CN214997662U - Tunnel boring machine host - Google Patents

Abstract

The utility model relates to a tunnel boring machine host computer, including blade disc structure, drive structure and shield body structure, the blade disc structure has a plurality of slag inlets that the circumference interval set up, and the front end at shield body structure is established to the blade disc structure, and the drive structure sets firmly in shield body structure and with blade disc structural connection, and each slag inlet all leaves the preset distance with the center of blade disc structure, and the back of blade disc structure that corresponds at each preset distance has all set firmly grid screening structure and rock breaker. Grid screening structure encloses with the blade disc structure and closes and constitute one end open-ended collection sediment screening chamber, and the open end orientation in collection sediment screening chamber advances the sediment hole to arrange that rock crusher's crushing portion can stretch into collection sediment screening intracavity. The utility model discloses a tunnel boring machine main frame can collect the breakage of sediment screening and big stone to the stone at blade disc structure back, has improved the crushing efficiency and the efficiency of construction of tunnel boring bold rock greatly, and can avoid the damage of big stone to follow-up equipment.

Description

Tunnel boring machine host

Technical Field

The utility model relates to a tunnel construction equipment technical field especially relates to a tunnel boring machine host computer.

Background

The tunnel boring machine is used as advanced equipment for current underground tunnel construction, and is widely applied to construction of underground tunnels at home and abroad. The tunnel boring machine mainly comprises a main machine, a trailer and the like, wherein the trailer is positioned at the rear end of the main machine, the main machine of the tunnel boring machine mainly comprises a cutter head structure, a driving structure, a shield body structure, a slag discharging system and a segment erector, and the shield body structure is a cylindrical structure with two open ends and can be specifically divided into a front shield, a middle shield and a tail shield; the cutter head structure is arranged at the front end of the shield body structure, the driving structure is arranged in the shield body structure, and the driving structure is connected with the cutter head structure and can drive the cutter head structure to rotate; the slag discharging system is positioned at the bottom in the shield body structure and used for discharging soil and broken stones in a soil bin at the back of the cutter head structure. At present, tunnel boring machines are mainly classified into earth pressure balance shield machines, slurry balance shield machines and hard rock boring machines according to different geology.

(1) Hard rock tunnel boring machines: the opening rate of a cutter head of the hard rock tunneling machine is too low, broken rocks are broken mainly by the space between the hobbing cutters and the front panel of the cutter head, and the rocks are broken into small broken stones to be discharged through the opening of the cutter head after being repeatedly extruded and worn in front of the cutter head, so that the damage to the structure of the cutter head is serious, particularly the abrasion to the front end face of the cutter head is serious, the efficiency is very low, the service life of the cutter head is short, and the like.

(2) Earth pressure balance shield machines: the earth pressure balance shield machine usually meets boulder geology in the whole tunneling process, a cutter head has a large opening rate, the slag soil passing performance is improved, slag is discharged by a bottom spiral conveyor after the boulder passes through the opening of the cutter head, and the earth pressure balance shield machine has the defect that a shaft and blades of the spiral conveyor are clamped and damaged due to large boulders, and the serious damage of equipment is caused.

(3) Slurry balance shield tunneling machine: the problem of large boulders in a slurry storehouse is serious, the problem of broken stone stagnation and discharge and the problem of pump blockage are serious, and the like, the existing slurry balance shield machine generally is provided with a crusher at the bottom of a front shield in consideration of crushing the large boulders, but the crushing efficiency is too low in the current situation, and the whole construction efficiency of a tunnel boring machine is difficult to improve.

Therefore, the inventor provides the main machine of the tunnel boring machine by virtue of experience and practice of related industries for many years so as to overcome the defects in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tunnel boring machine host computer can carry out the breakage of collection sediment screening and big stone to the stone at blade disc structure back, has improved the crushing efficiency and the efficiency of construction of tunnel tunnelling bold rock greatly, and can avoid the damage of big stone to follow-up equipment.

