Dustproof sealing bearing for rocker arm of coal mining machine

Abstract

The invention relates to the technical field of bearings, in particular to a dustproof sealing bearing for a rocker arm of a coal mining machine, which comprises an inner ring, an outer ring and dustproof components respectively arranged on the end faces of the two sides of the inner ring and the outer ring. The dustproof assembly comprises a sealing assembly and a baffle which are sequentially arranged from inside to outside in the axial direction. The side, away from the baffle, of the sealing assembly abuts against the inner ring and the outer ring so as to prevent external dust from entering the raceway space between the inner ring and the outer ring. The inner surface of the baffle is provided with a partition plate which is connected with the sealing assembly and is of a vortex-shaped structure. The sealing assembly and the baffle are fixed to the outer ring and the inner ring correspondingly and can synchronously rotate along with relative rotation between the inner ring and the outer ring. When the rotating direction of the baffle is opposite to that of the partition plate, the partition plate can push dust on the surface of the sealing assembly to move towards the outer ring. The dustproof sealing bearing is good in dustproof sealing performance, simple in overall structure and low in manufacturing cost, and the problems that dust enters the bearing to affect the service life of the bearing and frequent maintenance is needed are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of bearing dust prevention technology, and in particular to a dustproof sealed bearing for a coal mining machine rocker arm. Background Technology

[0002] The rocker arm of a coal mining machine is a core component of fully mechanized coal mining equipment. It undertakes the key functions of cutting coal seams, transmitting power, and adjusting the cutting height. The movement of the rocker arm during operation requires bearings as a connection. However, during coal mining, there is a lot of dust in the environment. If dust enters the bearings, it will cause abnormal bearing rotation, resulting in the coal mining machine failing to work properly.

[0003] In the existing technology, most coal mining machine rocker arm bearings rely solely on dustproof plates for dust prevention. This method is not only cumbersome to install and disassemble, but also inevitably leaves gaps between the dustproof plate and the inner and outer rings due to the relative motion between the inner and outer rings of the bearing. This allows dust to enter the bearing, so existing dustproof bearings still suffer from dust ingress and require relatively high maintenance frequency.

[0004] Therefore, there is an urgent need for a dustproof and sealed bearing with good dustproof sealing performance. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a dustproof sealed bearing for the rocker arm of a coal mining machine, which solves the problems of poor dustproof sealing performance of existing bearings, easy dust to enter the bearing, affecting the normal operation and service life of the bearing, and the need for frequent maintenance.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] The present invention provides a dustproof sealed bearing for a rocker arm of a coal mining machine, comprising an inner ring and an outer ring arranged concentrically, and dustproof components respectively disposed on the end faces of the inner ring and the outer ring.

[0010] The dustproof assembly includes a sealing component and a baffle arranged sequentially from the inside to the outside along the axial direction. The side of the sealing component away from the baffle abuts against the inner and outer rings to prevent external dust from entering the raceway space between the inner and outer rings. The inner surface of the baffle is provided with a vortex-shaped partition that connects to the sealing component. The sealing component and the baffle are fixed to the outer and inner rings respectively, and they can rotate synchronously with the relative rotation between the inner and outer rings.

[0011] When the direction of rotation of the baffle is opposite to that of the direction of rotation of the partition, the partition can push the dust on the surface of the sealing assembly towards the outer ring.

[0012] The optional partition can be a continuous raised wall with a rectangular or outwardly inclined trapezoidal cross-section, and the outermost spiral ring is the dust discharge outlet.

[0013] Optionally, the sealing assembly includes a sealing plate and a rubber ring. The sealing plate is fixed to the end face of the outer ring, and the outer ring of the rubber ring is fixed to the radial inner side of the sealing plate. Its lower end face abuts against the inner ring, and its inner ring abuts against the baffle.

[0014] Optionally, the outer ring has a first mounting groove at its end, and multiple threaded holes are formed at the bottom of the first mounting groove. The sealing plate has multiple through holes that are adapted to the threaded holes, and screws are screwed into the threaded holes and through holes.

[0015] Optionally, a second mounting groove is provided at the end of the inner ring near the outer peripheral wall, and a connecting groove is provided on the side wall of the second mounting groove. A protrusion adapted to the connecting groove is provided on the inner peripheral wall of the baffle, and the protrusion engages with the connecting groove.

