403 results about "Traction unit" patented technology

The invention relates to the technical field of commercial vehicles, in particular to a saddle capable of automatically adjusting a main suspension gap for an electric tractor. Through cooperation of the front-back displacement mechanism, the sliding rail, the sliding plate, the toothed plate, the VCU vehicle control unit, the CAN / Lin communication network unit and the main suspension distance sensor, the effect of automatically adjusting the main suspension gap is achieved, the main suspension distance sensor monitors gap data between main suspension bodies in real time, the gap data are transmitted to the VCU vehicle control unit through the CAN / Lin communication network unit, and the gap data are transmitted to the VCU vehicle control unit through the CAN / Lin communication network unit. The VCU vehicle control unit controls the double-shaft motor to start according to preset parameters and actual working conditions, the double-shaft motor drives the first gear to rotate, the first gear is meshed with the toothed plate to drive the sliding plate to move front and back along the sliding rail, then the saddle body is driven to move synchronously, automatic and accurate adjustment of the main suspension gap is achieved, and the requirement for matching of different transportation working conditions and main suspension is met; driving bumping vibration is reduced, the wind resistance coefficient is reduced, and the vehicle economical efficiency is improved.

This utility model discloses an anti-loosening fastening device for tractor units, belonging to the field of tractor unit technology. The anti-loosening fastening device includes a front connecting plate and a rear connecting plate. A movable combined arm is installed at the rear end of an adjusting frame, and a viscous damper is installed between the two movable combined arms. Hydraulic dampers are installed between the front and rear connecting plates and the adjusting frame. This utility model solves the problem that existing tractor unit fastening devices become loose due to vehicle vibrations, failing to maintain a stable working state. By connecting the hydraulic damper and the viscous damper, this utility model achieves a good connection between the front and rear connecting plates. During tractor turning, the front and rear connecting plates are subjected to tension and traction forces, causing movement. During this movement, the hydraulic damper and the viscous damper limit movement and reduce vibration, effectively achieving an anti-loosening effect.

The present application relates to asphalt pavement repair equipment technical field, especially in kind of asphalt pavement repair paste efficient paving device and use method, trailer frame is fixedly connected trailer hook through a plurality of tractor, in the trailer frame from front to back is sequentially provided with milling device, first compaction device, fixed tow device, bearing plate and second compaction device;Milling device is used to process diseased pavement, first compaction device is used to preliminary compaction asphalt pavement repair paste, fixed tow device is used to tow one side of asphalt pavement repair paste, and this side is fixed on one side of diseased pavement, the bearing plate is placed on the cutting asphalt pavement repair paste, and heating device is arranged on the bearing plate, heating device simultaneously heats asphalt pavement repair paste and diseased pavement, and second compaction device is used to final compaction asphalt pavement repair paste.The device of the present application can be used for automatic mechanization to carry out asphalt pavement repair paste paving, and more manpower is no longer needed to work, which greatly improves work efficiency.

The invention discloses a harmonic suppression method and system of a rail transit electric traction system. The system comprises a traction unit harmonic response acquisition module, a traction group construction and intra-group influence analysis module, a traction group collaborative behavior analysis module, a collaborative suppression strategy generation module and a suppression resource regulation and control module. The method comprises the following steps: dividing a plurality of traction units on the same train into traction groups, analyzing harmonic response information of the traction units on a traction group level to generate comprehensive harmonic influence characteristics, analyzing action results of the plurality of traction groups on a traction power supply section level, and judging whether a harmonic collaborative amplification or collaborative instability trend exists or not; and thus, a collaborative harmonic suppression strategy for the traction group or the traction unit is generated. Through differential regulation and control on harmonic suppression resources and in combination with feedback correction, dynamic adjustment of a harmonic suppression process is realized, and pertinence of harmonic suppression under a complex operation condition and operation stability of a traction power supply system are improved.

