Frame platform for step surface construction

Abstract

The invention discloses a step surface construction vehicle frame platform which comprises a fixed platform used for being connected with a vehicle and a movable vehicle frame platform used for being hinged to a working platform, vertical telescopic supporting legs used for lifting the fixed platform are arranged on the two sides of the front end and the rear end of the fixed platform respectively, and the vertical telescopic supporting legs are connected with the fixed platform through horizontal telescopic supporting legs. A sliding rail is arranged in the middle of the fixed platform, the movable frame platform is sleeved with the sliding rail, and a rear supporting oil cylinder is arranged at the rear end of the movable frame platform. The fixed platform is lifted through the vertical telescopic supporting legs, the height is increased, the front horizontal telescopic supporting legs and the rear horizontal telescopic supporting legs are arranged, the span is increased, the overturning stability of the whole vehicle is improved, the maximum length of the sliding grooves can be consistent with the length of the fixed platform, the length capable of being stretched out of the movable vehicle frame platform is greatly increased, and the transverse operation length is increased; when the movable frame platform extends to the upper step, the rear supporting oil cylinder and the upper step face are matched for supporting, and stability is guaranteed.

Description

Technical Field

[0001] The invention relates to a tunnel operation device, in particular to a frame platform for step surface construction. Background Art

[0002] The face, also known as the face of the tunnel, is a term used in tunnel construction, that is, the working face that is constantly advancing in tunnel excavation, coal mining, mining or tunnel engineering. The step method refers to a construction method in which the upper section of the tunnel is excavated first, and the lower section is excavated after the upper step is advanced by a certain distance, and the upper and lower steps are advanced 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, the working platform on the construction vehicle is required to be able to extend to a sufficient height and length to extend to the upper step.

[0003] The invention patent application with the publication number CN 117184277 A discloses a multifunctional tunnel comprehensive operation vehicle: the fixed platform is connected to the vehicle, there are square box slide rails on both sides of the fixed platform, the two sides of the movable support seat are connected with the square box slide rails in a clamping manner, during construction, the movable support seat is extended relative to the fixed platform, and the operating platform hinged on the movable support seat is pushed to the step surface, and the leg assembly is installed below the tail of the vehicle chassis, and when the movable support seat is extended, the leg assembly is extended to maintain the stability of the operation vehicle. In this scheme, there are the following problems: 1. The device is suitable for the vehicle body to approach the face, and the movable support seat is extended to fine-tune the distance between the operating platform and the face, and it cannot be adapted to the construction of tunnels with steps; 2. The movable frame platform is sleeved in the rear half of the fixed platform, and its own length is limited, and the length that can be extended is limited; 3. After the movable support seat is extended and the operating platform is unfolded, the center of gravity of the construction vehicle moves backward as a whole, and it only relies on the leg assembly fixed below the tail of the vehicle chassis to maintain stability on the lower step, with short torque and limited strength. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a frame platform for step surface construction that can improve the coverage and stability of exhibition vehicles.

[0005] Technical solution: The frame for step surface construction described in the present invention includes a fixed platform for connecting to a car and a movable frame platform for an articulated working platform. Both sides of the front and rear ends of the fixed platform are respectively provided with vertical telescopic legs for lifting the fixed platform. The vertical telescopic legs are connected to the fixed platform through horizontal telescopic legs. A slide rail is provided in the middle of the fixed platform, and the movable frame platform is sleeved in the slide rail. A rear support cylinder is provided at the rear end of the movable frame platform.

[0006] In the present invention, the fixed platform is lifted by vertical telescopic legs, so that the longitudinal height of the construction operation is significantly improved, and front and rear horizontal telescopic legs are arranged, and the span of the vertical telescopic legs is increased, thereby improving the overturning stability of the whole vehicle. The slide groove is arranged in the middle of the fixed platform, and the maximum length of the slide groove can be consistent with the length of the fixed platform, which greatly improves the length that the movable frame platform can extend and the lateral operation length. The rear supporting cylinder is connected to the movable frame platform. When the movable frame platform is extended to the upper step, the rear supporting cylinder and the upper step surface cooperate to support, thereby ensuring stability and reducing the volume of the rear supporting cylinder.

[0007] Preferably, in order to further improve the overall stability when the movable frame platform is extended, a counterweight is provided on the upper surface of the front end of the fixed platform.

