Sealing structure of single-ring bearing of drill bit

Abstract

The utility model relates to the field of bearings, and discloses a sealing structure of a single-ring bearing of a drill bit, which comprises a connecting shaft, a bearing body is fixedly connected outside the connecting shaft, a mounting sleeve is arranged outside the bearing body, and cover plates are movably connected to the upper part and the lower part of the right side of the mounting sleeve through bolts. A sealing sleeve is jointly arranged between the two cover plates, the sealing sleeve is movably connected with the connecting shaft, a sealing ring is jointly arranged between the two cover plates and the mounting sleeve, an auxiliary part is movably connected to the outer portion of the connecting shaft, a blocking part is movably connected to the left side of each cover plate and comprises a connecting ring, and the connecting ring is movably connected to the left side of the connecting shaft. And the connecting ring is fixedly connected with the cover plate. According to the utility model, the connecting shaft, the bearing, the mounting sleeve, the sealing sleeve, the cover plate, the blocking piece and the auxiliary piece are matched with one another, so that the sealing performance of the structure is ensured, meanwhile, extra friction is not generated when the connecting shaft rotates, and the structure is more practical.

Description

Technical Field

[0001] The utility model relates to the field of bearings, in particular to a sealing structure of a single-ring bearing for a drill bit. Background Art

[0002] The single-ring bearing for a drill bit is a key component used in drilling equipment, mainly used to support and reduce the friction of the drill bit during rotation. It is usually made of high-strength materials to withstand the high loads and wear generated during the drilling process. The sealing structure of the bearing is usually designed to prevent external contaminants such as dust, dirt, and moisture from entering the bearing interior while keeping the lubricant inside the bearing.

[0003] After retrieval, Chinese Patent Publication No.: CN216478507U discloses a bearing sealing device, which includes a main shaft and a bearing sleeved outside the main shaft. An installation sleeve is sleeved outside the bearing. Sealing retaining rings are evenly arranged in the installation sleeve. Pressure plates are symmetrically arranged on the right side of the sealing retaining rings. A sealing rubber pad is arranged at one end of the pressure plate close to the sealing retaining ring. Rubber strips are installed on one side of the two pressure plates close to the main shaft. Pressure plates are symmetrically arranged at the right end of the main shaft. A pressure strip with a wedge-shaped cross-section is arranged on the left side of the pressure plate. An inclined surface matching the pressure strip is arranged at the edge of the right end of the pressure plate. Connecting bolts threadedly connected to the installation sleeve are arranged through the edge of the pressure plate. The utility model can seal the bearing end and make the maintenance and replacement of the sealing parts more convenient in the later stage.

[0004] Although the above device seals the main shaft by surrounding it with a sealing ring composed of two rubber strips, and through the provided gas cavity, the rubber strips have a certain buffer space to avoid hard friction between the rubber strips and the surface of the main shaft. However, when the rubber strips come into contact with the rotating shaft and deform due to friction, gaps will be generated between the rubber ring and the main shaft, and external contamination is likely to enter the bearing through the gaps. Therefore, a sealing structure of a single-ring bearing for a drill bit is proposed to solve the above problems. Summary of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a sealing structure of a single-ring bearing for a drill bit, aiming to improve the problem that when the rubber strip contacts the rotating shaft and deforms due to friction, gaps will be generated between the rubber ring and the main shaft, and external contamination is likely to enter the bearing through the gaps in the prior art.

[0006] To achieve the above object, the utility model adopts the following technical scheme: A sealing structure for a single-ring bearing of a drill bit, including a connecting shaft, an outer portion of the connecting shaft is fixedly connected with a bearing body, an outer portion of the bearing body is provided with a mounting sleeve, upper and lower portions on the right side of the mounting sleeve are both movably connected with cover plates through bolts, a sealing sleeve is jointly arranged between the two cover plates, the sealing sleeve is movably connected with the connecting shaft, a sealing ring is jointly arranged between the two cover plates and the mounting sleeve, an auxiliary member is movably connected to an outer portion of the connecting shaft, a blocking member is movably connected to the left side of the cover plate, and the blocking member includes a connecting ring which is fixedly connected with the cover plate.

[0007] As a further description of the above technical scheme:

[0008] A slanting ring is fixedly connected to a side of the connecting ring close to the connecting shaft.

[0009] As a further description of the above technical scheme:

[0010] A convex ring is fixedly connected to a side of the slanting ring close to the connecting shaft.

[0011] As a further description of the above technical scheme:

[0012] The auxiliary member includes a circular ring, and a sleeve ring is fixedly connected to a side of the circular ring close to the convex ring.

[0013] As a further description of the above technical scheme:

[0014] A limiting ring is fixedly connected to a right portion of an inner wall of the mounting sleeve.

