Cutter shaft structure suitable for installing single-blade hob of shield tunneling machine

Abstract

The utility model relates to the technical field of single-blade hobs of shield tunneling machines, in particular to a cutter shaft structure suitable for installing a single-blade hob of a shield tunneling machine, which comprises a cutter shaft main body, a cutter hub, an upper end cover, a lower end cover, a floating sealing ring, a locking sealing ring, a bearing assembly and a cutter ring, the cutter hub is rotationally connected with the cutter shaft body through a bearing assembly, the lower end cover and the upper end cover are arranged at the two ends of the cutter hub respectively, floating sealing rings are arranged on one side of the upper end cover and one side of the lower end cover, and locking sealing rings are arranged on the other side of the upper end cover and the other side of the lower end cover. The two ends of the cutter hub are shielded through the upper end cover and the lower end cover respectively, the upper end cover and the cutter hub as well as the lower end cover and the cutter hub are sealed through the two floating sealing rings respectively, and the upper end cover and the cutter shaft body as well as the lower end cover and the cutter shaft body are locked and sealed through the two locking sealing rings respectively. Lubricating oil leakage and impurity infiltration are effectively prevented, and the service life of the single-blade hob is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of single-edge hobs for shield machines, in particular to a cutter shaft structure suitable for installing single-edge hobs for shield machines. Background Art

[0002] Shield machines play a vital role in tunnel excavation, and single-edged roller cutters are an indispensable component of shield machines. They use the rolling of the cutter ring to trench and crush the rock to achieve the effect of crushing the rock.

[0003] During installation and use, the traditional cutter shaft structure has problems such as insufficient sealing, which may lead to lubricating oil leakage, debris seeping into the tool and damaging the bearings, as well as eccentric wear of the cutter ring and stalling.

[0004] Therefore, in order to address the problems of lubricating oil leakage, debris infiltration into the cutter and bearing damage, as well as eccentric wear and stalling of the cutter ring caused by insufficient sealing of the above-mentioned traditional cutter shaft structure during installation and use, a cutter shaft structure suitable for the installation of single-edged hob cutters of shield machines can be designed. Through the cutter shaft structure with reasonable structure and good sealing, lubricating oil leakage and debris infiltration can be effectively prevented, thereby improving the service life and excavation efficiency of the single-edged hob cutter of the shield machine. Utility Model Content

[0005] In order to overcome the problems of insufficient sealing of the traditional cutter shaft structure during installation and use, such as lubricating oil leakage, debris seeping into the tool to damage the bearing, and cutter ring eccentric wear and stalling.

[0006] The technical solution of the utility model is: a cutter shaft structure suitable for installing a single-edged hob cutter of a shield machine, including a cutter shaft body, a cutter hub, an upper end cover, a lower end cover, a floating sealing ring, a locking sealing ring, a bearing assembly and a cutter ring, the cutter hub is arranged on the periphery of the cutter shaft body, the cutter hub is rotatably connected to the cutter shaft body through the bearing assembly, one end of the cutter hub is provided with an upper end cover, the other end of the cutter hub is provided with a lower end cover, the lower end cover and the upper end cover are both located between the cutter hub and the cutter shaft body, one side of the upper end cover and the lower end cover are both provided with a floating sealing ring, the other side of the upper end cover and the lower end cover are both provided with a locking sealing ring, and the cutter ring is arranged on the periphery of the cutter hub.

[0007] Preferably, the cutter hub is rotatably connected to the cutter shaft body by providing a bearing assembly, the two ends of the cutter hub are respectively shielded by providing an upper end cover and a lower end cover to protect the bearing assembly inside the cutter hub, the upper end cover and the cutter hub and the lower end cover and the cutter hub are respectively sealed by providing two sets of floating sealing rings, the upper end cover and the cutter shaft body and the lower end cover and the cutter shaft body are respectively locked and sealed by providing two sets of locking sealing rings, the cutter hub is installed by providing a cutter ring, and the cutter ring is provided to perform trenching, rolling and crushing operations on rocks.

[0008] Preferably, mounting blocks are fixedly mounted on both ends of the cutter shaft body, and a positioning hole is provided in the middle of the mounting block.

