Drilling machine gearbox bearing sleeve water shielding structure

Abstract

The utility model relates to a drilling machine gearbox bearing sleeve water shielding structure, and belongs to the technical field of drilling machine parts. Comprising a gearbox output shaft; the outer surface of the upper end of the gearbox output shaft is sleeved with a bearing outer sleeve, and a bearing is installed on an inner bearing position of the bearing outer sleeve. An output shaft of the gear box is sleeved and matched with the bearing; the upper end of the bearing outer sleeve is correspondingly provided with a water shielding gland, and the water shielding gland is arranged on the gear box output shaft in a sleeving mode and moves along with the gear box output shaft. A lower convex edge is arranged at the lower end of the upper outer edge of the water-shielding gland; an upper convex edge is arranged on the upper end surface of the bearing outer sleeve corresponding to the inner side of the lower convex edge; and the gearbox output shaft on the upper side of the water shielding gland is in threaded connection with a locking nut. Through the arrangement of the water shielding gland, the effect of preventing leaked water from permeating into the gear box can be achieved, and it is guaranteed that lubricating oil in the gear box is not polluted.

Description

Technical Field

[0001] The utility model relates to a water shielding structure for a bearing sleeve of a gear box of a drilling rig, and belongs to the technical field of drilling rig parts. Background Art

[0002] Drilling rigs for water wells, exploration drilling, and other engineering applications have a power head. The main component of the power head is a gearbox, which has an input shaft and an output shaft. Both the input and output shafts are mounted within the gearbox housing via bearings, specifically bearing sleeves. The output shaft is hollow in the axial direction, and a faucet is attached to the upper end of the output shaft to inject water into the drill pipe. The drill pipe requires watering during operation.

[0003] During use, especially after prolonged use, the connection between the output shaft and the faucet may leak, leading to water leakage. Existing structures are not waterproof, and leaking water is very likely to seep into the gearbox through the gaps. The gears are lubricated internally. If water enters the gearbox, it can affect the components within and affect its normal operation. Utility Model Content

[0004] The purpose of the utility model is to provide a water shielding structure for a bearing sleeve of a drilling rig gear box to solve the above problem and prevent water from entering the gear box after leakage.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A drilling rig gearbox bearing sleeve water-shielding structure includes a gearbox output shaft; a bearing sleeve is sleeved on the upper end outer surface of the gearbox output shaft, and a bearing is installed on the internal bearing position of the bearing sleeve; the gearbox output shaft cooperates with the bearing sleeve; a water-shielding pressure cover is correspondingly provided on the upper end of the bearing sleeve, and the water-shielding pressure cover is sleeved on the gearbox output shaft and moves with the gearbox output shaft; a lower convex edge is provided on the lower end of the outer edge of the upper part of the water-shielding pressure cover; an upper convex edge is provided on the upper end surface of the bearing sleeve corresponding to the inner side of the lower convex edge; a locking nut is threadedly connected to the gearbox output shaft on the upper side of the water-shielding pressure cover.

[0007] A further improvement of the technical solution of the present utility model is that a rubber sealing ring is provided on the inner hole surface where the water shielding cover cooperates with the output shaft of the gear box.

[0008] A further improvement of the technical solution of the present utility model is that the water-shielding pressure cover comprises a flange edge and a cover body, and an oil seal is sleevedly arranged between the cover body and the bearing outer sleeve.

[0009] A further improvement of the technical solution of the present utility model is that two locking nuts are provided.

[0010] A further improvement of the technical solution of the present utility model is that two bearings are provided.

[0011] Due to the adoption of the above technical solution, the technical effects achieved by the utility model are as follows:

[0012] The utility model is provided with a water shielding cover at the upper end of the bearing sleeve, and by providing the water shielding cover, water can be dripped onto the water shielding cover in case of water leakage. The water shielding cover can throw off the water as the output shaft of the gear box rotates.

[0013] The utility model provides a lower convex edge on the underside of the upper outer edge of the water-shielding gland. Simultaneously, an upper convex edge is provided on the upper end surface of the bearing housing, corresponding to the lower convex edge. The upper and lower convex edges form a waterproof structure. When water falls onto the water-shielding gland or the bearing housing, this structure prevents water from leaking into the gearbox.

[0014] The utility model can prevent water leakage from penetrating into the gear box, prevent the water leakage from contaminating the lubricating oil in the gear box, and ensure the normal operation of the gear box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the main view of the utility model;

[0016] Figure 2 It is an AA sectional view of the main view of the present utility model;

[0017] Figure 3 yes Figure 2 An enlarged schematic diagram of point B in FIG.

[0018] Figure 4 It is an explosion diagram of the utility model;

[0019] Among them, 1. bearing sleeve, 2. gearbox output shaft, 3. bearing, 4. oil seal, 5. water pressure cover, 6. locking nut, 7. rubber sealing ring, 8. lower convex edge, 9. upper convex edge. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0022] The utility model relates to a water shielding structure for a bearing sleeve of a drilling rig gear box, which is a water shielding structure for a gear box output shaft on a power head of an engineering drilling rig and can prevent water from seeping into the gear box when the gear box output shaft leaks.

