Tunnel portal construction device

Abstract

The invention particularly relates to a tunnel portal construction device, and belongs to the technical field of sample storage equipment. The tunnel portal construction device comprises a shell, a limiting assembly, a telescopic assembly and a hanging assembly. The shell is provided with an opening, the shell comprises two side walls which are oppositely arranged in the first direction, the opening is formed between the two side walls, the two side walls are connected to a bottom wall, and the bottom wall and the opening are oppositely arranged. The limiting assembly is arranged on the side wall and used for locking the excavator bucket to the shell. The telescopic assembly is connected to the shell and comprises a movable end capable of moving in a reciprocating mode. The suspension assembly is connected to the movable end. According to the device, the excavator can be improved on the premise that the structure of the excavator is not improved, so that the bucket of the excavator can be used for lifting I-shaped steel, and the construction cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel opening construction, and in particular relates to a tunnel opening construction device. Background Art

[0002] The construction of tunnel portals includes arching and large pipe shed construction. Generally, the construction process of arching is to support the arch frame at the portal, install the formwork around the arch frame, and finally pour concrete. The arch frame is formed by splicing multiple arc-shaped I-beams. At present, when supporting the arch frame, in order to facilitate construction, an excavator is often used to lift the I-beam, that is, a steel rope is hung on the bucket of the excavator, and then the steel rope is put on the connecting plate of the I-beam, and the I-beam is moved by moving the bucket. However, the disadvantage of this operation method is that, on the one hand, the function of the bucket itself is not designed to achieve lifting objects, so when lifting the I-beam, the fixing reliability is low, and it is not convenient to adjust the posture of the arch frame. On the other hand, the bucket itself is large in size, and when supporting multiple arch frames, the bucket may hit the already erected arch frame. If a new equipment is designed to lift the arch frame, the construction cost will be greatly increased. Therefore, improving the existing equipment to meet the construction needs can effectively save the construction cost. In summary, how to improve the excavator so that the excavator can be used to lift the arch frame is a technical problem that needs to be solved. Summary of the invention

[0003] The object of the present invention is to provide a tunnel portal construction device, which can be suitable for an excavator so that the excavator can be used to lift an I-beam forming an arch frame.

[0004] In order to achieve the above-mentioned purpose of the invention, the technical solution adopted by the present invention is: the embodiment of the present application provides a tunnel portal construction device, including a shell, a limit assembly, a telescopic assembly and a suspension assembly. The shell is provided with an opening, and the shell includes two side walls arranged opposite to each other along a first direction, the opening is formed between the two side walls, and the two side walls are connected to the bottom wall, and the bottom wall is arranged opposite to the opening. The limit assembly is arranged on the side wall, and is used to lock the bucket to the shell. The telescopic assembly is connected to the shell, and includes a movable end that can move back and forth. The suspension assembly is connected to the movable end.

[0005] In some embodiments, the position limiting assembly includes a seat body, a supporting portion, and a connecting rope. The side wall is provided with a rotating shaft, the axis of which is perpendicular to the first direction, the seat body is provided with an axial hole, the rotating shaft is passed through the axial hole, the rotating shaft is configured to remain stationary when the seat body rotates, the seat body is provided with a sliding hole, the axial direction of the sliding hole is perpendicular to the axial direction of the rotating shaft. The supporting portion is inserted into the sliding hole, the connecting rope is connected to the peripheral wall of the rotating shaft, and the connecting rope is connected to the supporting portion.

[0006] In some embodiments, the limiting assembly further includes a supporting portion, and the supporting portion is connected to the bottom wall via a first elastic member.

[0007] In some embodiments, the shell is movably provided with a limiting portion, the moving direction of the limiting portion is parallel to the axial direction of the rotating shaft, the peripheral wall of the rotating shaft is provided with a receiving cavity, and the rotating shaft is also provided with a pressure-bearing portion and a pushing portion. The pressure-bearing portion is movably connected to the inner wall of the receiving cavity, the pressure-bearing portion protrudes from the peripheral wall of the rotating shaft, a second elastic member is provided between the pressure-bearing portion and the rotating shaft, and the pressure-bearing portion is configured so that when the seat body rotates, the connecting rope is pressed tightly against the pressure-bearing portion to move the pressure-bearing portion into the receiving cavity. The pushing portion is movably connected to the rotating shaft along the axial direction of the rotating shaft, the pressure-bearing portion is provided with abutting inclined surface, the pushing portion abuts against the abutting inclined surface, and the pushing portion is transmission-connected to the limiting portion.

