Shield center retaining cutter box

Abstract

The utility model discloses a shield center retaining cutter box. The retaining tool box comprises a box body and a tool hub. And a central cutter is arranged on the cutter hub. The box body is provided with a groove formed in the inner side wall of the box body; the cutter hub is installed in the box body through a fastening bolt in the axial direction, and one side of the cutter hub is provided with a protruding part matched with the groove in a limiting mode. And the cutter hub is matched with the groove through the convex part so as to limit the degree of freedom of the cutter hub in the axial direction. The groove is formed in the inner side wall of the box body, the protruding part in limiting fit with the groove is arranged on one side of the cutter hub, and the degree of freedom of the cutter hub in the axial direction is effectively limited.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of municipal engineering, and particularly relates to a shield center anti-extraction cutter box. BACKGROUND

[0002] With the acceleration of infrastructure construction in China, shield construction is more and more widely used in subway, highway, railway, comprehensive pipe gallery and other projects. In shield construction, various soft and hard uneven strata are inevitably encountered. In the construction of soft and hard uneven strata, the existing design of the cutter box of the center cutter causes the cutter bolt to be easily broken under impact load, thereby causing the center cutter to withdraw, and even the whole cutter to be adjusted into the soil bin, which greatly affects the tunneling safety. SUMMARY

[0003] The present disclosure aims to provide a shield center anti-extraction cutter box, which can solve at least part of the above technical problems.

[0004] A first aspect of the embodiment of the present disclosure provides a shield center anti-extraction cutter box, which comprises:

[0005] a box body having a groove provided on an inner side wall thereof;

[0006] a cutter hub mounted in the box body through a fastening bolt in an axial direction, and one side of the cutter hub having a protruding part in limiting cooperation with the groove; the cutter hub is limited in the freedom degree in the axial direction through the cooperation of the protruding part and the groove.

[0007] Optionally, the box body further comprises an annular mounting part protruding on the inner side wall; the cutter hub is mounted on the annular mounting part through a plurality of fastening bolts distributed along the annular mounting part.

[0008] Optionally, the groove is close to the annular mounting part, and a side wall of the groove is located on the annular mounting part.

[0009] Optionally, when the protruding part is located in the groove, the other side of the cutter hub relative to the protruding part has a gap with the inner side wall of the box body.

[0010] Optionally, the anti-extraction cutter box further comprises a first mounting block on the other side of the cutter hub; the first mounting block at least partially extends into the gap, and both sides of the extending part of the first mounting block abut the cutter hub and the inner side wall of the box body, respectively.

[0011] Optionally, the first mounting block is mounted on the box body through the fastening bolt, and both sides of the cutter hub in the axial direction abut between the annular mounting part and the first mounting block, respectively.

[0012] Optionally, the first mounting block is wedge-shaped, and in the radial direction of the box body, the two sides of the first mounting block abut the cutter hub and the inner side wall of the box body respectively.

[0013] Optionally, the anti-backout cutter box further comprises a second mounting block located on one side of the cutter hub; the second mounting block is mounted on the box body through the fastening bolt, and the two sides of the cutter hub in the axial direction abut between the annular mounting portion and the first mounting block respectively.

[0014] Optionally, the second mounting block is wedge-shaped, and in the radial direction of the box body, the two sides of the second mounting block abut the cutter hub and the inner side wall of the box body respectively.

[0015] The main technical effect achieved by the embodiments of the present disclosure is that by arranging a groove on the inner side wall of the box body and making one side of the cutter hub have a protruding portion limited matched with the groove, the freedom degree of the cutter hub in the axial direction is effectively limited. This design utilizes the structural strength of the cutter box itself to resist the impact load that may be encountered in the process of shield construction, thereby enhancing the stability of the overall structure; since the fixation of the cutter hub is more stable, the adaptability of the cutter in different strata is improved, which can better cope with the stratum conditions of uneven hardness and reduce the construction interruption caused by cutter problems. The improved design of the cutter box not only improves the fixation stability and impact resistance of the cutter, but also helps to reduce the wear of the cutter, thereby prolonging the service life of the cutter, reducing the replacement frequency, and reducing the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a schematic view of a shield center cutter box in an embodiment of the present disclosure;

[0017] Figure 2 FIG. 2 is a schematic view of a cutter hub and a center cutter in an embodiment of the present disclosure.

