extension rods 91 correspond to the extrusion rod 7 one by one. A sliding sleeve 8 is slidably installed on the surface of the extrusion rod 7. The end of the extension rod 91 is hinged on the sliding sleeve 8. The sliding sleeve 8 can rotate with the extension rod 91, thereby compensating for the distance difference when the extrusion rod 7 rotates at an angle.

[0025] Among them, a control bolt 10 is evenly rotated and installed on the outer surface of the movable ring 9. The control bolt 10 is screwed through the rubber oil seal body 1. A hexagonal screw head 11 is provided at the front end of the control bolt 10. The hexagonal screw head 11 is placed on the front side of the rubber oil seal body 1. There are at least 4 control bolts 10, so as to ensure the smooth axial movement of the movable ring 9 by screwing the diagonal control bolts 10 respectively.

[0026] Please refer to Figure 4 As shown, an L-shaped metal skeleton 3 is embedded in the rubber oil seal body 1 to adjust the strength of the rubber oil seal body 1 .

[0027] Among them, a limiting part 2 is set on the front side of the outer ring of the rubber oil seal body 1, and the limiting part 2 contacts the front surface of the bearing to facilitate the installation of the rubber oil seal body 1 and keep it flush with the bearing surface.

[0028] Working principle: Place the rubber oil seal body 1 between the inner and outer rings of the bearing, and through the limiting part 2, so that the front surface of the rubber oil seal body 1 contacts the side of the bearing. At this time, the bottoms of the first lip 4 and the second lip 5 are both in contact with the inner ring of the bearing to prevent internal lubrication from leaking. After installation, the control bolt 10 can be driven to rotate by cooperating with the external tool and the hexagonal screw head 11, and then the axial position of the movable ring 9 can be adjusted. When the movable ring 9 moves forward, the sliding sleeve 8 can be pulled forward by the extension rod 91 to mobilize the extrusion rod 7 to rotate forward. When the extrusion rod 7 rotates forward, the first lip 4 is expanded by the extrusion ball head 71 to increase the contact force between the first lip 4 and the inner ring of the bearing, thereby improving the sealing and preventing oil leakage.

[0029] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed in the present invention, makes equivalent substitutions or modifications based on the technical solution and its improved concepts shall be covered by the scope of protection of the present invention.

Claims

1. A bearing anti-mud and water oil seal, comprising a rubber oil seal body (1), characterized in that: The rubber oil seal body (1) is annular, and the cross section of the rubber oil seal body (1) is L-shaped. The outer ring surface of the rubber oil seal body (1) contacts the inner wall of the outer steel ring of the bearing. The inner side surface of the rubber oil seal body (1) is provided with a first lip (4), and the inner ring surface of the rubber oil seal body (1) is provided with a second lip (5). The first lip (4) and the second lip (5) are both inclined inward, and the first lip (4) and the second lip (5) contact the outer surfaces of the inner and outer rings of the bearing. The outer ring of the inner side surface of the rubber oil seal body (1) is inlaid with a connecting ring (6), and the inner ring surface of the connecting ring (6) is evenly hinged with an extrusion rod (7). The end of the extrusion rod (7) is provided with an extrusion ball head (71), and a plurality of the extrusion ball heads (71) are in contact with the surface of the first lip (4).

2. The bearing anti-mud and water oil seal according to claim 1, characterized in that: A movable ring (9) is placed inside the rubber oil seal body (1), and the movable ring (9) is placed between the extrusion rod (7) and the rubber oil seal body (1). Extension rods (91) are evenly and vertically arranged on one side surface of the movable ring (9), and a plurality of the extension rods (91) correspond to the extrusion rods (7) one by one.

3. The bearing anti-mud and water oil seal according to claim 2, characterized in that: A sliding sleeve (8) is slidably mounted on the surface of the extrusion rod (7), and the end of the extension rod (91) is hinged on the sliding sleeve (8).

4. The bearing anti-mud and water oil seal according to claim 3, characterized in that: A control bolt (10) is evenly rotated and mounted on the outer surface of the movable ring (9), and the control bolt (10) is screwed through the rubber oil seal body (1). A hexagonal screw head (11) is provided at the front end of the control bolt (10), and the hexagonal screw head (11) is placed on the front side of the rubber oil seal body (1).

5. The bearing anti-mud and water oil seal according to claim 1, characterized in that: An L-shaped metal skeleton (3) is embedded inside the rubber oil seal body (1).

6. The bearing anti-mud and water oil seal according to claim 1, characterized in that: A limiting portion (2) is provided on the front side of the outer ring of the rubber oil seal body (1), and the limiting portion (2) is in contact with the front surface of the bearing.

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