[0008] In some embodiments, a side of the pressure-bearing portion protruding from the peripheral wall of the rotating shaft is an arc surface, so that the height of the pressure-bearing portion protruding from the peripheral wall of the rotating shaft gradually increases.

[0009] In some embodiments, the rotating shaft includes a first segment and a second segment, the first segment and the second segment are spaced apart, and the accommodating cavity is formed between the first segment and the second segment.

[0010] In some embodiments, the first segment is provided with a slide rail, and the pressure-bearing portion is slidably connected to the slide rail.

[0011] In some embodiments, a plurality of the limit assemblies are arranged at intervals in the vertical direction, and along the vertical direction, two adjacent limit assemblies are arranged at intervals in the horizontal direction.

[0012] In some embodiments, the telescopic assembly includes a hydraulic cylinder and a telescopic sleeve. The hydraulic cylinder is connected to the housing, the telescopic end of the hydraulic cylinder forms a movable end, and the suspension assembly is connected to the telescopic end. The telescopic sleeve includes an inner rod and a sleeve rod, one of the inner rod and the sleeve rod is connected to the housing, the sleeve rod is sleeved on the inner rod, the axial direction of the inner rod is parallel to the moving direction of the telescopic end, and the suspension assembly is connected to the other of the inner rod and the sleeve rod.

[0013] In some embodiments, the suspension assembly includes a suspension portion and a plurality of unwinding rollers. The suspension portion is connected to the telescopic assembly, and the plurality of unwinding rollers are rotatably connected to the suspension portion.

[0014] The present invention has the following beneficial effects:

[0015] 1. This device can improve the excavator without improving the structure of the excavator itself, so that the excavator bucket can be used to lift the I-beam, reducing the construction cost.

[0016] 2. Suspending the I-beam through the suspension assembly can improve the stability and reliability of the I-beam.

[0017] 3. Under the action of the movable end of the telescopic assembly, the position of the suspension assembly relative to the shell can be adjusted, reducing the risk of the bucket colliding with the erected I-beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front structural schematic diagram of the tunnel portal construction device of the present invention;

[0019] Figure 2 It is a schematic diagram of the back structure of the tunnel portal construction device of the present invention;

[0020] Figure 3 It is a schematic cross-sectional structural diagram of the tunnel portal construction device of the present invention;

[0021] Figure 4 for Figure 3 A magnified image of point A;

[0022] Figure 5 It is a structural schematic diagram of the rotating shaft of the present invention;

[0023] Figure 6 It is a schematic diagram of the cooperation between the pushing part and the limiting part of the present invention.

[0024] Figure numbers: 1-shell, 2-side wall, 3-bottom wall, 4-limiting assembly, 5-bucket, 6-first elastic member, 7-hydraulic cylinder, 8-inner rod, 9-sleeve rod, 10-winding roller, 11-suspension part, 12-rest part, 13-seat body, 14-connecting rope, 15-rotating shaft, 16-pressure-bearing part, 17-rest slope, 18-pushing part, 19-matching part, 20-pushing part. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0026] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] The embodiment of the present application provides a tunnel portal construction device, including a shell 1, a limit assembly 4, a telescopic assembly and a suspension assembly. The shell 1 is provided with an opening, and the shell 1 includes two side walls 2 arranged opposite to each other along a first direction, an opening is formed between the two side walls 2, and the two side walls 2 are connected to a bottom wall 3, and the bottom wall 3 is arranged opposite to the opening. The limit assembly 4 is arranged on the side wall 2, and is used to lock the bucket 5 to the shell 1. The telescopic assembly is connected to the shell 1, and includes a movable end that can move back and forth. The suspension assembly is connected to the movable end.

[0028] The first direction may be the direction indicated by the X-axis in the figure.

[0029] The housing 1 is used to accommodate the bucket 5 of an excavator, that is, the bucket 5 of the excavator can be put into the housing 1 through the opening of the housing 1 .

