Cutter head bearing of shield tunneling machine

Abstract

The utility model provides a cutter head bearing of a shield tunneling machine, and relates to the field of bearings. The oil injection port is installed in the oil injection hole, the sealing ring structure of a circular ring structure is arranged outside the insertion head structure, the section of the sealing ring structure made of flexible rubber is of a triangular structure, an inner hole is formed in the insertion head structure, the outer end of the inner hole is of a horn-shaped structure, and the inner end of the inner hole is of a T-shaped shaft structure. After the oil injection port is used, the outer plate structure, the push plate structure and the insertion head structure are controlled to move together, the insertion head structure is inserted into the oil injection port to block the oil injection port, meanwhile, the outer plate structure and the push plate structure are continuously stressed to extrude the sealing ring structure, the sealing ring structure is pressed and sealed, the sealing strength is improved, and backflow lubricating oil leakage is avoided; according to the cutter head bearing of the common shield tunneling machine, the problem that after oil is injected into an oil injection port of the bearing, some residual lubricating oil is prone to backflow, and leakage of the lubricating oil is prone to occurring is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a cutter head bearing of a shield machine. Background Art

[0002] The cutter head bearing of a shield machine is an important component of the shield machine. Its function is similar to the "palm center" in the "palm". It plays a key role in the function of the shield machine. Specifically, the drive system of the cutter head of the shield machine can be compared to the "palm", while the main bearing is equivalent to the "palm center". It is the only core key component that has not been domesticated in the shield machine. The main function of the cutter head bearing of the shield machine is to support the mechanical rotating body, reduce the friction coefficient during the movement process, and ensure the rotation accuracy. The cutter head bearing of the shield machine, also known as the main bearing, is the core key component of the cutter head drive system of the shield machine. During the tunneling process of the shield machine, the main bearing "holds" the cutter head to rotate and cut the working face, and provides rotational support for the cutter head. If the cutter head of the shield machine is compared to a shovel for excavation, then the main bearing is equivalent to the hands controlling it. The function of this component is extremely important because it directly relates to the efficient and safe operation of the shield machine. The design and manufacturing requirements of the main bearing are extremely high, and it needs to face the tests of extremely harsh working conditions such as overweight load, large eccentric load, and frequency-varying load of the shield machine. The cutter head bearing of the shield machine needs to have the characteristics of high purity, high homogeneity, high strength and toughness, and high wear resistance. However, for the common cutter head bearings of shield machines on the market, after long-term use, the plugging head is prone to dislocation or displacement, and it is relatively laborious and cumbersome to take out. After the oil injection port of the bearing is filled with oil, some residual lubricating oil is likely to flow back, which easily leads to the leakage of the lubricating oil. Summary of the Utility Model

[0003] The embodiment of the present disclosure relates to a cutter head bearing of a shield machine. The plugging head assembly and the limiting head assembly are inserted into the inside of the plugging hole together for plugging, improving the plugging effect. Since the outer side of the limiting head assembly is an inclined structure, it can be clamped and fixed inside the plugging hole, improving the positioning and fixing effect. When it is necessary to take out the plugging head assembly, a tool can be directly used to impact the middle position of the plugging head assembly, so that the auxiliary assembly is displaced inside the inner groove, deforming the plugging head assembly, and then using a pair of needle-nose pliers to conveniently pull out the plugging head assembly, improving the extraction efficiency of the plugging head assembly.

[0004] In the first aspect of the present disclosure, a cutter head bearing for a shield machine is provided, specifically including: a bearing body; an oil injection hole is provided inside the bearing body, and a plugging head assembly made of flexible rubber is installed on the bearing body through a plugging hole. The inner end of the plugging head assembly is connected to a limiting head assembly, and the outer side of the limiting head assembly is an inclined structure; an oil injection port; the oil injection port is installed inside the oil injection hole and is communicated with the inside of the oil injection hole. An insertion head structure made of flexible rubber is inserted into the oil injection port. A sealing ring structure in the shape of a circular ring is provided on the outside of the insertion head structure. The cross-section of the sealing ring structure made of flexible rubber is a triangular structure. An inner hole is provided inside the insertion head structure. The outer end of the inner hole is a flared structure, and the inner end of the inner hole is a T-shaped shaft structure.

