Double-edged hob graphene bearing mounting structure

Abstract

The utility model discloses a double-edged hob graphene bearing mounting structure which comprises a hob shaft, two hob hubs are sleeved outside the hob shaft, a plurality of groups of graphite copper bushes are sleeved on the hob shaft and are inserted into the inner sides of the hob hubs, lubricating oil is filled between the graphite copper bushes and the hob shaft, a spacer is arranged in the middle of the hob shaft, and the two groups of graphite copper bushes are separated by the spacer. The two ends of the cutter shaft are sleeved with end covers used for sealing. According to the double-edged hob graphene bearing mounting structure, the graphite copper sleeve is used for replacing a common bearing, and a lubricating oil way is arranged, so that abrasion can be reduced to a great extent, and the service life of a cutter is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machine cutters, in particular to a double-edged hob graphene bearing mounting structure. Background Art

[0002] The double-edged hob of a shield machine is a key component in the tool system of a shield machine. It is mainly composed of a cutter ring, a cutter body, bearings, a sealing device and other parts. The cutter ring is the part that directly contacts the rock and soil and breaks the rock. It is usually made of high-strength alloy steel and has the characteristics of high hardness and high wear resistance. The cutter body is a structural component that supports the cutter ring, providing a stable installation foundation for the cutter ring, and its interior is designed with space to accommodate components such as bearings. The bearing can ensure that the cutter ring can rotate flexibly on the cutter body, reduce friction, and make the hob roll more smoothly during the rock breaking process. The function of the sealing device is to prevent external impurities such as mud, water, sand and other impurities from entering the inside of the hob, protect key components such as bearings, and ensure the normal service life of the hob;

[0003] If ordinary bearings are used, if the lubrication is poor or the load is too large, the wear rate between the balls or rollers and the inner and outer rings of the ordinary bearings will accelerate, resulting in a shorter service life. Utility Model Content

[0004] The purpose of the present utility model is to provide a double-edged hob graphene bearing installation structure to solve the problem of easy wear of bearings proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-edged hob graphene bearing mounting structure, comprising a cutter shaft, two cutter hubs are sleeved on the outside of the cutter shaft, a cutter ring is arranged outside the cutter hub, multiple groups of graphite copper sleeves are sleeved on the cutter shaft and the graphite copper sleeves are inserted on the inner side of the cutter hub, lubricating oil is filled between the graphite copper sleeves and the cutter shaft, a spacer is provided in the middle of the cutter shaft, the spacer separates the two groups of graphite copper sleeves, end covers for sealing are provided at both ends of the cutter shaft, each group of graphite copper sleeves includes two symmetrically arranged graphite copper sleeves, a plurality of annularly evenly distributed oil drain grooves are provided at the end of the graphite copper sleeve, and a spiral oil inlet groove is provided inside the graphite copper sleeve.

[0006] Preferably, an oil passage 2 is provided at the axis center of the cutter shaft, the oil passage 2 is connected to the oil passage 3 in the radial direction of the cutter shaft, and the oil passage 3 is communicated with the gap between the graphite copper sleeve and the cutter shaft.

[0007] Preferably, a through-type oil passage 1 is provided in the cutter hub, the oil passage 1 is connected to the oil drain groove, both ends of the oil passage 1 are sealed by oil plugs on the end cover, and a plurality of floating seals are provided in the oil passage 1, and the floating seals are respectively located in the gap between the end cover and the cutter hub and in the gap between the two cutter hubs.

[0008] Preferably, a valve core, a limit cover and a buckle are sequentially connected at the second port of the oil channel.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0010] The utility model discloses a double-edged hob graphene bearing mounting structure, which can greatly reduce wear and extend the service life of the tool by replacing ordinary bearings with graphite copper sleeves and providing lubricating oil circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A cross-sectional view of the utility model as a whole;

[0012] Figure 2 This is a schematic diagram of the knife shaft structure in the utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the graphite copper sleeve in this utility model.

