1331 results about "Semi-trailer" patented technology

The invention discloses a semitrailer automatic emergency braking control system and method based on vehicle-road cooperation. The system comprises an information acquisition module and a multi-stage AEB early warning module. The invention provides a semi-trailer braking control system, a multi-stage AEB braking module, an inverse braking module and a PID control module, and provides a braking control method using the control system, and accurate multi-stage early warning and multi-stage braking control are output for a semi-trailer under different road situations based on the vehicle-road cooperation technology. The brake deceleration output by the control strategy is converted into brake master cylinder pressure by constructing an inverse brake module; and based on a PID control module, the error between the ideal expected braking deceleration planned by the control strategy and the actual braking deceleration of the semi-trailer actually running under each working condition is reduced. The semitrailer can accurately judge and output accurate control braking deceleration according to different road scenes such as various road attachment conditions, and the requirement for automatic emergency braking control of the semitrailer under the complex road working conditions such as a low attachment road surface, a curve and a ramp is met.

The invention discloses a motor-driven tractor-semitrailer driving stability control method which comprises the following steps: firstly, establishing a tractor-semitrailer three-degree-of-freedom dynamic model, and solving yaw velocity expected values and side slip angle expected values of a tractor and a semitrailer according to driver input and actual vehicle states; secondly, according to the deviation between the expected value and the actual value of the vehicle state quantity, an upper-layer controller outputs the expected additional yaw moment, and the adaptive capacity to the parameter change of the semitrailer is achieved; the lower layer controller then outputs a torque on each wheel according to the desired additional yaw moment and the vehicle state, including a driving torque on the driving wheel and a braking torque on all wheels. By the adoption of the method for controlling the running stability of the motor-driven tractor-semitrailer, unstable working conditions such as rollover and folding of the tractor-semitrailer in the running process can be avoided, the running stability is improved, and meanwhile the method has the self-adaptive capacity for load changes of the semitrailer.

The invention provides a tractor semitrailer full-working-condition active stability control system and method, and belongs to the technical field of vehicle engineering. The system comprises a kinetic model module, a reference quantity determination module and an active stability controller module. The dynamic model module constructs a linear three-degree-of-freedom tractor semitrailer model, a hub motor model and a longitudinal driver model. The reference quantity determination module generates an ideal state value according to the steady state condition of the system and corrects the ideal state value in combination with the road attachment condition. The active stability controller module is divided into three layers, an MIMO-IMFAC controller calculates additional yawing moment, a torque optimization controller optimizes tire load distribution through a quadratic programming algorithm, and a driving / braking torque distribution controller preferentially uses regenerative braking and dynamically adjusts braking torque of the semitrailer according to the yawing moment. By adopting the control system and the control method, the stability and the dynamic response capability of the vehicle under complex working conditions are remarkably improved.

The invention belongs to the technical field of vehicle steering control, and relates to a van semitrailer steering synchronization angle closed-loop test calibration system, which comprises the following steps of: firstly, executing a static steering test on a no-load combined vehicle, and constructing a mapping reference table of a saddle space position and an ideal hinge angle; then multi-working-condition dynamic steering testing is carried out on the load combination vehicle, vehicle frame deformation data are collected in real time, the deformation data are converted into a hinge angle compensation value through a pre-trained deformation mechanical model, selective correction is carried out on the actually-measured hinge angle based on a deformation compensation starting threshold value, a calibration target is generated to reversely analyze the target saddle position, and the target saddle position is corrected; the problem that in the prior art, inevitable elastic structure deformation and real mechanical steering asynchronous faults of the van semitrailer under the actual dynamic load working condition cannot be fully considered and distinguished is effectively solved, and then multi-working-condition driving verification data are collected, deformation mechanical model parameters are iteratively updated, and a compensation threshold value generation strategy is generated. And closed-loop optimization is realized.