[0005] In at least some embodiments, plugging holes arranged uniformly are provided inside the bearing body. The plugging holes are T-shaped shaft structures. Through holes arranged in a ring shape uniformly are provided outside the bearing body. An outer groove is provided outside each through hole, and the outer groove is close to the rotor; a connecting groove in the shape of a circular ring is provided inside the bearing body, and the connecting groove communicates all the through holes. A ring groove in the shape of a circular ring is provided inside the limiting head assembly; a circular inner groove is provided inside the plugging head assembly, and an auxiliary assembly with a conical structure is fixed at the outer end of the inner groove.

[0006] In at least some embodiments, two oil injection ports are welded together through a connecting plate structure made of metal. A rectangular bayonet is provided inside each connecting plate structure; two symmetrically arranged limiting structures are inserted into the bayonet. The limiting structures are L-shaped structures. The outer ends of the limiting structures made of elastic metal are arc-shaped structures. The outer ends of the two limiting structures are welded and fixed to an outer plate structure; push plate structures in the shape of circular plates are respectively fixed on the inner sides of the upper and lower ends of the outer plate structure. The inner sides of the push plate structures are adhesively fixed to the insertion head structure and continuously squeeze the insertion head structure to displace.

[0007] The utility model provides a cutter head bearing for a shield machine, which has the following beneficial effects:

[0008] The plugging head assembly and the limiting head assembly are inserted together into the plugging hole for plugging, improving the plugging effect. Since the outer side of the limiting head assembly is an inclined structure, it can be clamped and fixed inside the plugging hole, improving the positioning and fixing effect. When it is necessary to take out the plugging head assembly, a tool can be directly used to impact the middle position of the plugging head assembly, making the auxiliary assembly displace inside the inner groove, deforming the plugging head assembly, and then using a pair of pointed-nose pliers to conveniently pull out the plugging head assembly, improving the extraction efficiency of the plugging head assembly.

[0009] After the oil filling port is used, the outer plate structure, the pushing plate structure, and the insertion head structure can be controlled to move together, so that the insertion head structure is inserted into the interior of the oil filling port for plugging. At the same time, the outer plate structure and the pushing plate structure continuously apply force to squeeze the sealing ring structure, causing the sealing ring structure to be compressed and sealed, improving the sealing strength, preventing the leakage of the lubricating oil flowing back, and allowing the lubricating oil flowing back to enter the interior of the inner hole, improving the plugging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0011] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0012] In the drawings:

[0013] Figure 1 A three-dimensional structural schematic diagram of the present application is shown;

[0014] Figure 2 A disassembled three-dimensional structural schematic diagram of the present application is shown;

[0015] Figure 3 A disassembled bottom view structural schematic diagram of the present application is shown;

[0016] Figure 4 A disassembled three-dimensional structural schematic diagram of a partial cross-section of the bearing body of the present application is shown;

[0017] Figure 5 A disassembled three-dimensional structural schematic diagram of a partial cross-section of the oil filling port of the present application is shown;

[0018] Figure 6 A disassembled bottom view structural schematic diagram of a partial cross-section of the oil filling port of the present application is shown;

[0019] LIST OF REFERENCE NUMERALS

[0020] 1. Bearing body; 101. Plugging hole; 102. Outer groove; 103. Connecting groove; 104. Plugging head assembly; 105. Inner groove; 106. Auxiliary assembly; 107. Limit head assembly; 108. Ring groove;

[0021] 2. Oil filling port; 201. Connecting plate structure; 202. Bayonet; 203. Limiting structure; 204. Outer plate structure; 205. Pushing plate structure; 206. Insertion head structure; 207. Sealing ring structure; 208. Inner hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0023] Embodiment 1: Please refer to Figures 1 to 6 :