[0015] As a further description of the above technical scheme:

[0016] A snap ring is fixedly connected to the left side of the cover plate, a clamping groove is formed in the left side of the cover plate, and the connecting ring is clamped therein.

[0017] As a further description of the above technical scheme:

[0018] The sealing ring is located between the limiting ring and the snap ring.

[0019] As a further description of the above technical scheme:

[0020] A ring groove is formed in a middle portion of an outer wall of the sealing sleeve.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, through the mutual cooperation among the connecting shaft, the bearing, the mounting sleeve, the sealing sleeve, the cover plate, the blocking member and the auxiliary member, while ensuring the sealing performance of the structure, no additional friction is generated when the connecting shaft rotates, which is more practical.

[0023] 2. In the present utility model, through the mutual cooperation among the limiting ring, the clamping ring and the sealing ring, and through the cooperation between the annular groove and the cover plate, and the cooperation between the convex ring and the sleeve ring, the structure can provide multi-layer sealing protection for the bearing, effectively improving its sealing performance and being more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. is an overall three-dimensional structure diagram of a sealing structure of a single-ring bearing of a drill bit proposed by the present utility model;

[0025] Figure 2 FIG. is a sectional three-dimensional structure diagram of a sealing structure of a single-ring bearing of a drill bit proposed by the present utility model;

[0026] Figure 3 FIG. is an enlarged three-dimensional structure diagram of part A of a sealing structure of a single-ring bearing of a drill bit proposed by the present utility model;

[0027] Figure 4 FIG. is an enlarged three-dimensional structure diagram of part B of a sealing structure of a single-ring bearing of a drill bit proposed by the present utility model.

[0028] LEGEND DESCRIPTION:

[0029] 1. Connecting shaft; 2. Bearing; 3. Mounting sleeve; 4. Sealing sleeve; 5. Cover plate; 6. Blocking member; 7. Auxiliary member; 8. Sealing ring; 61. Connecting ring; 62. Inclined ring; 63. Convex ring; 71. Circular ring; 72. Sleeve ring; 31. Limiting ring; 51. Clamping ring; 52. Card slot; 41. Annular groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] Refer to Figure 1 - Figure 2, an embodiment provided by the present utility model: a sealing structure for a single-ring bearing of a drill bit, including a connecting shaft 1 for connecting the bearing. An outer part of the connecting shaft 1 is fixedly connected with a bearing body 2, which is a grease-lubricated bearing. An outer part of the bearing body 2 is provided with a mounting sleeve 3 for fitting the installation between the sealing structure and the bearing body 2. Upper and lower parts on the right side of the mounting sleeve 3 are both movably connected with cover plates 5 through bolts. The cover plates 5 are semi-circular. A sealing sleeve 4 is jointly arranged between the two cover plates 5 for sealing between the cover plates 5 and the connecting shaft 1. The sealing sleeve 4 is movably connected with the connecting shaft 1 and is provided with a positioning member for limiting its position. A ring groove 41 is formed in a middle part of an outer wall of the sealing sleeve 4 for fitting the sealing between the cover plates 5. The cover plates 5 and the sealing sleeve 4 do not directly contact each other. There is a gap of about 0.2 mm between an inner wall of the ring groove 41 and the cover plates 5. A sealing ring 8 is jointly arranged between the cover plates 5 and the mounting sleeve 3. An auxiliary member 7 is movably connected to an outer part of the connecting shaft 1 for cooperating with a blocking member 6 to prevent external pollution from entering the bearing. A blocking member 6 is movably connected to a left side of the cover plate 5. There is also a gap of about 0.2 mm between the auxiliary member 7 and the blocking member 6, which can ensure the sealing performance while preventing friction and preventing external pollution from entering the bearing.

[0032] As Figure 2 - Figure 4 shown, the blocking member 6 includes a connecting ring 61, whose cross-section is similar to an L shape, which can block between an outer ring and an inner ring of the bearing. It is clamped with an outer ring of the bearing body 2, and a groove adapted to it is formed in the outer ring of the bearing body 2. There is a gap of about 0.1 mm between it and an inner ring of the bearing body 2. The connecting ring 61 is fixedly connected with the cover plate 5. A slanting ring 62 is fixedly connected to a side of the connecting ring 61 close to the connecting shaft 1 for cooperating with a connecting convex ring 63. A convex ring 63 is fixedly connected to a side of the slanting ring 62 close to the connecting shaft 1, which cooperates with a sleeve ring 72 for blocking pollution.

[0033] Furthermore, the auxiliary member 7 includes a circular ring 71, which is fixed to the connecting shaft 1 through an existing limiting structure such as a circlip for facilitating the disassembly and replacement of the sealing structure in the later stage. A sleeve ring 72 is fixedly connected to a side of the circular ring 71 close to the convex ring 63. The sleeve ring 72 is arc-shaped and is adapted to the convex ring 63.