The utility model aims at realizing the main machine of the tunnel boring machine, which comprises a cutter head structure, a driving structure and a shield body structure, wherein the cutter head structure is provided with a plurality of slag inlet holes arranged at intervals in the circumferential direction, the cutter head structure is arranged at the front end of the shield body structure, the driving structure is fixedly arranged in the shield body structure and is connected with the cutter head structure, preset distances are reserved between each slag inlet hole and the center of the cutter head structure, and a grid screening structure and a rock crushing device are fixedly arranged at the back of the cutter head structure corresponding to each preset distance; the grating screening structure and the cutter head structure are enclosed to form a slag collecting screening cavity with one open end, and the open end of the slag collecting screening cavity faces to the corresponding slag inlet hole; the crushing part of the rock crushing device can extend into the slag collecting and screening cavity.

The utility model discloses an in a preferred embodiment, grid screening structure includes a grid bottom plate and sets firmly three grid curb plate on the grid bottom plate, and grid bottom plate and two relative grid curb plates all with blade disc structure rigid coupling.

In a preferred embodiment of the present invention, the surface of each grid side plate is inclined from the grid bottom plate to the outside of the slag collecting and screening chamber.

In a preferred embodiment of the present invention, the width of the slag inlet along the circumferential direction of the cutter head structure is gradually reduced from the edge of the cutter head structure to the center.

The utility model discloses an among the preferred embodiment, equally divide at the back of blade disc structure and the both sides that are located every and advance the sediment hole and do not set firmly a swift current sediment board, the medial extremity of each swift current sediment board stretches into corresponding collection sediment screening intracavity, and the interval between two swift current sediment boards that each advances the sediment hole and correspond is dwindled to the center by the edge of blade disc structure gradually.

In a preferred embodiment of the present invention, the rock breaking device comprises a fixed seat, a driving member and two breaking jaws symmetrically arranged at two sides of the fixed seat; the fixed seat and the driving part are fixedly arranged on the cutter head structure and positioned outside the slag collecting and screening cavity, and crushing teeth are arranged on the opposite sides of the two crushing jaw plates and form a crushing part; two through holes are formed in the grid screening structure at positions corresponding to the two crushing jaws, and the two crushing jaws can be arranged in the corresponding through holes in a swinging mode; the first end of each crushing jaw is all articulated with the fixing base, and the driving piece is connected with the second end of each crushing jaw and can drive two crushing jaws and move in the opening-closing type of collection sediment screening intracavity.

The utility model discloses an among the preferred embodiment, the driving piece includes two hydro-cylinders, and the one end of each hydro-cylinder sets firmly structurally at the blade disc, and the other end of each hydro-cylinder is articulated with the second end of the broken jaw that corresponds.

The utility model discloses an in a preferred embodiment, tunnel boring machine host computer still includes the slag tapping system, and the slag tapping system sets firmly the bottom in the shield body structure.

In a preferred embodiment of the present invention, the slag discharging system is a screw conveyor or a slurry discharging pipe.

The utility model discloses an among the preferred embodiment, the blade disc structure includes the blade disc panel, establishes at the positive a plurality of broken rock cutters of blade disc panel and sets firmly the blade disc flange at blade disc panel back, and each advances the sediment hole and sets up on the blade disc panel, and grid screening structure and rock breaker all set firmly at the back of blade disc panel, drive structure and blade disc flange joint.

The utility model discloses an in a preferred embodiment, the centre ring has set firmly in shield body structure, and the drive structure is including fixing a plurality of motors in the centre ring is inside, the output shaft of each motor all with blade disc flange rigid coupling.

The utility model discloses an in a preferred embodiment, the blade disc open ratio of blade disc structure is 35 ~ 45%.

From above, the utility model provides a tunnel boring machine host computer through set up a plurality of grid screening structures and rock breaker at blade disc structure back, utilizes grid screening structure can sieve the stone for the fritter rubble is discharged, and the bold rubble is stayed in album sediment screening intracavity, utilizes rock breaker can carry out the breakage to the bold stone that gathers sediment screening intracavity, and then realizes effectual collection sediment screening and accomplishes the function of broken bold rock. The main machine can be applied to a hard rock tunnel boring machine, and can also be applied to an earth pressure balance shield machine and a muddy water balance shield machine, so that the problem of difficult rock crushing of various types of tunnel boring machines is solved, and the crushing efficiency of tunneling large rocks is greatly improved. Meanwhile, the difficult problem of crushing large rocks is solved in the back area of the cutter head structure, the host machine subsequent treatment is avoided being left over, the damage of large rocks to subsequent equipment is also avoided, and the construction efficiency of the tunnel boring machine is efficiently improved.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

FIG. 1: do the utility model provides a structural schematic diagram of tunnel boring machine host computer.

