288 results about "Car manufacturing" patented technology

The invention relates to the technical field of automobile manufacturing, in particular to a flame-retardant coating detection device and a flame-retardant coating detection method. The flame-retardant coating detection device comprises a baffle plate, a supporting plate, a cover plate and a supporting plate which are enclosed to form a closed test cavity. The baffle is provided with a first mounting hole for fixing a fire source, the supporting plate is provided with a corresponding second mounting hole for fixing a temperature detection piece, the cover plate is provided with an insertion hole for mounting a sample, and the supporting plate is provided with a smoke suction assembly. The device is simple in structure and convenient to operate, a fire source and a temperature measuring point can be effectively fixed, the testing efficiency and accuracy are improved, testing is conducted in a closed environment, the smoke suction function is integrated, safe and environment-friendly harmful smoke is guaranteed, the safety and health of operators are comprehensively guaranteed, and environmental pollution is avoided.

The invention discloses a rigid-flexible switching type four-door hinge installation tool and method based on pneumatic sequential logic, and relates to the technical field of automobile manufacturing equipment, and the rigid-flexible switching type four-door hinge installation tool comprises a positioning and clamping operation module, a ground pushing chassis module and a pneumatic sequential logic floating module. The floating module comprises a three-dimensional decoupling mechanism, a normally-closed self-resetting mechanism and a normally-open delaying locking mechanism. The pneumatic control system is provided with three parallel branches including a reset unlocking branch, a clamping operation branch and a delay locking branch with a one-way sequence valve, and a pure pneumatic logic time sequence is constructed by utilizing the characteristic that an opening threshold value is set between dynamic pressure and stable pressure. By means of the scheme, accurate switching of pushing rigidity, positioning flexibility and tightening rigidity can be automatically achieved only through on-off of a single air source, complex electrical control is abandoned, the rigid and flexible requirement contradiction in follow-up assembly is effectively solved, vehicle body damage caused by time sequence disorder is avoided, and hinge installation accuracy and equipment reliability are improved.

The invention discloses a strategy generation method and system based on a multi-modal large model, and is applied to the whole process of automobile manufacturing. According to the method, production line visual images, process texts and sensor data are collected, cross-modal feature adaptive fusion is realized through a multi-modal large model, modal weights are adjusted according to production stages, and an initial strategy is generated in combination with manufacturing process knowledge; and outputting a target strategy adaptive to production through feedback iterative optimization. The system integrates a data acquisition module, a cross-modal fusion module, a strategy generation module and an optimization module, realizes weight scenarized adjustment based on large model dynamic learning, and accurately maps a production state. According to the method, a fixed weight mode is broken through, deep correlation reasoning is performed through multi-source data, the strategy adaptability and effectiveness are improved, intelligent decision making is supported, and automobile intelligent manufacturing is enabled.

The utility model discloses a material drying device for removing VOC (Volatile Organic Compounds) of a PC / ABS (Poly Carbonate / Acrylonitrile Butadiene Styrene) modified material, which relates to the technical field of automobile manufacturing and comprises a material drying tank, a discharging base is fixedly arranged at the bottom of the material drying tank, a feeding pipe is fixedly connected to the left side of the top of the material drying tank, and an air outlet mechanism is arranged on the right side of the top of the material drying tank. A guide funnel is fixedly mounted above the inner ring of the material drying tank, a discharging funnel is fixedly mounted at the bottom of the inner wall of the material drying tank, three charging funnels are uniformly arranged between the guide funnel and the discharging funnel, and vertically staggered discharging grooves are respectively formed in the tops of the two charging funnels close to the lower part of the guide funnel. According to the discharging device, the charging hopper, the electric push rod, the turntable, the movable connecting rod, the pull rod, the conical plug and the screw rod are matched with one another, so that the discharging work can be quickly carried out without manual operation, the discharging efficiency is improved, and the problem of omission is also avoided.

The invention belongs to the technical field of automobile manufacturing logistics, and particularly relates to an automobile part tray stowage optimization method based on a genetic algorithm, and the method comprises the steps: 0, obtaining material demand data; the method comprises the steps that 1, all materials belonging to the same supplier and sent to the same factory crossing are merged into independent material groups; step 2, for each material group, calculating the minimum vertical stacking column number of each material; step 3, taking the first-level required materials in each material group as loading objects, and optimizing a loading scheme by using a genetic algorithm to obtain a first-level material loading scheme; step 4, for one material group, acquiring all secondary demand material data, and performing ascending order arrangement according to demand time; then, the sorted secondary materials are traversed in sequence, and whether the secondary materials can be filled into the remaining position of the tray or not is judged; and a demand optimization loading scheme of the material group is obtained. According to the method, collaborative optimization of tray space utilization rate maximization and tray use number minimization can be realized.

The invention belongs to the technical field of automobile manufacturing, and particularly discloses an intelligent flexible production scheduling method and system for automobile orders, and the method comprises the following steps: collecting order demands of a user; according to the order delivery time requirement of a user, reversely deducing production plans of a coating workshop and a welding workshop by taking the general assembly workshop as a starting point to obtain a production plan of a production line; according to the demand within a period of sales, in combination with the material arrival rhythm, the workshop capacity and the sales demand successive date factor, daily production vehicles are discharged, and according to the selected daily production vehicle distribution result and the final assembly lean production proportion requirement, constraint conditions are set, and coating production sorting and scheduling calculation are carried out; and on the basis of the scheduling, a welding vehicle queue plan is generated in combination with a coating workshop production plan in a user order demand. By adopting the technical scheme, production scheduling is carried out by using a production scheduling reverse pushing mode based on the production characteristics of the automobile orders, flexible production scheduling of the automobile orders is realized, and the efficiency is improved.