The invention relates to an electric drive semitrailer grading AEB control decision-making method considering road surface factors, and the method comprises the following steps: S1, enabling a vehicle to obtain front vehicle information and road surface information through a sensor, a high-precision map and other ways, calculating a correction adhesion coefficient through combining with the state of the vehicle, and determining the maximum gradient limit; s2, outputting a maximum braking deceleration correction factor through fuzzy control by taking the correction adhesion coefficient and the gradient as input; s3, according to the advantages and disadvantages of the road surface working conditions and the maximum braking deceleration correction factor, the maximum braking deceleration is calculated according to the working conditions; s4, calculating a safe braking distance and collision time according to the current state of the vehicle and the speed and distance of the front vehicle; and S5, the collision time is used for early warning decision making, the safety braking distance is used for emergency braking decision making, the corrected maximum braking deceleration serves as a full-force braking target value, and graded AEB control is achieved. According to the method, road surface factors are fully considered, vehicle safety can be guaranteed under different attachment conditions and slope road surfaces, and the braking stability is remarkably improved.

Provided are equipment and methods for intelligent mobile medical waste disposal and flue gas purification, and the equipment includes a vehicle-mounted mobile platform and a skid-mounted standard container; where, the vehicle-mounted mobile platform is composed of a standard semi-trailer truck and a truck carriage base; the vehicle-mounted mobile platform is used for realizing functions of mobile transportation, cargo loading, fuel loading and unloading, power charging and discharging and network information transmission; the skid-mounted standard container is loaded above the truck carriage base of the vehicle-mounted mobile platform; and the skid-mounted standard container consists of a standard container and contents in the standard container; and the contents include: an intelligent collection and transportation feeding system, a medical waste pyrolysis incineration system, an incineration flue gas purification system, and an intelligent management and control system for medical waste disposal.

The invention relates to the technical field of vibration damping devices, in particular to a rocket body transport vehicle vibration damping device which comprises a base, a first vibration damper and a second vibration damper. The base is fixed to the upper side of the suspension, one end of the first shock absorber is fixedly connected with the middle of the base, and the other end of the first shock absorber is fixedly connected with a frame. Mounting grooves are formed in the side face, close to the frame, of the base and located on the two sides of the first shock absorber, the second shock absorbers are arranged in the mounting grooves, and the shock absorption ends of the second shock absorbers are connected with the shock absorption end of the first shock absorber. In the working process, the overall vibration reduction effect of the semitrailer can be improved.

The invention relates to the technical field of semitrailers, and discloses a side-turning self-dumping semitrailer which comprises a semitrailer body, a carriage, a driving mechanism and a movable side carriage door, and a side baffle structure and a door locking structure corresponding to the movable side carriage door are arranged on a lower side beam of the carriage. The side baffle structure comprises a baffle, a balance weight beam arranged on the top of the outer side face of the baffle and a plurality of supporting pipes vertically arranged on the baffle, and the bottoms of the supporting pipes are connected with a lower side beam pivot of the carriage. The side baffle structure and the door locking structure of the rollover self-dumping semitrailer can be opened and closed by ingeniously utilizing the rollover acting force of the carriage, the reliability is high, additional power sources (such as an oil cylinder and an air cylinder) do not need to be arranged, the manufacturing cost and the maintenance cost are reduced, and meanwhile the oil leakage risk is avoided. Due to the linkage design of the movable side compartment door and the baffle, the unloading process is smoother, manual intervention is not needed, and the problem that tires are prone to being buried by goods during unloading of an existing side-tipping dumper is fundamentally solved.