[0018] FIG. 1 is a schematic view of a shield center cutter box in an embodiment of the present disclosure; DETAILED DESCRIPTION

[0019] The exemplary embodiments will be described in detail herein below with reference to the drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The modes described in the following exemplary embodiments do not represent all the modes consistent with the present disclosure. Rather, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0020] The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The use of the terms "first", "second" and similar terms in the present disclosure is merely intended to distinguish one element from another and is not intended to imply any order or sequence. Similarly, the use of the terms "one" and "another" is not intended to refer to one or the other, but to one or the other, unless otherwise indicated by context. The use of the terms "a" and "an" are intended to refer to one or more, unless otherwise indicated by context. The terms "plurality" and "a plurality" as used herein refer to two or more. The terms "front", "back", "up", "down", and the like as used herein are used for ease of description and are not intended to be limiting. The terms "including", "comprising", and the like as used herein are intended to be inclusive and to mean that there can be additional elements or items. The terms "connected" and "coupled" as used herein are intended to be broad and to encompass both direct and indirect connections and couplings. The use of the terms "a" and "the" and "said" and "the" as used herein are intended to refer to one or more, unless otherwise indicated by context. It will be further understood that the terms "and / or", as used herein, refer to and encompass any or all possible combinations of one or more of the associated listed items.

[0021] As shown in Figure 1 and Figure 2 A shield center stopper cutter box includes a box body 1 and a cutter hub 2. The cutter hub 2 is provided with a center cutter 3.

[0022] The box body 1 has a groove 11 provided on the inner side wall thereof; the cutter hub 2 is installed in the box body 1 through a fastening bolt 4 in the axial direction, and one side of the cutter hub 2 has a protruding portion 21 which is limitedly matched with the groove 11; the cutter hub 2 is limited in the freedom degree in the axial direction through the matching of the protruding portion 21 and the groove 11.

[0023] By setting the groove 11 on the inner side wall of the box 1, and making one side of the cutter hub 2 have a protruding part 21 that limits the cooperation with the groove 11, the freedom of the cutter hub 2 in the axial direction is effectively limited. This design uses the structural strength of the cutter box itself to resist the impact load that may be encountered during shield construction, thereby enhancing the stability of the overall structure; due to the more stable fixation of the cutter hub 2, the adaptability of the center cutter 3 in different strata is improved, and the uneven strata conditions can be better coped with, reducing the construction interruption caused by the center cutter 3 problem. The improved cutter box design not only improves the fixation stability and impact resistance of the center cutter 3, but also helps to reduce the wear of the center cutter 3, thereby prolonging the service life of the center cutter 3, reducing the replacement frequency, and reducing the maintenance cost.

[0024] As an optional implementation, the box 1 further comprises an annular mounting part 12 protruding on the inner side wall; the cutter hub 2 is installed on the annular mounting part 12 through a plurality of fastening bolts 4 distributed along the annular mounting part 12. The annular mounting part 12 on the inner side wall of the box 1 provides an additional mounting point for the cutter hub 2, and through a plurality of fastening bolts 4 distributed along the annular mounting part 12, the cutter hub 2 is more firmly fixed on the box 1. This design not only enhances the fixation stability of the cutter hub 2, but also facilitates the installation and disassembly of the cutter hub 2, improving the convenience of maintenance.

[0025] As an optional implementation, the groove 11 is close to the annular mounting part 12, and the side wall of the groove 11 is located on the annular mounting part 12. The setting of the groove 11 close to the annular mounting part 12 makes the fixation of the cutter hub 2 in the axial direction more compact, and the side wall of the groove 11 located on the annular mounting part 12 further enhances the connection strength between the cutter hub 2 and the box 1, ensuring the stability and reliability of the cutter hub 2 during shield construction.

[0026] As an optional implementation, when the protruding part 21 is located in the groove 11, the other side of the cutter hub 2 relative to the protruding part 21 has a gap between the inner side wall of the box 1. The design of the gap makes the cutter hub 2 able to be put into the cutter box and able to move inward along the axial direction of the cutter box until the protruding part 21 of the cutter hub 2 aligns with the groove 11, and then extends into the groove 11.

[0027] The gap can allow the cutter hub 2 to enter the inside of the cutter box, but also causes the other side of the cutter hub 2 not to directly abut against the inner side wall of the cutter box, so that the other side of the cutter hub 2 cannot be supported during the shield construction process. Therefore, as an optional embodiment, the anti-backoff cutter box further comprises a first mounting block 5 located on the other side of the cutter hub 2; the first mounting block 5 at least partially extends into the gap, and the extending part of the first mounting block 5 abuts against the inner side wall of the cutter hub 2 and the cutter box 1 respectively. The gap is filled by the additional first mounting block 5, so that the cutter hub 2 can indirectly abut against the inner side wall of the cutter box, thereby improving the stability of the cutter hub 2 installation.

[0028] As an optional embodiment, the first mounting block 5 is installed on the cutter box 1 by the fastening bolt 4, and the two sides of the cutter hub 2 in the axial direction abut against the first mounting block 5 and the annular mounting part 12 respectively. The first mounting block 5 is also installed on the annular mounting part 12 by the fastening bolt 4, so that the fastening bolt 4 no longer bears the impact load, thereby reducing the fracture probability of the fastening bolt 4 on the other side of the cutter hub 2.

