Tunnel operation platform assembly supporting mechanism and tunnel construction vehicle

Abstract

The invention discloses a tunnel operation platform assembly supporting mechanism and a tunnel construction vehicle, and the tunnel operation platform assembly supporting mechanism comprises a fixed frame connected with a transition vehicle body, a movable frame slidably connected with the fixed frame, a fixed frame connected with the transition vehicle body and a movable frame slidably connected with the fixed frame, the movable frame is formed by splicing a head box structure and a tail, the middle of the fixed frame in the length direction is concave downwards, first sliding rails used for being connected with the head of the movable frame in a sleeved mode are symmetrically arranged on the two side walls of the concave part, the tail of the movable frame is used for being hinged to the operation platform assembly, and the movable frame slides along the first sliding rails and pushes the operation platform assembly to move transversely. The head of the movable frame is changed into a box-shaped structure, the height is increased, the movable frame is sleeved with the guide rail, the height of the guide rail is increased along with the height of the movable frame, it can be guaranteed that the movable frame can stretch out by enough length, and the structure and the connecting mode of the movable frame are matched, so that the operation platform assembly can extend to the tunnel face.

Description

Technical Field

[0001] The invention relates to a tunnel operation device, in particular to a tunnel operation platform assembly support mechanism and a tunnel construction vehicle. Background Art

[0002] The step method is a tunnel excavation method, which refers to the construction method of excavating the upper section of the tunnel first, and then starting to excavate the lower section after the upper step advances a certain distance, and the upper and lower steps advance simultaneously. According to the length of the step, it can be divided into short step, long step, ultra-short step (also known as micro step, the step length is generally 3 to 5m) method, etc. When constructing the step method, it is required that the working platform assembly on the construction vehicle can extend to a sufficient height and length to extend to the upper step. The face, also known as the face, is a term in tunnel construction, that is, the working face that is constantly advancing forward (in tunnel excavation, coal mining, mining or tunnel engineering). Tunnel operation requires the working platform assembly to be able to approach the face to fill the face with explosives, clean the blastholes, etc.

[0003] The invention patent application with publication number CN117184277A discloses a multifunctional tunnel comprehensive operation vehicle and a working method. After the operation platform assembly of the equipment is unfolded, it can cover the entire tunnel face at one time. The multi-layer platform is connected, which can meet the simultaneous construction work in various areas of the face. It is safe, reliable and efficient. However, the equipment involved in this scheme has the following problems: 1. After the vehicle approaches the face, the movable support seat is used to further adjust the upper operation platform to the face. The lateral sliding distance is limited and cannot meet the tunnel section construction requirements of micro-step excavation construction; 2. The longitudinal coverage range of the operation platform assembly in this scheme has been determined, and its unfolding range and height can only be adapted to a very small number of small-section tunnel faces. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a tunnel work platform assembly support mechanism that improves the lateral sliding distance; another purpose of the present invention is to provide a tunnel construction vehicle that can simultaneously improve the lateral sliding distance and the coverage range of the work platform assembly.

[0005] Technical solution: The support mechanism of a tunnel working platform assembly described in the present invention includes a fixed frame used to be connected to a transfer vehicle body, and a movable frame slidably connected to the fixed frame. The movable frame is formed by splicing a head box structure and a tail. The middle part of the fixed frame in the length direction is concave, and the two side walls of the concave part are symmetrically provided with a first slide rail for sleeve-connecting the head of the movable frame. The tail of the movable frame is used to articulate the working platform assembly. The movable frame slides along the first slide rail to push the working platform assembly to move laterally.

[0006] In the present invention, the head of the movable frame is changed into a box-type structure, and the height is increased to ensure that the movable frame itself has sufficient bearing capacity. The movable frame is sleeved in the guide rail, and the guide rail height increases with the height of the movable frame, which can ensure that the movable frame can extend to a sufficient length. The movable frame structure and the connection method are coordinated to enable the working platform assembly to extend to the target face.

[0007] Preferably, in order to further improve the bearing capacity of the guide rail, the first slide rail includes a first groove plate with a transverse opening and a C-shaped longitudinal section. The top and bottom of the first groove plate are respectively spliced ​​with L-shaped bent plates to form a square tube structure. The height of the square tube structure at the bottom of the first groove plate is greater than the height of the square tube structure at the top, and the two sides of the movable frame are sleeved between the square tube structures.