The utility model relates to a semitrailer with a locking device, and belongs to the technical field of semitrailers, the semitrailer comprises a semitrailer body, a tail anti-collision beam frame and an elastic buffer assembly, the tail anti-collision beam frame is slidably mounted on the semitrailer body, and the tail anti-collision beam frame is slidably mounted on the semitrailer body. The elastic buffering assembly is connected with the tail anti-collision beam frame to drive the tail anti-collision beam frame to have the trend of moving towards the tail of the semitrailer body all the time. The tail anti-collision beam frame of the semitrailer has the advantage that the buffering effect of the tail anti-collision beam frame of the semitrailer can be improved when the semitrailer is

The invention discloses a semitrailer frame and a loading and unloading method thereof, and relates to the technical field of semitrailers, the semitrailer frame comprises a longitudinal beam frame, a plurality of cross beams are fixedly welded in the longitudinal beam frame and on the front side and the rear side of the longitudinal beam frame, a traction pin mechanism is arranged at the bottom of the longitudinal beam frame, and a plurality of first connecting holes are formed in the tops of the longitudinal beam frame and the cross beams; the panel mechanism comprises a connecting panel and a bearing panel, a plurality of first mounting grooves are formed in the connecting panel, first bolts are arranged in the first mounting grooves in a penetrating and threaded mode, the first bolts are in threaded connection with the first connecting holes, and the bottom of the connecting panel is attached to the top of the longitudinal beam frame and the top of the cross beam. Inertial impact force generated by the full-load carriage during emergency braking can be effectively buffered, so that a connecting and fixing mechanism between the carriage and the bearing panel and a frame are effectively prevented from being damaged by large inertial impact force, goods can be effectively prevented from being damaged by the large inertial impact force, and the transportation loss of the goods is reduced.

The invention relates to the technical field of battery management of hybrid power vehicles, in particular to a hybrid power semitrailer battery management system and a multi-mode balance control method, and the hybrid power semitrailer battery management system comprises a data acquisition module, a main control module, a balance execution module, a thermal management module, a communication interface module and a safety protection module. Accurate battery state estimation and dynamic parameter updating are realized through an advanced algorithm and a model, a decision basis is provided for equalization and thermal management, an active and passive hybrid architecture and an intelligent topology switching strategy are adopted, energy management between battery cells is efficiently realized, energy waste is avoided, wind speed and wind direction are dynamically regulated and controlled by applying reinforcement learning, and energy consumption is reduced. The temperature consistency of the battery cell is maintained with low energy consumption, the energy utilization efficiency, the state control precision and the operation safety of the battery management system are remarkably improved, the service life of the battery is effectively prolonged, and stable operation of the system is guaranteed.

The invention discloses a semitrailer battery energy transmission system and method based on an electric traction vehicle, belongs to the technical field of battery energy transmission, and aims to solve the problems that in the prior art, energy supply for a semitrailer is inconvenient, the actual transportation effect of the semitrailer is affected, and the transportation cost is increased. The system comprises an electric tractor and a semitrailer, the electric tractor is provided with an optical coupler, the electric tractor is provided with a traction seat and a first battery, the optical coupler is electrically connected with a control device, an ECU control unit and a vehicle end interface, the ECU control unit is electrically connected with a display, and the control device is provided with a plurality of control assemblies; the second battery is charged through the first battery, so that energy supply for the semitrailer is facilitated, the problem of insufficient energy of the semitrailer can be effectively solved, the transportation problem caused by insufficient energy of the semitrailer in the driving process is avoided, the logistics transportation efficiency is improved, and the logistics cost is reduced.

The invention relates to the technical field of semitrailer carriage welding, and discloses a welding device for semitrailer carriage production and processing, which comprises two groups of symmetrical support racks, a welding platform is jointly arranged on the sides, close to each other, of the two groups of support racks, and a coaming and a support beam body are flatly laid and supported on the top of the welding platform; according to the welding device for production and processing of the semitrailer carriage, a supporting transverse plate is driven by a first supporting column to move downwards, so that a second rolling wheel and a first rolling wheel are driven to move downwards, the second rolling wheel is firstly attached to the top face of a surrounding plate, then the first rolling wheel is attached to the top face of a supporting beam body, and welding is completed. The two sets of second rolling wheels are driven by displacement power of the first rolling wheels to move in the approaching direction of the supporting beam body, and extrusion force towards the supporting beam body is generated on the coaming through friction between the bottoms of the second rolling wheels and the top face of the coaming, so that the position structure of the welding seam position between the coaming and the supporting beam body is kept stable.