[0009] Preferably, two groups of through-going reserved holes are opened on the surface of the upper end cover, and oil plugs are arranged inside the reserved holes. The oil plugs are snap-connected with the upper end cover through the reserved holes.

[0010] Preferably, the floating seal ring is composed of a floating seal seat, a floating seal ring and a rubber ring. The floating seal ring is arranged inside the floating seal seat, and the rubber ring is arranged between the floating seal seat and the floating seal ring.

[0011] Preferably, two groups of bearing assemblies are provided, a spacer ring is provided between the two groups of bearing assemblies, and the spacer ring is sleeved on the periphery of the cutter shaft body.

[0012] Preferably, a positioning ring is fixedly installed on the periphery of the cutter shaft body, the positioning ring is located inside the lower end cover, and a group of bearing assemblies are in contact with the positioning ring.

[0013] Preferably, a snap ring is provided on the periphery of the cutter hub, the snap ring is snap-connected to the cutter hub, and the snap ring is located on one side of the cutter ring.

[0014] Beneficial effects of the utility model:

[0015] 1. The utility model shields both ends of the cutter hub by the upper end cover and the lower end cover respectively, and two sets of floating sealing rings seal between the upper end cover and the cutter hub and between the lower end cover and the cutter hub respectively, and two sets of locking sealing rings lock and seal between the upper end cover and the cutter shaft body and between the lower end cover and the cutter shaft body respectively, thereby improving the sealing effect of the upper end cover and the lower end cover, effectively preventing the influence of lubricating oil leakage and infiltration of debris on the bearing assembly inside the cutter hub, thereby increasing the service life of the single-edge hob. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic diagram of the three-dimensional structure of the cutter shaft structure suitable for installing a single-edged hob cutter of a shield machine according to the present invention;

[0017] Figure 2 Shown is an exploded three-dimensional schematic diagram of the cutter shaft structure of the utility model suitable for installing a single-edged hob cutter of a shield machine;

[0018] Figure 3 Shown is a schematic diagram of the three-dimensional structure of the cutter shaft structure of the utility model suitable for installing a single-edged hob cutter of a shield machine;

[0019] Figure 4 Shown is a schematic diagram of the three-dimensional structure of the floating sealing ring of the cutter shaft structure suitable for installation of a single-edged hob cutter of a shield machine according to the present invention;

[0020] Figure 5Shown is a schematic diagram of a cutter shaft structure cross-section of the utility model suitable for installing a single-edged hob cutter of a shield machine;

[0021] Explanation of the accompanying reference numerals: 1. Cutter shaft body; 101. Mounting block; 102. Positioning hole; 103. Positioning ring; 2. Cutter hub; 3. Upper end cover; 301. Reserved hole; 302. Oil plug; 4. Lower end cover; 5. Floating sealing ring; 501. Floating seal seat; 502. Floating seal ring; 503. Rubber ring; 6. Locking sealing ring; 7. Bearing assembly; 701. Spacer ring; 8. Cutter ring; 801. Snap ring. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] See also Figure 1-Figure 5 The utility model provides an embodiment: a cutter shaft structure suitable for installing a single-edged hob cutter of a shield machine, comprising a cutter shaft body 1, a cutter hub 2, an upper end cover 3, a lower end cover 4, a floating sealing ring 5, a locking sealing ring 6, a bearing assembly 7 and a cutter ring 8. The cutter hub 2 is arranged on the periphery of the cutter shaft body 1, and the cutter hub 2 is rotatably connected to the cutter shaft body 1 through the bearing assembly 7. An upper end cover 3 is provided at one end of the cutter hub 2, and a lower end cover 4 is provided at the other end of the cutter hub 2. The lower end cover 4 and the upper end cover 3 are both located between the cutter hub 2 and the cutter shaft body 1. A floating sealing ring 5 is provided on one side of the upper end cover 3 and the lower end cover 4, and a locking seal is provided on the other side of the upper end cover 3 and the lower end cover 4. The sealing ring 6 and the cutting ring 8 are arranged on the periphery of the cutting hub 2; the cutting hub 2 is rotatably connected to the cutting shaft body 1 by arranging the bearing assembly 7, and the two ends of the cutting hub 2 are respectively shielded by arranging the upper end cover 3 and the lower end cover 4, thereby protecting the bearing assembly 7 inside the cutting hub 2, and the upper end cover 3 and the cutting hub 2 and the lower end cover 4 and the cutting hub 2 are respectively sealed by arranging two sets of floating sealing rings 5, and the upper end cover 3 and the cutting hub 2 and the lower end cover 4 and the cutting hub 2 are respectively sealed by arranging two sets of locking sealing rings 6, and the upper end cover 3 and the cutting shaft body 1 and the lower end cover 4 and the cutting shaft body 1 are respectively locked and sealed by arranging the cutting hub 2 to install the cutting ring 8, and the rock is trenched, crushed and crushed by arranging the cutting ring 8.