[0008] Preferably, in order to achieve sufficient strength so that the movable frame platform supporting the activity can be extended to a sufficient length, and at the same time ensure the connection strength between the extended movable frame platform and the fixed platform when the fixed platform is longitudinally lifted; the slide rail is formed by symmetrically arranged, transversely opened C-shaped plates, and the top and bottom of the inner side of the C-shaped plate are respectively spliced ​​with bent plates to form an upper tube and a lower tube, and the movable frame platform is located between the upper tube and the lower tube.

[0009] Preferably, in order to improve the strength of the slide rail and facilitate the installation of the walkway, the height of the lower tube is greater than the height of the upper tube, the height of the lower tube is not less than 160 mm, and a number of beams are provided between two adjacent upper tubes and two adjacent lower tubes.

[0010] Preferably, in order to facilitate the installation of other accessories, the outer side wall of the C-shaped plate is provided with a cantilevered frame structure, the rear end portion of the C-shaped plate is cut away to form a bracket for supporting the movable frame platform with the frame structure, and the cut-out portion of the C-shaped plate is surrounded by a rib plate.

[0011] Preferably, in order to ensure stable sliding of the movable frame platform without abnormal noise, a first sliding block is provided on the bottom surface of the upper tube, the top surface of the upper tube, and the inner wall of the C-shaped plate. The first sliding block is a rectangular block with a plurality of through holes in the middle and recessed grooves around the through holes.

[0012] Preferably, in order to ensure the stability and bearing strength of the movable frame platform itself, and at the same time ensure the connection strength between the extended movable frame platform and the fixed platform when the fixed platform is longitudinally lifted, the head of the movable frame platform is a box-type structure, and the head is composed of top and bottom flat plates, and directional guide rails with rectangular cross-sections on both sides to form a box-type structure. The box-type structure is provided with a vertical plate that divides the inner cavity of the box-type structure into a plurality of sub-boxes, and the directional guide rails are sleeved in the slide rails.

[0013] Preferably, in order to reduce friction and ensure smooth sliding without abnormal noise, a second slider is provided at the front end of the directional guide rail. The second slider cooperates with the first slider to reduce friction between the directional guide rail and the slide rail.

[0014] Preferably, a driving mechanism connected to the fixed platform and driving the movable frame platform to slide is provided in the head of the movable frame platform, and a through hole for the driving mechanism to pass through is provided in the middle of the vertical plate.

[0015] Preferably, the rear part of the movable frame platform is formed by splicing the first square box and the second square box at the front and rear ends, and the frames in the middle of the first square box and the second square box. A connecting seat for articulating the working platform is provided on the top of the first square box near the head. A cantilevered walkway frame extending toward the head is provided on the outer side wall of the first square box. Rollers are connected to the front end and the bottom surface of the walkway frame, and the rear supporting cylinder is connected to the second square box away from the head.

[0016] Preferably, a U-shaped bolt connection seat is provided at the rear end of the fixed platform, and the top of the horizontal telescopic leg of the vertical telescopic leg at the rear end of the fixed platform is connected to the bottom of the fixed platform through bolts, the U-shaped bolt connection seat, and the fixed platform to match the chassis beam of the automobile.

[0017] Preferably, the U-bolt connection seat is connected to the outer wall of the C-shaped plate and the lower tube side wall.

[0018] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. Improve the coverage and stability of the exhibition vehicle: the vertical telescopic legs are installed on the fixed platform, and the upper working platform can be raised by a maximum of 3.2m, which increases the construction work space in the tunnel height direction and easily solves the problem of micro-steps; the slide rails are arranged in the fixed platform, and the sliding range of the movable frame platform is 5m, which is enough to extend to the step face; the rear support cylinder is arranged on the movable frame platform instead of the fixed platform or the vehicle body, and the rear support cylinder can extend to the step surface to support the movable frame platform, so that the stability of the whole vehicle is higher and the stability of the working platform is higher; 2. Improved bearing capacity: rectangular tubes are arranged above and below to effectively improve the strength and bearing capacity of the slide rails, the slide rails have a large cross-section, the strength is improved, and the extension strength is increased; the movable frame platform is a box-type structure, and the two cooperate to ensure the bearing capacity regardless of whether it is lifted longitudinally; 3. Improved safety: the horizontal span of the vehicle is adjusted by adjusting the height adjustment center of the horizontal telescopic legs and the length of the horizontal telescopic legs, so as to improve the safety factor of the overturning stability of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the vehicle frame platform of the present invention in a vehicle-retracting state;