The invention discloses a piggyback transport vehicle which comprises a vehicle body used for bearing a semitrailer compartment; the saddle is arranged at the top of the vehicle body in a sliding mode and used for being connected with a semitrailer traction pin, the saddle comprises a seat plate, and a connecting groove allowing the semitrailer traction pin to be clamped in is formed in the side, close to the semitrailer, of the seat plate. A semitrailer carriage is hoisted into a semitrailer body through a crane to be placed, a walking mechanism drives a saddle which moves to one side in advance to move towards the side close to a semitrailer traction pin till the semitrailer traction pin moves into a joint groove and is blocked by a retaining assembly, and then under the matching action of a driving cutting mechanism, a driving assembly stops driving a sliding assembly; therefore, the position of the saddle is fixed, when the piggyback transport vehicle faces semitrailer carriages with different lengths, it is only needed to set a fixed operation duration for the driving assembly, connection of the saddle and traction pins of semitrailers with different lengths can be guaranteed, and the purpose of improving the loading efficiency is achieved.

The invention provides a semi-trailer rollover early warning method and system based on dynamic threshold value prediction. The early warning method comprises the steps that the transverse acceleration, the yaw velocity, the vehicle speed, the suspension pressure and the front lane curvature of a semi-trailer are obtained in real time; according to the collected and calculated data and a linear trend extrapolation method, constructing a dynamic rollover risk threshold function and a comprehensive risk index function, and calculating a rollover risk threshold, a real-time risk value and a predicted risk value; the item with the higher value in the real-time risk value and the predicted risk value is selected and compared with a rollover risk threshold value, and whether early warning is triggered or not is judged, and a control instruction is issued; the early warning system comprises a semitrailer state monitoring unit, a lane curvature recognition unit, a rollover risk threshold calculation unit, a real-time risk value calculation unit, a predicted risk value calculation unit and an early warning control unit, and is used for realizing the early warning method, so that the response speed and the judgment accuracy of the semitrailer rollover early warning system under variable working conditions are improved.

An auxiliary power system for an electric semi-truck is disclosed. The auxiliary power system includes a power storage device mounted to a semi-trailer. One or more main batteries provide propulsion to a semi-truck and are in electrical communication with the power storage device to receive auxiliary power therefrom. The power storage device is operable to increase the range over which the semi-truck travels between recharging. The power storage device may be configured to either provide supplemental power to increase the power output of the semi-truck in real-time or may be configured to increase the range between recharging of the main batteries of the semi-truck.

The invention relates to the technical field of transport vehicles, and discloses a new energy container transport semitrailer which comprises a semitrailer body and a container body hoisted above the semitrailer body. Two main beams are installed on the semi-trailer body, a plurality of cross beams are installed between the two main beams, loading blocks are installed in the cross beams, two inserting grooves are symmetrically formed in each loading block, a plurality of sets of inclined blocks are installed at the bottom of the box body, and each set of inclined blocks correspond to the two inserting grooves in the corresponding loading block. And two clamping pushing assemblies are arranged in the cross beam. The inclined blocks are matched with the protection assemblies, the clamping blocks and the limiting assemblies, guiding, fixing and limiting are achieved when the box body is hoisted and moves downwards, the lateral restraining force and the connecting strength are enhanced, the electromagnets are used for fixing the two sides of the bottom of the box body, the weight is evenly distributed, the main beam deformation risk is reduced, the pull ropes are matched with the protection assemblies to form a protection barrier, and safety is improved; the inclined block design avoids direct contact between the box body and the ground, and the service life is prolonged.