[0016] Optionally, the baffle is a split structure, which is divided into multiple plates in the circumferential direction, and the plates can be detachably connected.

[0017] Optionally, the baffle is divided into a left baffle and a right baffle, which are symmetrically arranged. Both ends of the left and right baffles have protrusions, and each protrusion has a connecting hole penetrating its inner and outer walls. Both ends of the right baffle have fixing grooves that fit the protrusions, and both the inner and outer walls of the fixing grooves have fixing holes that fit the connecting holes. The protrusions are engaged in the fixing grooves, and bolts are sequentially passed through the outer fixing hole, the connecting hole, and the inner fixing hole, with the bolts connected to the fixing holes by threaded screws.

[0018] Optionally, the system further includes a rolling assembly disposed between the inner and outer rings. This rolling assembly includes two retainers and a plurality of balls. The two retainers are arranged axially side-by-side within the raceway space formed by the inner and outer rings. The plurality of balls are rollably accommodated within the raceway space formed by the inner and outer rings, and are circumferentially evenly distributed between the two retainers, with the spherical surface of each ball abutting against both retainers.

[0019] (III) Beneficial Effects

[0020] The beneficial effects of this invention are:

[0021] This invention discloses a dustproof sealed bearing for a coal mining machine rocker arm. By installing dustproof components at the top and bottom of the bearing, the sealing performance between the inner and outer rings is improved, and the bearing gains the ability to automatically clean dust. The dustproof components first act as seals against the inner and outer rings, initially blocking external dust and preventing it from entering the raceway space between the inner and outer rings. Furthermore, a baffle is installed outside the seal components, and a vortex-structured partition is provided on the inner surface of the baffle. During rotation, this automatically pushes dust from the surface of the seal components towards the outer ring, further preventing dust from entering the raceway space or moving towards the inner ring, thus ensuring the normal operation of the bearing.

[0022] Therefore, compared with traditional bearings, this dustproof sealed bearing has greatly improved dustproof sealing performance, and has a simple overall structure and low manufacturing cost. It effectively solves the problems of dust entering the bearing and affecting its service life and requiring frequent maintenance. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of Embodiment 1 of a dustproof sealing bearing for a coal mining machine rocker arm according to the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of the internal structure of the dustproof sealed bearing (with the baffle hidden).

[0025] Figure 3 for Figure 1 A schematic diagram of the dustproof sealed bearing after the sealing assembly has been installed;

[0026] Figure 4 for Figure 1 A cross-sectional view of the dustproof sealed bearing in the diagram;

[0027] Figure 5 for Figure 1 A schematic diagram of the baffle in the dustproof sealed bearing;

[0028] Figure 6 for Figure 5 A magnified view of a section of the middle baffle;

[0029] Figure 7 for Figure 1 A schematic diagram of the connection position of the left baffle in the dustproof sealed bearing.

[0030] [Explanation of Labels in the Attached Image]

[0031] 1: Inner ring; 2: Outer ring; 3: Baffle; 31: Left baffle; 32: Right baffle;

[0032] 4: Fixing hole; 5: Protrusion; 6: Bolt; 7: Partition; 71: Dust outlet; 8: Dust baffle; 81: Gap;

[0033] 9: Retainer; 10: Ball bearing; 11: Connecting groove; 12: Sealing plate; 13: Rubber ring;

[0034] 14: Through hole; 15: Screw; 16: Protrusion; 17: Threaded hole; 18: Second mounting slot;

[0035] 19: First mounting slot. Detailed Implementation

[0036] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. In this document, directional terms such as "up," "down," "left," and "right" are used interchangeably. Figure 1 The orientation is used as a reference.

[0037] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0038] Example 1:

[0039] Reference Figure 1 This embodiment provides a dustproof sealed bearing for a coal mining machine rocker arm, including an inner ring 1 and an outer ring 2 arranged concentrically, a rolling assembly disposed between the inner ring 1 and the outer ring 2, and dustproof assemblies disposed on the end faces of the inner ring 1 and the outer ring 2 respectively, that is, the dustproof assemblies are respectively disposed at the top and bottom of the bearing.