[0008] Preferably, a plurality of first cross beams are provided at the top and bottom of the first slide rail; the top height of the tail of the first slide rail is lowered to form a bracket, and when the head of the movable frame is inserted into the first slide rail, the tail of the movable frame is placed on the bracket. The first cross beam is used to enhance the strength of the fixed frame itself and the first slide rail.

[0009] Preferably, a plurality of vertical plates are provided inside the head box structure, and the vertical plates are parallel to the width direction of the movable frame, dividing the head box structure into a plurality of sub-boxes, and a first through hole is provided in the middle of the vertical plates for a driving mechanism for driving the movable frame to slide through. The vertical plates are connected to the side walls, top surface and bottom surface of the movable frame around to improve the strength of the movable frame.

[0010] Preferably, a cantilevered first walkway frame extending to the head of the movable frame is provided at the rear of the movable frame, a roller is provided at the front end of the first walkway frame, the roller is overlapped with the fixed frame, the movable frame slides along the fixed frame, and the first walkway frame is spliced ​​with the fixed frame to form a bridge for entering the working platform assembly.

[0011] Preferably, a counterweight is provided at the front end of the fixed frame, and the counterweight is level with the vehicle body when the movable frame is extended.

[0012] Preferably, a rear supporting leg is provided at the rear end of the movable frame, and when the movable frame is extended to the upper step, the rear supporting leg is extended.

[0013] Preferably, a cantilevered second walkway frame is provided on the outer side of the first slide rail.

[0014] Preferably, a plurality of first sliding blocks for supporting the sliding of the movable frame are provided inside the first slide rail and at the front end of the movable frame, the first sliding blocks are provided with second through holes for temporarily storing lubricating oil, and the second through holes are surrounded by sink grooves connected to the second through holes for guiding the lubricating oil. The sliding blocks are located between the movable frame and the guide rails to reduce friction, the through holes are used to temporarily store lubricating oil, and the sink grooves guide the lubricating oil in the through holes for lubrication.

[0015] Preferably, a support frame for supporting a horizontally placed working platform assembly is provided on the fixed frame, a fixed outrigger box for accommodating a telescopic outrigger system is provided at the bottom, and a ladder for getting on the vehicle is provided on the side.

[0016] A tunnel work vehicle including the above-mentioned tunnel work platform assembly support mechanism, wherein the work platform assembly is hinged to the rear of the movable frame through a lifting mechanism, the lifting mechanism is a chord rod with a rectangular cross section and a second cross beam with a rectangular cross section welded to form a truss structure, the upper panel of the chord rod is spliced ​​with a second groove plate with a C-shaped longitudinal section to form a second slide rail, and guide rails are provided on both sides of the work platform assembly and are sleeved in the second groove plate.

[0017] By setting up a lifting mechanism to raise the height of the working platform assembly to increase the longitudinal coverage of the working platform assembly, the lifting of the groove plate and chord rod splicing structure helps to increase the bearing capacity of the second slide rail to meet the weight of the working platform assembly itself and the load capacity requirements of the user, thereby ensuring the safety of the user.

[0018] Preferably, a box-shaped reinforcement structure is provided on the outer side of the top of the second slide rail, a second slider supporting the sliding of the working platform assembly is provided inside the top of the second slide rail and outside the bottom of the guide rail, and the second slider on the top of the second slide rail is connected to the end face of the reinforcement structure. The reinforcement structure prevents the pressure from causing the top of the second slide rail to explode when the movable platform assembly is extended, and prevents the slider from falling off due to shear force.

[0019] Preferably, the working platform assembly includes an intermediate platform, in which upper and lower walkway passages are provided, and flip platforms are symmetrically hinged at both ends of the walkway passage. The flip platform rotates around the intermediate platform and is recovered into the walkway passage to reduce the width of the working platform assembly, or is spliced ​​with the walkway passage to extend the length of the walkway passage; a sliding platform is sleeved in the flip platform, and the sliding platform is extended when the flip platform is spliced ​​with the walkway passage to continue to extend the length of the walkway passage. The lengths of the flip platform and the sliding platform are both greater than 1.1m.