[0030] When the bucket 5 is disposed in the housing 1 , the bucket 5 is locked in the housing 1 by the limiting assembly 4 , so that when the bucket 5 moves, it can drive the suspension assembly connected to the housing 1 to move.

[0031] Under the action of the movable end of the telescopic assembly, the position of the suspension assembly relative to the housing 1 can be adjusted, reducing the risk of the bucket 5 colliding with the erected I-beam.

[0032] The suspension assembly is used to suspend the I-beam. Compared with directly connecting the bucket 5 and the I-beam through a steel cable, suspending the I-beam through the suspension assembly can improve the stability and reliability of the I-beam.

[0033] The device can improve the excavator without improving the structure of the excavator itself, so that the bucket 5 of the excavator can be used to lift the I-beam, thereby reducing the construction cost.

[0034] In some embodiments, the limiting assembly 4 includes a seat body 13, a supporting portion 12 and a connecting rope 14. The side wall 2 is provided with a rotating shaft 15, the axis of which is perpendicular to the first direction, the seat body 13 is provided with an axial hole, the rotating shaft 15 is inserted into the axial hole, the rotating shaft 15 is configured so that when the seat body 13 rotates, the rotating shaft 15 remains stationary, the seat body 13 is provided with a sliding hole, the axial direction of the sliding hole is perpendicular to the axial direction of the rotating shaft 15. The supporting portion 12 is inserted into the sliding hole, the connecting rope 14 is connected to the peripheral wall of the rotating shaft 15, and the connecting rope 14 is connected to the supporting portion 12.

[0035] Under the action of the rotating shaft 15 , the seat body 13 can be rotatably connected to the side wall 2 .

[0036] The abutting portion 12 is inserted into the sliding hole so that the abutting portion 12 can move relative to the seat body 13 .

[0037] The abutting portion 12 is used to abut against the bucket 5 when the bucket 5 is accommodated in the housing 1 , so that the bucket 5 will not escape from the housing 1 .

[0038] The seat body 13 and the abutting portion 12 may be hollow structures, so that the connecting rope 14 can connect the rotating shaft 15 and the abutting portion 12 .

[0039] The limiting assembly 4 protrudes from the inside of the side wall 2 . If the limiting assembly 4 is fixedly arranged, the limiting assembly 4 will hinder the bucket 5 .

[0040] The connecting rope 14 is used to drive the abutting portion 12 to move, and can reduce the risk of the abutting portion 12 escaping from the sliding hole of the seat body 13 .

[0041] The connecting rope 14 drives the abutting portion 12 to move, which has a simple and reliable structure, is suitable for use in narrow spaces, and is convenient for changing parameters such as the length and thickness of the connecting rope 14.

[0042] In the embodiment of the present application, when the bucket 5 enters the housing 1 from the opening, the bucket 5 pushes the seat body 13 to rotate, so that the bucket 5 can pass through the limit assembly 4. A torsion spring can be provided between the seat body 13 and the side wall 2, so that after the bucket 5 passes through the limit assembly 4, the seat body 13 can be reset, and then the seat body 13 is locked, so that the abutment portion 12 can prevent the bucket 5 from exiting from the housing 1.

[0043] When the seat body 13 rotates, since the rotating shaft 15 remains stationary, the connecting rope 14 can be wound around the rotating shaft 15, and the connecting rope 14 can pull the abutment portion 12 to move into the sliding hole. The advantage of this arrangement is that the structural length formed by the combination of the seat body 13 and the abutment portion 12 can be shortened when the seat body 13 rotates, reducing the distance that the bucket 5 needs to move from the limiting component 4, thereby making the shell 1 more compact, and when multiple limiting components 4 are provided, the risk of interference between two adjacent limiting components 4 is reduced, thereby making the distance between two adjacent limiting components 4 smaller, thereby improving the reliability of fixing the bucket 5.

[0044] In some embodiments, the limiting assembly 4 further includes a supporting portion, and the supporting portion is connected to the bottom wall 3 via a first elastic member 6 .

[0045] The first elastic member 6 may be a spring.