[0024] The present utility model provides a cutter head bearing for a shield machine, including: a bearing body 1; an oil injection hole is provided inside the bearing body 1, and a plugging head assembly 104 made of flexible rubber is installed on the bearing body 1 through a plugging hole 101. The inner end of the plugging head assembly 104 is connected to a limit head assembly 107. The outer side of the limit head assembly 107 is an inclined structure, enabling the limit head assembly 107 to be conveniently inserted into the plugging hole 101 and firmly positioned and fixed, improving the positioning and fixing effect and preventing displacement or misalignment of the plugging head assembly 104 and the limit head assembly 107; an oil injection port 2; the oil injection port 2 is installed inside the oil injection hole and communicates with the inside of the oil injection hole. An insertion head structure 206 made of flexible rubber is inserted into the oil injection port 2. An annular sealing ring structure 207 is provided on the outside of the insertion head structure 206. The cross-section of the flexible rubber sealing ring structure 207 is a triangular structure and can be continuously pushed and squeezed to seal the oil injection port 2, improving the sealing effect. An inner hole 208 is provided inside the insertion head structure 206. The outer end of the inner hole 208 is a flared structure, and the inner end of the inner hole 208 is a T-shaped shaft structure, used to make the lubricating oil flow back into the inner hole 208. After pressure is generated, when the pressure is transmitted to the inside of the inner hole 208, the insertion head structure 206 can expand under force, improving the sealing effect.

[0025] In the embodiments of the present disclosure, as Figure 3 compared with Figure 4As shown in the figure, the inner side of the bearing body 1 is provided with evenly arranged plugging holes 101. The plugging holes 101 are in a T-shaped shaft structure, so that the plugging head assembly 104 and the limit head assembly 107 are inserted into the inside for plugging. The outside of the bearing body 1 is provided with through holes arranged in a ring shape and evenly. An outer groove 102 is arranged on the outside of each through hole. The outer groove 102 is close to the rotor, which is convenient for the heat generated by the rotor to be quickly transferred. A circular ring-shaped connecting groove 103 is arranged inside the bearing body 1. The connecting groove 103 connects all the through holes, so that the heat circulates and is discharged. A circular ring-shaped groove 108 is arranged inside the limit head assembly 107, so that the limit head assembly 107 can be deformed under force conveniently, which is convenient for taking out the limit head assembly 107. A circular inner groove 105 is arranged inside the plugging head assembly 104. An auxiliary assembly 106 with a conical structure is fixed at the outer end of the inner groove 105, so that the auxiliary assembly 106 can be deformed inside the inner groove 105, and the outer end of the plugging head assembly 104 is deformed, which is convenient for taking out the plugging head assembly 104 conveniently.

[0026] In the embodiment of the present disclosure, as Figure 5 With Figure 6 shown in the figure, two oil injection ports 2 are welded through a connecting plate structure 201 made of metal, so that the two oil injection ports 2 can be connected and used together. A rectangular bayonet 202 is arranged inside each connecting plate structure 201 for inserting a limiting structure 203, so that the outer plate structure 204, the pushing plate structure 205 and the inserting head structure 206 are stably limited; Two symmetrically arranged limiting structures 203 are inserted into the bayonet 202. The limiting structure 203 is in an L-shaped structure. The outer end of the limiting structure 203 made of elastic metal is in an arc shape, which can be elastically clamped and limited. The outer ends of the two limiting structures 203 are welded and fixed to an outer plate structure 204; Circular plate-shaped pushing plate structures 205 are respectively fixed on the inner sides of the upper and lower ends of the outer plate structure 204. The inner sides of the pushing plate structures 205 are adhesively fixed to the inserting head structure 206, and the inserting head structure 206 is continuously extruded and displaced, so that the inserting head structure 206 can be continuously stressed and is in the inner part of the oil injection port 2 for plugging.