The utility model provides a roll-cutting machine. The roll-cutting machine comprises a supporting base, an unwinding unit, a whole material traction unit, a roll-cutting unit, a longitudinal material traction unit, a transverse cutting unit and a material collecting box, wherein the unwinding unit, the whole material traction unit, the roll-cutting unit, the longitudinal material traction unit and the transverse cutting unit are sequentially arranged on the supporting base from right to left, and the material collecting box is arranged under the transverse cutting unit. The hobbing unit comprises a first rack, a second rack, a hobbing shaft, a driving device, a driven bottom roller and a transmission device, wherein the first rack and the second rack are fixed to the supporting base, the hobbing shaft is detachably and rotationally installed on the first rack, the driving device drives the hobbing shaft to rotate, the driven bottom roller is rotationally installed on the second rack, and the transmission device is connected with the driving device and used for driving the driven bottom roller to rotate. A plurality of hobbing cutters are distributed on the hobbing shaft at equal intervals in the axial direction; the driven bottom roller is located under the hobbing shaft, the driven bottom roller and the hobbing shaft rotate reversely, and circumferential cutting grooves with the number not smaller than that of the hobbing cutters are distributed in the driven bottom roller at equal intervals in the axial direction. The slitting mill is low in manual participation degree, high in cutting efficiency and capable of cutting base materials with different widths and sizes.

The invention provides a factory-like rapid construction method for an underground long rigid pipeline, a plurality of underground factory units are planned and excavated along a pipeline line at intervals, each underground factory unit comprises an assembling unit and a traction unit, and the adjacent underground factory units are connected through a foundation pit; a travelling crane is arranged in the assembly unit, a traction system is arranged in the traction unit, an assembly jig frame is arranged in the foundation pit, and an underground factory greenhouse is installed above each underground factory unit and the foundation pit; the pipeline transport vehicle transports the pipeline sections into the assembling units, the travelling crane hoists the pipeline sections to the assembling jig frame, and all the pipeline sections are welded to form a pipeline with the designed length; the welded pipeline is driven by a traction system and assisted by a lifting type sliding support to move to a traction unit along the foundation pit; and then welding with a subsequent pipe section to form a continuous pipeline. The problems that underground long rigid pipelines are low in construction efficiency, installation precision and construction quality are solved.

A vehicle platform for parking equipment, suitable for lifting and traversing applications, includes a lifting platform composed of a platform body and a traction assembly, and a traversing platform composed of a platform body and a traversing drive assembly. The platform body consists of a front cross plate, a rear cross plate, a first longitudinal plate, a second longitudinal plate, a first side beam, and a second side beam, all fastened together to form a hollow rectangular frame. A U-shaped component formed by a front stop bar, a first stop bar, and a second stop bar is installed on the upper plane of the frame, and a rear stop bar is installed at the rear end for stopping vehicles. The traction assembly consists of four sets, respectively located at the front and rear ends of the platform body near the outer side, including a load traction unit and a backup traction unit. The traversing drive assembly includes a traversing drive mechanism installed on the platform body and four sets of rollers whose lower contour rolls in contact with the ground guide rail. The advantages of this utility model are at least: significantly improving the convenience of entering and exiting vehicles; preventing wheel overruns; and ensuring that when the load traction chain breaks or loosens, the backup traction chain takes over to prevent overturning accidents.

1. The name of the design product: two-way swing traction seat (60T). 2. The use of the design product: for oil field drilling rig derrick moving, traction car and derrick equipment traction connection. 3. The design points of the design product: in the overall shape design. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention discloses a material detection device and method for a cleaning web curtain special for hot air, and belongs to the technical field of detection devices.The material detection device comprises a movable air duct module and a web curtain tension module, and the web curtain tension module is used for adjusting the tension direction and magnitude of the web curtain in the high-temperature state; the movable air duct module comprises a high-temperature air box assembly and an assembly box component, the assembly box component is slidably mounted in the high-temperature air box assembly and used for driving a web curtain to move, the web curtain tension module comprises a traction column assembly, and a plurality of traction units matched with web curtain holes are arranged in the traction column assembly. By arranging the movable air duct module and the web curtain tension module, testing can be carried out in different tension states in the detection process, the stress position and the tension of the web curtain assembly can be variably adjusted according to detection requirements, and the detection accuracy is improved. Therefore, creep deformation, aging and air permeability change of the web curtain assembly in a high-temperature state can be measured.

The utility model belongs to the field of ship equipment, and particularly discloses marine electric tarpaulin covering equipment which comprises two fixed rails which are parallel to each other and are arranged in a bilateral symmetry mode, at least one traction unit is arranged on each fixed rail, and each traction unit comprises a supporting frame body, a driving mechanism and a guiding mechanism; the driving mechanism comprises a roller and a driving part, the roller is rotationally connected to the supporting frame body, a rotating shaft of the roller is horizontally arranged, and the driving part is installed on the supporting frame body to drive the roller to rotate; and the guide mechanism is connected to the support frame main body for guiding. According to the electric tarpaulin covering equipment, the two traction units are arranged to move on the fixed rails, the traction units can drive the tarpaulin cover to move, manual operation is not needed, unfolding and closing of the tarpaulin cover can be efficiently achieved, then opening and closing of an opening in the top of a cabin are achieved, and the labor intensity of workers is reduced.