[0040] Among them, such as Figure 2 As shown, the rolling assembly includes two retainers 9 and a plurality of balls 10. The two retainers 9 are arranged side by side along the axial direction in the raceway space formed by the inner ring 1 and the outer ring 2. The plurality of balls 10 are rotatably accommodated in the raceway space formed by the inner ring 1 and the outer ring 2. At the same time, the plurality of balls 10 are evenly distributed circumferentially between the two retainers 9, and the spherical surface of each ball 10 abuts against the two retainers 9.

[0041] like Figure 3 , Figure 4As shown, the dustproof assembly includes a sealing component and a baffle 3 arranged sequentially from the inside to the outside along the bearing's axial direction. The sealing component is fixed to the outer ring 2, and the baffle 3 is fixed to the inner ring 1. The sealing component includes a sealing plate 12 and a rubber ring 13. The sealing plate 12 is fixed to the end face of the outer ring 2. The outer ring of the rubber ring 13 is fixed to the radially inner side of the sealing plate 12, its lower end face abuts against the inner ring 1, and its inner ring abuts against the baffle 3. That is, the inner ring of the rubber ring 13 abuts against the radially outer position where the baffle 3 connects to the inner ring 1. The side of the sealing component away from the baffle 3, that is, the side facing the raceway space, abuts against the end faces of the inner ring 1 and the outer ring 2 respectively through the sealing plate 12 and the rubber ring 13. At this point, the two sealing components located at the top and bottom of the bearing, together with the inner ring 1 and the outer ring 2, form a sealed space. The bearing raceway space is located inside this sealed space. Therefore, the sealing components can protect the raceway space between the inner ring 1 and the outer ring 2, preventing external dust from entering the raceway space. Simultaneously, the rubber ring 13 abuts against the baffle 3 to create a better seal, preventing dust from entering the raceway space from the joint.

[0042] The outer ring 2 has a first mounting groove 19 on its end surface, and multiple threaded holes 17 are formed at the bottom of the groove. Simultaneously, the sealing plate 12 has multiple through holes 14 that are identical in number and size, and their positions correspond one-to-one. Screws 15 are then screwed into the threaded holes 17 and through holes 14 to fix the sealing plate 12 to the outer ring 2. Preferably, the first mounting groove 19 communicates with the inner circumferential wall of the outer ring 2, forming a stepped structure. The position where the sealing plate 12 meets the outer ring 2 is also designed with a stepped structure that matches the shape of the first mounting groove 19. After installation, the sealing plate 12 is flush with the end face of the outer ring 2, which facilitates dust removal.

[0043] like Figure 5 As shown, a vortex-shaped baffle 7 is provided on the inner surface of the baffle 3, which is connected to the sealing assembly. The baffle 7 is a continuous raised wall, that is, a spiral vertical plate (baffle 7) is fixed on the inner surface of the baffle 3. The vertical plate is spiral in the circumference, with one end fixed to the inner surface of the baffle 3 in the axial direction and the other end abutting against the sealing assembly. The dust outlet 71 is located at the end of the outermost spiral ring of the baffle 7. The cross-section of the baffle 7 is rectangular or an outwardly inclined trapezoid, preferably an outwardly inclined trapezoid to reduce resistance and enhance the outward thrust. The number of spiral rings of the baffle 7 can be set to 2-5 rings depending on the size of the bearing, to cover the entire end face of the sealing assembly, so that the dust gradually moves outward without accumulating. The baffle 7 is preferably made of wear-resistant stainless steel, which can be integrally formed with the baffle 3, or the two can be connected by embedding or welding.

[0044] Furthermore, such as Figure 4As shown, a second mounting groove 18 is provided at the end of the inner ring 1 near the outer peripheral wall. A connecting groove 11 is provided on the side wall of the second mounting groove 18. The second mounting groove 18 communicates with the outer peripheral wall of the inner ring 1 and forms a stepped structure. That is, the cross-section of the second mounting groove 18 is an L-shaped structure with the opening facing outwards. The connecting groove 11 is located on the vertical side of the L-shaped structure. At the same time, a protrusion 16 adapted to the connecting groove 11 is provided on the inner peripheral wall of the baffle 3, that is, the position corresponds and the size is the same. The protrusion 16 engages with the connecting groove 11 to fix the baffle 3 to the inner ring 1. When installing the baffle 3 on the inner ring 1, it can be installed by low temperature cold installation or hot installation. At the same time, in order to adapt to the position of the connecting groove 11 and further ensure the sealing, a flange facing the inner ring 1 can be provided on the inner side of the baffle 3. The protrusion 16 is located on the inner side wall of the flange, and the position where the rubber ring 13 abuts is the outer side wall of the flange.

