Integrated shield tunneling machine cutterhead bearing

Abstract

The utility model provides an integrated shield tunneling machine cutterhead bearing. The integrated shield tunneling machine cutterhead bearing comprises a left sealing cover, a right sealing cover, a tapered roller bearing and a cutterhead, the left sealing cover and the right sealing cover are connected through a linking screw; the tapered roller bearing is arranged between the left sealing cover and the right sealing cover; a first inner sealing ring and a first outer sealing ring are arranged at the matching part of the tapered roller bearing and the left sealing cover; a second inner sealing ring and a second outer sealing ring are arranged at the matching part of the tapered roller bearing and the right sealing cover; the cutter head is sleeved on the tapered roller bearing, and a check ring is arranged between the tapered roller bearing and the cutter head; errors caused by matching of components can be eliminated, space is saved, and the bearing capacity of the bearing is greatly improved.

Description

Technical Field

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

[0002] Shield machines are widely used in tunnel engineering construction and other fields. Tunnels have complex working conditions and harsh environments. Mud and water are present, which can easily enter the interior of the shield machine and cause failures. The cutterhead bearing is the main component of the shield machine. The bearing operates at low speed, heavy load and negative clearance. The clearance assembly, load-bearing performance and sealing structure are crucial. Currently, the cutterhead bearing is a separate structure from the cutter ring, cutter body and seal, which occupies a large space, has insufficient load-bearing performance, and the clearance assembly process is cumbersome and contains errors. Utility Model Content

[0003] In view of the above problems, the purpose of this application is to provide an integrated shield machine cutter head bearing, so that the outer ring of the bearing, the outer sealing structure of the cutter head, the cutter body and the oil circuit of the cutter head can be integrated into a whole, eliminating the errors caused by the fit between the components; it also saves space and greatly improves the bearing capacity.

[0004] To achieve some or all of the above-mentioned purposes or other purposes, the present application provides the following technical solutions: an integrated shield machine cutter head bearing, comprising a left sealing cover, a right sealing cover, a tapered roller bearing and a cutter head; the left sealing cover and the right sealing cover are connected by connecting screws; the tapered roller bearing is arranged between the left sealing cover and the right sealing cover; a first inner sealing ring and a first outer sealing ring are provided at the matching position of the tapered roller bearing and the left sealing cover, and a second inner sealing ring and a second outer sealing ring are provided at the matching position of the tapered roller bearing and the right sealing cover; the cutter head is sleeved on the tapered roller bearing, and a stop ring is provided between the tapered roller bearing and the cutter head.

[0005] Furthermore, the first outer sealing ring is fixedly connected to the left sealing cover, and the second outer sealing ring is fixedly connected to the right sealing cover.

[0006] Further, the tapered roller bearing includes a first inner ring, a second inner ring, an inner spacer, an outer ring, a first tapered roller, a second tapered roller, a first retaining frame and a second retaining frame; an inner spacer is arranged between the first inner ring and the second inner ring, and the outer peripheral surfaces of the first inner ring, the second inner ring and the inner spacer are in contact with the right sealing cover; the end surface of the first inner ring facing away from the inner spacer is in contact with the left sealing cover, and the end surface of the second inner ring facing away from the inner spacer is in contact with the right sealing cover; a first tapered roller is arranged between the first inner ring and the outer ring, and a second tapered roller is arranged between the second inner ring and the outer ring; the first retaining frame is arranged on the first tapered roller, and the second retaining frame is arranged on the second tapered roller.

[0007] Furthermore, an O-ring seal is provided on the mating surface of the left seal cover and the right seal cover.

[0008] Furthermore, a grease injection hole is provided on the left seal cover; an oil plug is provided to block the grease injection hole.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows: The outer ring of the bearing, the outer sealing structure of the cutter head, the cutter body of the cutter head, and the oil circuit are integrated into a whole, eliminating the errors caused by the mating between components, saving space, and greatly improving the bearing capacity. The integration of the oil circuit and the seal saves space, and at the same time, it will also play a role in blocking muddy water after the grease is injected, enhancing the overall sealing performance and prolonging the service life of the bearing. The integrated shield machine cutter head bearing does not require the assembly of the outer ring and the external seal, nor does it require the customer to assemble the clearance, saving time and effort, improving work efficiency, and being more convenient to disassemble in case of damage during the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a structural schematic diagram of the present utility model;

[0011] Figure 2 is a left view of the present utility model;