[0020] Increase the length of the flip platform and the sliding platform to widen the width of the walkway of the working device to improve the lateral coverage of the working platform assembly. In this case, continuing to increase the number of walkway layers will easily cause the middle platform to be too long. When the vehicle is folded, the middle platform cannot be placed flat on the second-class floor connection platform of the vehicle. Therefore, the walkway is reduced to two layers to meet the requirements of the working platform assembly for folding the vehicle.

[0021] Preferably, the chord beam and the second slot plate splicing structure are hinged to the lifting cylinder near the waist of the side of the middle platform, and the bottom of the middle platform is connected to the piston rod of the lifting cylinder. The lifting cylinder is extended and retracted to pull the middle platform to slide along the lifting mechanism to raise the height of the middle platform.

[0022] Preferably, a support leg assembly for raising the fixed frame and the vehicle body is connected below the bottom of the fixed frame, and the support leg assembly includes a horizontal telescopic leg and a vertical telescopic leg. The horizontal telescopic leg is arranged between the fixed leg box and the vertical telescopic leg, and is used to change the tilting surface of the vehicle body. The vertical telescopic leg is connected to the front end of the horizontal telescopic leg, and is used to raise the height of the fixed frame and the movable frame. The support leg assembly is arranged at the bottom of the fixed frame to raise the height of the movable frame so that the movable frame can go over the steps.

[0023] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. Improves the sliding distance of the working platform assembly: increases the horizontal sliding range of the working platform assembly to 5m and above, ensuring that the working platform assembly can not only be close to the heading face, but also extend to the heading face of the micro-step tunnel in the depth direction; 2. The movable platform adopts a large square box structure to increase strength and rigidity and improve performance. The first guide rail is arranged in the fixed frame to form a large-section slideway; 3. The working platform assembly with adjustable hinge height at the rear of the movable frame can not only extend to the upper step heading face, but also flexibly adjust the coverage range of the working platform assembly according to the cross-section conditions, with high flexibility in construction operation adjustment and strong adaptability; 4. The first guide rail of the fixed frame is equipped with a skeleton beam outside or the bottom of the fixed frame can be flexibly connected to an external lifting device to lift the construction vehicle as a whole, further improving the longitudinal coverage range. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A side view of a tunnel construction vehicle in a retracted state according to a third embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the state structure of a tunnel construction vehicle exhibition vehicle according to the third embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the movable frame structure of the first embodiment of the present invention;

[0027] Figure 4 for Figure 3 A magnified view of the local structure in

[0028] Figure 5 A schematic diagram of a fixed frame structure according to a first embodiment of the present invention

[0029] Figure 6 for Figure 5 A magnified view of the local structure in

[0030] Figure 7 for Figure 5 A side view of the structure in FIG.

[0031] Figure 8 It is a schematic structural diagram of a lifting mechanism according to a second embodiment of the present invention;

[0032] Fig. 9 for Figure 8 A magnified view of the local structure in

[0033] Fig.10 It is a schematic diagram of the structure of the working platform assembly according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0035] Example 1: Figure 1 and Figure 2 The present invention provides a tunnel work platform assembly support mechanism, which is mainly composed of a movable frame 5 and a fixed frame 6. The rear of the front of the body 1 of the transfer vehicle is a Class II automobile connection platform, and the fixed frame 6 is connected to the Class II automobile connection platform. The movable frame 5 is slidably connected in the fixed frame 6, with the end close to the front of the body 1 as the front end / head (the following description is based on this direction), and the rear of the movable frame 5 is the work platform assembly 3. The movable frame 5 can be driven by a driving mechanism to slide out relative to the fixed frame 6, pushing the work platform assembly 3 to the upper step face.

[0036] like Figure 3 The movable frame 5 is a two-section structure. The first section is the head 52, which is a box structure. The second section is the tail. The tail is a frame and a box splicing structure: the front and rear ends are boxes, and the middle is connected by a frame. The two sides of the head 52 are sleeved between the upper and lower tube structures of the slide rail 63 to form a sliding connection with the fixed bracket 6. A driving mechanism 51 is installed inside the head 52. The movable frame 5 and the fixed bracket 6 are connected by the driving mechanism 51. The driving mechanism 51 pushes the movable frame 5 to slide along the slide rail 63. The driving mechanism 51 can be an oil cylinder. Changing the movable frame 5 to a box structure can greatly increase the height of the movable frame, and its height is not less than 300mm.