[0029] As an optional embodiment, the first mounting block 5 is wedge-shaped, and in the radial direction of the cutter box 1, the two sides of the first mounting block 5 abut against the inner side wall of the cutter hub 2 and the cutter box 1 respectively. By setting the first mounting block 5 to be wedge-shaped, the two sides of the first mounting block 5 can abut against the inner side wall of the cutter hub 2 and the cutter box 1 respectively, thereby making the fastening bolt 4 no longer bear the transverse shear force, thereby reducing the fracture probability of the fastening bolt 4 on the other side of the cutter hub 2.

[0030] As an optional embodiment, the anti-backoff cutter box further comprises a second mounting block 6 located on one side of the cutter hub 2; the second mounting block 6 is installed on the cutter box 1 by the fastening bolt 4, and the two sides of the cutter hub 2 in the axial direction abut against the first mounting block 5 and the annular mounting part 12 respectively. The second mounting block 6 is also installed on the annular mounting part 12 by the fastening bolt 4, so that the fastening bolt 4 no longer bears the impact load, thereby reducing the fracture probability of the fastening bolt 4 on one side of the cutter hub 2.

[0031] As an optional embodiment, the second mounting block 6 is wedge-shaped, and in the radial direction of the cutter box 1, the two sides of the second mounting block 6 abut against the inner side wall of the cutter hub 2 and the cutter box 1 respectively. By setting the second mounting block 6 to be wedge-shaped, the two sides of the second mounting block 6 can abut against the inner side wall of the cutter hub 2 and the cutter box 1 respectively, thereby making the fastening bolt 4 no longer bear the transverse shear force, thereby reducing the fracture probability of the fastening bolt 4 on one side of the cutter hub 2.

[0032] The present disclosure changes the cutter box design, adds a mortise and tenon type groove 11 on one side of the cutter box, uses the strength of the cutter box structure itself to resist impact load, while changing the wedge block fixing method on the other side, after the tightening bolt 4 is locked, the tightening bolt 4 no longer bears impact load and transverse shear force, thereby reducing the probability of fracture of the tightening bolt 4 of the center cutter 3, in addition, the mortise and tenon type design can ensure that even if all the bolts of the center cutter 3 are broken, the center cutter 3 will not retreat and the cutter will not fall off.

[0033] The present disclosure has the advantages of simple structure, easy implementation, can change the original fixing method relying only on the tightening bolt 4 to the cutter hub 2, cutter box mortise and tenon fixing plus bolt tightening fixing method, greatly increases the reliability of the fixing, reduces the risk of easy broken wire of the center cutter 3 after impact from the source of the center cutter 3 fixing, thereby greatly improves the formation adaptability and service life of the center cutter 3.

[0034] The above is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A shield center retreat-stop cutter box, characterized in that, The anti-retreat tool box comprises: a box body having a groove arranged on an inner side wall thereof; a tool hub mounted in the box body through fastening bolts in an axial direction, and one side of the tool hub having a protruding part in position-limiting cooperation with the groove; the tool hub is limited in freedom in the axial direction through cooperation of the protruding part and the groove.

2. The shield center retreat-stop cutter box according to claim 1, characterized in that, The box body further comprises an annular mounting part protruding on the inner side wall; the tool hub is mounted on the annular mounting part through a plurality of fastening bolts distributed along the annular mounting part.

3. The shield center stopper cutter box according to claim 2, characterized in that, The groove is arranged close to the annular mounting part, and a side wall of the groove is located on the annular mounting part.

4. A shield center stopper cutter box according to any one of claims 2-3, characterized in that, When the protruding part is located in the groove, the other side of the tool hub relative to the protruding part has a gap with the inner side wall of the box body.

5. The shield center stopper cutter box according to claim 4, characterized in that, The anti-retreat tool box further comprises a first mounting block on the other side of the tool hub; the first mounting block at least partially extends into the gap, and both sides of the extending part of the first mounting block abut against the tool hub and the inner side wall of the box body respectively.

6. A shield center stopper cutter box according to claim 5, characterized in that, The first mounting block is mounted on the box body through the fastening bolts, and both sides of the tool hub in the axial direction abut against the annular mounting part and the first mounting block respectively.

7. The shield center stopper cutter box according to claim 5, wherein, The first mounting block is wedge-shaped, and both sides of the first mounting block abut against the tool hub and the inner side wall of the box body respectively in the radial direction of the box body.

8. The shield center stopper cutter box according to claim 5, wherein, The anti-retreat tool box further comprises a second mounting block on one side of the tool hub; the second mounting block is mounted on the box body through the fastening bolts, and both sides of the tool hub in the axial direction abut against the annular mounting part and the first mounting block respectively.

9. The shield center stopper cutter box according to claim 8, wherein, The second mounting block is wedge-shaped, and both sides of the second mounting block abut against the tool hub and the inner side wall of the box body respectively in the radial direction of the box body.

Images