Muddy-water-proof rolling bearing

Abstract

The utility model provides a muddy water prevention rolling bearing, which comprises an outer ring, an inner ring and a rolling body, a sealing structure is also arranged between the outer ring and the inner ring, the sealing structure comprises an inner sealing element, an outer sealing element and a baffle which are arranged at one axial end and are sequentially distributed, a first sealing groove which is in interference installation corresponding to an inner lip of the inner sealing element is arranged on the inner ring, and a second sealing groove which is in interference installation corresponding to an outer lip of the outer sealing element is arranged on the outer ring. A second sealing groove corresponding to an outer lip of the outer sealing piece is formed in the outer ring, a plurality of first side lips abutting against a framework of the outer sealing piece in an interference mode are arranged on the inner sealing piece, and a plurality of second side lips abutting against the axial inward side of the baffle in an interference mode are arranged on the outer sealing piece. The axial inward side of the baffle is fixedly connected with the inner ring, the baffle covers the gap between the outer ring and the inner ring to prevent water and mud, the sealing structure is arranged on the single side of the bearing and is of an asymmetric structure, the occupied space of the bearing is reduced, the overall protection capacity of the sealing structure is improved, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The utility model relates to a muddy water-proof rolling bearing. Background Art

[0002] The muddy water-proof bearing can work normally in harsh environments containing muddy water, etc., preventing muddy water and foreign objects from entering the interior of the bearing, thereby reducing the wear and failure of the bearing. Such bearings are usually applied to agricultural machinery, excavators, mud pumps and other equipment that need to operate in dusty and muddy environments. The sealing structure of the muddy water-proof rolling bearing is relatively tight, which can prevent impurities such as water and sediment from invading the interior of the bearing to a certain extent, ensuring the stable operation of the bearing and extending its service life.

[0003] In some bearing operating conditions, the external environment is harsh, and one side of the bearing will directly contact the external environment. If external muddy water or impurities invade the bearing, it will cause the bearing grease to be contaminated and the raceway to be severely worn, causing the bearing to fail quickly. At present, the sealing structure of the muddy water-proof bearing is thin, the sealing effect is not significant, it is easy to fail in the muddy water environment and cause impurities to enter the interior of the bearing, unable to ensure the normal operation of the bearing, and unable to play the role of preventing muddy water. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a muddy water-proof rolling bearing.

[0005] To achieve the above object, the utility model provides a muddy water-proof rolling bearing, which includes an outer ring, an inner ring and rolling elements located between the inner ring and the outer ring. A sealing structure is also provided between the outer ring and the inner ring. The sealing structure includes an inner seal, an outer seal and a baffle plate arranged in sequence at one axial end. A first sealing groove for the interference fit installation of the inner lip of the inner seal is arranged on the inner ring. A second sealing groove for the outer lip of the outer seal is arranged on the outer ring. A number of first side lips that interfere with and abut against the skeleton of the outer seal are arranged on the inner seal. A number of second side lips that interfere with and abut against the inner side of the baffle plate axially are arranged on the outer seal. The inner side of the baffle plate axially is fixedly connected to the inner ring. The baffle plate covers the gap between the outer ring and the inner ring to prevent water and mud.

[0006] Further, the baffle plate includes a first base body fixedly connected to the inner ring and a second base body rotatably arranged on the first base body. The first base body and the second base body are detachably connected. By disassembling and assembling second base bodies with different diameters, baffle plates with different muddy water-blocking effects can be formed.

[0007] Further, a radially outwardly protruding platform is provided at the center of the first base body, and the second base body is rotatably sleeved on the protruding platform. The first base body is provided with a first channel, one end of the first channel is open on the side wall of the protruding platform, and the other end of the first channel is open on the radially inward side of the first base body and is aligned with the second side lip distributed near the inner ring on the outer seal.

[0008] Further, a second channel is provided on the second base body, one end of the second channel corresponds to the side wall of the protruding platform, and the other end of the second channel communicates with the outside. By rotating the second base body, the second channel can be aligned and communicated with the first channel.