[0037] A cantilevered platform frame 56 extending toward the head 52 is provided on the side of the rear end of the movable frame 5, a platform board (not shown) is laid on the platform frame 56, and a roller is provided at the front end of the platform frame 56, which overlaps with the fixed frame 6. When the movable frame 5 slides out along the fixed frame 6, the platform frame 56 is spliced ​​with the fixed frame 6 to form a bridge entering the work platform assembly. The rear end of the movable frame 5 is connected to the work platform assembly 3 through the lifting mechanism 4. The movable frame 5 supports the lifting bracket 4 and the working platform assembly 3 in an upright state. A connecting seat 53 is provided at the rear end thereof for being hinged with the lifting mechanism 4. A lifting cylinder 55 is provided for pushing the lifting mechanism 4 to rotate around the movable frame 5. A rear supporting cylinder 54 is provided at the very rear end. During operation, the driving mechanism 51 pushes out the movable frame 5, and the movable frame 5 extends to the upper step to push the working platform assembly 3 to the tunnel face. The rear supporting cylinder 54 extends out and stands on the step to support the rear end of the movable frame 5, thereby improving the overall rigidity and operation stability.

[0038] like Figure 4 , is an enlarged view of the structure of the head 52 of the movable frame 5. The main body of the head 52 is a box structure, and the top and bottom surfaces are both flat plates 522. The top and bottom flat plates 522 are connected to rectangular box guide rails 521 on the left and right sides to form a square box structure. The head 52 is provided with a plurality of vertical plates 523 perpendicular to the flat plates 522 and parallel to the width direction of the movable frame 5. The vertical plates 523 divide the box structure of the movable frame 5 into a plurality of sub-boxes. The middle of the vertical plates 523 is provided with a through hole for the driving mechanism 51 to pass through. A rectangular slider 57 is installed on the front end of the square box guide rail 521. The slider 57 is provided with a through hole for temporarily storing lubricating oil to reduce friction. A sink connected to the through hole is provided around the through hole. The sink drains the lubricating oil in the through hole for lubrication. The slider 57 is fixed with bolts, and the surrounding ring is clamped with a stopper welded on the outside of the square box guide rail 521. The stopper is used to counteract shear force.

[0039] like Figure 5 The fixed frame 6 is a rectangular frame as a whole, with a concave middle part and cantilevered frame structures on both sides. The upright side walls of the middle concave part are symmetrically provided with slide rails 63, which are used to sleeve the movable frame 5. The top and bottom of the slide rails 63 are provided with a plurality of first cross beams for strengthening the connection. The frame structures on both sides are mainly formed by welding perpendicular chord rods and skeleton beams 67. The cantilevered frame structures on both sides are the walkway skeletons supporting the walkway plates, and provide installation fulcrums and space for the box body 7 and the auxiliary multifunctional system. The front end of the fixed frame 6 is equipped with a counterweight 61, which is the balance weight of the movable frame 5 to ensure the stability of the operation. The top part of the tail is cut off to form a step-shaped bracket for placing the recovered movable bracket 5. A vertical support frame 62 is provided on the fixed frame 6, and a ladder 66 is provided on the side. The support frame 62 is used to support the working platform assembly 3 when the vehicle is collected to reduce the shaking of the driving state.