[0024] See also Figures 1-4In this embodiment, both ends of the cutter shaft body 1 are fixedly installed with mounting blocks 101, and a positioning hole 102 is provided in the middle of the mounting block 101; the cutter shaft body 1 can be connected to the shield machine by setting the mounting block 101, and the positioning hole 102 is provided to facilitate positioning of the cutter shaft body 1 during installation; two groups of through-going reserved holes 301 are provided on the surface of the upper end cover 3, and oil plugs 302 are provided inside the reserved holes 301, and the oil plugs 302 are connected to the upper end cover 3 through the reserved holes 301; by setting the reserved holes 301, it is convenient to add lubricating grease to the inside of the cutter hub 2, and by setting the oil plugs The plug 302 can cover the reserved hole 301 when no grease is added, preventing external impurities and dust from entering the interior of the cutter hub 2 through the reserved hole 301; the floating sealing ring 5 is composed of a floating seal seat 501, a floating seal ring 502 and a rubber ring 503, the floating seal ring 502 is arranged inside the floating seal seat 501, and the rubber ring 503 is arranged between the floating seal seat 501 and the floating seal ring 502; the floating seal ring 502 and the rubber ring 503 are installed through the floating seal seat 501, and the floating ring and the rubber ring 503 are combined and used in combination, can cooperate with the cutter hub 2 to rotate, and have strong anti-leakage and anti-fouling capabilities.

[0025] See also Figure 5 In this embodiment, two groups of bearing assemblies 7 are provided, and a spacer ring 701 is provided between the two groups of bearing assemblies 7, and the spacer ring 701 is sleeved on the periphery of the cutter shaft body 1; the two groups of bearing assemblies 7 are isolated by providing the spacer ring 701 to prevent mutual influence; a positioning ring 103 is fixedly installed on the periphery of the cutter shaft body 1, and the positioning ring 103 is located inside the lower end cover 4, and one group of bearing assemblies 7 is in contact with the positioning ring 103; the installation of the bearing assembly 7 is positioned by providing the positioning ring 103 to ensure the stability of the overall hob structure; a retaining ring 801 is provided on the periphery of the cutter hub 2, and the retaining ring 801 is engaged with the cutter hub 2, and the retaining ring 801 is located on one side of the cutter ring 8; the retaining ring 801 can be provided to limit the cutter ring 8 to prevent the cutter ring 8 from accidentally moving during operation.

[0026] During operation, the bearing assembly 7 is positioned using the positioning ring 103, making it easy to install the bearing assembly 7 on the periphery of the cutter shaft body 1. The cutter shaft body 1 can be conveniently connected to the shield machine using the mounting block 101 and the positioning hole 102.

[0027] The cutter hub 2 is rotationally connected to the cutter shaft body 1 by using the bearing assembly 7, and the lower end cover 4 and the upper end cover 3 are respectively used to cover the two ends of the cutter hub 2, thereby protecting the bearing assembly 7 inside the cutter hub 2, and two sets of floating sealing rings 5 ​​are used to seal the upper end cover 3 and the cutter hub 2 and the lower end cover 4 and the cutter hub 2 respectively, and two sets of locking sealing rings 6 are used to lock and seal the upper end cover 3 and the cutter shaft body 1 and the lower end cover 4 and the cutter shaft body 1 respectively, which can effectively enhance the sealing effect of the upper end cover 3 and the lower end cover 4, effectively prevent the leakage of lubricating oil and the infiltration of debris, and improve the service life and excavation efficiency of the single-edged hob of the shield machine.