[0045] Furthermore, since the sealing assembly and baffle 3 are fixed to the outer ring 2 and inner ring 1 respectively, they can synchronously rotate with the relative rotation between the inner ring 1 and the outer ring 2. When the rotation direction of baffle 3 is opposite to the rotation direction of partition 7, partition 7 can push the dust on the surface of the sealing assembly towards the outer ring 2, similar to unscrewing a screw ("unloading" outwards). That is, while baffle 3 rotates, it drives partition 7 to rotate. Since partition 7 has a vortex structure, based on the principle of physical propulsion, the rotating partition 7, through contact and friction with the dust, has its spiral wall surface "scraping" or "pushing" the dust outwards along the spiral path. At the same time, the slight centrifugal force generated by the rotation can also assist the dust to move outwards, similar to radial spiral conveying or scraper systems in industry. Therefore, partition 7 can push the dust on the surface of sealing plate 12 towards the outer ring 2, so as to push the dust out of the bearing from the dust discharge port 71 in time, preventing dust from leaking into the raceway space from the sealing assembly, further ensuring a clean working environment in the raceway space, and ensuring the normal operation of retainer 9 and ball 10.

[0046] Conversely, when the rotation direction of the baffle 3 is the same as that of the partition 7, the partition 7 will push the dust on the surface of the sealing plate 12 towards the inner ring 1, similar to tightening a screw, causing the dust to accumulate at the junction of the baffle 3 and the rubber ring 13. To prevent dust from accumulating excessively at this location or entering the raceway space from the rubber ring 13 and affecting the normal operation of the bearing, such as... Figure 6 As shown, in this embodiment, multiple dust baffles 8 are horizontally spaced and inclined between every two adjacent walls of the partition 7. The multiple dust baffles 8 are evenly distributed circumferentially, and their overall shape forms a spiral consistent with the rotation direction of the partition 7. A gap 81 for dust discharge is left between the end of the dust baffle 8 near the radially outer side of the bearing and the partition 7.

[0047] Here, we assume that the rotation direction of the baffle 7 is counterclockwise to describe the two cases of bearing rotation (forward and reverse). When the bearing rotates forward (clockwise), the rotation direction of the baffle 3 is opposite to that of the baffle 7. The baffle 7 and multiple dust baffles 8 can push the dust on the surface of the sealing assembly towards the outer ring 2, gradually pushing the dust from the gap 81 to the outside, and finally discharging it from the dust outlet 71. When the bearing rotates in reverse (counterclockwise), the rotation direction of the baffle 3 is the same as that of the baffle 7. The dust will be blocked within the angle formed by the dust baffles 8 and the baffle 7, preventing the dust from approaching the rubber ring 13 and the inner ring 1 of the bearing. In practical applications, the rotation direction of the baffle 7 can be selectively adjusted according to the duration of forward and reverse rotation of the bearing. For example, if forward rotation occurs more often, the rotation direction of the baffle 7 can be set to counterclockwise; if reverse rotation occurs more often, the rotation direction of the baffle 7 can be set to clockwise. The addition of dust baffle 8 further ensures that dust will not enter the raceway space and the interior of the inner ring 1, thereby improving the dustproof sealing performance of the bearing.

[0048] Furthermore, to facilitate the assembly and disassembly of the baffle 3, in this embodiment, the baffle 3 is configured as a split structure, which is divided into multiple plates in the circumferential direction, and the plates are detachably connected. Preferably, the baffle 3 is divided into two pieces of the same size, that is, it is divided into a left baffle 31 and a right baffle 32 that are symmetrical from left to right.