[0040] like Figure 6 , Figure 7 , is an enlarged view of the structure of the tail of the fixed frame 6. The slide rail 63 is mainly composed of a groove plate 631 with a C-shaped longitudinal section. The top and bottom of the inner side of the groove plate 631 are respectively spliced ​​with L-shaped bending plates. The bending plates are respectively surrounded by the groove plate 631 at the top and bottom of the groove plate 631 to form an upper tube structure 633 and a lower tube structure 634 with a rectangular cross section. The height and cross section of the lower tube structure 634 are both larger than the upper tube structure 633. The height of the lower tube structure 634 is not less than 170mm. The movable frame 5 is sleeved between the upper and lower tube structures, and the first crossbeam is connected to the bending plate. The tail of the groove plate 631 has a stepped fracture, which is used to form a bracket at the tail of the fixed frame 6. The end of the fracture is wrapped with a rib plate 632 to prevent the groove plate 631 from exploding. A rectangular slider 64 is provided on the inner side wall of the horizontal plate and the slot plate of the bending plate at the tail. The slider 64 is similar to the slider 57 and is fixed inside the tail of the slot plate 431 with bolts. The circumference is clamped by a baffle welded inside the slot plate 431 and on the bending plate. The baffle can reduce the force on the fixing bolts and prevent the bolts from loosening or shearing and causing the slider to fall off. During assembly, the sliders 64 and 57 are located between the movable frame 5 and the fixed frame 6 to reduce friction and lubricate, so that the movable platform slides without abnormal noise and more smoothly.

[0041] Embodiment 2: Based on Embodiment 1, this embodiment can also have the following variations: Figure 8 and Fig. 9The lifting mechanism 4 is a truss structure formed by welding the left and right longitudinal chords 412 and the second crossbeam in the middle. The top of the chord 412 is provided with a web connected to the second crossbeam. The web is inclined and enclosed with the chord 412 and the crossbeam to form a right triangle. The chord 412 and the second crossbeam are both square tubes with rectangular cross sections. The chord 412 is formed by splicing at least two square tubes with rectangular cross sections side by side to ensure the bearing capacity of the chord 412. The side of the lifting mechanism 4 close to the movable frame 5 is defined as the back side. The front panel (upper panel) of the chord 412 is spliced ​​with a groove plate 411 with a C-shaped cross section to form a slide rail 41 for the working platform assembly 3 to slide. The top of the spliced ​​structure of the chord 412 and the groove plate 411 (the end supporting the working platform assembly 3 to slide out) is provided with an L-box-shaped reinforcement structure 413 on the outside to prevent the guide rail from exploding. The outer curved plate of the reinforcement structure 412 extends to the back side of the chord 412 and overlaps with the back plate of the chord 412. The top front of the splicing structure of the slot plate 411 and the chord rod 412 is hinged with a lifting cylinder 44, which is used to pull up the working platform assembly 3. The bottom of the back of the splicing structure of the slot plate 411 and the chord rod 412 is provided with a hinge seat 42 symmetrically arranged on the left and right, which is used to be hinged with the connecting seat 53 at the tail of the movable frame 5, and the middle part is symmetrically provided with a lifting cylinder 55 hinge seat, which is used to support the lifting cylinder 55; the back of the lifting mechanism 4 is connected with a climbing ladder 43, which is the passage for the operator to enter the working platform assembly 3 and escape in an emergency. Under the push of the lifting cylinder 55, the lifting mechanism 4 can change its posture, from the horizontal state of the car being stored to the vertical state when the car is displayed by 90°. A slider is installed in the slot plate 411. The structure of this slider is the same as that of the slider 64 installed in the slide rail 63, but the size is different. A fixed structure is arranged around this slider, and it is connected to the C-shaped curved plate at the outer end of the reinforcing structure 413, and is fixed inside the top of the slot plate 411.

[0042] like Fig.10 ,like Figure 8 The working platform assembly 3 includes an intermediate platform 31, which is a frame structure with strip guide rails on both sides, which are slidably connected with the slide rails 41 of the lifting mechanism 4. A slider with a structure similar to the slider 57 is installed at the bottom of the guide rail. The working platform assembly 3 can slide relative to the lifting mechanism 4, rise or fall. The interior of the intermediate platform 31 is divided into an upper and lower walkway channel through the walkway frame. The top of the upper walkway channel is open, and the front and rear sides are guardrails, and the height of the guardrail is not less than 1.1m.