[0027] Working principle of this embodiment: When installing the plugging head assembly 104, directly control the plugging head assembly 104 and the limit head assembly 107 to insert into the inside of the plugging hole 101, so that the plugging head assembly 104 and the limit head assembly 107 are blocked by elasticity. At the same time, the limit head assembly 107 is clamped with the inside of the plugging hole 101 to improve the positioning effect and prevent the limit head assembly 107 and the plugging head assembly 104 from being misaligned. At the same time, when the bearing body 1 is running, heat diffuses through the outer groove 102 and circulates inside the connecting groove 103, and dissipates heat quickly through the through holes. When refueling, a tool can be used to pull the outer plate structure 204 outward to disengage the limit structure 203 from the inside of the bayonet 202, and then refuel. After refueling, control the outer plate structure 204 to reset, so that the insertion head structure 206 is inserted into the inside of the oil filling port 2 for plugging, and the limit structure 203 is inserted into the inside of the bayonet 202 for clamping and fixing, so that the sealing ring structure 207 and the inner hole 208 cooperate with the insertion head structure 206 to plug the oil filling port 2 and prevent the lubricating oil from flowing back and leaking.

[0028] In this article, the following points need to be noted:

[0029] 1. The attached drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure. Other structures can refer to the general design.

[0030] 2. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0031] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. Shield machine cutter head bearing, characterized in that, Comprising: A bearing body (1); an oil injection hole is provided inside the bearing body (1), and a plug head assembly (104) made of flexible rubber is installed on the bearing body (1) through a plugging hole (101). The inner end of the plug head assembly (104) is connected to a limit head assembly (107), and the outer side of the limit head assembly (107) is of an inclined structure; an oil injection port (2); the oil injection port (2) is installed inside the oil injection hole and is communicated with the inside of the oil injection hole. An insertion head structure (206) made of flexible rubber is inserted into the oil injection port (2). A sealing ring structure (207) in a circular ring shape is provided on the outside of the insertion head structure (206). The cross-section of the sealing ring structure (207) made of flexible rubber is of a triangular structure. An inner hole (208) is provided inside the insertion head structure (206). The outer end of the inner hole (208) is of a flared structure, and the inner end of the inner hole (208) is of a T-shaped shaft structure.

2. The cutter head bearing of the shield machine according to claim 1, wherein, A plurality of plugging holes (101) arranged evenly are provided inside the bearing body (1). The plugging holes (101) are of a T-shaped shaft structure. A plurality of through holes arranged in a ring shape evenly are provided on the outside of the bearing body (1). An outer groove (102) is provided on the outside of each through hole, and the outer groove (102) is close to the rotor.

3. The cutter head bearing of the shield machine according to claim 2, wherein, A connecting groove (103) in a circular ring shape is provided inside the bearing body (1), and the connecting groove (103) communicates all the through holes. A ring groove (108) in a circular ring shape is provided inside the limit head assembly (107).

4. The cutter head bearing of the shield machine according to claim 3, wherein, An inner groove (105) in a circular shape is provided inside the plug head assembly (104), and an auxiliary assembly (106) in a conical shape is fixed at the outer end of the inner groove (105).

5. The cutter head bearing of the shield machine according to claim 4, characterized in that, Two of the oil injection ports (2) are welded through a connecting plate structure (201) made of metal. A rectangular bayonet (202) is provided inside each connecting plate structure (201).

6. The cutter head bearing of the shield machine according to claim 5, wherein, Two symmetrically arranged limit structures (203) are inserted into the bayonet (202). The limit structures (203) are of an L-shaped structure. The outer ends of the limit structures (203) made of elastic metal are of an arc shape. The outer ends of the two limit structures (203) are welded and fixed to an outer plate structure (204).

7. The cutter head bearing of the shield machine according to claim 6, characterized in that, A push plate structure (205) in a circular plate shape is respectively fixed on the inner sides of the upper and lower ends of the outer plate structure (204). The inner side of the push plate structure (205) is adhesively fixed to the insertion head structure (206) and continuously squeezes the insertion head structure (206) to displace.

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