[0049] like Figure 7 As shown, the left baffle 31 has protrusions 5 at both ends where it connects with the right baffle 32. These protrusions 5 are cylindrical, extending in the same direction as the bearing's radial direction. Each protrusion 5 has a connecting hole penetrating its inner and outer walls (i.e., a penetrating hole is provided at the circular end faces of both ends of the protrusion 5). Simultaneously, the right baffle 32 has fixing grooves at both ends where it connects with the left baffle 31, each groove matching the protrusion 5. The inner and outer walls of these fixing grooves each have fixing holes 4 that match the connecting holes on the protrusion 5. The protrusion 5 is then engaged within the fixing groove, and bolts 6 are sequentially passed through the outer fixing hole 4, the connecting hole on the protrusion 5, and the inner fixing hole 4. The bolts 6 are connected to the fixing holes 4 by threaded engagement. During installation, the protrusion 5 is placed in the fixing groove, and the connecting hole on the protrusion 5 is aligned with the fixing holes 4 on both sides. Then, the bolt 6 is passed through the fixing hole 4 on the outside, the connecting hole on the protrusion 5 and the fixing hole 4 on the inside in sequence from the outside. The bolt 6 is connected to the fixing holes 4 on both sides by threaded engagement, thereby fixing the left baffle 31 and the right baffle 32.

[0050] The installation and operation process of this dustproof sealed bearing is briefly described below:

[0051] Installation process: First, place the sealing plate 12 against the end of the outer ring 2, positioning it within the first mounting groove 19. Align the through hole 14 with the threaded hole 17, and then screw the screw 15 into the through hole 14 and the threaded hole 17 to fix the sealing plate 12 onto the outer ring 2. At this time, the lower end face of the rubber ring 13 abuts against the inner ring 1, and the inner ring abuts against the baffle 3.

[0052] Then, align the protrusions 16 on the left baffle 31 and right baffle 32 with the connecting grooves 11 on the inner ring 1 and snap them into place. At the same time, place the protrusions 5 at the joint of the left baffle 31 and right baffle 32 into the fixing groove. Then, tighten the bolts 6 by passing them through the fixing holes 4 on the outside, the connecting holes on the protrusions 5 and the fixing holes 4 on the inside. The installation is now complete.

[0053] By following the steps described above, the dustproof components are installed sequentially at the top and bottom of the bearing, thereby obtaining the dustproof sealed bearing for the rocker arm of a coal mining machine according to the present invention.

[0054] During use, the two baffles 3 located at the top and bottom of the bearing rotate synchronously with the inner ring 1. The partitions 7 and multiple dust baffles 8 on the inner surface of the baffles 3 also rotate synchronously. When the rotation direction of the bearing is opposite to the direction of rotation of the vortex structure on the partition 7, the partition 7 and the multiple dust baffles 8 can push the dust on the surface of the sealing assembly towards the outer ring 2, gradually pushing the dust from the gap 81 to the outside, and finally discharging it from the dust outlet 71. When the rotation direction of the bearing is the same as the direction of rotation of the vortex structure on the partition 7, the dust will be blocked within the angle formed by the dust baffles 8 and the partition 7, preventing the dust from approaching the rubber ring 13 and the inner ring 1 of the bearing.

[0055] The dustproof sealing device for the rocker arm bearing of the coal mining machine shown in this embodiment improves the sealing performance between the inner ring 1 and the outer ring 2 of the bearing by setting dustproof components at the top and bottom of the bearing, and enables it to automatically clean dust. The dustproof components first initially block external dust by abutting against the sealing components of the inner ring 1 and the outer ring 2, preventing dust from entering the raceway space between the inner and outer rings. Furthermore, a baffle 3 is set outside the sealing components, and a vortex-structured partition 7 and a dust baffle 8 are provided on the inner surface of the baffle 3. During rotation, this allows the dust on the surface of the sealing components to be automatically pushed towards the outer ring 2 or collected within the angle formed by the dust baffle 8 and the partition 7, waiting to be discharged when the rotation direction changes. This effectively prevents dust from entering the raceway space or moving towards the inner ring 1, thus ensuring the normal operation of the bearing and extending its service life. Therefore, compared with traditional bearings, this dustproof sealed bearing has greatly improved dustproof sealing performance, and its overall structure is simple and low in manufacturing cost, effectively solving the problems of dust entering the bearing interior affecting its service life and requiring frequent maintenance.