[0043] The upper walkway channel has a hinged flip platform 34 at both ends, and a variable-length oil cylinder is arranged between the two to push the flip platform 34 to rotate. When the flip platform 34 is perpendicular to the upper walkway channel, the flip platform 34 is retracted in the upper walkway channel to reduce the width of the work platform assembly 3. When the flip platform 34 is parallel to the upper walkway channel, it is spliced ​​at the end of the upper walkway channel to extend the length of the walkway channel. The flip platform 34 is sleeved with a sliding platform 35, and a telescopic oil cylinder is arranged between the two. When the flip platform 34 is parallel to the upper walkway channel, the telescopic oil cylinder pushes the sliding platform 35 to extend or retract relative to the flip platform 34. The sliding platform 36 is sleeved in the sliding platform 35, and a telescopic oil cylinder is arranged between the sliding platform 35 and the sliding platform 36. When the flip platform 34 is parallel to the upper walkway channel, the telescopic oil cylinder pushes the sliding platform 36 to extend or retract relative to the flip platform 35. The lengths of the flip platform 34, the sliding platform 35, and the sliding platform 36 are all greater than 1.1m. More specifically, the lengths of the turning platform 34, the sliding platform 35, and the sliding platform 36 are all greater than 2 meters. When the sliding platform is retracted, the total length is 2.6 meters, and when the sliding platform is extended, the total length is 5.6 meters.

[0044] Similar to the structure and driving device of the upper walkway, the lower walkway has a hinged turning platform 32 at both ends, and a variable amplitude oil cylinder is arranged between the two to drive the turning platform 32 to rotate. A sliding platform 33 is arranged inside the turning platform 32, and a telescopic oil cylinder is arranged between the two. Similarly, the length of the turning platform 32 and the sliding platform 33 are both greater than 3m, and the total length is 3.4m when the sliding platform is retracted, and the length is 5.8m when the sliding platform is extended.

[0045] After the multiple foldable and retractable flip platforms and sliding platforms are unfolded, they can cover the entire width of the face in terms of horizontal amplitude. Together with the vertical lifting of the lifting mechanism 4, they can cover the entire section, which can accommodate at least 10-12 people working at the same time, greatly improving work efficiency. The movable platform is changed to two layers, which greatly improves the flexibility of the working device exhibition vehicle and improves the applicability of the product to different working spaces.

[0046] Embodiment 3: Based on Embodiment 1, this embodiment can also have the following variations: Figure 2 The support leg assembly 2, the box 7 and the auxiliary multifunctional system can be connected to the fixed frame. The support leg assembly 2 includes four legs: the front left leg, the front right leg, the rear left leg and the rear right leg. The front and rear legs have the same structure and include horizontal telescopic legs 21, 22, 23, 24 and vertical telescopic legs 25, 26, 27, 28. The vertical telescopic legs are installed at the front end of the horizontal telescopic legs (the extended end is the front end). Figure 3The front end of the fixed frame 6 is equipped with a front leg fixing box 68 for connecting the front left and right horizontal telescopic legs 22 and 21 of the support leg assembly 2, and the rear end is equipped with a U-bolt connection seat 65 for connecting the rear left and right horizontal telescopic legs 27 and 28 of the support leg assembly 2. The horizontal telescopic legs are extended and retracted by the horizontal telescopic oil cylinder. After being extended horizontally, the tilting line of the fixed frame 6 and other structures installed on the fixed frame 6 is moved outward, thereby improving the overturning stability of the whole vehicle; the four vertical telescopic legs are lifted and lowered by the vertical telescopic oil cylinder. The lifting and lowering of the vertical telescopic legs changes the height of the entire equipment, which can be raised to a maximum height of 3.2m, increasing the construction work space and meeting the construction of higher step surfaces. The front left and right horizontal telescopic legs 22 and 21 slide in the front leg fixing box 68 of the fixed frame 6, and the rear left and right horizontal telescopic legs 27 and 28 are fixed to the rear leg U-bolt connection seat 65 with U-bolts.

Claims

1. A tunnel work platform assembly support mechanism, comprising a fixed frame (6) for connecting to a transfer vehicle body, a movable frame (5) slidably connected to the fixed frame (6), It is characterized in that The movable frame (5) is formed by splicing a head (52) box structure and a tail; the middle portion of the fixed frame (6) in the length direction is concave, and two side walls of the concave portion are symmetrically provided with first slide rails (63) for sleeve-connecting the head of the movable frame; the tail of the movable frame (5) is used for articulating the working platform assembly (3); the movable frame (5) slides along the first slide rails (63) to push the working platform assembly (3) to move laterally.