The utility model discloses a movable heat exchange unit, which belongs to the technical field of movable heat exchange units and comprises a movable base, a mounting groove is arranged in the movable base, and a hydraulic tank is arranged at the inner bottom of the mounting groove. Firstly, a tractor is connected with a traction block, a hydraulic system is controlled, a plurality of linkage pipes are connected with a plurality of first connecting lug rings, so that a hydraulic telescopic rod starts to stretch out and draw back, an outer cylinder retracts and is nested on the surface of an inner cylinder, a supporting block is driven to ascend, and when stretching out and drawing back to a certain height, a plurality of wheel bodies touch the ground at the same time and support a movable base; then a tractor is started to pull the movable base to move to a designated position, after the movable base moves to the designated position, a hydraulic system is controlled to enable the outer barrels to stretch downwards at the same time, the supporting blocks are driven to move downwards, and after the supporting blocks move downwards to a certain degree, the movable base is supported to suspend the wheel bodies, and normal work can be conducted.

An autonomous work vehicle includes a user interface that is accessible by an operator to manually control the vehicle. A controller of the vehicle is operable to access a planned path and cause a traction unit of the vehicle to move along the planned path during autonomous work. The controller detects an unplanned event during the autonomous work that prevents the autonomous work vehicle from autonomously traversing a section of the planned path. In response to the operator taking manual control over the traction unit to traverse the section of the planned path, the controller provides a directional indicator via the user interface during the manual control that indicates a direction of the planned path relative to a current position of the work vehicle.

This invention discloses a suspension-traction track-type unmanned agricultural machinery chassis device and its operation method. The device includes: at least one carrier vehicle, two tractor vehicles, a longitudinal track, and a transverse track. The carrier vehicle includes a chassis frame, V-shaped sliding wheels, and an electric lifting platform. The V-shaped sliding wheels are installed at the bottom of the chassis frame and roll along the longitudinal track arranged along the length of the farmland. The electric lifting platform is installed above the chassis frame and is used to connect agricultural implements. The two tractor vehicles are respectively arranged at both ends of the farmland. Each tractor vehicle includes a steel frame, track wheels, and at least one electric winding machine. The track wheels are installed at the bottom of the steel frame and roll along the transverse track arranged along the width of the farmland. At least one electric winding machine is installed on the steel frame, and a suspension cable is wound on the electric winding machine. The suspension cable is connected to both ends of the carrier vehicle to traction the carrier vehicle to move along the longitudinal track.

The invention provides a large hazardous chemical substance transport vehicle and a working method thereof, and relates to the field of large hazardous chemical substance transport vehicles, and adopts the scheme that a tractor is sequentially provided with a first axle, a second axle, a third axle and a fourth axle from front to back, and the third axle and the fourth axle are connected with a frame of the tractor through an air suspension system; the hydraulic driving system is arranged on the tractor, the hydraulic driving system comprises two driving motors, and the driving motors can drive the second axle to rotate; the sensor group is used for collecting a trailer attitude signal and ramp information and transmitting the signals to the central controller; the central controller is configured to judge the vehicle driving working condition based on signals collected by the sensor set and synchronously generate a torque control instruction used for the hydraulic driving system and a height adjusting instruction used for the air suspension system so as to cooperatively adjust the vehicle posture. According to the invention, more comprehensive and timely horizontal control of the cargo platform or the tank body can be realized.

A power supply system (100) for a trailer (10) is disclosed. The power supply system (100) comprises: a first controller (110) and a second controller (120) for controlling one or more loads (400) of the trailer (10); a first power supply terminal (201) for supplying power from the traction vehicle (20) to the first controller (110) via a first power supply channel (210); a second power supply terminal (202) for supplying power from the traction vehicle (20) to the second controller (120) via a second power supply channel (220); and an internal communication link (300) connecting the first controller (110) and the second controller (120) such that they exchange information with each other, in which the first power supply channel (210) and the second power supply channel (220) are configured to be able to provide independent power supply from the traction vehicle (20) to the first controller (110) and the second controller (120).