[0046] When the bucket 5 enters the housing 1, the bucket 5 abuts against the support portion and pushes the support portion to move, so that the bucket 5 can pass through the limit assembly 4. When the bucket 5 passes through the limit assembly 4, the support portion pushes the bucket 5 to move, so that the upper edge of the bucket 5 can abut against the abutment portion 12.

[0047] In some embodiments, the housing 1 is movably provided with a limiting portion, the moving direction of the limiting portion is parallel to the axial direction of the rotating shaft 15, the peripheral wall of the rotating shaft 15 is provided with an accommodating cavity, and the rotating shaft 15 is also provided with a pressure-bearing portion 16 and a pushing portion 18. The pressure-bearing portion 16 is movably connected to the inner wall of the accommodating cavity, the pressure-bearing portion 16 protrudes from the peripheral wall of the rotating shaft 15, and a second elastic member is provided between the pressure-bearing portion 16 and the rotating shaft 15. The pressure-bearing portion 16 is configured so that when the seat body 13 rotates, the connecting rope 14 is pressed tightly against the pressure-bearing portion 16 to move the pressure-bearing portion 16 into the accommodating cavity. The pushing portion 18 is movably connected to the rotating shaft 15 along the axial direction of the rotating shaft 15, the pressure-bearing portion 16 is provided with abutting inclined surface 17, the pushing portion 18 abuts against the abutting inclined surface 17, and the pushing portion 18 is transmission-connected to the limiting portion.

[0048] The limiting portion may be disposed above the seat body 13 to limit the seat body 13 from rotating out of the opening of the housing 1 .

[0049] The second elastic member may be a spring, and is used to reset the pressure-bearing portion 16 when the connecting rope 14 is not in contact with the pressure-bearing portion 16 .

[0050] The abutting slope 17 is used to push the pushing part 18, that is, by reasonably setting the inclination direction of the abutting slope 17, when the pressure-bearing part 16 moves into the accommodating cavity, the pushing part 18 can move under the action of the abutting slope 17. Since the pushing part 18 and the limiting part are transmission-connected, the pushing part 18 can drive the limiting part to move.

[0051] The initial state of the limiting part may not be above the seat body 13, and the limiting part does not limit the seat body 13. Then, the limiting part is driven to move by the push part 18, so that the limiting part can be located above the seat body 13, so that the limiting part can limit the seat body 13.

[0052] The specific structure of the transmission connection between the limiting part and the pushing part 18 can be selected from the existing structure. For example, the side wall 2 can be rotatably connected with the pushing part 20, and the pushing part 18 abuts against one side of the pushing part 20. The pushing part 18 is provided with a matching part 19, and the matching part 19 abuts against the other side of the pushing part 20. When the pushing part 20 moves, the pushing part 20 rotates, and then the pushing part 20 pushes the moving part to move, so that the limiting part can also move.

[0053] On the one hand, the pressure-bearing portion 16 can be used to cooperate with the connecting rope 14 to drive the pushing portion 18 to move. On the other hand, the winding radius of the connecting rope 14 can be increased, so that when the seat body 13 rotates, the moving distance of the abutting portion 12 can be increased, further reducing the distance that the bucket 5 needs to move from the limiting assembly 4.

[0054] In some embodiments, one side of the pressure-bearing portion 16 protruding from the peripheral wall of the rotating shaft 15 is an arc surface, so that the height of the pressure-bearing portion 16 protruding from the peripheral wall of the rotating shaft 15 gradually increases.

[0055] The side of the pressure-bearing portion 16 protruding from the peripheral wall of the rotating shaft 15 is an arc surface, so that when the seat body 13 rotates, the winding radius of the connecting rope 14 gradually increases. This arrangement can protect the connecting rope 14, reduce the risk of the connecting rope 14 being bent and broken, and increase the service life of the connecting rope 14.

[0056] In an embodiment in which a spring is provided between the pressure-bearing portion 16 and the rotating shaft 15, the pressure-bearing portion 16 can also protect the connecting rope 14. That is, when the acting force between the connecting rope 14 and the pressure-bearing portion 16 is large enough, the connecting rope 14 can push the pressure-bearing portion 16 to move into the accommodating cavity, thereby achieving the purpose of driving the pushing portion 18 to move and reducing the risk of damage to the connecting rope 14.