[0028] Through the above steps, the upper end cover 3 and the lower end cover 4 are respectively used to cover the two ends of the cutter hub 2, the two groups of floating sealing rings 5 ​​are respectively used to seal between the upper end cover 3 and the cutter hub 2 and between the lower end cover 4 and the cutter hub 2, and the two groups of locking sealing rings 6 are respectively used to lock and seal between the upper end cover 3 and the cutter shaft body 1 and between the lower end cover 4 and the cutter shaft body 1, thereby improving the sealing effect of the upper end cover 3 and the lower end cover 4, and effectively preventing the leakage of lubricating oil and the infiltration of debris from affecting the bearing assembly 7 inside the cutter hub 2, thereby improving the service life of the single-edged hob; and solving the problems of lubricating oil leakage, debris infiltration into the tool to damage the bearing, and eccentric wear and stalling of the cutter ring 8 caused by insufficient sealing of the traditional cutter shaft structure during installation and use.

[0029] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present invention.

Claims

1. A cutter shaft structure suitable for installing a single-edged hob cutter of a shield machine, comprising: The present invention also includes a cutter shaft body (1), a cutter hub (2), an upper end cover (3), a lower end cover (4), a floating sealing ring (5), a locking sealing ring (6), a bearing assembly (7) and a cutter ring (8), wherein the cutter hub (2) is arranged on the periphery of the cutter shaft body (1), and the cutter hub (2) is rotatably connected to the cutter shaft body (1) through the bearing assembly (7), an upper end cover (3) is arranged on one end of the cutter hub (2), and a lower end cover (4) is arranged on the other end of the cutter hub (2), and the lower end cover (4) and the upper end cover (3) are both located between the cutter hub (2) and the cutter shaft body (1), a floating sealing ring (5) is arranged on one side of the upper end cover (3) and the lower end cover (4), and a locking sealing ring (6) is arranged on the other side of the upper end cover (3) and the lower end cover (4), and the cutter ring (8) is arranged on the periphery of the cutter hub (2).

2. The cutter shaft structure suitable for installing a single-edged hob cutter of a shield machine according to claim 1, characterized in that: Mounting blocks (101) are fixedly mounted on both ends of the cutter shaft body (1), and a positioning hole (102) is provided in the middle of the mounting block (101).

3. The cutter shaft structure suitable for installing a single-edged hob cutter of a shield machine according to claim 1, characterized in that: Two groups of through-going reserved holes (301) are provided on the surface of the upper end cover (3), and oil plugs (302) are provided inside the reserved holes (301). The oil plugs (302) are engaged and connected with the upper end cover (3) through the reserved holes (301).

4. The cutter shaft structure suitable for installing a single-edged hob cutter of a shield machine according to claim 1, characterized in that: The floating sealing ring (5) is composed of a floating sealing seat (501), a floating sealing ring (502) and a rubber ring (503). The floating sealing ring (502) is arranged inside the floating sealing seat (501), and the rubber ring (503) is arranged between the floating sealing seat (501) and the floating sealing ring (502).

5. The cutter shaft structure suitable for installing a single-edged hob cutter of a shield machine according to claim 1, characterized in that: Two groups of bearing assemblies (7) are provided, and a spacer ring (701) is provided between the two groups of bearing assemblies (7), and the spacer ring (701) is sleeved on the periphery of the cutter shaft body (1).

6. The cutter shaft structure suitable for installing a single-edged hob cutter of a shield machine according to claim 1, characterized in that: A positioning ring (103) is fixedly mounted on the periphery of the cutter shaft body (1), the positioning ring (103) is located inside the lower end cover (4), and a set of bearing assemblies (7) are in contact with the positioning ring (103).

7. The cutter shaft structure suitable for installing a single-edged hob cutter of a shield machine according to claim 1, characterized in that: A snap ring (801) is provided on the periphery of the cutter hub (2), the snap ring (801) is snap-connected to the cutter hub (2), and the snap ring (801) is located on one side of the cutter ring (8).

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