Cutter ring for hob of shield tunneling machine

Abstract

The utility model discloses a cutter ring for a hobbing cutter of a shield tunneling machine, which comprises a hobbing cutter ring body, a plurality of first oil cavities are uniformly arranged in the hobbing cutter ring body along the circumference, first plungers are slidably mounted in the first oil cavities, one end of each first plunger is connected with a hard alloy column head, springs are connected between the first plungers and the first oil cavities, and the first plungers are connected with the hard alloy column heads. A second oil cavity is formed in one side of the hob ring body, a second plunger is slidably mounted in the second oil cavity, an adjusting bolt is rotatably connected to one side of the second plunger and is in threaded connection with the hob ring body, and the first oil cavity and the second oil cavity are filled with hydraulic oil and are communicated through a guide pipe 7. The second plunger is pushed through the adjusting nut to squeeze hydraulic oil into the first oil cavity, then the first plunger is pushed to drive the hard alloy column to extend, and the length of the hard alloy column can be flexibly adjusted according to the abrasion condition of the hard alloy column or the rock stratum hardness of the use environment.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machine cutter rings, in particular to a cutter ring for a shield machine cutter ring. Background Art

[0002] A shield machine is a tunnel boring machine that uses the shield method. The shield construction method is that the tunnel boring machine constructs supporting segments while excavating. Shield machines are generally divided into tunneling shields, extrusion shields, semi-mechanical shields (local air pressure, global air pressure), mechanical shields, etc. according to their working principles. The cutter ring is an important component of the shield machine. Usually, the shield machine needs to use a toothed carbide cutter ring when excavating granite, basalt and other strata with a hardness of more than 150 to 250 MPa.

[0003] For example, the Chinese utility model patent with publication number CN205936626U discloses a shield machine cutter ring, which belongs to the technical field of shield machine tools, including a cutter ring body, characterized in that: a radial mounting hole is provided on the outer circle of the cutter ring body, an internal thread is provided in the mounting hole, and a cemented carbide block is installed in the mounting hole; the cemented carbide block is connected to the cutter ring body by threads, and the cemented carbide block is built into the cutter ring body, which can effectively prevent the cemented carbide body from colliding with the rock and soil layer during the process of crushing rock and soil and loosening, and can quickly and conveniently realize the installation and disassembly of the cemented carbide block, which can significantly improve the tool changing efficiency of the shield machine cutter.

[0004] However, a shortcoming of this type of hob is that the length of the carbide block or carbide tooth cannot be adjusted, resulting in reduced excavation efficiency after the carbide tooth wears and becomes shorter, or it is not convenient to flexibly adjust the length of the carbide tooth according to the hardness of the rock formation. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a cutter ring for a shield machine cutter, which solves the problem in the prior art that the length of the hard alloy teeth of the shield machine cutter ring is inconvenient to adjust.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a cutter ring for a shield machine hob, comprising a hob ring body, characterized in that: a plurality of first oil chambers are evenly arranged along the circumference of the hob ring body, a first plunger is slidably installed in the first oil chamber, one end of the first plunger is connected to a carbide stud, the carbide stud is slidably connected to the hob ring body, a spring is connected between the upper wall of the first plunger and the top wall of the first oil chamber, a second oil chamber corresponding to the first oil chamber is provided on one side of the hob ring body, a second plunger is slidably installed in the second oil chamber, an adjusting bolt is rotatably connected to one side of the second plunger, the adjusting bolt is threadedly connected to the hob ring body, the first oil chamber and the second oil chamber are both filled with hydraulic oil and connected through a conduit.

[0007] Preferably, a protective cover is provided on one side of the hob ring body, an adjusting cover is rotatably installed on the protective cover, a sleeve is provided on one side of the adjusting cover, a shaft rod is slidably connected inside the sleeve, one end of the shaft rod is fixedly connected to the adjusting bolt, a key is provided on the outer wall of the shaft rod, and a keyway corresponding to the key is provided on the inner wall of the sleeve.

[0008] Preferably, the outer side of the protective cover is flush with the outer wall of the hob cutter ring body, and the outer side of the adjustment cover is flush with the outer side of the protective cover.

