Oil storage structure for sliding bearing of guide drill bit

Abstract

The utility model relates to the technical field of engineering machinery, and discloses a guide bit sliding bearing oil storage structure which comprises a bit leg, a bit leg shaft and a wheel body, a plurality of alloy teeth are fixedly connected to the wheel body, a plurality of steel balls are arranged between the wheel body and the bit leg shaft, an oil storage bag is fixedly connected to the inner side of the bit leg, and an oil through hole is formed in the inner side of the bit leg. Due to the fact that the first oil storage annular groove and the second oil storage annular groove are formed in the tooth palm shaft, the space between the tooth palm shaft and the wheel body is enlarged due to the fact that the first oil storage annular groove and the second oil storage annular groove are additionally formed in the lower portion of the stress face of the tooth palm shaft, and the oil storage space is enlarged on the original basis. Meanwhile, after the grease is used up, the contact area between the shaft and the wheel body is reduced, so that the abrasion coefficient is reduced, the heat productivity is reduced, the heat productivity of the drill bit is reduced, the service life of a bearing sealing ring is prolonged, and the service life of the drill bit is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to an oil storage structure for a guide drill bit sliding bearing. Background Art

[0002] The guide drill bit is a commonly used tool in the process of reverse well construction. It is also a rock-breaking tool with high efficiency and adaptability. The main structure is composed of a wheel body and shaft, steel balls, alloy teeth, sealing rings, oil storage bags and other components. It is mainly used for guide hole excavation in the construction process of vertical shafts, inclined shafts, pressure-regulating shafts, ventilation shafts and escape shafts. It can be widely used in underground engineering construction fields such as mining, hydropower, and transportation. The working principle is that the motor drives the hydraulic motor, and uses hydraulic power to transmit torque to the drilling tool system, driving the drill tool to rotate and drill downward. Under the action of drilling pressure, the drill bit impacts, squeezes and shears the rock to break it, and finally drills through the guide hole, and then a reverse well construction is carried out.

[0003] The design of the guide drill bit adopts a sliding bearing structure. The sliding bearing structure drill bit is subjected to complex forces during operation. In addition to bearing large loads of thrust, torque, and shear force, it also has to withstand instantaneous shock caused by soft rock. During the operation of the drill bit, the alloy teeth on the cone cut chips with the rock, generating a large amount of heat. The heat is gradually transferred to the inside of the drill bit bearing, causing the inside of the drill bit bearing to heat up quickly, accelerating the aging of the seal ring, causing the seal ring to fail, and ultimately causing the bearing to fail and shortening the life of the drill bit. In order to increase the service life of the drill bit bearing, the market has increased the amount of grease inside the bearing by adding grease and oil storage capsules to increase the amount of grease inside the bearing so as to reduce the heat generated by the bearing during the operation of the drill bit by lubricating grease, so as to increase the service life of the drill bit. However, the grease storage capacity inside the drill bit is limited, and the bearing of the drill bit is prone to heat generation. Therefore, a guide drill bit sliding bearing oil storage structure is proposed to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The utility model aims to solve the problem that the grease storage capacity inside the drill bit is limited and the bearing of the drill bit is easy to generate heat, and proposes an oil storage structure for the sliding bearing of the guide drill bit.

[0006] (II) Technical solution

[0007] The technical solution of the utility model to solve the above technical problems is as follows:

[0008] A guide drill bit sliding bearing oil storage structure comprises a palm, a palm shaft and a wheel body, a plurality of alloy teeth are fixedly connected to the wheel body, a plurality of steel balls are arranged between the wheel body and the palm shaft, an oil storage bag is fixedly connected to the inner side of the palm, an oil through hole is provided on the inner side of the palm, a plug pin hole connected to the oil through hole is provided on the palm shaft, a first oil storage annular groove and a second oil storage annular groove are provided on the palm shaft, and two wear-resistant alloys are arranged on the palm shaft.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Preferably, the width range of the first oil storage annular groove and the second oil storage annular groove is 5mm-25mm, and the depth range is 0.2-2.5mm. The first oil storage annular groove and the second oil storage annular groove are distributed at 240° on the outside of the tooth palm axis, and the wear-resistant alloy is distributed at 120° on the outside of the tooth palm axis.