[0009] Further, the interference amount between the inner lip of the inner seal and the first seal groove provided on the inner ring is 0.10 mm.

[0010] Further, the interference amount between the outer lip of the outer seal and the second seal groove provided on the outer ring is 0.10 mm.

[0011] Further, the interference amount between the first side lip on the inner seal and the skeleton of the outer seal is 0.10 mm.

[0012] Further, the interference amount between the second side lip on the outer seal and the baffle is 0.08 mm, and the second side lip has an elliptical cross section.

[0013] The beneficial effects of the present utility model are as follows: The single-sided double-seal structure provided at one axial end of the bearing includes two multi-lip seals respectively cooperating with the inner and outer rings and a baffle. An interference fit is formed between the inner lip of the inner seal and the first seal groove of the inner ring, and a first waterproof and anti-mud structure is formed by the cooperation of the outer lip of the inner seal and the outer ring. A second waterproof and anti-mud structure is formed by the interference fit between the first side lip on the inner seal and the skeleton of the outer seal. A third waterproof and anti-mud structure is formed by the inner and outer lips of the outer seal respectively with the inner and outer rings. A fourth waterproof and anti-mud structure is formed by the interference fit between the second side lip on the outer seal and the baffle. By providing a seal structure on one side of the bearing, which is an asymmetric structure, the space occupied by the bearing is reduced, the overall protection ability of the seal structure is further improved, the service life of the bearing is prolonged, the maintenance frequency and cost are reduced, the continuous and stable operation of the equipment under harsh working conditions is ensured, and the dust and waterproof performance of the bearing is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic cross-sectional structure diagram of an embodiment of the present utility model;

[0015] Figure 2 is Figure 1 an enlarged structural diagram of part A of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The embodiments of the present utility model will be further described below in conjunction with the accompanying drawings: As shown in the figure, a mud and water-proof rolling bearing includes an outer ring 1, an inner ring 2, and rolling elements located between the inner ring 2 and the outer ring 1. A sealing structure is further provided between the outer ring 1 and the inner ring 2. The sealing structure includes an inner seal 3, an outer seal 4, and a baffle 5 arranged in sequence at one axial end. A first sealing groove 6 for press-fitting the inner lip of the inner seal 3 is provided on the inner ring 2. A second sealing groove 7 for installing the outer lip of the outer seal 4 is provided on the outer ring 1. A number of first side lips 8 that press-fit against the skeleton of the outer seal 4 are provided on the inner seal 3. A number of second side lips 9 that press-fit against the inner side in the axial direction of the baffle 5 are provided on the outer seal 4. The inner side in the axial direction of the baffle 5 is fixedly connected to the inner ring 2. The baffle 5 covers the gap between the outer ring 1 and the inner ring 2 to prevent water and mud.

[0017] The baffle 5 includes a first base body 10 fixedly connected to the inner ring 2 and a second base body 11 rotatably arranged on the first base body 10. The first base body 10 and the second base body 11 are detachably connected. By disassembling and assembling second base bodies 11 with different diameters, a baffle 5 with different mud and water blocking effects can be formed. By replacing second base bodies 11 with different diameters, the size of the baffle 5 can be adjusted according to the actual use environment and requirements, flexibly forming different mud and water blocking effects, enhancing the adaptability of the sealing structure; simplifying the maintenance and replacement process, making maintenance more convenient.

[0018] A radially outward convex platform 12 is provided at the center of the first base body 10. The second base body 11 is sleeved and rotatably arranged on the convex platform 12. The first base body 10 is provided with a first channel 13. One end of the first channel 13 is open on the side wall of the convex platform 12, and the other end of the first channel 13 is open on the radially inner side of the first base body 10 and is aligned with the second side lip 9 distributed on the outer seal 4 near the inner ring 2. The setting of the convex platform 12 provides a stable support and positioning structure, enabling the second base body 11 to rotate precisely and maintain its position, enhancing the stability and reliability of the baffle 5; the first channel 13 can supply or discharge lubricating oil to the position of the second side lip 9, ensuring the lubrication effect between the second side lip 9 and the outer sealing ring and the inner and outer rings 1 of the bearing, extending the service life of the sealing member; in addition, this structural design is also convenient for maintenance and inspection. When the second side lip 9 between the outer seal 4 and the baffle 5 fails to seal, the external mud and water accumulate at the outer lip of the outer seal 4, and it can be discharged through the first channel 13, which can extend the service life of the outer seal 4.