[0020] Figure 2 It is a schematic diagram of the vehicle frame platform of the present invention in an unfolded state;

[0021] Figure 3 It is a schematic diagram of the fixed platform structure of the present invention;

[0022] Figure 4 It is an enlarged view of the local structure of the tail of the fixed platform slide rail of the present invention;

[0023] Figure 5 It is a schematic diagram of the connection between the fixed platform and the front outrigger box of the present invention;

[0024] Figure 6 It is a schematic diagram of the connection between the fixed platform and the rear outrigger box of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the movable frame platform of the present invention;

[0026] Figure 8 It is an enlarged view of the local structure of the square box-shaped sliding guide rail of the movable frame platform of the present invention. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0028] like Figure 1 , Figure 2 The fixed platform 1 is installed on the second-class chassis of the automobile through the connecting plate with bolts, and is the base of the movable frame platform 2 and the upper device. The fixed platform 1 can be installed with boxes such as tool boxes, control boxes, and electric control boxes to achieve multi-functional bearing. The fixed platform is provided with supporting leg assemblies 2 around it, and the movable frame platform 2 is sleeved in the fixed platform 1.

[0029] like Figure 2 The supporting leg assembly 2 includes four legs: front left leg, front right leg, rear left leg, and rear right leg. The front and rear legs have the same structure, including horizontal telescopic legs 31, 35, 33, 37 and vertical telescopic legs 32, 36, 34, 38. The vertical telescopic legs are installed at the front end of the horizontal telescopic legs (the extended end is the front end). The horizontal telescopic legs are extended and retracted by the horizontal telescopic oil cylinder. After being extended horizontally, the tipping line of the fixed platform 1 and other structures installed on the fixed platform 1 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, thereby increasing the construction work space. The front left and right horizontal telescopic legs 31 and 35 slide in the front leg fixing box 12 of the fixed platform 1, and the rear left and right horizontal telescopic legs 33 and 37 slide in the rear fixed leg box 39 of the fixed platform 1.

[0030] like Figure 3 , Figure 4The fixed platform 1 is mainly formed by splicing a middle slide rail 11 and a frame structure skeleton on both sides of the slide rail 11. The slide rail 11 is an embedded slide rail embedded in the fixed platform 1 to facilitate the folding of the vehicle and the installation of the walkway. The slide rail 11 is formed by a transverse opening and a C-shaped plate 111 arranged opposite to each other. The top and bottom of the inner side of the C slide rail 11 are respectively spliced ​​with L-shaped bent plates, so that the top and bottom of the C-shaped plate 111 respectively form an upper tube 113 and a lower tube 114 structure with a rectangular cross-section to enhance the bearing capacity of the slide rail 11. The height of the lower tube 114 is greater than the upper tube 113 to increase the bearing capacity of the C-shaped slide rail 11. The height of the lower tube 114 is preferably greater than 160 mm, and can be 160-190 mm. The height of the movable frame platform 2 is greater than the height of the lower tube 114.

[0031] Sliders 18 are installed on the inner wall of the C-shaped plate 111, the upper surface of the lower tube 114, and the lower surface of the upper tube 113 to support the sliding of the movable frame platform 2. The slide 18 is a nylon slide. The main body is a rectangular block with a number of blind holes / through holes in the middle to store lubricating oil. Each blind hole / through hole is surrounded by a sink groove, which is used to connect two adjacent blind holes / through holes. The sink groove is equivalent to an oil channel, which evenly guides the oil in the blind holes / through holes so that it evenly covers the surface of the slide 18, reduces friction, and ensures that the movable frame platform 2 slides more smoothly without abnormal noise. Several crossbeams are arranged between the two upper tubes 113 and the two lower tubes 114, and the crossbeams are arranged along the width of the fixed platform 1. Baffles with a height less than the slider are arranged around the slider 18 to reinforce the slider and reduce the shear force that causes the slider to fall off.

