Self-propelled multifunctional work vehicle for shield tunnel construction

Abstract

The present invention provides a self-propelled multifunctional work vehicle for shield tunnel construction. The work vehicle includes a traveling mechanism, a gantry support frame, a top working platform, a left working platform, a right working platform, a lifting device and a hydraulic system. The gantry support frame includes left and right vertical supports and a horizontal support. The wheel bodies of the main driving wheel and the driven wheel of the traveling mechanism are respectively connected to the corresponding mounting supports through a deflection mechanism and can realize deflection. Each traveling wheel is provided with a turning cylinder. The lifting device includes an electric hoist, a traveling track, an electric hoist traveling mechanism and an electric control box. The traveling track is installed between the tops of the left and right vertical supports. The present invention can freely walk directly on the tunnel segments without affecting the horizontal construction and transportation of the shield. Its working platform can achieve full working surface coverage of the tunnel section. The work vehicle can be used as a construction platform, a hoisting device, a carrying platform and a transportation device. One vehicle has multiple uses.

Description

Technical Field

[0001] The invention relates to a shield construction working vehicle, in particular to a self-propelled multifunctional working vehicle for shield tunnel construction. Background Art

[0002] With the development of domestic urban rail transit construction, shield construction technology has developed rapidly in my country. At present, most tunnel construction uses shield machines for excavation. Since the inner diameter of the shield is mostly greater than 5.5m, and the segments are annular, many workstations cannot be completed on the bottom plate or on the upper part during the shield excavation process. For example, there are inevitable errors in the installation of shield segments, and as the shield machine advances, the grouting of the segment installation will also cause water leakage, so it is necessary to repair the segments and perform secondary grouting. During the shield tunnel excavation construction, synchronous grouting is required. Because synchronous grouting is accompanied by indispensable quality defects such as large-scale cavities, the segments produce concentrated loads, which increases the safety risk of the tunnel. In order to ensure the overall force of the segments, it is also necessary to perform secondary grouting on the segment wall in time. Moreover, after the segments are assembled, in order to prevent the settlement, floating and deformation of the formed segments, the segment bolts need to be tightened again. In addition, the segments will be stained with a lot of mud or the grease of mechanical construction during the installation process, so the segments need to be cleaned after the segments are assembled. Since the grouting holes are distributed in a circular shape on the pipe segments, the grouting work in the middle and upper parts, as well as the repair and cleaning work of the middle and upper pipe segments, need to be completed with the help of auxiliary mechanisms. Due to the particularity of shield tunnels, the traditional way of high-altitude operations in shield tunnels is to use herringbone ladders, single-sided ladders, temporary scaffolding, assembled portal frames, etc. Most of these high-altitude operation auxiliary brackets have many unsafe factors, and most of them are only temporary constructions, which can only meet the needs of point-to-surface construction, and are difficult to move, poor in mobility, low in efficiency, poor in stability, and low in safety, and cannot meet the requirements of full-tunnel and full-section construction; and shield tunnels also need to pass through tunnel construction equipment such as battery vehicles, and the temporary construction of high-altitude work platforms will also affect the normal construction of other equipment in the tunnel.

[0003] Patent announcement number "CN10808700B" discloses a shield secondary grouting operation system, and further discloses a grouting operation platform, which includes a bracket installed on both sides of the tunnel rails, and the grouting platform is located above the tunnel rails. The grouting operation platform in this patent is fixedly installed in the tunnel. After each grouting is completed, it needs to be removed and then installed again, which is troublesome and increases the construction period. Patent announcement number "CN208605196U" discloses a shield tunnel construction mobile operation platform, which includes left and right walking wheel frames, left and right support frames, top platform, left and right platform brackets and hanging ladders; Patent announcement number "CN207934907U" discloses a track-type pipe segment repair trolley, including a frame, walking rails and rail pads. The walking rails are laid on both sides of the track of the track trolley, and the frame is placed on the walking rails. A work platform is set on the frame. Although the working platforms disclosed in the above two patents can be moved, the tread of the tire cannot effectively contact the curved surface when the running wheels walk on the curved surface because the segments are curved, which accelerates the wear of the tires. In addition, there are some uneven positions such as bolt holes on the segments, so it is necessary to lay corresponding tracks on the shield segments for the operation of infrastructure equipment. The laying of temporary tracks not only consumes a lot of manpower and material resources, but also occupies a large space inside the tunnel, making the space inside the shield tunnel even more tense.

[0004] In addition, the main function of the existing tunnel construction vehicles and work platforms is to build an aerial work platform to facilitate construction personnel to repair, clean and grout the pipe segments in the middle and upper parts of the tunnel; and during the shield construction process, battery car running tracks and other temporary brackets built on rails will be installed. When the shield is withdrawn, the dismantled rails, sleepers, and pipes need to be hoisted and transported. There are also some daily materials and tools in the tunnel that need to be hoisted. It is troublesome to set up hoisting equipment and hoisting brackets. Moreover, during the shield construction process, there are some construction equipment, such as dual-liquid grouting pumps, cleaning machines, air compressors, jacks, mud and water collection devices, etc. These equipment need to set up temporary construction platforms during the construction process. The erection and dismantling of these platforms are cumbersome, which will greatly increase the cost of manpower and material resources. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a self-propelled multifunctional working vehicle for shield tunnel construction. The working vehicle can directly move forward, backward, turn, brake and park on the arc-shaped segments of the shield tunnel, thereby avoiding the consumption of manpower and material resources caused by building temporary tracks and the occupation of tunnel space. The working vehicle can be flexibly moved in the tunnel without affecting normal tunnel construction. Moreover, the working vehicle in the present invention can also simultaneously realize multiple auxiliary functions such as lifting materials in the tunnel, carrying equipment, repairing and cleaning high-altitude segments, and grouting high in the tunnel, thereby achieving the purpose of one vehicle with multiple uses.

