CN219316954U

CN219316954U - Hard rock tunnel boring machine and cutter fixing device thereof

Info

Publication number: CN219316954U
Application number: CN202320405238.7U
Authority: CN
Inventors: 蒋于波; 杨恒准
Original assignee: Sichuan Ertan International Engineering Consulting Co ltd
Current assignee: Sichuan Ertan International Engineering Consulting Co ltd
Priority date: 2023-03-07
Filing date: 2023-03-07
Publication date: 2023-07-07
Anticipated expiration: 2033-03-07

Abstract

The utility model discloses a hard rock tunnel boring machine and a cutter fixing device thereof, belonging to the technical field of tunnel boring machines, comprising: the first tool apron and the second tool apron are oppositely arranged; the cutter shaft is connected between the first cutter seat and the second cutter seat; and a tool box surrounding the first tool holder and the second tool holder; the first tool apron and the second tool apron are identical in structure. According to the cutter head, one end of the cutter shaft is clamped between the cushion block and the connecting bolt of the cutter head, and the cutter head is welded in the cutter box, so that the technical problem that the cutter head cannot be replaced after being damaged due to the integral design of the cutter head and the cutter head is solved, and the technical effect that the abrasion part can be taken out and replaced after the cutter head is cut from the cutter box is achieved.

Description

Hard rock tunnel boring machine and cutter fixing device thereof

Technical Field

The utility model relates to the technical field of tunnel boring machines, in particular to a hard rock tunnel boring machine and a cutter fixing device thereof.

Background

In the process of tunnel excavation by a TBM (full section hard rock tunnel boring machine), the main function of the cutter holder is to fix the hob and uniformly transmit the acting force of the hob for cutting the rock to the cutter head. When encountering extreme geological conditions such as hard rock, rock burst, weak broken layers and the like, the hob seat is extremely easy to wear or damage due to bearing the vibrating load of the hob and the impact load of the rock, so that the hob is not firmly fixed, the hob cutting effect is affected, the hob abrasion speed or abnormal damage is further accelerated, and the hob use cost is increased.

In the prior art, the cutter holder and the cutter head are generally designed integrally, so that the cutter head has the advantage that the acting force of the hob for cutting rock can be better and uniformly transmitted to the cutter head; however, as the tool apron cannot be disassembled, after the tool apron reaches the wear limit in the use stage, only the repairing is carried out by adopting modes such as overlaying a wear-resistant layer, so that the tool apron is time-consuming and labor-consuming, the repaired quality is not easy to ensure, the repairing part is often easy to damage again in the subsequent use, the repairing is frequent, the construction efficiency is low, and the construction progress is influenced.

Disclosure of Invention

To solve the above problems, a first aspect of the present utility model provides a tool fixing device, including:

the first tool apron and the second tool apron are oppositely arranged; the cutter shaft is connected between the first cutter seat and the second cutter seat; and a tool box surrounding the first tool holder and the second tool holder;

the first tool apron and the second tool apron have the same structure;

the first tool apron is of a concave structure with two high sides and a low center, and comprises a connecting cavity arranged in a central concave part, a first connecting part and a second connecting part which are respectively positioned at the left side and the right side of the connecting cavity, and a first limiting block and a second limiting block which are positioned at the upper side and the lower side of the connecting cavity;

one end of the first limiting block is connected with the first connecting part, and a gap is reserved between the other end of the first limiting block and the second connecting part;

further comprises:

the cushion block is arranged in the connecting cavity,

a connecting block;

and one end of the connecting bolt is connected with the connecting block, and the other end of the connecting bolt is connected with the second connecting part and is used for clamping one end of the cutter shaft between the cushion block and the connecting bolt.

Optionally, the connecting block is located outside the connecting cavity and connected with the first limiting block.

Optionally, the tool box is of a square hollow structure, and the hollow part of the tool box is used for accommodating the first tool apron, the second tool apron and the cutter shaft;

and a gap is reserved between the first tool apron and the second tool apron and the tool box, and the gap is used for connecting the first tool apron and the second tool apron with the tool box through welding.

Optionally, a plurality of screw holes are still seted up to one side that the connecting chamber was kept away from to first connecting portion, the screw hole links to each other with the bolt and is used for fixing first blade holder and second blade holder in the toolbox.

Optionally, the plurality of threaded holes are distributed in an array.

A second aspect of the utility model provides a hard rock tunnel boring machine comprising a cutter fixing apparatus according to any one of the above aspects.

By adopting the technical scheme, the utility model has the following main technical effects:

through with the one end joint of arbor between cushion and the connecting bolt of blade holder to with the blade holder welding in the toolbox, solved blade holder and the blade disc integrated design and led to the blade holder unable technical problem of changing after damaging, realized cutting the blade holder from the toolbox after can taking out the technical effect of changing wearing and tearing part.

Drawings

FIG. 1 is a schematic view of a tool holder according to the present utility model;

FIG. 2 is a schematic view of a tool holder (hidden tool case) according to the present utility model;

fig. 3 is a schematic structural view of a tool fixing device (with a tool box and a tool shaft hidden) according to the present utility model.