[0019] A second channel 14 is provided on the second base body 11. One end of the second channel 14 is correspondingly arranged on the side wall of the boss 12, and the other end of the second channel 14 communicates with the outside. By rotating the second base body 11, the second channel 14 can be aligned and communicated with the first channel 13. When the second channel 14 can be communicated with the first channel 13, it can ensure that the end of the first channel 13 corresponding to the inside of the bearing can perform maintenance behaviors such as oil injection, oil discharge, and drainage. By rotating the second base body 11, the first channel 13 and the second channel 14 can be misaligned to ensure the sealing effect of the overall sealing structure and improve convenience.

[0020] The interference fit between the inner lip of the inner seal 3 and the first seal groove 6 provided on the inner ring 2 is 0.10 mm.

[0021] The interference fit between the outer lip of the outer seal 4 and the second seal groove 7 provided on the outer ring 1 is 0.10 mm.

[0022] The interference fit between the first side lip 8 on the inner seal 3 and the skeleton of the outer seal 4 is 0.10 mm.

[0023] The interference fit between the second side lip 9 on the outer seal 4 and the baffle 5 is 0.08 mm, and the second side lip 9 has an elliptical cross-section.

[0024] The above embodiments are only one of the preferred specific embodiments of the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A mud-proof rolling bearing, comprising an outer ring, an inner ring and rolling elements located between the inner ring and the outer ring, characterized in that: A sealing structure is also provided between the outer ring and the inner ring. The sealing structure includes an inner seal, an outer seal, and a baffle that are arranged in sequence at one axial end. A first sealing groove for the interference fit installation of the inner lip of the inner seal is provided on the inner ring. A second sealing groove for the installation of the outer lip of the outer seal is provided on the outer ring. A number of first side lips that are in interference contact with the skeleton of the outer seal are provided on the inner seal. A number of second side lips that are in interference contact with the inner side of the baffle in the axial direction are provided on the outer seal. The inner side of the baffle in the axial direction is fixedly connected to the inner ring. The baffle covers the gap between the outer ring and the inner ring to prevent water and mud.

2. The anti-muddy water rolling bearing according to claim 1, wherein: The baffle includes a first base body fixedly connected to the inner ring and a second base body rotatably arranged on the first base body. The first base body and the second base body are detachably connected. By disassembling and assembling second base bodies of different diameters, a baffle with different mud and water blocking effects can be formed.

3. The anti-muddy water rolling bearing according to claim 2, wherein: A radially outward convex platform is provided at the center of the first base body. The second base body is sleeved and rotated on the convex platform. The first base body is provided with a first channel. One end of the first channel is open on the side wall of the convex platform. The other end of the first channel is open on the radially inner side of the first base body and is aligned with the second side lip distributed near the inner ring on the outer seal.

4. The anti-muddy water rolling bearing according to claim 3, characterized in that: A second channel is provided on the second base body. One end of the second channel corresponds to the side wall of the convex platform. The other end of the second channel communicates with the outside. By rotating the second base body, the second channel can be aligned and communicated with the first channel.

5. The anti-muddy water rolling bearing according to claim 1, characterized in that: The interference amount between the inner lip of the inner seal and the first sealing groove provided on the inner ring is 0.10 mm.

6. The anti-mud and water rolling bearing according to claim 1, characterized in that: The interference amount between the outer lip of the outer seal and the second sealing groove provided on the outer ring is 0.10 mm.

7. The anti-muddy water rolling bearing according to claim 1, wherein: The interference amount between the first side lip on the inner seal and the skeleton of the outer seal is 0.10 mm.

8. The anti-muddy water rolling bearing according to claim 6, characterized in that: The interference amount between the second side lip on the outer seal and the baffle is 0.08 mm. The second side lip has an elliptical cross-section.

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