[0006] In order to achieve the above technical objectives, the present invention provides a self-propelled multifunctional working vehicle for shield tunnel construction, the working vehicle comprising a traveling mechanism, a gantry support frame, a construction working platform and a lifting device;

[0007] The gantry support frame includes a left vertical support, a right vertical support and a horizontal support connected to the top of the two vertical supports;

[0008] The walking mechanism includes left and right walking brackets and a brake mechanism symmetrically arranged at the bottom of two vertical brackets of the gantry support frame. The left and right walking brackets each include a support platform, a turning mechanism, a main driving wheel and a driven wheel. The left vertical bracket and the right vertical bracket are fixedly mounted on the support platform of the corresponding side walking bracket. The main driving wheel is mounted on the front of the bottom of the support platform through a first mounting bracket, and the driven wheel is mounted on the rear of the bottom surface of the support platform through a second mounting bracket. The wheel bodies of the main driving wheel and the driven wheel are respectively connected to the corresponding mounting brackets through a deflection mechanism, and can be turned under the action of the deflection mechanism. The left and right walking brackets are deflected in the same direction at the same time, and the main driving wheels of the left and right walking brackets are deflected to form an eight-shaped shape; the turning mechanism includes a front wheel turning cylinder installed at the main driving wheel of each walking bracket and a rear wheel turning cylinder installed at the driven wheel of each walking bracket, the front wheel turning cylinder is fixedly installed on the supporting platform at the rear side of the main driving wheel, and its piston end is hinged to the first mounting bracket, and the rear wheel turning cylinder is fixedly installed on the supporting platform in front of the driven wheel, and its piston end is hinged to the second mounting bracket; the brake mechanism is installed on the main driving wheel of one of the walking brackets;

[0009] The construction work platform includes a top work platform, a left work platform and a right work platform, wherein the top work platform is laid flat on a horizontal support, and the left work platform and the right work platform are symmetrically installed on the left vertical support and the right vertical support at a position close to the tunnel segment side and lower than the horizontal support;

[0010] The lifting device includes an electric hoist, a travel track, an electric hoist travel mechanism and an electric control box. The travel track is installed between the top of the left vertical bracket and the right vertical bracket, and the travel track is fixedly connected to the horizontal bracket through a connecting beam; the electric hoist is slidably connected to the travel track through the electric hoist travel mechanism and can travel on the travel track. The electric control box is arranged on a supporting platform on one side and is connected to the electric hoist through a signal line.

[0011] A further technical solution of the present invention: the work vehicle also includes a hydraulic system, a cable reel and a driving position arranged on a supporting platform, the hydraulic system is installed on a vertical bracket on one side, the hydraulic system includes a hydraulic control system and a hydraulic transmission system, which are connected to two front wheel turning cylinders and two rear wheel turning cylinders through hydraulic pipelines and control them; the driving position is arranged at the front or rear of one of the supporting platforms, and a steering wheel, a foot brake and a control panel are provided at the driving position, and a first protective fence is provided around the driving position; the cable reel is installed at the front or rear of the other supporting platform; the control panel is communicatively connected to the electronic control box and the control system of the hydraulic system, and controls the electronic control box and the hydraulic system.

[0012] A further technical solution of the present invention is as follows: the main driving wheel comprises a first mounting bracket, a main driving wheel body, a main driving deflection bracket and a power system mounted in the middle of the main driving wheel body, the main driving wheel body is rotatably connected to the first mounting bracket through the main driving deflection bracket, and a driving wheel positioning mechanism is provided at the connection; the power system comprises a hydraulic motor and a reduction box, the main driving wheel deflection bracket is a hollow bracket, a rotating shaft hole is provided in the middle of the main driving wheel hub bracket, the hydraulic motor is fixedly mounted on the hollow part of the main driving wheel hub bracket through a first hexagon socket screw, and its power output shaft is in the middle of the main driving wheel hub bracket through the first hexagon socket screw; the hydraulic motor is connected to the hydraulic system through a hydraulic pipeline, or is connected to an external hydraulic transmission system and a hydraulic control system; the driven wheel comprises a second mounting bracket, a driven wheel deflection bracket and a driven wheel body, the central rotating shaft of the driven wheel body is fixedly connected to the central rotating shaft of the driven wheel deflection bracket, and is rotatably connected to the second mounting bracket through the driven wheel deflection bracket, and a driven wheel positioning mechanism is provided at the connection position.

[0013] The preferred technical solution of the present invention is as follows: the lifting device is provided with two groups, which are symmetrically arranged in front and behind the gantry support frame, and a supporting beam is provided between the walking tracks of the two groups of lifting devices. There are two supporting beams, which are arranged in parallel at the ends of the walking tracks, and each supporting beam is also connected to the horizontal support by a connecting beam; the two sets of lifting devices are controlled by an electric control box.

[0014] The preferred technical solution of the present invention is as follows: the bottom of the left working platform and the right working platform are both provided with a support frame, the left working platform and the right working platform are laid flat and welded to the upper surface of the support frame on the corresponding side, the support frame is connected to the vertical support on the corresponding side by a self-locking hinge, and can drive the working platform on the corresponding side to fold upward or downward 90°; the length of the top working platform is greater than the width between the two vertical supports of the gantry support frame, and the left working platform and the right working platform are arranged at 1 / 2 to 2 / 3 of the vertical support The height is the same as that of the top working platform, and the side edges of the two working platforms extend out on both sides of the top working platform. Second guardrails are respectively provided on the edges of the top working platform, the left working platform and the right working platform; a left ladder is provided between the left working platform and the left walking frame, the lower end of the left ladder is fixed on the left supporting platform, and the upper end is fixed on the left working platform; a right ladder is provided between the right working platform and the right walking frame, the lower end of the right ladder is fixed on the right walking frame, and the upper end is fixed on the right working platform; a top platform ladder is provided between the top working platform and the left working platform or the right working platform or the two working platforms, and a crawling window is opened at the position of the top working platform corresponding to the top platform ladder.

[0015] The preferred technical solution of the present invention is as follows: the brake mechanism includes a brake bracket, a brake pad, a threaded connecting shaft, a handwheel, a spherical bearing and a brake nut fixed on the brake bracket, the brake bracket is installed on a supporting platform, the handwheel is sleeved above the threaded connecting shaft and fixed by a pressure plate and a fastening screw, the threaded connecting shaft is threadedly connected to the brake nut, and its lower end is fixedly connected to the spherical bearing, the brake pad is fixedly installed at the lower end of the spherical bearing, and when the handwheel is rotated, the brake pad is controlled to descend through the threaded connecting shaft and the brake nut to contact the wheel surface of the main driving wheel for braking.