Systems and methods for predicting anomalies in a wheel system of a semi-trailer truck. One example system includes: a vibration sensor positioned to sense vibrations of the wheel system and an electronic processor communicatively coupled to the vibration sensor. The electronic processor is configured to determine a velocity profile of the semi-trailer truck; obtain a vibration measurement; determine, from the vibration measurement, a classified vibration level; determine whether the classified vibration level is indicative of an anomaly; identify, based on whether the classified vibration level is indicative of the anomaly and both the velocity profile and a reference classified vibration level, an anomaly existing within either or both of the semi-trailer truck wheel system or the road; and perform a mitigation action in response to identifying the anomaly.

The invention relates to a semitrailer traction pin assembly (1) for an articulated vehicle, comprising a traction pin (2) defining an axis of rotation (A) wherein the traction pin (2) has a traction pin flange (3) for directly or indirectly connecting the traction pin (2) to the semitrailer. The traction pin assembly (1) further comprises an angle measuring device (15) at least partially embedded in the traction pin (2), the device having a shaft (17) rotatably mounted about the axis of rotation (A), and a transmission member (18) connected to the shaft (17), the transmission member (18) being pivotable about the axis of rotation (A).

An apparatus and system for mounting, monitoring, and managing one or more battery packs within a housing attached to or, integrated in, a commercial vehicle such as a semi-trailer for the purpose of providing battery power to all-electric powered commercial vehicles. One or more removable battery packs of various sizes may be mounted in one or more housings within an assembly installed on, or included as a structural part of, the frame of a commercial vehicle. Electrical connections on the installed battery packs connect the battery packs to each other and to the commercial vehicle electric motors. Computer systems permit the monitoring and managing of each installed battery pack. Thus, commercial vehicles may be provided with the appropriate battery power supply for an anticipated trip, without being required to purchase or to haul excess batteries and thus excess weight on the trip.

The invention relates to a commercial vehicle (3) comprising a tractor unit (4) and a semi-trailer (5), wherein the tractor unit (4) has cameras, a satellite navigation system, side mirrors (7) and / or mirror replacement cameras (7) having a first field of view (B1), wherein a radar sensor (8) is arranged at the rear of the tractor unit (4) such that it detects a second field of view (B2) under the semi-trailer (5) or trailer, which includes an area of ​​shadowing (A) by the semi-trailer (5) lying outside the first field of view (B1), wherein the tractor unit (4) further comprises a lane change assistance system configured to monitor areas next to, behind and to the side of the commercial vehicle (3) for other vehicles (6.1 to 6.4), to determine the position, speed and acceleration of detected vehicles (6.1 to 6.4) and to predict when approaching vehicles (6.1 to 6.4) will4) are located next to or near the commercial vehicle (3), when one of the vehicles (6.1 to 6.4) enters an area critical for a lane change of the commercial vehicle (3), to issue a warning in the commercial vehicle (3), to increase a warning level of the warning issued to the driver when a direction indicator (10) of the commercial vehicle (3) is switched on, in this case then, if the vehicle (6.1 to 6.4) decelerates, to withdraw the warning or reduce the warning level, and otherwise to maintain the warning.

The utility model discloses a folding ladder stand device capable of being used as a bearing surface, and relates to the technical field of semitrailer ladder stands. The carriage comprises a carriage body and a plurality of ladder stand bodies, a plurality of ladder stand lugs are fixedly arranged at the tail end of the carriage body, ladder stand rotating shafts are fixedly installed at one ends of the ladder stand bodies, sleeves are arranged on the outer walls of the ladder stand rotating shafts in a sliding mode, and a carriage rotating shaft is rotatably installed between every two adjacent ladder stand lugs. The outer walls of the multiple carriage rotating shafts are fixedly provided with linkage butt straps. According to the utility model, the ladder stand body which is horizontally aligned with the cargo carrying surface of the carriage body after being folded is arranged, so that the space of the cargo carrying surface of the carriage body is not occupied, and under the condition that the total length of a vehicle is consistent, the size of the cargo carrying surface of the vehicle using the ladder stand body is larger, and the ladder stand body can serve as a part of the cargo carrying surface to load more cargoes; and a fixing ring or a container lock and other devices can be placed on the upper plane of the crawling ladder body, so that the diversity of cargos is met.