[0056] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0059] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dustproof sealed bearing for a rocker arm of a coal mining machine, comprising an inner ring (1) and an outer ring (2) arranged concentrically, characterized in that, It also includes dustproof components respectively disposed on the end faces of the inner ring (1) and the outer ring (2); The dustproof assembly includes a sealing component and a baffle (3) arranged sequentially from the inside to the outside along the axial direction. The sealing assembly abuts against the inner ring (1) and the outer ring (2) on the side away from the baffle (3) to prevent external dust from entering the raceway space between the inner ring (1) and the outer ring (2); The inner surface of the baffle (3) is provided with a vortex-shaped partition (7) that is connected to the sealing assembly. The sealing assembly and the baffle (3) are respectively fixed to the outer ring (2) and the inner ring (1), and the two can rotate synchronously with the relative rotation between the inner ring (1) and the outer ring (2); When the rotation direction of the baffle (3) is opposite to that of the partition (7), the partition (7) can push the dust on the surface of the sealing assembly toward the outer ring (2).

2. The dustproof sealed bearing for a coal mining machine rocker arm as described in claim 1, characterized in that: The partition (7) is a continuous raised wall with a rectangular or outwardly inclined trapezoidal cross section, and the outermost spiral ring is the dust discharge port (71).

3. The dustproof sealed bearing for a coal mining machine rocker arm as described in claim 1, characterized in that: The sealing assembly includes a sealing plate (12) and a rubber ring (13); The sealing plate (12) is fixed to the end face of the outer ring (2); The outer ring of the rubber ring (13) is fixed to the radial inner side of the sealing plate (12), and its lower end face abuts against the inner ring (1), and its inner ring abuts against the baffle (3).

4. A dustproof sealed bearing for a coal mining machine rocker arm as described in claim 3, characterized in that: The outer ring (2) is provided with a first mounting groove (19) at its end, and a plurality of threaded holes (17) are provided at the bottom of the first mounting groove (19). The sealing plate (12) is provided with a plurality of through holes (14) that are adapted to the threaded hole (17), and screws (15) are screwed into the threaded hole (17) and the through holes (14).

5. A dustproof sealed bearing for a coal mining machine rocker arm as described in claim 1, characterized in that: The inner ring (1) is provided with a second mounting groove (18) at the end near the outer peripheral wall, and a connecting groove (11) is provided on the side wall of the second mounting groove (18). The inner peripheral wall of the baffle (3) is provided with a protrusion (16) that is adapted to the connecting groove (11), and the protrusion (16) is engaged with the connecting groove (11).

6. A dustproof sealed bearing for a coal mining machine rocker arm as described in claim 1, characterized in that: The baffle (3) is a split structure, which is divided into multiple plates in the circumferential direction, and the plates can be detachably connected.

7. A dustproof sealed bearing for a coal mining machine rocker arm as described in claim 6, characterized in that: The baffle (3) is divided into a left baffle (31) and a right baffle (32) that are symmetrical about left and right. Both ends of the left baffle (31) and the right baffle (32) are provided with protrusions (5), and the protrusions (5) are provided with connecting holes that penetrate their inner and outer walls; Both ends of the right baffle (32) and the left baffle (31) are provided with fixing grooves that are adapted to the protrusion (5), and fixing holes (4) that are adapted to the connecting hole are provided on the inner and outer walls of the fixing grooves. The protrusion (5) is engaged in the fixing groove, and the bolt (6) passes through the fixing hole (4) on the outside, the connecting hole and the fixing hole (4) on the inside in sequence. The bolt (6) and the fixing hole (4) are connected by threaded engagement.

8. A dustproof sealed bearing for a coal mining machine rocker arm as described in claim 1, characterized in that: It also includes a rolling assembly disposed between the inner ring (1) and the outer ring (2); The rolling assembly includes two retainers (9) and multiple balls (10). The two retainers (9) are arranged side by side along the axial direction in the raceway space formed by the inner ring (1) and the outer ring (2); Multiple balls (10) are rotatably housed in the raceway space formed by the inner ring (1) and the outer ring (2), and are evenly distributed circumferentially between the two retainers (9), and the spherical surface of each ball (10) abuts against the two retainers (9).

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