The invention discloses a milling machine steering system which comprises steering traction units arranged on the left front side, the right front side, the left rear side and the right rear side of a frame respectively, the steering traction units are correspondingly connected with walking track units respectively, a front connecting piece is arranged between the two steering traction units on the front side, and a rear connecting piece is arranged between the two steering traction units on the rear side. The at least one steering traction unit on the rear side is connected with a rear connecting piece, the at least one walking track unit on the rear side is connected with a limiting device, and a driving device is arranged between the steering traction units and the walking track units. The rear connecting pieces are in linkage with the corresponding steering traction units to be switched between the first position and the second position, when the steering traction units are located at the first position, the right front walking crawler belt and the left front walking crawler belt rotate, and when the steering traction units are located at the second position, the four walking crawler belts corresponding to the steering traction units all rotate. The system reduces the abrasion of the track shoe, prolongs the service life, reduces the turning radius, improves the flexibility of the whole vehicle in a narrow channel, and improves the maneuverability of equipment.

The present application relates to the technical field of channel plate laying, in particular to a unit plate channel laying device for mudflat. The unit plate channel laying device for mudflat comprises a tractor, a laying rack, unit plates, connecting pieces and fixing pieces, the tractor is tractionally connected with the laying rack, two adjacent unit plates are hingedly connected through a connecting plate to form a unit plate chain group, the unit plate chain group is placed on the laying rack, and one end of the unit plate chain group is connected to the fixing pieces fixed on the ground. The unit plate channel laying device for mudflat can solve the problem of low efficiency caused by slow laying speed of channel plates in mudflat areas.

Systems and methods are disclosed for controlling operations of autonomous vehicles and systems in, for example, logistics yards at distribution, manufacturing, processing and / or other centers for the transfer of goods, materials, and / or other cargo. In some embodiments, an autonomous yard tractor or other vehicle can include one or more systems for locating an over-the-road trailer parked in a yard of a distribution center, engaging the trailer, and moving the trailer to a loading dock for loading / unloading operations in accordance with a workflow procedure provided by a central control system. In other embodiments, an autonomous yard tractor can locate the trailer at the loading dock after the loading / unloading operations, engage the trailer, and move the trailer to a parking location in the yard. In some embodiments, the autonomous yard tractor can include a sensor system configured to detect the position of the trailer relative to, for example, the tractor, and / or the dock station can include a sensor system configured to detect the position of the trailer relative to, for example, the dock station during a docking procedure.

Systems and methods for autonomous vehicle control are provided. A remote computing system includes a communication interface coupled to a network, a map database storing centralized map data, a processor, and a memory storing instructions that, when executed by the processor, cause the processor to perform operations. The operations include: receiving a transport request including a first location and a second location; selecting a first vehicle of a plurality of vehicles for the transport request based on at least one of the transport request and a vehicle status; transmitting the centralized map data to the first vehicle; causing the first vehicle to complete the transport request, including causing the first vehicle to autonomously transport from the first location to the second location and causing the first vehicle to collect first sensor data; receiving the first sensor data in real-time; and, updating the centralized map data with the first sensor data.

The utility model discloses an open -air planting solanaceous fruit artificial pollination auxiliary system, including the fixing frame, the fixing frame sliding connection several adjusting frame, adjusting frame sliding connection protection unit, is equipped with the flower after pollination in protection unit, and the opening of protection unit is inclined downward, the opening of protection unit connects the cover subassembly, and the cover subassembly is used for opening or closing the opening of protection unit, the cover subassembly connects the traction unit, and the traction unit rotatory connection pivot, one end of pivot passes through bearing rotatory connection base, and base connection fixing frame, and the other end of pivot passes through bearing rotatory connection adjusting seat, and adjusting seat connection fixing frame, when adjusting seat is in the working position, adjusting seat fastening connection pivot, the utility model discloses above -mentioned structure, when suddenly meeting strong wind or heavy rain, can make multiple flowers after pollination in the sealed space that protection unit and cover subassembly constitute quickly, has saved time, has improved hybridization success rate, is suitable for solanaceous fruit pollination.

The present application belongs to the general vehicle technical field, and particularly relates to a towing connector, especially a saddle for a towing vehicle and a mounting method thereof; wherein the saddle for the towing vehicle comprises: two limiting baffle plates, which are slidingly arranged at the bottom of a grinding disc body, and one limiting baffle plate corresponds to one towing pin; a control unit, which is in communication connection with a displacement sensor at the end of a trailer; the control unit is configured to collect the moving stroke data of the two limiting baffle plates in real time, calculate the stroke difference value, and compare with a preset threshold value; wherein the grinding disc body moves to the direction of the trailer until the locking hooks abut against the towing pins of the trailer; the towing pins push the two locking hooks to outwardly turn around the hinge points, so as to make the towing pins abut against the bottom wall of the guide groove; the locking hooks push the limiting baffle plates to outwardly move when outwardly turning, and the displacement sensor monitors the outward moving stroke of the limiting baffle plates; if the stroke difference value of the outward moving of the two limiting baffle plates is not greater than the threshold value, the control unit outputs an alignment success signal.