[0014] In the figure: 1. Cutter shaft; 2. Graphite copper sleeve; 3. Cutter hub; 4. Cutter ring; 5. End cover; 6. Oil inlet nozzle; 7. Oil channel 1; 8. Floating seal; 9. Oil drain groove; 10. Oil inlet groove; 11. Spacer; 12. Oil channel 2; 13. Oil channel 3. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] See also Figure 1-3 A double-edged hob graphene bearing mounting structure includes a cutter shaft 1, two cutter hubs 3 are sleeved on the outside of the cutter shaft 1, and a cutter ring 4 is mounted on the outside of the cutter hubs 3. Multiple groups of graphite copper sleeves 2 are sleeved on the cutter shaft 1 and inserted into the inside of the cutter hubs 3. Lubricating oil is filled between the graphite copper sleeves 2 and the cutter shaft 1. A spacer 11 is provided in the middle of the cutter shaft 1, separating the two groups of graphite copper sleeves 2. End caps 5 are provided at both ends of the cutter shaft 1 for sealing. Each group of graphite copper sleeves 2 includes two symmetrically arranged graphite copper sleeves 2. Multiple annular oil drain grooves 9 are provided at the ends of the graphite copper sleeves 2, and a spiral oil inlet groove 10 is provided inside the graphite copper sleeves 2.

[0017] An oil channel 2 12 is provided at the axis of the cutter shaft 1. The oil channel 2 12 is connected to the oil channel 3 13 in the radial direction of the cutter shaft 1. The oil channel 3 13 is connected to the gap between the graphite copper sleeve 2 and the cutter shaft 1. The valve core, limit cover and buckle are sequentially inserted at the end of the oil channel 2 12.

[0018] A through-type oil passage 7 is provided in the cutter hub 3. The oil passage 7 is connected to the oil drain groove 9. Both ends of the oil passage 7 are sealed by oil plugs 6 on the end cover 5. Multiple floating seals 8 are provided in the oil passage 7. The floating seals 8 are located in the gap between the end cover 5 and the cutter hub 3 and in the gap between the two cutter hubs 3. The floating seals 8 are used to prevent lubricating oil from escaping from the gap.

[0019] Working principle: The utility model is a double-edged hob graphene bearing installation structure. When in use, the lubricating oil enters from the oil channel 2 12, then enters the oil inlet groove 10 from the oil channel 3 13 and is discharged from the oil discharge groove 9 into the oil channel 1 7. The lubricating oil can effectively reduce the wear of the graphite copper sleeve 2. The graphite copper sleeve 2 itself also has a good lubricating effect. Since graphite has a layered crystal structure and the bonding force between layers is weak, during the friction process, the graphite can easily form a lubricating film on the surface, thereby reducing the friction coefficient.

Claims

1. A double-edged hob graphene bearing mounting structure, comprising a cutter shaft (1), characterized in that: Two blade hubs (3) are sleeved on the outside of the blade shaft (1), and a blade ring (4) is sleeved on the outer surface of the blade hub (3). A plurality of graphite copper sleeves (2) are sleeved on the blade shaft (1), and the graphite copper sleeves (2) are inserted into the inner side of the blade hub (3). Lubricating oil is filled between the graphite copper sleeves (2) and the blade shaft (1). A spacer (11) is provided in the middle of the blade shaft (1), and the spacer (11) separates the two groups of graphite copper sleeves (2). End covers (5) for sealing are sleeved on both ends of the blade shaft (1), and each group of graphite copper sleeves (2) includes two symmetrically arranged graphite copper sleeves (2). A plurality of annular evenly distributed oil drain grooves (9) are provided at the end of the graphite copper sleeve (2), and a spiral oil inlet groove (10) is provided inside the graphite copper sleeve (2).

2. The double-edged hob graphene bearing mounting structure according to claim 1, characterized in that: An oil passage 2 (12) is provided at the axis center of the knife shaft (1), and the oil passage 2 (12) is connected to an oil passage 3 (13) in the radial direction of the knife shaft (1), and the oil passage 3 (13) is communicated with the gap between the graphite copper sleeve (2) and the knife shaft (1).

3. The double-edged hob graphene bearing mounting structure according to claim 2, characterized in that: A through-type oil passage (7) is provided in the cutter hub (3), the oil passage (7) is communicated with the oil drain groove (9), both ends of the oil passage (7) are blocked by oil plugs (6) on the end cover (5), and a plurality of floating seals (8) are provided in the oil passage (7), the floating seals (8) are respectively located at the gap between the end cover (5) and the cutter hub (3) and at the gap between the two cutter hubs (3).

4. The double-edged hob graphene bearing mounting structure according to claim 3, characterized in that: The valve core, limit cover and buckle are sequentially connected to the port of oil channel 2 (12).

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