FIG. 2: for the utility model provides a structural schematic of another type of tunnel boring machine host computer.

FIG. 3: do the utility model provides a front view of blade disc structure in tunnel boring machine host computer.

FIG. 4: do the utility model provides a blade disc structure back and grid screening structure and rock breaker complex schematic structure.

FIG. 5: for the utility model provides a grid screening structure and rock breaker complex partial enlarged view.

FIG. 6: for the utility model provides a two broken jaws of rock crushing device are in the structure schematic diagram when closing.

The reference numbers illustrate:

1. a cutter head structure; 11. a cutter head panel; 111. a slag inlet hole; 12. a rock breaking cutter; 121. a center knife; 122. hobbing cutters; 123. an edge cutter; 13. a cutter flange;

2. a drive structure; 21. a motor;

3. a shield body structure; 31. a center ring;

4. a grid screening structure; 41. a slag collection screening cavity; 42. a grid floor; 43. a grid side plate;

5. a rock breaking device; 51. a fixed seat; 52. an oil cylinder; 53. crushing the jaw plate; 531. crushing teeth;

6. a slag chute;

7. a slag tapping system;

8. large stones.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1 to 6, the present embodiment provides a tunneling machine host, which includes a cutter head structure 1, a driving structure 2 and a shield structure 3, wherein the cutter head structure 1 has a plurality of slag inlets 111 circumferentially arranged at intervals, the cutter head structure 1 is arranged at the front end of the shield structure 3, and the driving structure 2 is fixedly arranged in the shield structure 3 and connected with the cutter head structure 1. Each advances the center of cinder hole 111 and blade disc structure 1 and all leaves preset distance, all sets firmly grid screening structure 4 and rock crushing device 5 at each preset distance corresponding blade disc structure 1's back. The grating screening structure 4 and the cutter head structure 1 are enclosed to form a slag collecting and screening cavity 41 with one open end, and the open end of the slag collecting and screening cavity 41 is arranged towards the corresponding slag inlet hole 111. The crushing section of the rock crushing device 5 can extend into the slag collecting screening chamber 41. It can be understood that each slag inlet 111 penetrates through the front end face and the rear end face of the cutter head structure 1, the shield body structure 3 is a cylindrical structure with two open ends, and the driving structure 2 can drive the cutter head structure 1 to rotate.

From this, tunnel boring machine host computer in this embodiment through set up a plurality of grid screening structures 4 and rock breaker 5 in cutterhead structure 1 back, utilizes grid screening structure 4 can sieve the stone for the fritter rubble is discharged, and the bold rubble is stayed in album sediment screening chamber 41, utilizes rock breaker 5 can carry out the breakage to the bold stone 8 in album sediment screening chamber 41, and then realizes effectual collection sediment screening and accomplishes the function of broken bold rock. The main machine can be applied to a hard rock tunnel boring machine, and can also be applied to an earth pressure balance shield machine and a muddy water balance shield machine, so that the problem of difficult rock crushing of various types of tunnel boring machines is solved, and the crushing efficiency of tunneling large rocks is greatly improved. Meanwhile, the difficult problem of crushing large rocks is solved in the back area of the cutter head structure 1, the host machine is prevented from being left for subsequent treatment, and the construction efficiency of the tunnel boring machine is efficiently improved.

In a specific implementation manner, as shown in fig. 1, 4 and 5, the grid screening structure 4 includes a grid bottom plate 42 and three grid side plates 43 fixed on the grid bottom plate 42, and the grid bottom plate 42 and two opposite grid side plates 43 are both fixedly connected to the cutter head structure 1 to enclose the slag collecting screening chamber 41. The large stone blocks 8 are intercepted and left to the rock crushing device 5 for crushing through the grids on each grid plate, and the sizes of the grids on the grid bottom plate 42 and each grid side plate 43 are matched with the slag discharging grain size capacity of the tunnel boring machine.

Preferably, the face of each grid side plate 43 is inclined towards the outside of the slag collecting and screening cavity 41 by the grid bottom plate 42, so that the slag collecting and screening cavity 41 forms a funnel structure, a better slag collecting effect is achieved, and the rock crushing device 5 can crush stones conveniently in time.