[0016] A better technical solution of the present invention is as follows: a plurality of mounting holes for fixing the gantry support frame are provided on the surface of the support platform, the bottoms of the left vertical bracket and the right vertical bracket are fixedly mounted on the support platform by bolts, and the distance between the two vertical brackets is greater than the width of the locomotive vehicle traveling in the tunnel; a first cylinder mounting plate is provided at the bottom of the support platform near the main driving wheel, a first cylinder ear plate is provided on the side of the first mounting bracket near the front wheel turning cylinder, the front wheel turning cylinder is fixedly mounted on the first cylinder mounting plate, and a piston end thereof is mounted on the first cylinder ear plate through a rotating shaft; a second cylinder mounting plate is provided at the bottom of the walking bracket near the driven wheel, a second cylinder ear plate is provided on the side of the second mounting bracket near the rear wheel turning cylinder, the rear wheel turning cylinder is fixedly mounted on the second cylinder mounting plate, and a piston end thereof is mounted on the second cylinder ear plate through a rotating shaft.

[0017] A better technical solution of the present invention: the electric hoist travel mechanism includes a monorail trolley and a travel motor, and the monorail trolley is driven by the travel motor to travel on the travel track, and the electric control box is connected to the control end of the travel motor through a signal line.

[0018] A further technical solution of the present invention is as follows: the main driving wheel body and the driven wheel body are both rubber wheel bodies, including a rubber roller and a wheel hub bracket; the main driving wheel body and the driven wheel body are simultaneously deflected 0 to 60 degrees in the radial direction of the wheel body, and the wheel bodies of the two walking mechanisms are deflected in opposite directions and at the same deflection angle.

[0019] The preferred technical solution of the present invention is as follows: the first mounting bracket and the second mounting bracket are both composed of a horizontal mounting plate and a vertical adjustment bracket perpendicular to the mounting plate, the adjustment bracket is a grooved plate welded from three vertical steel plates, two of which are parallel to each other and have corresponding rotating shaft holes, the main driving wheel deflection bracket and the driven wheel deflection bracket have corresponding rotating shaft holes, the main driving wheel deflection bracket and the driven wheel deflection bracket are respectively embedded between the two parallel plates of the corresponding adjustment brackets, and are rotatably connected through the rotating shaft; the driving wheel positioning mechanism and the driven wheel positioning mechanism both include a locking pin, at least two limit adjustment holes arranged on the two parallel plate surfaces of the adjustment bracket, and a positioning hole arranged on the corresponding deflection bracket, and during the rotation of the deflection bracket, its positioning holes correspond to different limit adjustment holes, and are fixed and locked by the locking pin; a plurality of bolt holes fixedly connected to the support platform are opened on the mounting plate, and the plate is fixedly installed at the bottom of the support platform through a plurality of fastening bolts.

[0020] Beneficial effects of the present invention:

[0021] (1) The traveling mechanism of the present invention has its own driving mechanism and turning mechanism, and can be used as the traveling mechanism of the shield working vehicle to move forward, backward, turn, brake and park at will in the shield tunnel; its driving mechanism adopts a hydraulic motor, which has the characteristics of simple structure, uniform and stable transmission speed, and stepless speed change.

[0022] (2) The angle of the wheel body part of the running wheel of the present invention that contacts the ground can be adjusted to achieve deflection or resetting. The running wheel can run on a flat surface or on a curved surface with an arc, ensuring that the tread of the tire can effectively contact the curved surface when the wheel body runs on the curved surface, thereby avoiding wear of the wheel body. The running wheel can run smoothly directly on the shield segment, thus avoiding the consumption of manpower and material resources caused by laying temporary tracks on the shield segment, and saving space inside the tunnel.

[0023] (3) The support frame of the present invention adopts a gantry structure, and vehicles can pass through the bottom, which can realize cross-operation without affecting normal excavation construction.

[0024] (4) The present invention includes two platforms, the top platform can be used for construction on the top of the tunnel, and the platforms on the left and right sides can be used for construction at high places on both sides of the tunnel, thereby providing a construction platform with a full working surface of the tunnel cross section.

[0025] (5) The vehicle body of the present invention is equipped with a lifting device at the front and rear, respectively. The two lifting devices can move left and right on the device and can be operated independently or jointly. This facilitates the lifting of materials and tools in the tunnel on a daily basis, and can also lift and transport the dismantled rails, sleepers, pipes, etc. when the tunnel construction is completed and the vehicle body is exited, thus saving time, effort and manpower.

[0026] (6) The walking mechanism of the present invention is provided with a platform capable of carrying equipment such as a dual-liquid grouting pump, a cleaning machine, an air compressor, a jack, and a mud and water collection device. It can be used to carry supporting equipment for tunnel construction and to transport temporary repair materials and tools.

[0027] (7) The present invention provides a driving position, a steering wheel and a foot brake on the carrying platform, and can manually control the walking direction and walking speed, which is safe and stable, saving time, effort and manpower; and a display screen is installed to display various status information of the platform;

[0028] (8) The running wheels of the present invention are rubber wheels, which have great friction, strong climbing ability, wide wheels, large wheel diameter, and the bolt holes on the pipe segments do not affect the running of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a front structural schematic diagram of the present invention;

[0031] Figure 3 It is a side structural schematic diagram of the present invention;

[0032] Figure 4-1 It is a schematic structural diagram of a gantry type support frame of the present invention;

[0033] Figure 4-2 It is a schematic diagram of the side structure of the gantry type support frame of the present invention;

[0034] Figures 5 to 7 It is a structural schematic diagram of the walking mechanism in the present invention;

[0035] Figure 8 It is a structural schematic diagram of the main driving wheel in the present invention;

[0036] Fig. 9 is a cross-sectional schematic diagram of the main driving wheel in the present invention;

[0037] Fig.10It is a structural schematic diagram of the driven wheel in the present invention;

[0038] Fig.11 is a cross-sectional schematic diagram of the driven wheel in the present invention;

[0039] Fig.12 It is a structural schematic diagram of the travel wheel mounting bracket in the present invention;

[0040] Fig.13 and Fig.14 It is a structural schematic diagram of the brake mechanism in the present invention;

[0041] Fig.15 It is a schematic diagram of the use state of the present invention.