The utility model relates to the technical field of heat shrink tube processing equipment, in particular to multi-station multi-specification heat shrink tube penetrating and sleeving equipment. Comprising a first feeding mechanism which comprises a vibration disc configured to contain a to-be-sleeved heat shrink tube and a material conveying channel connected with the vibration disc; the second feeding mechanism comprises a heat shrink tube coiling frame and a traction unit, the heat shrink tube coiling frame is configured to enable the heat shrink tube to be wound on the heat shrink tube coiling frame, and the traction unit is configured to convey the heat shrink tube from the heat shrink tube coiling frame to a tube cutting station; the pipe cutting mechanism is configured to cut the heat shrink pipe conveyed by the second feeding mechanism at a pipe cutting station; the heat shrink tube transferring mechanism is configured to transfer the heat shrink tube on the material conveying channel or the heat shrink tube subjected to the cutting procedure to a sleeving station; and the sleeving mechanism is configured to sleeve the surface of the cable with the heat shrink tube at the sleeving station. By adopting the equipment provided by the utility model, the problem of insufficient flexibility caused by a single feeding mechanism can be avoided.

The present invention includes a locking bar (120) of the fifth wheel coupling unit (100). The locking bar (120) includes a main body (130) pivotally mounted to a handlebar member (104). The main body (130) is adapted to secure a lock jaw (118) of the fifth wheel coupling unit (100) in an engaged position. The main body (130) includes a right- side edge (128) and a front edge (122). The right-side edge (128) having a first curved profile (136). The front edge (122) having a first portion (122a). The first portion (122a) having a second curved profile (138) in the top view of the locking bar (120). The first curved profile (136) and the second curved profile (138) are adapted to facilitate smooth engagement and disengagement with the lock jaw (118).

The invention relates to the technical field of pipe fitting cutting, and provides a cutting device for semi-trailer tractor chassis accessory machining, which comprises a transport box, two groups of fixed seats and first clamping wheels are fixedly mounted at the bottom of the inner wall of the transport box, a top plate is arranged on the upper side of the inner cavity of the transport box, and two groups of movable seats and second clamping wheels are fixedly mounted at the bottom of the top plate. A workpiece is clamped and placed between the second clamping wheel and the first clamping wheel, and a transmission mechanism is installed between the front face of the second clamping wheel and the front face of the first clamping wheel. According to the device, the functions of transporting and fixing workpieces of different sizes are achieved, meanwhile, constant clamping force and friction force generated on the workpieces of different sizes are achieved, an adaptive frame rotationally connected with a first connecting plate and a second connecting plate is utilized, a fourth gear, a third gear, a fifth gear and a second gear are synchronously meshed, and the clamping force and the friction force of the workpieces of different sizes are adjusted. And the transmission function of the transmission mechanism is not affected even if the height of the second clamping wheel is changed, so that the device can adapt to workpieces of different sizes, and the applicability is high.

This invention discloses a method, device, equipment, medium, and product for integrated control of the main and trailer trailers in heavy-duty trucks. It acquires vehicle operating status parameters collected by the VCU and TECU via standard sensors, and performs real-time estimation of the main and trailer articulation force and angle for preset low-cost application scenarios without physical force or angle sensors. It identifies the vehicle's current operating condition in real time, matches the corresponding preset operating mode, and determines weight coefficients for energy consumption, power, and safety. Based on these weight coefficients, it constructs a multi-objective optimization objective function including motor temperature correction and aging correction to obtain optimal torque distribution commands for the tractor's middle axle, tractor's rear axle, and trailer drive axle. The optimal torque distribution command from the tractor side is sent to the main vehicle drive system for execution, and the optimal torque distribution command from the trailer side is sent to the TECU drive system for synchronous execution via a dual-redundant CAN-FD bus, completing the coordinated power output of the main and trailer trailers. This invention enables integrated coordinated control of the main and trailer trailers in new energy train systems.