[0012] In the figure: 1, left seal cover; 2, right seal cover; 3-1, first inner ring; 3-2, second inner ring; 4, inner spacer ring; 5, outer ring; 6-1, first tapered roller; 6-2, second tapered roller; 7-1, first cage; 7-2, second cage; 8-1, first inner seal ring; 8-2, second inner seal ring; 9-1, first outer seal ring; 9-2, second outer seal ring; 10, snap ring; 11, connecting screw; 12, O-ring seal; 13, grease injection hole; 14, cutter head. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] In order to make the structure and function of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0014] See the appendix Figure 1-2, including a left sealing cover 1, a right sealing cover 2, a tapered roller bearing and a cutter disc 14; the left sealing cover 1 and the right sealing cover 2 are connected by a connecting screw 11; the tapered roller bearing is arranged between the left sealing cover 1 and the right sealing cover 2; the matching part of the tapered roller bearing and the left sealing cover 1 is provided with a first inner sealing ring 8-1 and a first outer sealing ring 9-1, and the matching part of the tapered roller bearing and the right sealing cover 2 is provided with a second inner sealing ring 8-2 and a second outer sealing ring 9-2; the cutter disc 14 is sleeved on the tapered roller bearing, and a stop ring 10 is arranged between the tapered roller bearing and the cutter disc 14; the outer ring 5 of the bearing, the outer sealing structure of the cutter disc 14, the cutter body and the oil circuit of the cutter disc 14 are integrated into a whole, so as to eliminate the error caused by the matching between the components, save space, and greatly improve the bearing capacity of the bearing.

[0015] Furthermore, the first outer sealing ring 9-1 is fixedly connected to the left sealing cover 1, and the second outer sealing ring 9-2 is fixedly connected to the right sealing cover 2; by adding outer sealing rings to the sealing covers, a more stable operating environment in the bearing is ensured.

[0016] Further, the tapered roller bearing includes a first inner ring 3-1, a second inner ring 3-2, an inner spacer 4, an outer ring 5, a first tapered roller 6-1, a second tapered roller 6-2, a first retaining frame 7-1 and a second retaining frame 7-2; an inner spacer 4 is arranged between the first inner ring 3-1 and the second inner ring 3-2, and the outer peripheral surfaces of the first inner ring 3-1, the second inner ring 3-2 and the inner spacer 4 are in contact with the right sealing cover 2; the end surface of the first inner ring 3-1 facing away from the inner spacer 4 is in contact with the left sealing cover 1, and the end surface of the second inner ring 3-2 facing away from the inner spacer 4 is in contact with the right sealing cover 2; the first tapered roller 6-1 is arranged between the first inner ring 3-1 and the outer ring 5, and the second tapered roller 6-2 is arranged between the second inner ring 3-2 and the outer ring 5; the first retaining frame 7-1 is arranged on the first tapered roller 6-1, and the second retaining frame 7-2 is arranged on the second tapered roller 6-2.

[0017] Furthermore, an O-ring 12 is provided on the mating surfaces of the left sealing cover 1 and the right sealing cover 2 .

[0018] Furthermore, a grease injection hole 13 is provided on the left sealing cover 1; an oil plug is provided on the grease injection hole 13; the oil circuit and the seal are integrated to save space as a whole, and at the same time, after the grease is injected, it can also play a role in blocking mud and water, thereby enhancing the overall sealing and extending the service life of the bearing.

[0019] This application does not require the assembly of the outer ring and the external seal, nor does it require the customer to assemble the clearance, which saves time and effort and improves work efficiency. If it is damaged during the construction process, disassembly is more convenient.

[0020] The above disclosure is only the preferred embodiment of the present application. Of course, the scope of rights of the present application cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. An integrated cutter head bearing for a shield machine, characterized in that: It includes a left sealing cover, a right sealing cover, a tapered roller bearing and a cutter disc; the left sealing cover and the right sealing cover are connected by connecting screws; the tapered roller bearing is arranged between the left sealing cover and the right sealing cover; the matching part of the tapered roller bearing and the left sealing cover is provided with a first inner sealing ring and a first outer sealing ring, and the matching part of the tapered roller bearing and the right sealing cover is provided with a second inner sealing ring and a second outer sealing ring; the cutter disc is sleeved on the tapered roller bearing, and a stop ring is arranged between the tapered roller bearing and the cutter disc; a grease injection hole is provided on the left sealing cover; and an oil plug is provided on the grease injection hole.

2. The integrated cutter head bearing of a shield machine according to claim 1, wherein: The first outer sealing ring is fixedly connected to the left sealing cover, and the second outer sealing ring is fixedly connected to the right sealing cover.

3. An integrated cutter head bearing of a shield machine according to claim 1, characterized in that: The tapered roller bearing includes a first inner ring, a second inner ring, an inner spacer, an outer ring, a first tapered roller, a second tapered roller, a first retaining frame and a second retaining frame; an inner spacer is arranged between the first inner ring and the second inner ring, and the outer peripheral surfaces of the first inner ring, the second inner ring and the inner spacer are in contact with the right sealing cover; the end surface of the first inner ring facing away from the inner spacer is in contact with the left sealing cover, and the end surface of the second inner ring facing away from the inner spacer is in contact with the right sealing cover; the first tapered roller is arranged between the first inner ring and the outer ring, and the second tapered roller is arranged between the second inner ring and the outer ring; the first retaining frame is arranged on the first tapered roller, and the second retaining frame is arranged on the second tapered roller.

4. An integrated cutter head bearing of a shield machine according to claim 1, characterized in that: O-rings are arranged on the mating surfaces of the left sealing cover and the right sealing cover.

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