[0011] (III) Beneficial effects

[0012] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0013] The utility model provides a first oil storage annular groove and a second oil storage annular groove. The lower part of the force bearing surface of the tooth palm shaft increases the space with the wheel body due to the addition of the first oil storage annular groove and the second oil storage annular groove, thereby increasing the oil storage space on the original basis, which is more conducive to the storage of grease. At the same time, after the grease is used up, the contact area between the shaft and the wheel body is reduced, thereby reducing the wear coefficient and the heat generation, reducing the heat generation of the drill head, extending the service life of the bearing sealing ring, and thus improving the service life of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic structural diagram of the relative position relationship between the tooth palm shaft and the first oil storage annular groove of the utility model;

[0016] Figure 3 This is a schematic diagram of the first oil storage annular groove and the wear-resistant alloy structure of the utility model.

[0017] In the figure: 1. tooth palm; 2. tooth palm shaft; 3. wheel body; 4. alloy teeth; 5. steel balls; 6. oil storage bag; 7. oil through hole; 8. plug pin hole; 9. first oil storage annular groove; 10. second oil storage annular groove; 11. wear-resistant alloy. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the embodiment, Figure 1-3 Provided is an oil storage structure for a guide drill bit sliding bearing, comprising a tooth palm 1, a tooth palm shaft 2 and a wheel body 3, a plurality of alloy teeth 4 being fixedly connected to the wheel body 3, a plurality of steel balls 5 being arranged between the wheel body 3 and the tooth palm shaft 2, an oil storage bag 6 being fixedly connected to the inner side of the tooth palm 1, an oil through hole 7 being provided on the inner side of the tooth palm 1, a plug pin hole 8 connected to the oil through hole 7 being provided on the tooth palm shaft 2, a first oil storage annular groove 9 and a second oil storage annular groove 10 being provided on the tooth palm shaft 2, and two wear-resistant alloys 11 being arranged on the tooth palm shaft 2.

[0020] Through the above arrangement, under normal circumstances, the lubricating oil in the oil storage bag 6 enters between the tooth palm shaft 2 and the wheel body 3 through the oil through hole 7 and the pin hole 8 and then through the steel ball 5, and finally flows into between the first oil storage annular groove 9 and the second oil storage annular groove 10. The lower part of the force surface of the tooth palm shaft 2 increases the space with the wheel body due to the addition of the first oil storage annular groove 9 and the second oil storage annular groove 10, and the oil storage space is increased on the original basis, which is more conducive to the storage of grease. At the same time, after the grease is used up, the contact area between the shaft and the wheel body is reduced, thereby reducing the wear coefficient and the heat generation, so that the heat generation of the drill head is reduced, the service life of the bearing seal ring is extended, and the service life of the drill bit is improved.

[0021] Reference Figure 1-3 , wherein the width of the first oil storage annular groove 9 and the second oil storage annular groove 10 ranges from 5mm to 25mm, and the depth ranges from 0.2 to 2.5mm, the first oil storage annular groove 9 and the second oil storage annular groove 10 are distributed at 240° on the outside of the tooth palm shaft 2, and the wear-resistant alloy 11 is distributed at 120° on the outside of the tooth palm shaft 2;

[0022] Through the above-mentioned structural setting, the width range of the first oil storage annular groove 9 and the second oil storage annular groove 10 is 5mm-25mm, and the depth range is 0.2-2.5mm, so as to adapt to the guide drill bit size range of 6-18 inches. The wear-resistant alloy 11 is welded on the annular groove of the bearing surface within a 120-degree range of the center of the shaft diameter to ensure the strength of the bearing surface of the palm shaft 2.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A guide drill bit sliding bearing oil storage structure, comprising a tooth palm (1), a tooth palm shaft (2) and a wheel body (3), a plurality of alloy teeth (4) being fixedly connected to the wheel body (3), a plurality of steel balls (5) being arranged between the wheel body (3) and the tooth palm shaft (2), an oil storage bag (6) being fixedly connected to the inner side of the tooth palm (1), an oil through hole (7) being provided on the inner side of the tooth palm (1), and a plug pin hole (8) being provided on the tooth palm shaft (2) and being connected to the oil through hole (7), characterized in that: A first oil storage annular groove (9) and a second oil storage annular groove (10) are provided on the tooth palm shaft (2), and two wear-resistant alloys (11) are provided on the tooth palm shaft (2).

2. The guide drill bit sliding bearing oil storage structure according to claim 1, characterized in that: The width of the first oil storage annular groove (9) and the second oil storage annular groove (10) ranges from 5 mm to 25 mm, and the depth ranges from 0.2 mm to 2.5 mm. The first oil storage annular groove (9) and the second oil storage annular groove (10) are distributed at an angle of 240 degrees on the outside of the tooth palm shaft (2), and the wear-resistant alloy (11) is distributed at an angle of 120 degrees on the outside of the tooth palm shaft (2).

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