[0042] In the figure: 1 - walking bracket, 101 - mounting hole, 102 - first cylinder mounting plate, 103 - second cylinder mounting plate, 2 - brake mechanism, 201 - brake bracket, 202 - brake pad, 203 - threaded connecting shaft, 204 —handwheel, 205—spherical bearing, 206—brake nut, 207—pressure plate, 208—fastening screw, 3—front wheel turning cylinder, 4—rear wheel turning cylinder, 5—main drive wheel, 501—first mounting bracket, 5010—mounting plate, 5011—adjustment plate, 5012—rotating shaft hole, 5013—first cylinder ear plate, 502—main drive wheel deflection bracket, 503—main drive wheel body, 504—power system, 505—rotating shaft, 506—drive wheel positioning mechanism, 5061—limit adjustment hole, 5062—positioning hole, 507—main drive wheel hub bracket, 508—first hexagon socket screw, 6—driven wheel, 601—second mounting bracket, 6010—second cylinder ear plate, 602—driven wheel positioning mechanism, 603—driven wheel Driving wheel deflection bracket, 604—driven wheel body, 6041—driven wheel hub bracket, 605—second hexagon socket screw, 7—top working platform, 701—top platform ladder, 8—left working platform, 801—left ladder, 9—right working platform, 901—right ladder, 10—left vertical bracket, 11—right vertical bracket, 12—horizontal bracket, 13—electric hoist, 14—travel track, 15—electric hoist travel mechanism, 16—electric control box, 17—driving position, 18—steering wheel, 19—control panel, 20—first protective fence, 21—hydraulic system, 2101—hydraulic system mounting plate, 22—reel, 23—support frame, 24—second protective fence, 25—locomotive vehicle, 26—connecting beam, 27—winding tube, 28—tunnel segment, 29—pedestrian passage, 30—tool box. DETAILED DESCRIPTION

[0043] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Figures 1 to 14The drawings are all of embodiments, which are drawn in a simplified manner and are only used for the purpose of clearly and concisely illustrating the embodiments of the present invention. The technical solutions shown in the following drawings are specific solutions of the embodiments of the present invention and are not intended to limit the scope of the invention claimed for protection. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present invention and simplifying the description, and does 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The embodiment provides a self-propelled multifunctional working vehicle for shield tunnel construction, Figures 1 to 3 As shown, it includes a walking mechanism, a gantry support frame, a construction work platform, a lifting device, a hydraulic system 21, a winding drum 22 and a control system. The gantry support frame is as shown in FIG. Figure 4-1 and Figure 4-2 As shown, it includes a left vertical bracket 10, a right vertical bracket 11 and a horizontal bracket 12 connected to the top of the two vertical brackets, and a hydraulic system mounting plate 2101 is provided on the left vertical bracket 10; Figures 1 to 3As shown, the walking mechanism includes left and right walking brackets and a brake mechanism 2 symmetrically arranged at the bottom of two vertical brackets of the gantry support frame. The left and right walking brackets both include a support platform 1, a turning mechanism, a main driving wheel 5 and a driven wheel 6; the hydraulic system 21 includes a hydraulic pump, a hydraulic control system and a hydraulic transmission system. The hydraulic pump is installed on the hydraulic system mounting plate 2101 to provide hydraulic power for the entire device. The control system includes a driving position 17, a steering wheel 18, a foot brake and a control screen 19. The control screen 19 is connected to the control system of the hydraulic system 21 through wireless signals or wired signals, and the hydraulic system 21 controls it. The driving position 17 is set at the front or rear of the support platform 1 of the walking mechanism on one side. The steering wheel 18 and the foot brake can directly adopt the direction control and foot brake system of a battery car or other motor vehicle, which are all existing technologies. The control handle of the brake mechanism 2 can be directly set next to the driving position as a manual brake mechanism. When it is used as a hand brake mechanism, a foot brake mechanism needs to be set separately; it can also be connected to the foot brake control pedal through a transmission mechanism as a foot brake mechanism. The control panel 19 is fixed in front of the driving position 17 by a bracket, which can facilitate the driver to control the entire equipment. In order to ensure the safety of the driver, a first protective fence 20 is provided around the driving position. The work vehicle itself is equipped with electric control equipment, and can also be used as a work platform for other construction equipment. It needs to be connected to the wires, so a cable reel 22 is installed on the support platform of the walking mechanism. The cable reel is installed at the front or rear of the support platform 1. The power line in the tunnel can be directly connected to the work vehicle through the cable reel 22 to provide electricity, and there will be no problem of wires and cables being entangled. The hydraulic system and the control system provide power and control for the work vehicle, which can realize the forward, backward, turning and braking of the equipment. In order to facilitate the storage of tools, a tool box 30 can be set at the bottom of one or both walking brackets. The height of the tool box 30 is less than the height of the walking wheel and the mounting bracket, and will not affect the normal walking of the walking wheel.

[0047] The supporting platform 1 of each walking support in the embodiment is made of welded metal steel plates, and its width is 30 to 60 cm. It can be directly used as a bearing platform to install shield construction equipment such as a double-liquid grouting pump, a cleaning machine, an air compressor, a jack, and a mud and water collection device. Figures 5 to 7As shown, a plurality of mounting holes 101 are provided at the connection part between the support platform 1 and the gantry support frame, the bottom of the left vertical bracket 10 and the right vertical bracket 11 are fixedly mounted on the support platform 1 by bolts, and the distance between the two vertical brackets is greater than the width of the locomotive vehicle 25 traveling in the tunnel, and the width of the vertical brackets on both sides from the locomotive vehicle 25 is 60 to 70 cm respectively. The main driving wheel 5 is mounted on the front of the bottom of the support platform 1 through the first mounting bracket 501, and the driven wheel 6 is mounted on the rear of the bottom of the support platform 1 through the second mounting bracket 601. The turning mechanism includes a front wheel turning cylinder 3 mounted on the main driving wheel 5 of each traveling bracket and a rear wheel turning cylinder 4 mounted on the driven wheel 6 of each traveling bracket. The front wheel turning cylinder 3 is mounted on the support platform 1 behind the main driving wheel 5, and the rear wheel turning cylinder 4 is mounted on the support platform 1 in front of the driven wheel 6. A first cylinder mounting plate 102 is provided at the bottom of the support platform 1 near the main driving wheel 5, and a first cylinder ear plate 5013 is provided at one side of the first mounting bracket 501 near the front wheel turning cylinder 3. The front wheel turning cylinder 3 is fixedly mounted on the first cylinder mounting plate 102, and its piston end is mounted on the first cylinder ear plate 5013 through a rotating shaft; a second cylinder mounting plate 103 is provided at the bottom of the walking bracket 1 near the driven wheel 6, and a second cylinder ear plate 6010 is provided at one side of the second mounting bracket 601 near the rear wheel turning cylinder 4. The rear wheel turning cylinder 4 is fixedly mounted with the second cylinder mounting plate 103, and its piston end is mounted on the second cylinder ear plate 6010 through a rotating shaft. The hydraulic system 21 is installed on one side of the vertical bracket, and is connected to the two front wheel turning cylinders 3 and the two rear wheel turning cylinders 4 through hydraulic pipelines to provide power and control for the turning cylinders.