The utility model discloses a dual-system evaporator for a vehicle, and belongs to the technical field of evaporators for refrigeration vehicles. The evaporator mainly comprises an evaporator shell, the two ends of the evaporator shell are fixedly connected with side fixing plates respectively, a plurality of sets of heat exchange coils are arranged in the evaporator shell, a plurality of pipeline supporting plates used for supporting and fixing the heat exchange coils are fixedly connected in the evaporator shell, and each set of heat exchange coils comprises a first coil and a second coil which are arranged in a staggered mode. The two ends of the first coil pipe and the two ends of the second coil pipe penetrate through the side fixing plates. The two sets of heat exchange channels which operate independently are additionally arranged in the evaporator and are arranged in the crossed mode, the crossed heat exchange channels enable the temperature distribution of the evaporator to be more uniform, and even if one set of heat exchange channels cannot work normally, the other set of heat exchange channels can still effectively maintain the refrigeration temperature. The utility model is mainly used for refrigeration of the refrigeration semitrailer.

The utility model belongs to the technical field of trailer tools, and particularly relates to a limiting device for a low flatbed semitrailer, which comprises a connecting support bottom plate, clamping fixing blocks are slidably arranged on two sides of the connecting support bottom plate, and a plurality of adjusting positioning seats are fixedly connected to the top end of the connecting support bottom plate. Vertical linkage blocks are slidably connected to the top ends of the adjusting positioning seats, locking blocks are slidably connected to the top ends of the vertical linkage blocks, horizontal alignment blocks are slidably connected to the inner sides of the vertical linkage blocks, the locking blocks are clamped to the horizontal alignment blocks, and limiting rings are fixedly connected to one sides of the horizontal alignment blocks; through the cooperation of the adjusting positioning seat, the horizontal alignment block and other parts, when the low-flatbed semitrailer transports a vehicle, the limiting and fixing work of the vehicle can be completed, the limiting and fixing position can be freely adjusted according to the actual wheelbase and other conditions of the vehicle, and therefore the purpose of adapting to different vehicles is achieved; and the disassembly and assembly work of workers can be facilitated.

The invention discloses a trailer traction mechanism protection frame, and belongs to the technical field of semitrailers. The trailer traction mechanism protection frame comprises a front protection frame body and a rear protection frame body which are connected to the bottom of a trailer carriage and arranged on the front side and the rear side of a saddle respectively so as to avoid unhooking of a trailer, an interlayer is arranged on the front portion of the trailer carriage, and a turnover mechanism is arranged in the interlayer; and the front protective frame is connected with the turnover mechanism. When the main frame and the trailer compartment are picked and hung, the turnover mechanism turns over the front protection frame into the interlayer, and the main frame is separated from the front end of the trailer compartment to be picked and hung. When the main frame is hung on the trailer carriage, the front protection frame is arranged in the interlayer, after hanging is completed, the turnover mechanism turns over the front protection frame out of the interlayer, and the front protection frame and the rear protection frame are arranged on the front side and the rear side of the saddle respectively. The safety risk caused by the fact that a main vehicle saddle locking mechanism or a trailer traction pin is accidentally damaged, slides forwards out of control to impact a cab or is abnormally separated in the running process can be effectively prevented.