The invention provides an auxiliary tripper car of an endless rope continuous tractor and a rope locking device of the auxiliary tripper car, the rope locking device comprises a rope locking assembly, the rope locking assembly comprises a rope locking support, a rope locking oil cylinder fixedly mounted at the top of the rope locking support, a rope clamping plate connected with a rod body extending downwards from the rope locking oil cylinder, and a rope clamping seat fixed at the bottom of the rope locking support and used for being matched with the rope clamping plate; the fixing box is fixedly arranged on a frame of the auxiliary tripper car, a space for containing the rope locking support is formed in the fixing box, the top of the fixing box is open, and the rope clamping seat extends out of an opening in the bottom of the fixing box; the rope locking assembly is controlled by the adjusting mechanism to ascend and descend in the fixed box. The rope locking device is used in the auxiliary tripper car of the endless rope continuous tractor. The rope locking assembly is arranged in the fixing box, and when the auxiliary tripper car passes through the turnout, the rope locking assembly is adjusted to rise by a certain distance in the fixing box, so that the auxiliary tripper car can normally run on the track, and an avoiding groove does not need to be formed in the track.

The application relates to an automatic telescopic side protection device suitable for a truck train and the truck train, and belongs to the technical field of vehicles. The automatic telescopic side protection device suitable for the truck train comprises a side protection main body which is arranged between a tractor and a trailer. The side protection main body is configured to change its length following the angle of the tractor relative to the trailer. The application embodiment provides an automatic telescopic side protection device suitable for a truck train and the truck train. The side protection main body is arranged, the side protection main body changes its length following the angle of the tractor relative to the trailer, and then the side protection length can be automatically adjusted when the tractor turns, interference with the trailer is avoided, the vehicle body structure is effectively protected from damage, meanwhile, a pedestrian or a vehicle is prevented from entering the vehicle bottom through the gap between the tractor and the trailer, a rolling accident is avoided, and the vehicle and the pedestrian are protected and buffered.

The present application relates to the technical field of rotating drum sail, and particularly relates to a magnetic suspension rotating drum sail, which comprises an inner supporting rod, an outer rotating drum, a traction unit, an axial supporting unit and a radial supporting unit; the axis of the inner supporting rod is vertical; the outer rotating drum is arranged outside the inner supporting rod and can rotate around the axis of the inner supporting rod; the traction unit is installed on the inner supporting rod and the outer rotating drum and can generate radial magnetic traction force on the outer rotating drum; the axial supporting unit is installed on the inner supporting rod and the outer rotating drum and can generate axial magnetic supporting force on the outer rotating drum; and the radial supporting unit is installed on the inner supporting rod and the outer rotating drum and can generate radial magnetic supporting force on the outer rotating drum.

This invention discloses a tunnel segment removal device, comprising a removal unit, a soil-carrying unit, and a traction unit. The removal unit includes a mounting base movably disposed within the tunnel along a front-to-back direction, with a mounting bracket on the mounting base. Multiple robotic arms are mounted on the mounting bracket and are detachably connected to the tunnel segments within the tunnel. The soil-carrying unit is located at the front of the mounting bracket and includes two soil-carrying components arranged in a left-to-right direction. Each soil-carrying component has an upward-facing mounting groove, and the opposite sidewalls of the two mounting grooves are interconnected. The orientation of the two soil-carrying components in the left-to-right direction is adjustable. The traction unit drives the mounting base, enabling it to move along a front-to-back direction. This invention removes tunnel segments within the tunnel using multiple robotic arms, carries loose soil from the removed segments using the mounting grooves, and uses the traction unit to move the removal unit and transport the segments out of the tunnel. This method offers high removal efficiency and low safety risks.

The utility model discloses a heavy-duty tractor double-rear-axle middle fender support which comprises a supporting pipe beam and further comprises a first installation base fixedly installed at one end of the supporting pipe beam, and reinforcing ribs are welded to the periphery of the connecting position of the first installation base and the supporting pipe beam. A first mounting seat is fixedly mounted on the outer side of the supporting tubular beam, a second mounting seat is fixedly mounted on the side, close to the first mounting seat, of the outer side of the supporting tubular beam, mounting holes are symmetrically formed in one side of the first mounting seat and the top of the second mounting seat in a penetrating mode, and connecting frames are symmetrically mounted on the side, away from the first mounting seat, of the outer side of the supporting tubular beam. Connecting holes are symmetrically formed in the two sides of the two connecting frames in a penetrating mode, a supporting assembly is arranged at the position, located between the two connecting frames, of the outer portion of the supporting pipe beam, and the supporting assembly comprises a supporting frame arranged outside the supporting pipe beam; the reliability of the fender support assembly is improved, the supporting pipe beam can be effectively prevented from being broken from the connecting position of the base, and the production cost and the production difficulty can be effectively controlled.