Wherein the reference numerals have the following meanings:

1. a first tool apron; 11. a connecting cavity; 12. a first connection portion; 13. a second connecting portion; 14. a first limiting block; 15. a second limiting block 1; 16. a connecting bolt; 17. a connecting block; 18. a cushion block; 19. a threaded hole;

2. a second tool apron;

3. a cutter shaft;

4. knife case

5. And (3) welding seams.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a detailed description of embodiments of the present utility model will be provided below, together with the accompanying drawings, wherein it is evident that the embodiments described are only some, but not all, of the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

Example 1

Referring to fig. 1-3, a first aspect of the present utility model provides a cutter fixing device, which is a hob for fixing a hard rock tunnel boring machine in practical application, and includes a first cutter holder 1 and a second cutter holder 2 disposed opposite to each other, a cutter shaft 3 connected between the first cutter holder 1 and the second cutter holder 2, and a cutter box 4 disposed around the first cutter holder 1 and the second cutter holder 2. It will be appreciated that the hob is provided on the arbor 3.

Further, the first tool holder 1 and the second tool holder 2 have the same structure and are respectively connected with two ends of the cutter shaft 3, so that the cutter shaft 3 is arranged between the first tool holder 1 and the second tool holder 2, specifically, the first tool holder 1 has a concave structure with two high sides and a low center, and comprises a connecting cavity 11 arranged in the concave center, and a first connecting part 12 and a second connecting part 13 respectively positioned at the left side and the right side of the connecting cavity 11, wherein one end of the cutter shaft 3 is connected with the connecting cavity 11.

Referring to fig. 2 and 3, a first limiting block 14 and a second limiting block 15 are further disposed on the upper and lower sides of the connecting cavity 11, wherein one end of the first limiting block 14 is connected to the first connecting portion 12, a gap is formed between the other end of the first limiting block 14 and the second connecting portion 13, and one end of the second limiting block 15 is connected to the first connecting portion 12.

Further, the first tool apron 1 further includes a connecting bolt 16, a connecting block 17 connected with the connecting bolt 16, and a spacer 18 disposed in the connecting cavity 11, by disposing the spacer 18 in the connecting cavity 11, one end of the connecting bolt 16 is connected with the connecting block 17, and the other end extends into the connecting cavity 11 through a gap between the first limiting block 13 and the first connecting portion 12, and then passes through the second limiting block 15 and is fixed by a nut, so that one end of the cutter shaft 3 is clamped between the connecting bolt 16 and the spacer 18, so as to play a role in fixing the cutter shaft 3. Of course, the connection block 17 is located outside the connection cavity 11 and is connected to the first limiting block 14.

Furthermore, the tool box 4 is of a square hollow structure, and the hollow part of the tool box is used for accommodating the first tool holder 1, the second tool holder 2 and the cutter shaft 3, wherein a gap is formed between the first tool holder 1 and the second tool holder 2 and the tool box 4, and the gap can connect the first tool holder 1 and the second tool holder 2 with the tool box 4 in a welding manner, so that a welding seam 5 is formed at the gap.

It will be appreciated that when the parts are worn and then need to be replaced, the first tool holder 1 and the second tool holder 2 can be cut from the tool box 4 along the weld 5, and then the first tool holder 1, the second tool holder 2 and the cutter shaft 3 can be taken out respectively, so that the worn parts can be replaced.

In a preferred embodiment, a plurality of threaded holes 19 are further formed in the side, far away from the connecting cavity 11, of the first connecting portion 12, and the first tool holder 1 and the second tool holder 2 can be further fixed in the tool box 4 in a mode of connecting the bolts with the threaded holes 19, so that stability is enhanced. Wherein the plurality of threaded holes 19 are distributed in an array.

Example two

A second aspect of the utility model provides a hard rock tunnel boring machine comprising a cutter fixing apparatus as described in embodiment one.

Finally, it should be noted that: the embodiment of the utility model is disclosed only as a preferred embodiment of the utility model, and is only used for illustrating the technical scheme of the utility model, but not limiting the technical scheme; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that; the technical scheme recorded in the various embodiments can be modified or part of technical features in the technical scheme can be replaced equivalently; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. A tool holding device, comprising:

the first tool apron and the second tool apron have the same structure;

further comprises:

the cushion block is arranged in the connecting cavity,

a connecting block;

2. The tool holding device of claim 1, wherein the connecting block is located outside the connecting cavity and is connected to the first stopper.

3. The tool fixing device according to claim 1, wherein the tool box is of a square hollow structure, and a hollow part of the tool box is used for accommodating the first tool rest, the second tool rest and the cutter shaft;

4. The tool fixing device according to claim 1, wherein a plurality of threaded holes are further formed in a side, away from the connecting cavity, of the first connecting portion, and the threaded holes are connected with bolts for fixing the first tool holder and the second tool holder in the tool box.

5. The tool holding device of claim 1, wherein the plurality of threaded bores are distributed in an array.

6. A hard rock tunnel boring machine comprising a tool fixing device according to any one of claims 1 to 5.