Of course, other forms can also be adopted as required by the grid screening structure 4, as long as conveniently collect the sediment and sieve the stone and filter can: for example, as shown in fig. 2, the grille screening structure 4 may also be a funnel-shaped structure enclosed by a grille bottom plate 42 and four grille side plates 43, and one of the grille side plates 43 is fixed with the cutter head structure 1; for another example, the grille shutter structure 4 is a funnel-shaped structure surrounded by a grille bottom plate 42 and a conical grille side plate 43, and the grille side plate 43 is fixed to the cutter head structure 1.

The slag inlet 111 can provide a discharge passage for tunneling rocks and slag soil, and the shape of the slag inlet 111 can be determined according to needs, in this embodiment, the width of the slag inlet 111 along the circumferential direction of the cutter head structure 1 is gradually reduced from the edge of the cutter head structure 1 to the center, that is, the cross section of the slag inlet 111 is in an inverted trapezoid shape with a large outside and a small inside.

More preferably, as shown in fig. 4. A slag slide plate 6 is fixedly arranged on the back of the cutter head structure 1 and on both sides of each slag inlet hole 111, the inner side end of each slag slide plate 6 extends into the corresponding slag collecting and screening cavity 41, and the distance between the two slag slide plates 6 corresponding to each slag inlet hole 111 is gradually reduced from the edge of the cutter head structure 1 to the center.

Generally, each slag slide 6 is attached to the side corresponding to the slag inlet 111, and the length direction of each slag slide 6 is arranged along the extending direction of the side corresponding to the slag inlet 111, so that an inverted cone-shaped slag pouring area is formed between the two slag slides 6, and stones and slag soil entering the slag inlet 111 in the tunneling process can be poured into the slag collecting and screening cavity 41 along the slag slides 6 to play a role in pouring slag.

Further, as shown in fig. 4 to 6, the rock crushing device 5 includes a fixed seat 51, a driving member and two crushing jaws 53 symmetrically disposed on two sides of the fixed seat 51, the fixed seat 51 and the driving member are both fixed on the cutter head structure 1 and located outside the slag collecting and screening chamber 41, crushing teeth 531 are disposed on opposite sides of the two crushing jaws 53, and the crushing teeth 531 constitute the crushing portion. Two through holes (not shown in the figures) are arranged on the grid screening structure 4 at positions corresponding to the two crushing jaws 53, and the two crushing jaws 53 are swingably inserted into the corresponding through holes. The first end of each crushing jaw plate 53 is hinged with the fixed seat 51, and the driving piece is connected with the second end of each crushing jaw plate 53 and can drive the two crushing jaw plates 53 to move in the slag collecting and screening cavity 41 in an opening-closing manner.

More specifically, the driving member includes two oil cylinders 52, one end of each oil cylinder 52 is fixedly disposed on the cutter head structure 1 (specifically, an ear seat is fixedly disposed on the back of the cutter head structure 1, one end of each oil cylinder 52 is fixedly connected to the ear seat), and the other end of each oil cylinder 52 is hinged to the second end of the corresponding crushing jaw 53. Each oil cylinder 52 provides power for crushing large rocks, the crushing teeth 531 on the crushing jaws 53 can crush the rocks, and the two crushing jaws 53 can be driven to pass through the corresponding through holes in a swinging manner through the extension and retraction of each oil cylinder 52, so that the opening and closing type movement is realized, and the purpose of crushing the rocks is further achieved.

It will be appreciated that in the case of the grate screening structure 4 shown in figures 1, 2 and 5, the aforementioned through holes are formed in the grate bottom plate 42 and in the corresponding positions of the two opposite grate side plates 43 to facilitate the passage of the crushing jaws 53. In addition, the opening and closing angle of the two crushing jaws 53 should be matched with the angle of the grid screening structure 4 to ensure that the screened large rocks fall into the crushing area.

Of course, other crushers may be used as required for the rock crushing device 5, as long as the crushes the stones in the slag collecting and screening chamber 41, and this embodiment is only for example.