[0009] Preferably, the protective cover is threadedly connected to the hob cutter ring body, a pair of blind holes are provided on the outer side of the protective cover, and a hexagonal hole is provided on the outer side of the adjustment cover.

[0010] Preferably, a first oil seal is disposed on an outer wall of the first plunger, and a second oil seal is disposed on an outer wall of the second plunger.

[0011] Beneficial Effects

[0012] The utility model provides a cutter ring for a shield machine hob, which has the following beneficial effects:

[0013] The device pushes the second plunger to squeeze the hydraulic oil into the first oil chamber through the adjusting nut, and then pushes the first plunger to drive the carbide column to extend. The length of the carbide column can be flexibly adjusted according to the wear condition of the carbide column or the hardness of the rock formation in the use environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front cross-sectional view of the utility model.

[0015] Figure 2 It is a right side cross-sectional view of the utility model.

[0016] Figure 3 It is a left view of the utility model.

[0017] Figure 4 It is an enlarged view of point A of the present utility model.

[0018] In the figure: 1. hob body; 2. first oil chamber; 3. first plunger; 4. spring; 5. carbide column; 6. first oil seal; 7. connecting pipe; 8. second oil chamber; 9. second plunger; 10. second oil seal; 11. adjusting bolt; 12. shaft; 13. protective cover; 14. adjusting cover; 15. hexagonal hole; 16. blind hole; 18. key. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-4 The utility model provides a technical solution: a cutter ring for a shield machine hob, comprising a hob ring body 1, wherein a plurality of first oil chambers 2 are evenly arranged along the circumference of the hob ring body 1, a first plunger 3 is slidably installed in the first oil chamber 2, one end of the first plunger 3 is connected to a hard alloy column head 5, the hard alloy column head 5 is slidably connected to the hob ring body 1, a spring 4 is connected between the upper wall surface of the first plunger 3 and the top wall of the first oil chamber 2, a second oil chamber 8 corresponding to the first oil chamber 2 is provided on one side of the hob ring body 1, a second plunger 9 is slidably installed in the second oil chamber 8, an adjusting bolt 11 is rotatably connected to one side of the second plunger 9, the adjusting bolt 11 is threadedly connected to the hob ring body 1, the first oil chamber 2 and the second oil chamber 8 are both filled with hydraulic oil and connected through a conduit 7;

[0021] By rotating the adjusting bolt 11, the adjusting bolt 11 drives the second plunger 9 to move toward the bottom wall of the second oil chamber 8. The second plunger 9 presses the hydraulic oil in the second oil chamber 8 into the first oil chamber 2 through the conduit 7. The hydraulic oil pushes the first plunger 3 in the first oil chamber 2, and the first plunger 3 drives the carbide column 5 to extend. Conversely, when the adjusting nut 11 is rotated to drive the second plunger 9 away from the bottom of the first oil chamber 8, the hydraulic oil in the first oil chamber 2 flows back to the second oil chamber 8 through the conduit 7, and the spring 4 pushes the first plunger 3 to move toward the bottom of the first oil chamber 2, and the carbide column 5 contracts.

[0022] Furthermore, a protective cover 13 is provided on one side of the hob cutter ring body 1, and an adjusting cover 14 is rotatably mounted on the protective cover 13. A sleeve 17 is provided on one side of the adjusting cover 14, and a shaft 12 is slidably connected in the sleeve 17. One end of the shaft 12 is fixedly connected to the adjusting bolt 11, a key 18 is provided on the outer wall of the shaft 12, and a key groove corresponding to the key 18 is provided on the inner wall of the sleeve 17.

[0023] Furthermore, the outer side of the protective cover 13 is flush with the outer wall of the hob cutter ring body 1, and the outer side of the adjustment cover 14 is flush with the outer side of the protective cover 13;

[0024] Furthermore, the protective cover 13 is threadedly connected to the hob cutter body 1, a pair of blind holes 16 are provided on the outer side of the protective cover 13, and a hexagonal hole 15 is provided on the outer side of the adjustment cover 14;

[0025] When the adjusting cover 14 is rotated, the sleeve 17 drives the adjusting bolt 11 to rotate through the shaft 12. At the same time, the shaft 12 slides on the inner wall of the sleeve 17 while cooperating with the axial movement of the adjusting nut 11. The outer side of the protective cover 13 and the outer side of the adjusting cover 14 are set to be flush with the outer side wall of the hob ring body 1, which does not affect the normal operation of the hob ring body 1. At the same time, the blind hole 16 is provided to facilitate the disassembly and assembly of the protective cover 13, and the hexagonal hole 15 is provided on the adjusting cover 14 to facilitate the rotation of the adjusting cover 14 with practical tools.