The utility model discloses a container transportation semitrailer protection device, and relates to the technical field of container transportation. The protective device comprises a protective frame, a moving mechanism is arranged on the inner side of the protective frame, limiting mechanisms are arranged on the inner walls of the two sides of the protective frame, the moving mechanism comprises a limiting rod, the two ends of the limiting rod are fixedly connected with the inner walls of the two sides of the protective frame respectively, and two symmetrically-distributed limiting cylinders are arranged on the outer side of the limiting rod in a sliding mode. By means of the moving mechanism, stable sliding and positioning of the moving frame on the inner side of the protective frame are achieved, the accuracy and stability of moving of the moving frame are guaranteed through sliding connection of the positioning rod and the positioning cylinder, meanwhile, the moving frame is not prone to falling off, and the safety of the protective frame is improved. And the height can be limited in cooperation with a limiting mechanism, so that the purpose of adjusting the side protection height of the semi-trailer is achieved.

The invention belongs to the technical field of heavy-load transportation equipment, and discloses a semitrailer bearing type frame structure and a semitrailer, and the semitrailer bearing type frame structure comprises a longitudinal beam serving as a core bearing structure of a semitrailer frame; the cross beams are connected to the interiors of the longitudinal beams and used for strengthening the local strength of the frame; the rib plate is connected to the outer side of the longitudinal beam and used for supporting an object; the containing box is connected to the longitudinal beam and used for containing objects, and the lamp holder is connected to the longitudinal beam and used for achieving a warning effect; the alarm is connected to the longitudinal beam and is used for warning; the hydraulic rod can have the function of deflection angle adjustment, the supporting disc can actively adapt to the ground form when facing complex terrains such as ramps and potholes, local suspension caused by ground fluctuation is avoided, stable supporting of the supporting feet is guaranteed, and the applicability of a vehicle in scenes such as non-paved road surfaces and loading and unloading sites is improved.

The invention discloses automatic welding equipment for a longitudinal beam of a semitrailer, and relates to the field of automobile part manufacturing, the automatic welding equipment for the longitudinal beam of the semitrailer comprises two electric sliding rails and a self-adaptive flat welding structure used for welding a longitudinal beam main body, the tops of the two electric sliding rails are slidably connected with a rack, and the rack is connected with a welding platform; the self-adaptive flat welding structure comprises a rack, a hand climbing frame is fixedly connected to the side face of the rack, longitudinal sliding rails are fixedly connected to the positions, close to the two sides, of the interior of the rack, longitudinal electric sliding blocks are slidably connected to the interiors of the two longitudinal sliding rails, and connecting blocks are fixedly connected to the sides, close to each other, of the two longitudinal electric sliding blocks; and two sliding rods are fixedly connected between the two connecting blocks. By arranging the self-adaptive flat welding structure, the welding gun can track the position of a welding seam in real time, the shape deviation of the longitudinal beam is automatically compensated, it is guaranteed that the welding track is accurately aligned all the time and is not affected by the shape of the longitudinal beam body, the welding adaptability of equipment is improved, and different longitudinal beam bodies can be welded.

The utility model discloses a sectional type side dumping semitrailer carriage and a semitrailer thereof, the sectional type side dumping semitrailer carriage comprises a frame and further comprises at least two sections of independent carriages which are installed on the frame, a gap is formed between the two sections of independent carriages, and independent side turning can be achieved. Hydraulic cylinders are connected to the front side faces and the rear side faces of the independent carriages correspondingly and drive the independent carriages to turn on one side. A side plate which is opened inwards is arranged on one side of the independent carriage, the bottom of the side plate is connected with a movable sliding plate through a pin shaft, the sliding plate is located on the bottom face of the independent carriage, the free end of the sliding plate is connected with a telescopic plate, the sliding plate and the telescopic plate jointly form a bottom plate of the independent carriage, and the end, close to the telescopic plate, of the sliding plate is connected with a tensioning mechanism. A semitrailer comprises a sectional type side dumping semitrailer carriage. In the unloading process, each carriage can be independently unloaded, all the requirements of an existing side unloading semitrailer are met, and segmented independent unloading can be achieved.