Further, as shown in fig. 1 and 2, the main machine of the tunnel boring machine further comprises a slag discharging system 7, wherein the slag discharging system 7 is fixedly arranged at the bottom of the shield body structure 3 and is used for realizing the function of timely discharging soil and gravels in the soil bin behind the cutterhead structure 1. The slag discharging system 7 is specially designed according to different machine types of equipment so as to efficiently finish the continuous output of the broken stone and slag; for example, for an earth pressure balance shield machine, as shown in fig. 1, the slag discharge system 7 selects a screw conveyor, and the screw conveyor is fixed in the shield body structure 3 through a screw base; for a slurry balance shield machine, as shown in fig. 2, the slurry discharge pipe is selected by the slag discharge system 7, and is fixed in the shield body structure 3 through the slurry pipe machine base.

Because the structure that has crushing function in this embodiment is located 1 back of the blade disc structure, and then greatly reduced the degree of difficulty of slagging tap, improved the efficiency of slagging tap to improve the whole tunnelling efficiency of tunnel boring machine, and effectively avoided the screw conveyer axle that big boulder caused and blade card bad, perhaps the balanced shield of muddy water machine has the rubble to stagnate and arranges and the problem of card pump at the tunnelling in-process, has played the guard action to equipment. In addition, with big stone 8 broken in advance in the blade disc region in this embodiment, can adopt lower configuration to slag tapping system 7 and can satisfy the operation requirement, the cost is lower.

Further, in order to facilitate processing and installation, as shown in fig. 3, the cutter head structure 1 includes a cutter head panel 11, a plurality of rock breaking cutters 12 arranged on the front surface of the cutter head panel 11, and a cutter head flange 13 fixedly arranged on the back of the cutter head panel 11, each slag inlet 111 is arranged on the cutter head panel 11, the grid screening structure 4 and the rock crushing device 5 are fixedly arranged on the back of the cutter head panel 11, and the driving structure 2 is connected with the cutter head flange 13. Generally, the rock breaking cutters 12 include a plurality of center cutters 121 provided at the center of the cutter deck panel 11, a plurality of hob cutters 122 provided on the face of the cutter deck panel 11, and a plurality of side cutters 123 provided at the edge of the cutter deck panel 11.

A center ring 31 is fixedly arranged in the shield body structure 3, the driving structure 2 comprises a plurality of motors 21 fixed in the center ring 31, and output shafts of the motors 21 are fixedly connected with the cutter flange 13. Generally, the center ring 31 is welded on the shield body structure 3, the shell of the motor 21 is fixed on the center ring 31 through bolts, the output shaft of the motor 21 is fixed with the cutterhead flange 13 through bolts, and the torque for tunneling is provided for the cutterhead structure 1 through each motor 21. The driving structure 2 can also adopt other modes as required, so long as the driving structure is convenient for driving the cutter head structure 1 to rotate.

In addition, the cutter head opening ratio of the cutter head structure 1 in this embodiment is preferably 35 to 45%, and specifically, the cutter head opening ratio refers to a ratio of an opening area of the cutter head panel 11 (i.e., a total area of cross sections of the slag inlet holes 111) to a total area of a disk surface of the cutter head panel 11. Adopt great aperture opening rate in this embodiment, can reduce the wearing and tearing of blade disc structure 1, cooperate the rock crushing structure simultaneously also to guarantee that big stone 8 can be effectively broken.

In summary, in the main machine of the tunnel boring machine in the embodiment, through the cooperation of the plurality of grating screening structures 4, the rock crushing devices 5 and the slag chute 6 at the back of the cutter head structure 1, stones and muck are effectively poured into the slag collecting screening cavity 41 by the slag chute 6, the primary screening function of the crushed rock soil at the front of the cutter head structure 1 can be realized by the grating screening structures 4, the large stones 8 can be effectively crushed by the rock crushing devices 5, and a larger cutter head opening rate is adopted; the problems of small opening rate of a cutter head of the hard rock tunnel boring machine and low crushing efficiency of tunneling large rocks are solved, the problem that a shaft and blades of a screw conveyer are easy to be damaged due to large boulders of the earth pressure balance shield machine is solved, and the problems of high-efficiency stone breaking of the mud pressure balance shield machine and pump blockage caused by stagnation in the process of tunneling are solved; the efficient crushing and discharging of broken stones are effectively improved, the crushing efficiency of tunneling large rocks is improved, and the tunnel boring machine host machine is particularly suitable for tunnel boring machine hosts needing broken rocks. Meanwhile, the crushing of the back of the cutter head structure 1 can avoid the large stone blocks 8 from being left on the host machine for subsequent treatment, and the construction efficiency of the tunnel boring machine is efficiently improved; and the main machine structure of the tunnel boring machine is optimized, and the use of the main machine structure space is more reasonable.