[0048] The main driving wheel 5 of the walking mechanism in the embodiment is as follows Figure 8 and Fig. 9 As shown, it includes a first mounting bracket 501, a main driving wheel body 503, a main driving deflection bracket 502 and a power system 504 installed in the middle of the main driving wheel body 503, the main driving wheel body 503 is rotatably connected to the first mounting bracket 501 through the main driving deflection bracket 502, and a driving wheel positioning mechanism 506 is provided at the connection; the power system 504 includes a hydraulic motor and a reduction box, the main driving wheel deflection bracket 502 is a hollow bracket, and a rotating shaft hole is provided in the middle of the main driving wheel hub bracket 507, the hydraulic motor is fixedly installed in the hollow part of the main driving wheel hub bracket 507 through a first hexagon socket screw 508, and its power output shaft is fixed in the middle of the main driving wheel hub bracket 507 through the first hexagon socket screw 508; the hydraulic motor is connected to the hydraulic system 21 through a hydraulic pipeline, or is connected to an external hydraulic transmission system and a hydraulic control system; the driven wheel 6 is as shown in FIG. Fig.10 and Fig.11As shown, it includes a second mounting bracket 601, a driven wheel deflection bracket 603 and a driven wheel body 604. The central rotation axis of the driven wheel body 604 is fixedly connected to the central rotation axis of the driven wheel deflection bracket 603, and is rotatably connected to the second mounting bracket 601 through the driven wheel deflection bracket 603. A driven wheel positioning mechanism 602 is provided at the connection position. The specific structure of the first mounting bracket 501 of the main drive and the second mounting bracket 601 of the driven wheel in the embodiment of the present invention is as follows Fig.12 As shown, they are composed of a horizontal mounting plate 5010 and a vertical adjustment frame 5011 perpendicular to the mounting plate 5010. The adjustment frame 5011 is a grooved plate welded by three vertical steel plates, two of which are parallel to each other and have corresponding shaft holes 5012, and the main driving wheel deflection bracket 502 and the driven wheel deflection bracket 603 have corresponding shaft holes, and the main driving wheel deflection bracket 502 and the driven wheel deflection bracket 603 are respectively embedded between the two parallel plates of the corresponding adjustment frame 5011 and are rotatably connected through the shaft 505; the driving wheel positioning mechanism 50 6 and the driven wheel positioning mechanism 602 both include a locking latch, at least two limit adjustment holes 5061 arranged on two parallel plate surfaces of the adjustment frame 5011, and a positioning hole 5062 arranged on the corresponding deflection bracket. During the rotation of the deflection bracket, its positioning hole 5062 corresponds to different limit adjustment holes 5061 and is fixed and locked by the locking latch; a plurality of bolt holes fixedly connected to the support platform 1 are opened on the mounting plate 5010, and it is fixedly installed at the bottom of the support platform 1 by a plurality of fastening bolts.

[0049] In the working vehicle of the embodiment, the main driving wheel 5 and the driven wheel 6 of the same traveling support can be deflected in the same direction at the same time under the control of the corresponding deflection support, such as Fig.15 As shown, the wheel deflection directions of the left and right walking frames are different, wherein the main driving wheel 5 and the driven wheel 6 of the left walking frame are simultaneously deflected clockwise toward the wheel axle, and the main driving wheel 5 and the driven wheel 6 of the right walking frame are simultaneously deflected counterclockwise toward the wheel axle, and the wheel bodies of the two walking frames have the same deflection angle. After the deflection, the main driving wheels 5 of the left and right walking frames are in an eight-shaped shape, and the driven wheels of the left and right walking frames are also in an eight-shaped shape, ensuring that the wheel bodies of the two walking frames can fully contact the curved surface of the tunnel segment 28 and can directly travel on the tunnel segment 28. In order to increase the contact surface and friction between the wheel body and the tunnel segment 28, so that it can have a better climbing ability and avoid the bolt holes on the segment affecting its normal driving, the main driving wheel body 503 and the driven wheel body 604 of the working vehicle are both set as rubber wheel bodies, including rubber rollers and wheel hub brackets, and the wheel is wide, with a wheel diameter of 600-700 mm, and the wheel diameter is large.

[0050] The brake mechanism 2 of the walking mechanism in the embodiment is as follows Fig.14 and Fig.15As shown, it includes a brake bracket 201, a brake pad 202, a threaded connecting shaft 203, a handwheel 204, a spherical bearing 205 and a brake nut 206 fixed on the brake bracket 201, wherein the brake bracket 201 is installed on the supporting platform 1, the handwheel 204 is sleeved on the top of the threaded connecting shaft 203 and is fixed by a pressure plate 207 and a fastening screw 208, the threaded connecting shaft 203 is threadedly connected to the brake nut 206, and the lower end thereof is fixedly connected to the spherical bearing 205, the brake pad 202 is fixedly installed on the lower end of the spherical bearing 205, and when the handwheel 204 is rotated, the brake pad is controlled to descend through the threaded connecting shaft 203 and the brake nut 206 to contact the wheel surface of the main driving wheel 5 for braking. The brake mechanism 2 is arranged on the main drive wheel 5 near the driving position 17, and its hand wheel 204 can be arranged next to the driving position 17 to facilitate the driver to manually control the brake. The hand wheel 204 can also be set to a gear state and connected to a foot brake pedal through a transmission mechanism. The hand wheel 204 is driven to rotate by stepping on the foot pedal to control the brake pad 202 to contact the main drive wheel 5 with the subject surface for braking.