[0023] like Figure 1 、 Figure 2 As shown, the structure is based on the gearbox output shaft 2, and thus includes the gearbox output shaft 2, which is an axially hollow structure, and water flows through the gearbox output shaft 2. The upper end of the gearbox output shaft 2 is connected to the faucet, and this connection position may cause water leakage.

[0024] like Figure 2 、 Figure 3 As shown, the structure includes a bearing sleeve 1 mounted on the upper end of the gearbox output shaft 2. The bearing sleeve 1 has a central through-hole and is mounted on the outer surface of the gearbox output shaft 2. A bearing seat is provided within the central through-hole of the bearing sleeve 1, and a bearing 3 is mounted on the bearing seat. The gearbox output shaft 2 and the bearing sleeve mate with each other, and the bearings 3 ensure smooth rotation of the gearbox output shaft 2. Preferably, two bearings 3 are provided.

[0025] like Figure 2 、 Figure 3 、 Figure 4 As shown, a water shielding cap 5 is mounted on the upper end of the bearing housing 1. This cap 5 serves to shield water. It fits snugly over the gearbox output shaft 2 and rotates with the gearbox output shaft 2. If water drips onto the cap, it is shaken off during its rotation.

[0026] A lower flange 8 is provided at the lower end of the outer edge of the upper portion of the water-shielding gland 5. An upper flange 9 is provided on the upper end surface of the bearing housing 1, corresponding to the inner side of the lower flange 8. A waterproof structure is formed between the lower flange 8 and the upper flange 9, further preventing water from seeping in. Furthermore, a radially outward protrusion is provided on the upper outer edge of the upper flange 9, with a gap between the protrusion and the inner edge of the lower flange 8.

[0027] In the specific implementation of this utility model, a locking nut 6 is also required on the upper side of the water-shielding pressure cover 5 to lock the water-shielding pressure cover 5. Correspondingly, an external thread is provided on the upper surface of the gearbox output shaft 2. The locking nut 6 is threadedly mounted on the gearbox output shaft 2. Preferably, two locking nuts 6 are provided to ensure reliability.

[0028] In the present invention, a sealing ring groove is further provided on the inner hole surface where the water shielding cover 5 and the gearbox output shaft 2 meet, and a rubber sealing ring 7 is installed in the sealing ring groove. The rubber sealing ring 7 seals the mating surface between the water shielding cover 5 and the gearbox output shaft 2. The rubber sealing ring 7 is provided at this position to prevent water from seeping in from this position, and also to prevent water from entering the bearing position from this position. Because the bearings on the bearing position also need lubrication.

[0029] As shown in Figure 3, in a specific implementation, the water pressure cover 5 has an integral flange and a cover body, with a lower convex edge 8 provided on the flange. An oil seal 4 is provided on the outer surface of the cover body between the cover body and the bearing sleeve 1.

[0030] The utility model can prevent water leakage from seeping into the gear box by arranging the water-shielding pressure cover, thereby ensuring that the lubricating oil in the gear box is not contaminated.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A water shielding structure for a gearbox bearing sleeve of a drilling rig, comprising a gearbox output shaft (2); characterized in that: The outer surface of the upper end of the gearbox output shaft (2) is sleeved with a bearing sleeve (1), and a bearing (3) is installed on the inner bearing position of the bearing sleeve (1); the gearbox output shaft (2) and the bearing (3) are sleeved together; a water-shielding pressure cover (5) is correspondingly provided on the upper end of the bearing sleeve (1), and the water-shielding pressure cover (5) is sleeved on the gearbox output shaft (2) and moves with the gearbox output shaft (2); a lower convex edge (8) is provided on the lower end of the outer edge of the upper part of the water-shielding pressure cover (5); an upper convex edge (9) is provided on the upper end surface of the bearing sleeve (1) corresponding to the inner side of the lower convex edge (8); a locking nut (6) is threadedly connected to the gearbox output shaft (2) on the upper side of the water-shielding pressure cover (5).

2. The drilling rig gearbox bearing sleeve water shielding structure according to claim 1, characterized in that: A rubber sealing ring (7) is provided on the inner hole surface of the water-shielding pressure cover (5) that cooperates with the gear box output shaft (2).

3. The drilling rig gearbox bearing sleeve water shielding structure according to claim 1, characterized in that: The water pressure cover (5) comprises a flange edge and a cover body, and an oil seal (4) is sleeved between the cover body and the bearing sleeve (1).

4. The drilling rig gearbox bearing sleeve water shielding structure according to any one of claims 1 to 3, characterized in that: Two locking nuts (6) are provided.

5. The drilling rig gearbox bearing sleeve water shielding structure according to any one of claims 1 to 3, characterized in that: Two bearings (3) are provided.

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