[0057] In some embodiments, the rotating shaft 15 includes a first segment and a second segment, the first segment and the second segment are spaced apart, and a receiving cavity is formed between the first segment and the second segment.

[0058] The first segment and the second segment may be connected via a connecting portion such that a gap is formed between the first segment and the second segment.

[0059] The advantage of such a configuration is that, on the one hand, the first segment and the second segment can be detachably connected, thereby facilitating the disassembly and assembly of the pressure-bearing portion 16. On the other hand, the size of the accommodating cavity can be adjusted by adjusting the size of the gap between the first segment and the second segment.

[0060] In some embodiments, the first segment is provided with a slide rail, and the pressure-bearing portion 16 is slidably connected to the slide rail.

[0061] Under the action of the slide rail, the pressure-bearing portion 16 can be movably connected to the rotating shaft 15 .

[0062] The specific extension direction of the slide rail can be reasonably set as needed to ensure that the pressure-bearing part 16 can move into the accommodating cavity and the protrusion degree can be reduced when it is connected to the side of the protruding shaft 15 that abuts against the pressure-bearing part 16.

[0063] In some embodiments, a plurality of limit assemblies 4 are arranged at intervals in the vertical direction, and along the vertical direction, two adjacent limit assemblies 4 are arranged at intervals in the horizontal direction.

[0064] A plurality of limiting components 4 are arranged obliquely in space.

[0065] The advantage of such an arrangement is that, since the two side walls 2 on the soil-entering side of the bucket 5 are arranged at an angle, the plurality of limit assemblies 4 are arranged correspondingly at an angle in space, so that the bucket 5 can be limited by the plurality of limit assemblies 4 .

[0066] In some embodiments, the telescopic assembly includes a hydraulic cylinder 7 and a telescopic sleeve. The hydraulic cylinder 7 is connected to the housing 1, the telescopic end of the hydraulic cylinder 7 forms a movable end, and the suspension assembly is connected to the telescopic end. The telescopic assembly includes a hydraulic cylinder 7 and a telescopic sleeve. The hydraulic cylinder 7 is connected to the housing 1, the telescopic end of the hydraulic cylinder 7 forms a movable end, and the suspension assembly is connected to the telescopic end. The telescopic sleeve includes an inner rod 8 and a sleeve rod 9, one of the inner rod 8 and the sleeve rod 9 is connected to the housing 1, the sleeve rod 9 is sleeved on the inner rod 8, the axial direction of the inner rod 8 is parallel to the moving direction of the telescopic end, and the suspension assembly is connected to the other of the inner rod 8 and the sleeve rod 9.

[0067] The specific structure and working principle of the hydraulic cylinder 7 are well known to those skilled in the art.

[0068] By controlling the flow of oil in the hydraulic cylinder 7 , the extension or retraction of the telescopic end can be controlled, thereby enabling the position of the suspension assembly relative to the housing 1 to be adjusted.

[0069] The sleeve rod 9 is sleeved on the inner rod 8, so that the sleeve rod 9 can move relative to the inner rod 8. The telescopic sleeve can support the suspension assembly, thereby increasing the connection strength between the suspension assembly and the housing 1.

[0070] In some embodiments, the suspension assembly includes a suspension portion 11 and a plurality of unwinding rollers 10. The suspension portion 11 is connected to the telescopic assembly, and the plurality of unwinding rollers 10 are rotatably connected to the suspension portion 11.

[0071] The driving structure of the unwinding roller 10 can be selected from existing structures and will not be described in detail here.

[0072] By winding the steel cable on the unwinding roller 10 and then connecting the steel cable to the I-beam, the purpose of lifting the I-beam can be achieved.

[0073] A plurality of winding rollers 10 are provided, so that when the steel structure is lifted, the angle or posture of the steel structure can be adjusted by adjusting the winding of the steel cable by each winding roller 10 .