[0032] The skeleton is arranged on both sides of the slide rail 11 and connected to the outer wall of the slide rail 11. The skeleton is formed by splicing a skeleton beam 17 and a chord rod to form a frame structure. The skeleton beam 17 is perpendicular to the slide rail 11, one end is connected to the outer side of the slide rail 11, and the other end is connected to the chord rod. The skeleton beam 17 is the base for the installation of peripheral boxes and other auxiliary structures. A support frame 16 is installed on the skeleton beam 17, and a vehicle ladder 15 is connected between the skeletons of the slide rail 11. The vehicle ladder 15 ensures that construction workers can get on the vehicle smoothly and safely to work.

[0033] The end of the extended movable frame platform 2 supported by the fixed platform 1 is the tail end. The C-shaped plate 111, the upper tube 113 and the tail part of the fixed platform 1 are cut off. The frame heights on both sides of the tail of the slide rail 11 are lowered to form a bracket to support the retracted movable frame platform 2. The cut-off part of the tail of the C-shaped plate 111 has an L-shaped notch. The vertical side branches of the L-shaped notch are wrapped with ribs 112 to prevent the notch from bursting. Figure 6 The inner wall of the lower tube 114 and the outer wall and bottom of the C-shaped plate 111 are welded with a plurality of rear leg U-shaped bolt connection seats 13, which are used to cooperate with the bolts to install the rear fixed leg box 39. The upper surface of the front end of the fixed platform 1 is provided with a counterweight 14, and the end face is connected to the front leg fixing box 12.

[0034] like Figure 7 The movable frame platform 2 is a two-section structure, the first section is the head 21, which is a box structure, and the second section is the tail, which is a box frame mixed structure. Figure 8 , is an enlarged view of the structure of the head 21 of the movable frame platform 2. The main body of the head 21 is a box structure, the top and bottom surfaces are both flat plates 212, and the two sides are connected with rectangular cross-section direction guide rails 211. The box structure of the head 21 is provided with a plurality of vertical plates 213 perpendicular to the flat plates 212 and parallel to the width direction of the movable frame platform 2. The vertical plates 213 divide the box structure of the movable frame platform 2 into a plurality of sub-boxes, and the middle of the vertical plates 213 is provided with a through hole for the driving mechanism 4 to pass through. The main body of the head 21 is a box structure, and the interior is divided into a plurality of sub-square boxes, which maximizes the rigidity and anti-bending and anti-torsion capabilities of the movable frame platform, increases the strength and rigidity of the platform base after sliding out, and improves the performance. The side wall, upper surface, and lower surface of the front end of the direction guide rail 211 are provided with a slider similar to the slider 18. The slider of the direction guide rail 211 cooperates with the slider 18 to support the movable frame platform 2 to slide in the slide rail 11. Similarly, a blocking bar is also provided around the slider to prevent the slider from falling off due to shear force. The direction guide rails 211 on both sides of the head 21 are sleeved in the C-shaped slide rails 11, so that the movable frame platform 2 and the fixed platform 1 form a sliding connection. The head 21 has a driving mechanism 4 inside, and the driving mechanism 4 drives the movable frame platform 2 to slide. The driving mechanism 4 can be a telescopic cylinder 4. The movable frame platform 2 and the fixed platform 1 can also be telescopically moved by a motor sprocket box and a roller chain or other similar mechanisms. In order to ensure the carrying capacity of the movable frame platform 2, the head height is not less than 300 mm, and can be 300-340 mm.

[0035] The rear part of the movable frame platform 2 is formed by splicing a square box and a frame. The front and rear ends of the frame are square box structures. The front square box is used to connect with the head of the movable frame platform 2 and support the upper device. The structure formed by splicing the square box and the frame can enhance the overall bearing capacity and stability in the left and right directions. The rear end of the tail (away from the head 21) square box is connected to the rear support cylinder 22. During operation, the driving mechanism 4 pushes the movable frame platform 2 out, and the movable frame platform 2 extends to the step, pushing the upper working platform to the tunnel face. The rear support cylinder 22 extends out and stands on the step to support the rear part of the movable frame platform 2, thereby improving the overall rigidity and operation stability.