[0026] Furthermore, a first oil seal 6 is provided on the outer wall of the first plunger 3, and a second oil seal 10 is provided on the outer wall of the second plunger 9;

[0027] The first oil seal 6 is provided to improve the sealing performance between the first plunger 3 and the first oil chamber 2 ; the second oil seal 10 is provided to improve the sealing performance between the second plunger 9 and the second oil chamber 8 .

[0028] Embodiment: When adjusting the length of the cemented carbide column 5, insert a suitable type of hexagonal wrench into the hexagonal hole of the adjusting cover 14 and rotate the adjusting cover 14. The sleeve 17 drives the adjusting bolt 11 to rotate through the shaft 12. The bolt 11 drives the second plunger 9 to move toward the inner bottom wall of the second oil chamber 8. The second plunger 9 presses the hydraulic oil in the second oil chamber 8 into the first oil chamber 2 through the conduit 7. The hydraulic oil pushes the first plunger 3 in the first oil chamber 2, and the first plunger 3 drives the cemented carbide column 5 to extend. Conversely, when the adjusting nut 11 is rotated to drive the second plunger 9 away from the bottom of the first oil chamber 8, the hydraulic oil in the first oil chamber 2 flows back to the second oil chamber 8 through the conduit 7, and the spring 4 pushes the first plunger 3 to move toward the bottom of the first oil chamber 2, and the cemented carbide column 5 contracts.

[0029] 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. Although the embodiments of the utility model have been shown and described, it is understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A cutter ring for a shield machine hob, comprising a hob ring body (1), characterized in that: A plurality of first oil chambers (2) are evenly arranged along the circumference of the hob cutter ring body (1), a first plunger (3) is slidably installed in the first oil chamber (2), one end of the first plunger (3) is connected to a hard alloy column head (5), the hard alloy column head (5) is slidably connected to the hob cutter ring body (1), a spring (4) is connected between the upper wall surface of the first plunger (3) and the top wall of the first oil chamber (2), a second oil chamber (8) corresponding to the first oil chamber (2) is provided on one side of the hob cutter ring body (1), a second plunger (9) is slidably installed in the second oil chamber (8), one side of the second plunger (9) is rotatably connected to an adjusting bolt (11), the adjusting bolt (11) is threadedly connected to the hob cutter ring body (1), the first oil chamber (2) and the second oil chamber (8) are both filled with hydraulic oil and are connected through a conduit (7); A protective cover (13) is provided on one side of the hob cutter ring body (1), an adjusting cover (14) is rotatably mounted on the protective cover (13), a sleeve (17) is provided on one side of the adjusting cover (14), a shaft (12) is slidably connected inside the sleeve (17), one end of the shaft (12) is fixedly connected to the adjusting bolt (11), a key (18) is provided on the outer wall of the shaft (12), and a key groove corresponding to the key (18) is provided on the inner wall of the sleeve (17).

2. A cutter ring for a shield machine cutter according to claim 1, characterized in that: The outer side of the protective cover (13) is flush with the outer wall of the hob cutter ring body (1), and the outer side of the adjustment cover (14) is flush with the outer side of the protective cover (13).

3. A cutter ring for a shield machine cutter according to claim 2, characterized in that: The protective cover (13) is threadedly connected to the hob cutter ring body (1), a pair of blind holes (16) are arranged on the outer side of the protective cover (13), and a hexagonal hole (15) is arranged on the outer side of the adjustment cover (14).

4. A cutter ring for a shield machine cutter according to any one of claims 1 to 3, characterized in that: A first oil seal (6) is provided on the outer wall of the first plunger (3), and a second oil seal (10) is provided on the outer wall of the second plunger (9).

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