2. The tunnel work platform assembly support mechanism according to claim 1, It is characterized in that The first slide rail (63) comprises a first slot plate (631) with a transverse opening and a C-shaped longitudinal section. The top and bottom of the first slot plate (631) are respectively spliced ​​with L-shaped bent plates to form a square tube structure. The height of the square tube structure at the bottom of the first slot plate is greater than the height of the square tube structure at the top. The two sides of the movable frame (5) are sleeved between the square tube structures.

3. The tunnel work platform assembly support mechanism according to claim 2, It is characterized in that A plurality of first cross beams are provided at the top and bottom of the first slide rail (63); the top of the tail of the first slide rail (63) is lowered to form a bracket, and when the head (52) of the movable frame (5) is inserted into the first slide rail (63), the tail of the movable frame is placed on the bracket.

4. The tunnel work platform assembly support mechanism according to claim 1, It is characterized in that A plurality of vertical plates (523) are arranged inside the head (52) box structure. The vertical plates (523) are parallel to the width direction of the movable frame (5) and divide the box structure of the head (52) into a plurality of sub-boxes. A first through hole is arranged in the middle of the vertical plates (523) for a driving mechanism that drives the movable frame (5) to slide to pass through.

5. The tunnel work platform assembly support mechanism according to claim 1, It is characterized in that A first platform frame (56) is cantilevered and extends to the head of the movable frame at the rear end of the movable frame (5), and a roller is provided at the front end of the first platform frame (56), which is overlapped with the fixed frame (6), and the movable frame (5) slides along the fixed frame (6), and the first platform frame (56) and the fixed frame (6) are spliced ​​to form a bridge for entering the working platform assembly (3).

6. The tunnel work platform assembly support mechanism according to claim 1, It is characterized in that The front end of the fixed frame (6) is provided with a counterweight (61), the outer side of the first slide rail (63) is provided with a cantilevered second walkway frame, and the rear end of the movable frame (5) is provided with a rear support leg (54), and when the movable frame is extended to the upper step, the rear support leg (54) is extended.

7. The tunnel work platform assembly support mechanism according to claim 1, It is characterized in that A plurality of first sliding blocks for supporting the sliding of the movable frame (5) are provided inside the rear end of the first slide rail (63) and at the front end of the movable frame (5); the first sliding blocks are provided with second through holes for temporarily storing lubricating oil; and the second through holes are surrounded by grooves that are connected to the second through holes and guide the lubricating oil.

8. A tunnel construction vehicle, It is characterized in that It comprises the supporting mechanism of the tunnel working platform assembly as claimed in claim 1, wherein the working platform assembly (3) is hinged to the rear of the movable frame (5) through a lifting mechanism (4), the lifting mechanism (4) is a chord rod (412) with a rectangular cross section and a second cross beam with a rectangular cross section welded to form a truss structure, the upper panel of the chord rod (412) is spliced ​​with a second groove plate (411) with a C-shaped longitudinal section to form a second slide rail (41), and guide rails are provided on both sides of the working platform assembly (3) and are sleeved in the second groove plate (411).

9. The tunnel construction vehicle according to claim 8, It is characterized in that A box-shaped reinforcement structure (413) is provided on the outer side of the top of the second slide rail (41), and a second sliding block supporting the sliding of the working platform assembly (3) is provided inside the top of the second slide rail (41) and outside the bottom of the guide rail, and the second sliding block at the top of the second slide rail (41) is connected to the end face of the reinforcement structure (413).

10. The tunnel construction vehicle according to claim 9, It is characterized in that The working platform assembly (3) comprises an intermediate platform (31), wherein the intermediate platform (31) is provided with an upper and lower walkway passage, and the flipping platforms are symmetrically hinged at both ends of the walkway passage. The flipping platform rotates around the intermediate platform (31) and is recovered into the walkway passage to reduce the width of the working platform assembly, or is spliced ​​with the walkway passage to extend the length of the walkway passage; a sliding platform is sleeved in the flipping platform, and when the flipping platform is spliced ​​with the walkway passage, the sliding platform extends out to further extend the length of the walkway passage. The lengths of the flipping platform and the sliding platform are both greater than 1.1 m.

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