[0051] The construction work platform in the embodiment includes a top work platform 7, a left work platform 8 and a right work platform 9. All three work platforms are square platforms. The bottoms of the left and right work platforms 8 and 9 are provided with support frames 23. The left work platform 8 and the right work platform 9 are laid flat and welded to the upper surface of the support frames 23 on the corresponding sides. The support frames 23 are connected to the vertical brackets on the corresponding sides through self-locking hinges, and can drive the work platform on the corresponding side to fold up or down 90 degrees to achieve the folding of the platform. Figures 1 to 3As shown, the top working platform 7 is laid on the horizontal support 12, and the left working platform 8 and the right working platform 9 are symmetrically installed on the left vertical support 10 and the right vertical support 11 near the tunnel segment side and lower than the horizontal support 12; the length of the top working platform 7 is greater than the width between the two vertical supports of the gantry support frame, the left working platform 8 and the right working platform 9 are arranged at 1 / 2 to 2 / 3 of the height of the vertical support, and the side edges of the two working platforms extend out of the two sides of the top working platform 7, and the second guardrails 24 are respectively arranged on the edges of the top working platform 7, the left working platform 8 and the right working platform 9, and the second guardrails 24 of the left working platform 8 and the right working platform 9 are arranged on three sides, and the side of the working platform on both sides connected to the gantry support frame is not provided with a guardrail, and a corresponding ladder is arranged on this side, wherein the lower end of the left ladder 801 is fixed on the support platform 1 of the left walking support, and the upper end is fixed on the left working platform 8, and the lower end of the right ladder 901 is fixed on the support platform 1 of the right walking support, and the upper end is fixed on the right working platform 9. A second guardrail 24 is provided on the front and rear sides of the top working platform 7. A top platform ladder 701 is provided between the top working platform 7 and the two working platforms. The top platform ladder 701 is arranged at the diagonal position of the top working platform 7, and a crawling window 702 is opened on the top working platform 7 at a position corresponding to the top platform ladder 701, which can facilitate the staff to climb directly from the left and right working platforms to the top working platform 7 to perform work.

[0052] The lifting device in the embodiment is as follows Figures 1 to 3 As shown, there are two groups, which are symmetrically arranged at the front and rear of the gantry support frame, and each group of lifting devices includes an electric hoist 13, a travel track 14, an electric hoist travel mechanism 15 and an electric control box 16. The travel track 14 is installed between the top of the left vertical support 10 and the right vertical support 11, and the travel track 14 is fixedly connected to the horizontal support 12 through a connecting beam 26; the electric hoist 13 is slidably connected to the travel track 14 through the electric hoist travel mechanism 15, and the electric hoist travel mechanism 15 includes a monorail trolley and a travel motor, and the monorail trolley is driven by the travel motor to travel on the travel track 14, and the electric control box 16 is connected to the control end of the travel motor through a signal line. A support beam 1401 is arranged between the travel tracks 14 of the two groups of lifting devices, and two support beams 1401 are arranged in parallel at the ends of the travel track 14, and each support beam 1401 is also connected to the horizontal support 12 through a connecting beam 26.

[0053] As one of the specific embodiments, the overall length of the work vehicle is 5785mm, the width is 4200-6500mm, the height from the rail surface is 5300-5400mm (without railings), the vehicle speed is 0-3km / h, the rated speed is 2.5km / h, the turning angle is ±15°, there are two sets of lifting devices, each set is 1 ton, the total weight of the work vehicle is 10t, and the work vehicle can be directly connected to the tunnel power supply.

[0054] The driving wheel and the driven wheel in the embodiment swing in two gears, namely, deflection and reset, and multiple gears can also be realized by adding adjustment positioning holes. In this embodiment, the contact position between the walking mechanism and the shield segment can be determined according to the width of the gantry support frame of the work vehicle, thereby determining its deflection angle, so that it can just make good contact with the segment after deflection, and then two limit adjustment holes 5061 are set on the two parallel plate surfaces of the adjustment frame 5011 according to its deflection angle, one of which is used as a reset hole, at which time the wheel body is in a vertical state with the mounting bracket; the other hole is used as a deflection hole, which is exactly the deflection angle when the wheel body is in the best contact state with the shield segment.

[0055] When the working vehicle in the embodiment is used, the horizontal support 12, the left and right vertical supports 10, 11 of the gantry support frame are first assembled, and connected to the support platform 1 of the left and right traveling supports by bolts, and then the main driving wheels 5 and the driven wheels 6 of the two traveling supports are deflected and positioned by the positioning mechanism. After the deflection, the running wheels of the two traveling supports are in an eight-shaped shape, and then the driver directly drives the working vehicle into the shield tunnel segment, as shown in FIG. Fig.15As shown, after the working vehicle travels into the tunnel, the main driving wheels 5 and the driven wheels 6 of the two traveling frames directly contact the tunnel segments 28 and travel on the tunnel segments. The locomotives and vehicles 25 operating simultaneously in the tunnel, such as the battery vehicle, travel between the two vertical frames of the gantry-type support frame. During the travel, the distance between the two sides of the locomotives and vehicles 25 and the vertical frames is 40 to 60 mm, and no collision occurs. The driver can control the direction of the working vehicle through the steering wheel 18, and can control the electric control box 16 and the hydraulic system 21 through the control screen, thereby controlling the forward, backward and turning of the traveling mechanism. During the specific operation, the construction personnel can enter the support platform 1 of the walking mechanism through the pedestrian passage 29 in the tunnel, and then enter the left and right working platforms 8 and 9 through the left and right ladders 801 and 901 on the support platform 1, and can easily perform grouting, repairing, cleaning and other work on the parts on both sides of the tunnel, and then enter the top platform through the top platform ladder 701 of the left and right working platforms 8 and 9, and can easily perform grouting, repairing, cleaning and other work on the parts on the top of the tunnel. When the tunnel construction is completed and the dismantled rails, sleepers, pipes, etc. need to be hoisted and transported after exiting the site, the lifting device on the work vehicle can be directly used for hoisting, and the hoisted materials can be placed on the support platform and directly transported out. The support plate of the walking structure in the present invention can be used as a carrying platform to carry equipment such as a double-liquid grouting pump, a cleaning machine, an air compressor, a jack, a mud and water collection device, and can also transport temporary maintenance materials, tools, etc.