[0074] The above embodiments are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations, modifications, and substitutions made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A tunnel portal construction device, characterized in that: include: A shell (1) is provided with an opening, the shell (1) comprising two side walls (2) arranged opposite to each other along a first direction, the opening being formed between the two side walls (2), the two side walls (2) being connected to a bottom wall (3), and the bottom wall (3) being arranged opposite to the opening; A limiting assembly (4), arranged on the side wall (2), and used for locking the bucket (5) to the housing (1); A telescopic assembly connected to the housing (1) and comprising a movable end that can move back and forth; A suspension component is connected to the movable end.

2. The tunnel portal construction device according to claim 1, characterized in that: The limiting component (4) comprises: A seat body (13), the side wall (2) is provided with a rotating shaft (15), the axis of the rotating shaft (15) is perpendicular to the first direction, the seat body (13) is provided with an axial hole, the rotating shaft (15) is passed through the axial hole, the rotating shaft (15) is configured so that when the seat body (13) rotates, the rotating shaft (15) remains stationary, and the seat body (13) is provided with a sliding hole, the axial direction of the sliding hole is perpendicular to the axial direction of the rotating shaft (15); A supporting portion (12) inserted into the sliding hole; A connecting rope (14) is connected to the peripheral wall of the rotating shaft (15), and the connecting rope (14) is connected to the abutting portion (12).

3. The tunnel portal construction device according to claim 2, characterized in that: The limiting assembly (4) also includes a supporting portion, and the supporting portion is connected to the bottom wall (3) via a first elastic member (6).

4. The tunnel portal construction device according to claim 2, characterized in that: The housing (1) is movably provided with a limiting portion, the moving direction of the limiting portion is parallel to the axial direction of the rotating shaft (15), the peripheral wall of the rotating shaft (15) is provided with a receiving cavity, and the rotating shaft (15) is further provided with: A pressure-bearing portion (16) is movably connected to the inner wall of the accommodating cavity, the pressure-bearing portion (16) protrudes from the peripheral wall of the rotating shaft (15), a second elastic member is provided between the pressure-bearing portion (16) and the rotating shaft (15), and the pressure-bearing portion (16) is configured such that when the seat body (13) rotates, the connecting rope (14) is tightly pressed against the pressure-bearing portion (16) to move the pressure-bearing portion (16) into the accommodating cavity; The pushing portion (18) is movably connected to the rotating shaft (15) along the axial direction of the rotating shaft (15); the pressure-bearing portion (16) is provided with an abutting inclined surface (17); the pushing portion (18) abuts against the abutting inclined surface (17); and the pushing portion (18) is transmission-connected to the limiting portion.

5. The tunnel portal construction device according to claim 4, characterized in that: The side of the pressure-bearing portion (16) protruding from the peripheral wall of the rotating shaft (15) is an arc surface, so that the height of the pressure-bearing portion (16) protruding from the peripheral wall of the rotating shaft (15) gradually increases.

6. The tunnel portal construction device according to claim 4, characterized in that: The rotating shaft (15) comprises a first segment and a second segment, the first segment and the second segment are arranged at an interval, and the accommodating cavity is formed between the first segment and the second segment.

7. The tunnel portal construction device according to claim 6, characterized in that: The first section is provided with a slide rail, and the pressure-bearing portion (16) is slidably connected to the slide rail.

8. The tunnel portal construction device according to claim 1, characterized in that: A plurality of the limit assemblies (4) are arranged at intervals in the vertical direction, and along the vertical direction, two adjacent limit assemblies (4) are arranged at intervals in the horizontal direction.

9. The tunnel portal construction device according to claim 1, characterized in that: The telescopic assembly comprises: A hydraulic cylinder (7) connected to the housing (1), the telescopic end of the hydraulic cylinder (7) forming the movable end, and the suspension assembly connected to the telescopic end; The telescopic sleeve comprises an inner rod (8) and a sleeve rod (9), one of the inner rod (8) and the sleeve rod (9) is connected to the housing (1), the sleeve rod (9) is sleeved on the inner rod (8), the axial direction of the inner rod (8) is parallel to the moving direction of the telescopic end, and the suspension assembly is connected to the other of the inner rod (8) and the sleeve rod (9).

10. The tunnel portal construction device according to claim 1, characterized in that: The suspension assembly comprises: A hanging part (11), connected to the telescopic assembly; A plurality of unwinding rollers (10) are rotatably connected to the hanging portion (11).

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