[0034] Furthermore, a limiting ring 31 is fixedly connected to the right part of the inner wall of the mounting sleeve 3 for cooperating with the installation of the sealing ring 8. A clamping ring 51 is fixedly connected to the left side of the cover plate 5. A slope is arranged on the side close to the limiting ring 31, and an annular cavity with a wider left side and a narrower right side can be formed between it and the limiting ring 31. Thus, while fixing the sealing ring 8, it can be extruded, so that it completely seals the space between the limiting ring 31 and the clamping ring 51 to improve the sealing performance. A clamping groove 52 is formed on the left side of the cover plate 5 for cooperating with the connection of the connecting ring 61. The connecting ring 61 is clamped with it. The sealing ring 8 is located between the limiting ring 31 and the clamping ring 51. It is made of rubber material and has a certain deformation ability. It is a circular ring body.

[0035] Working principle: When installing the sealing structure, first install the blocking member 6. The left end of the connecting ring 61 is clamped into the groove formed on the outer ring of the bearing body 2 to initially fix the position of the blocking member 6. Then, the circular ring 71 on the auxiliary member 7 is limited and fixed by a circlip or other existing limiting structures, so that the auxiliary member 7 is fixed to the connecting shaft 1. At this time, the convex ring 63 on the blocking member 6 will be located inside the sleeve ring 72 of the auxiliary member 7, and there is a certain gap between the blocking member 6 and the auxiliary member 7. Then, fix the sealing sleeve 4 to the connecting shaft 1. Install the sealing ring 8 on the right side of the limiting ring 31. Then insert the two cover plates 5 into the annular groove 41 respectively, so that the connecting ring 61 is clamped into the clamping groove 52. Then fix the cover plate 5 to the mounting sleeve 3 through bolts. At this time, there is also a certain gap between the cover plate 5 and the annular groove 41. Since the cover plate 5 is fixed to the mounting sleeve 3, at this time, the clamping ring 51 will cooperate with the limiting ring 31 to clamp the sealing ring 8. And because a slope is arranged on the side of the clamping ring 51 close to the limiting ring 31, when the cover plate 5 approaches and is fixed to the mounting sleeve 3, the clamping ring 51 will extrude the sealing ring 8. And because the sealing ring 8 is made of rubber material and has a certain deformation ability, after being extruded, it will fill the gap between the limiting ring 31 and the clamping ring 51, thus enhancing the sealing performance of the sealing structure. At this time, the installation of the bearing sealing structure can be completed.

[0036] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing structure for a single-ring bearing of a drill bit, comprising a connecting shaft (1), characterized in that: The outer part of the connecting shaft (1) is fixedly connected with a bearing body (2). An installation sleeve (3) is arranged outside the bearing body (2). The upper and lower parts on the right side of the installation sleeve (3) are both movably connected with cover plates (5) through bolts. A sealing sleeve (4) is jointly arranged between the two cover plates (5). The sealing sleeve (4) is movably connected with the connecting shaft (1). A sealing ring (8) is jointly arranged between the two cover plates (5) and the installation sleeve (3). An auxiliary part (7) is movably connected to the outer part of the connecting shaft (1). A blocking part (6) is movably connected to the left side of the cover plate (5). The blocking part (6) includes a connecting ring (61), and the connecting ring (61) is fixedly connected with the cover plate (5).

2. The sealing structure of a single-ring bearing of a drill bit according to claim 1, characterized in that: One side of the connecting ring (61) close to the connecting shaft (1) is fixedly connected with an inclined ring (62).

3. The sealing structure of a single-ring bearing of a drill bit according to claim 2, characterized in that: One side of the inclined ring (62) close to the connecting shaft (1) is fixedly connected with a convex ring (63).

4. The sealing structure of a single-ring bearing of a drill bit according to claim 3, characterized in that: The auxiliary part (7) includes a circular ring (71), and one side of the circular ring (71) close to the convex ring (63) is fixedly connected with a sleeve ring (72).

5. The sealing structure of a single-ring bearing for a drill bit according to claim 1, characterized in that: A limiting ring (31) is fixedly connected to the right part of the inner wall of the installation sleeve (3).

6. The sealing structure of a single-ring bearing for a drill bit according to claim 5, characterized in that: A snap ring (51) is fixedly connected to the left side of the cover plate (5). A clamping groove (52) is formed on the left side of the cover plate (5), and the connecting ring (61) is clamped therein.

7. The sealing structure of a single-ring bearing of a drill bit according to claim 6, characterized in that: The sealing ring (8) is located between the limiting ring (31) and the snap ring (51).

8. The sealing structure of a single-ring bearing of a drill bit according to claim 1, characterized in that: A ring groove (41) is formed in the middle of the outer wall of the sealing sleeve (4).

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