[0056] The work vehicle in the present invention includes three work platforms. The lower platform can be flipped up and down 90 degrees and put away when not in use, and opened when in use. Tunnel workers can quickly and safely reach any work platform by climbing a ladder. The work platform can cover places that ordinary people cannot reach, and achieve full work surface coverage of the tunnel section. The work vehicle of the present invention can drive on its own and can reach most places in the tunnel very conveniently and quickly. During the driving process, a transport trolley can pass normally below, which will not affect the horizontal construction and transportation of the shield. The work vehicle of the present invention can be used as a construction platform, as well as a hoisting device, a carrying platform and a transportation device, and has multiple uses.

[0057] The above is only one embodiment of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. A self-propelled multifunctional working vehicle for shield tunnel construction, characterized in that: The work vehicle comprises a traveling mechanism, a gantry support frame, a construction work platform and a lifting device; The gantry support frame comprises a left vertical support (10), a right vertical support (11), and a horizontal support (12) connected to the tops of the two vertical supports; The walking mechanism comprises left and right walking frames and a brake mechanism (2) symmetrically arranged at the bottom of two vertical frames of the gantry support frame. The left and right walking frames each comprise a support platform (1), a turning mechanism, a main drive wheel (5) and a driven wheel (6). The left vertical frame (10) and the right vertical frame (11) are fixedly mounted on the support platform (1) of the corresponding side walking frame. The main drive wheel (5) is mounted on the front of the bottom of the support platform (1) through a first mounting frame (501), and the driven wheel (6) is mounted on the rear of the bottom of the support platform (1) through a second mounting frame (601). The wheel bodies of the main drive wheel (5) and the driven wheel (6) are respectively connected to the corresponding mounting frame through a deflection mechanism and can be turned when the deflection mechanism is in operation. The turning mechanism comprises a front wheel turning cylinder (3) installed at the main driving wheel (5) of each walking bracket and a rear wheel turning cylinder (4) installed at the driven wheel (6) of each walking bracket, wherein the front wheel turning cylinder (3) is fixedly installed on the support platform (1) at the rear side of the main driving wheel (5), and the piston end thereof is hingedly connected to the first mounting bracket (501); the rear wheel turning cylinder (4) is fixedly installed on the support platform (1) in front of the driven wheel (6), and the piston end thereof is hingedly connected to the second mounting bracket (601); the brake mechanism (2) is installed on the main driving wheel (5) of one of the walking brackets; The construction work platform comprises a top work platform (7), a left work platform (8) and a right work platform (9), wherein the top work platform (7) is laid flat on a horizontal support (12), and the left work platform (8) and the right work platform (9) are symmetrically mounted on a left vertical support (10) and a right vertical support (11) at a position close to the tunnel segment side and lower than the horizontal support (12); The lifting device comprises an electric hoist (13), a travel track (14), an electric hoist travel mechanism (15) and an electric control box (16); the travel track (14) is installed between the top of the left vertical support (10) and the top of the right vertical support (11), and the travel track (14) is fixedly connected to the horizontal support (12) via a connecting beam (26); the electric hoist (13) is slidably connected to the travel track (14) via the electric hoist travel mechanism (15) and can travel on the travel track (14); the electric control box (16) is arranged on a support platform (1) on one side and is connected to the electric hoist (13) via a signal line; The main drive wheel (5) comprises a first mounting bracket (501), a main drive wheel body (503), a main drive wheel deflection bracket (502), and a power system (504) mounted in the middle of the main drive wheel body (503); the main drive wheel body (503) is rotatably connected to the first mounting bracket (501) via the main drive wheel deflection bracket (502), and a drive wheel positioning mechanism (506) is provided at the connection; the power system (504) comprises a hydraulic motor and a reduction gearbox; the main drive wheel deflection bracket (502) is a hollow bracket, a rotating shaft hole is provided in the middle of the main drive wheel hub bracket (507), and the hydraulic motor is fixedly mounted on the main drive wheel hub via a first hexagon socket screw (508). The power output shaft is fixed to the middle of the main drive wheel hub bracket (507) via a first hexagon socket screw (508); the hydraulic motor is connected to the hydraulic system (21) via a hydraulic pipeline, or is connected to an external hydraulic transmission system and a hydraulic control system; the driven wheel (6) comprises a second mounting bracket (601), a driven wheel deflection bracket (603) and a driven wheel body (604); the central rotation axis of the driven wheel body (604) is fixedly connected to the central rotation axis of the driven wheel deflection bracket (603), and is rotationally connected to the second mounting bracket (601) via the driven wheel deflection bracket (603); and a driven wheel positioning mechanism (602) is provided at the connection portion thereof.

2. A self-propelled multifunctional working vehicle for shield tunnel construction according to claim 1, characterized in that: The work vehicle further comprises a hydraulic system (21), a cable reel (22) and a driving position (17) arranged on the supporting platform (1); the hydraulic system (21) is mounted on a vertical support on one side; the hydraulic system (21) comprises a hydraulic control system and a hydraulic transmission system, and is connected to two front wheel turning cylinders (3) and two rear wheel turning cylinders (4) through hydraulic pipelines and controls the same; the driving position (17) is arranged at the front or rear of one of the supporting platforms (1); a steering wheel (18), a foot brake and a control panel (19) are arranged at the driving position (17); a first protective fence (20) is arranged around the driving position (17); the cable reel (22) is mounted at the front or rear of the other supporting platform (1); the control panel (19) is communicatively connected to the control system of the electric control box (16) and the hydraulic system (21), and controls the electric control box (16) and the hydraulic system (21).