The above are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.

Claims (12)

1. A main machine of a tunnel boring machine comprises a cutter head structure, a driving structure and a shield body structure, wherein the cutter head structure is provided with a plurality of slag inlet holes which are arranged at intervals in the circumferential direction, the cutter head structure is arranged at the front end of the shield body structure, the driving structure is fixedly arranged in the shield body structure and is connected with the cutter head structure,

a preset distance is reserved between each slag inlet and the center of the cutter head structure, and a grid screening structure and a rock crushing device are fixedly arranged at the back of the cutter head structure corresponding to each preset distance; the grating screening structure and the cutter head structure are enclosed to form a slag collecting screening cavity with one open end, and the open end of the slag collecting screening cavity faces the corresponding slag inlet hole; the crushing part of the rock crushing device can extend into the slag collecting and screening cavity.

2. A tunnelling machine host as claimed in claim 1,

the grid screening structure comprises a grid base plate and three grid side plates fixedly arranged on the grid base plate, wherein the grid base plate and the two opposite grid side plates are fixedly connected with the cutter head structure.

3. A tunnelling machine host as claimed in claim 2,

the plate surfaces of the grid side plates are obliquely arranged from the grid bottom plate to the outside of the slag collecting and screening cavity.

4. A tunnelling machine host as claimed in claim 1,

the width of the slag inlet along the circumferential direction of the cutter head structure is gradually reduced from the edge of the cutter head structure to the center.

5. A tunnelling machine host as claimed in claim 4,

the back of the cutter head structure is positioned at each of two sides of the slag inlet holes, a slag slide plate is fixedly arranged on each of the two sides of the slag inlet hole, the inner side ends of the slag slide plates extend into the corresponding slag collecting and screening cavities, and the distance between the two slag slide plates corresponding to the slag inlet holes is gradually reduced from the edge of the cutter head structure to the center.

6. The main unit of a tunnel boring machine according to claim 1, wherein the rock breaking device comprises a fixed seat, a driving member and two breaking jaws symmetrically arranged on both sides of the fixed seat;

the fixed seat and the driving piece are fixedly arranged on the cutter head structure and positioned outside the slag collecting and screening cavity, crushing teeth are arranged on one opposite side of the two crushing jaw plates, and the crushing teeth form the crushing part; two through holes are formed in the grid screening structure at positions corresponding to the two crushing jaws, and the two crushing jaws can be arranged in the corresponding through holes in a penetrating mode in a swinging mode; the first ends of the crushing jaw plates are hinged to the fixing seats, and the driving pieces are connected with the second ends of the crushing jaw plates and can drive the two crushing jaw plates to move in the slag collecting and screening cavity in an opening-closing mode.

7. A tunnelling machine host as claimed in claim 6,

the driving piece comprises two oil cylinders, one end of each oil cylinder is fixedly arranged on the cutter head structure, and the other end of each oil cylinder is hinged with the second end of the corresponding crushing jaw plate.

8. A tunnelling machine host as claimed in claim 1,

the main machine of the tunnel boring machine further comprises a slag discharging system, and the slag discharging system is fixedly arranged at the bottom in the shield body structure.

9. A tunnelling machine host as claimed in claim 8,

the slag discharging system is a screw conveyer or a slurry discharging pipe.

10. A tunnelling machine host as claimed in claim 1,

the blade disc structure includes the blade disc panel, establishes the positive a plurality of broken rock cutters of blade disc panel and set firmly the blade disc flange at blade disc panel back, each the slag inlet is seted up on the blade disc panel, grid screening structure and rock breaker all set firmly the back of blade disc panel, the drive structure with blade disc flange joint.

11. A tunnelling machine host as claimed in claim 10,

the shield structure is internally and fixedly provided with a center ring, the driving structure comprises a plurality of motors fixed inside the center ring, and output shafts of the motors are fixedly connected with the cutter head flange.

12. A tunnelling machine host as claimed in claim 1,

the cutter head opening rate of the cutter head structure is 35-45%.

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