[0036] The side wall of the front square box at the tail end near the head 21 is connected to a cantilevered walkway frame 24 extending toward the head 21. A walkway board (not shown) is laid on the walkway frame 24. A nylon roller is provided at the front end of the walkway frame 24. The nylon roller overlaps the fixed platform 1 and can roll along the fixed platform 1 to support the walkway frame 24. When the movable frame platform 2 slides out along the fixed platform 1, the walkway frame 24 is spliced ​​with the front end of the fixed platform 1 to form a bridge to enter the upper device, which is convenient for the staff to move above the platform. A connecting seat 23 and a lifting cylinder 25 are provided above the front square box at the tail end. The connecting seat 23 is used to articulate the upper device, and the lifting cylinder 25 is used to push the upper device to rotate around the movable frame platform 2, changing from a horizontal state to an upright exhibition vehicle state.

[0037] In the present invention, the driving form is not limited to the oil cylinder, and can also be a chain drive, a belt drive, a rack and pinion drive, a cable drive or the like.

Claims

1. A frame platform for step surface construction, comprising a fixed platform (1) for connecting to a car, and a movable frame platform (2) for articulating a working platform, characterized in that: Vertical telescopic legs for lifting the fixed platform (1) are respectively provided on both sides of the front and rear ends of the fixed platform (1); the vertical telescopic legs are connected to the fixed platform (1) via horizontal telescopic legs; a slide rail (11) is provided in the middle of the fixed platform (1); the movable frame platform (2) is sleeved in the slide rail (11); and a rear support cylinder (22) is provided at the rear end of the movable frame platform (2).

2. The frame platform for step surface construction according to claim 1, characterized in that: The slide rail (11) is formed by enclosing symmetrically arranged, transversely open C-shaped plates (111), the top and bottom of the inner side of the C-shaped plates (111) are respectively spliced ​​with bent plates to form an upper tube (113) and a lower tube (114), and the movable frame platform (2) is located between the upper tube and the lower tube.

3. The frame platform for step surface construction according to claim 2, characterized in that: The height of the lower tube (114) is greater than that of the upper tube (113), and the height of the lower tube (113) is not less than 160 mm. A plurality of cross beams are arranged between two adjacent upper tubes (113) and two adjacent lower tubes (114).

4. The frame platform for step surface construction according to claim 2, characterized in that: The outer side wall of the C-shaped plate (111) is provided with a cantilevered frame structure, the rear end portion of the C-shaped plate (111) is cut away to form a bracket for supporting the movable frame platform together with the frame structure, and a rib plate (112) surrounds the cutout portion of the C-shaped plate (111).

5. The frame platform for step surface construction according to claim 2, characterized in that: A first sliding block (18) is provided on the bottom surface of the upper tube (113), the top surface of the lower tube (114), and the inner wall of the C-shaped plate (111). The first sliding block is a rectangular block. A plurality of through holes are provided in the middle of the first sliding block, and sink grooves are provided around the through holes.

6. The frame platform for step surface construction according to claim 1, characterized in that: The head (21) of the movable frame platform (2) is a box-shaped structure, which is formed by splicing top and bottom flat plates (212) and directional guide rails (211) on both sides with rectangular cross-sections. A vertical plate (213) is provided inside the box-shaped structure to divide the inner cavity of the box-shaped structure into a plurality of sub-boxes, and the directional guide rail (211) is sleeved in the slide rail (11).

7. The frame platform for step surface construction according to claim 6, characterized in that: A driving mechanism connected to the fixed platform (1) and driving the movable frame platform to slide is arranged in the head portion (21) of the movable frame platform, a through hole for the driving mechanism to pass through is arranged in the middle of the vertical plate (213), and a second sliding block is arranged at the front end of the directional guide rail (211).

8. The frame platform for step surface construction according to claim 6, characterized in that: The rear part of the movable frame platform (2) is formed by splicing the first square box and the second square box at the front and rear ends, and the frame in the middle. The top of the first square box close to the head is provided with a connecting seat (23) for articulating the working platform. The side wall is provided with a cantilevered walkway frame (24) extending toward the head. The front end and bottom surface of the walkway frame are connected to rollers. The rear supporting cylinder is connected to the second square box far away from the head.

9. The frame platform for step surface construction according to claim 1, characterized in that: A U-shaped bolt connection seat (13) is provided at the rear end of the fixed platform (1), and the top of the horizontal telescopic leg at the rear end of the fixed platform (1) is connected to the bottom of the fixed platform (1) via bolts, the U-shaped bolt connection seat (13) and the bottom of the fixed platform (1).

10. The frame platform for step surface construction according to claim 1, characterized in that: A counterweight (14) is provided on the upper surface of the front end of the fixed platform (1).

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