3. A self-propelled multifunctional working vehicle for shield tunnel construction according to claim 1 or 2, characterized in that: The lifting devices are provided with two groups, which are symmetrically arranged at the front and rear of the gantry support frame. A supporting crossbeam (1401) is provided between the walking tracks (14) of the two groups of lifting devices. Two supporting crossbeams (1401) are provided, which are arranged in parallel at the ends of the walking tracks (14). Each supporting crossbeam (1401) is also connected to the horizontal support (12) via a connecting beam (26). The two sets of lifting devices are controlled by an electric control box (16).

4. A self-propelled multifunctional working vehicle for shield tunnel construction according to claim 1 or 2, characterized in that: The left working platform (8) and the right working platform (9) are both provided with a support frame (23) at the bottom. The left working platform (8) and the right working platform (9) are laid flat and welded to the upper surface of the support frame (23) on the corresponding side. The support frame (23) is connected to the vertical frame on the corresponding side through a self-locking hinge, and can drive the working platform on the corresponding side to fold upward or downward by 90 degrees. The length of the top working platform (7) is greater than the width between the two vertical frames of the gantry support frame. The left working platform (8) and the right working platform (9) are arranged at 1 / 2 to 2 / 3 of the height of the vertical frame, and the side edges of the two working platforms extend out of both sides of the top working platform (7). Second guardrails (24) are respectively provided at the edges of the top working platform (7), the left working platform (8) and the right working platform (9). A left ladder (801) is provided between the left working platform (8) and the left walking frame. The left ladder (80 1) has a lower end fixed to the support platform of the left walking bracket, and an upper end fixed to the left working platform (8); a right ladder (901) is provided between the right working platform (9) and the right walking bracket, the lower end of the right ladder (901) is fixed to the support platform of the right walking bracket, and the upper end is fixed to the right working platform (9); a top platform ladder (701) is provided between the top working platform (7) and the left working platform (8) or the right working platform (9) or the two working platforms, and a crawling window (702) is provided at a position of the top working platform (7) corresponding to the top platform ladder (701).

5. A self-propelled multifunctional working vehicle for shield tunnel construction according to claim 1 or 2, characterized in that: The brake mechanism (2) comprises a brake bracket (201), a brake pad (202), a threaded connection shaft (203), a hand wheel (204), a joint bearing (205), and a brake nut (206) fixed on the brake bracket (201); the brake bracket (201) is mounted on the support platform (1); the hand wheel (204) is sleeved on the top of the threaded connection shaft (203) and fixed by a pressure plate (207) and a fastening screw (208); the threaded connection shaft (203) is threadedly connected to the brake nut (206), and the lower end of the threaded connection shaft (203) is fixedly connected to the joint bearing (205); the brake pad (202) is fixedly mounted on the lower end of the joint bearing (205), and when the hand wheel (204) is turned, the brake pad is controlled to descend through the threaded connection shaft (203) and the brake nut (206) to contact the wheel body surface of the main driving wheel (5) for braking.

6. A self-propelled multifunctional work platform for shield tunnel construction according to claim 1 or 2, characterized in that: The surface of the support platform (1) is provided with a plurality of mounting holes (101) for fixing the gantry support frame. The bottoms of the left vertical bracket (10) and the right vertical bracket (11) are fixedly mounted on the support platform (1) by bolts, and the distance between the two vertical brackets is greater than the width of the locomotive (25) traveling in the tunnel. A first cylinder mounting plate (102) is provided at a position near the main drive wheel (5) at the bottom of the support platform (1), and a first cylinder ear plate (501) is provided on one side of the first mounting bracket (501) near the front wheel turning cylinder (3). 3), the front wheel turning cylinder (3) is fixedly mounted on the first cylinder mounting plate (102), and its piston end is mounted on the first cylinder ear plate (5013) via a rotating shaft; a second cylinder mounting plate (103) is provided at the bottom of the walking bracket near the driven wheel (6), and a second cylinder ear plate (6010) is provided on the side of the second mounting bracket (601) near the rear wheel turning cylinder (4); the rear wheel turning cylinder (4) is fixedly mounted on the second cylinder mounting plate (103), and its piston end is mounted on the second cylinder ear plate (6010) via a rotating shaft.

7. A self-propelled multifunctional working vehicle for shield tunnel construction according to claim 1 or 2, characterized in that: The electric hoist travel mechanism (15) comprises a monorail trolley and a travel motor, and the travel motor drives the monorail trolley to travel on the travel track (14), and the electric control box (16) is connected to the control end of the travel motor via a signal line.

8. The self-propelled multifunctional working vehicle for shield tunnel construction according to claim 2, characterized in that: The main driving wheel body (503) and the driven wheel body (604) are both rubber wheel bodies, comprising a rubber roller and a wheel hub bracket; the main driving wheel body (503) and the driven wheel body (604) are simultaneously deflected by 0 to 60 degrees in the radial direction of the wheel bodies, and the wheel bodies of the two walking mechanisms are deflected in opposite directions and at the same angle.

9. The self-propelled multifunctional working vehicle for shield tunnel construction according to claim 2, characterized in that: The first mounting bracket (501) and the second mounting bracket (601) are both composed of a horizontal mounting plate (5010) and a vertical adjustment bracket (5011) perpendicular to the mounting plate (5010); the adjustment bracket (5011) is a grooved plate formed by welding three vertical steel plates; two of the vertical steel plates parallel to each other are provided with corresponding rotation shaft holes (5012); the main driving wheel deflection bracket (502) and the driven wheel deflection bracket (603) are provided with corresponding rotation shaft holes; the main driving wheel deflection bracket (502) and the driven wheel deflection bracket (603) are respectively embedded between the two parallel plates of the corresponding adjustment bracket (5011), and The driving wheel positioning mechanism (506) and the driven wheel positioning mechanism (602) both comprise a locking latch, at least two limit adjustment holes (5061) arranged on two parallel plate surfaces of the adjustment frame (5011), and a positioning hole (5062) arranged on a corresponding deflection bracket, wherein during the rotation of the deflection bracket, the positioning holes (5062) correspond to different limit adjustment holes (5061) and are fixedly locked by the locking latch; a plurality of bolt holes fixedly connected to the support platform (1) are provided on the mounting plate (5010), and the mounting plate is fixedly mounted on the bottom of the support platform (1) by a plurality of fastening bolts.

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