The invention relates to the technical field of high polymer materials, and discloses a furyl polyurethane adhesive and a synthesis method thereof, polymer polyol is used as a soft segment, isocyanate and two specific furyl chain extenders are used as hard segments, polymerization is performed through a one-step method, and the method has the advantages of simple process, short flow, mild reaction conditions and the like. Wherein a furan ring and an amide group of the two specific furyl chain extenders endow the material with rigidity and excellent bonding performance, and form a high-density hydrogen bond network with a hydrazide group, so that the mechanical strength, the toughness and the bonding performance of the material are remarkably improved. By regulating and controlling the proportion of the components, the rigidity and flexibility of the material can be effectively balanced, so that the polyurethane adhesive with excellent comprehensive performance is prepared. The furyl polyurethane adhesive prepared by the invention has relatively high adhesion strength and mechanical strength, and can be applied to the fields of buildings, automobile manufacturing, medical treatment, packaging, aerospace, electronics and the like.

The invention relates to the field of high polymer materials, and particularly provides a bio-based polythiol curing agent and a preparation method and application thereof.The bio-based polythiol curing agent is obtained through reaction of polyether polyol, epoxy chloropropane and a sulfhydrylation reagent, the epoxy chloropropane is prepared from bio-based raw materials, and the sulfhydrylation reagent is prepared from polyether polyol. The invention relates to epoxy chloropropane, in particular to epoxy chloropropane prepared by a glycerin method, and the mass content of 2, 3-epoxypropane methyl ether in the epoxy chloropropane is less than 0.4%. By controlling the content of 2, 3-epoxypropane methyl ether in the bio-based epoxy chloropropane, the humidity and heat resistance of a polythiol adhesive system applied to the downstream can be improved. The epoxy adhesive prepared from the epoxy resin has the advantages of higher humidity and heat resistance, higher adhesive property, higher glass transition temperature and longer service life, can reduce the maintenance cost, and is widely applied to the fields of electronic and electrical appliances, automobile manufacturing, aerospace, architectural decoration and the like.

The invention relates to the technical field of automobile manufacturing, and discloses a front wall outer plate assembly which is characterized in that a plate body and flow guide covering parts on the two sides are manufactured through an integrated forming process, a traditional multi-part splicing mode is replaced, the number of parts is reduced, the production cost is reduced, meanwhile, the assembly tolerance accumulation risk is reduced, and the attractiveness is improved; secondly, a through hole is formed in the bottom of the mounting groove in a penetrating mode, the bottom of the mounting groove can make contact with the vehicle logo, the contact area is increased, the mounting stability is improved, meanwhile, the closed cavity is broken through the through hole, and the situation that the vehicle logo is difficult to detach due to the negative pressure adsorption effect is avoided; and finally, the flow guide part is connected to the flow guide covering part, the blades can divide the opening into a plurality of air inlets, layered design is achieved, airflow is divided into ordered airflow, wind noise generated by vortexes is reduced, the ventilation effect is improved, wind resistance is remarkably reduced, the flow guide covering part and the flow guide part are detachably connected, replacement of accessories at different flow guide angles is supported, and cost is reduced. And the method has relatively high applicability.

The invention relates to the field of automobile manufacturing, and particularly discloses a control method for opening deformation of a longitudinal beam of a non-bearing automobile body and a tensioning tool. The method is characterized in that after a vehicle body and a vehicle frame are initially positioned and before final assembling, the two ends of a tensioning tool are positioned and installed on a left longitudinal beam and a right longitudinal beam; a quick clamp of the tool is operated, opposite tensioning force is applied to the longitudinal beam, and the opening size of the longitudinal beam is actively restrained; under the constraint state, frame fastening, power assembly assembling and other operations which are prone to deformation are completed; and finally, releasing the constraint and unloading the tool. The tool comprises a fixed body, a movable body, a positioning pin, a transmission mechanism and a quick clamp with a self-locking function. According to the invention, through an active control process of'restraining first and then assembling ', the elastic deformation of the longitudinal beam in the assembling process is effectively inhibited, the quality defects caused by the elastic deformation of the longitudinal beam, such as poor matching of front-end parts and abnormal clearance surface difference, are fundamentally solved, and the assembling precision, the production efficiency and the consistency of the whole vehicle are remarkably improved.

The application belongs to the technical field of automobile manufacturing, in particular to a new energy van chassis, which comprises a chassis main body, a rear anti-collision beam is installed at one end of the chassis main body, a battery pack is arranged at the end of the chassis main body away from the rear anti-collision beam, a plurality of through holes are formed in the inside of the chassis main body, two groups of lifting plates are fixed on the two sides of the battery pack, two groups of guide grooves are formed in the two sides of the inside of the chassis main body, the lifting plates are slidingly connected in the inside of the guide grooves, an oil pressure buffer is installed at the top end of the lifting plate away from the guide groove, a camera is arranged below the battery pack; the lifting plates slide in the guide grooves and are buffered by supporting springs, so that the impact suffered by the battery pack when contacting a protruding object can be reduced, the baffle can lift the battery pack before the battery pack contacts the protruding object, and the battery pack is slowly lowered by the oil pressure buffer, whether the bottom end of the battery pack is damaged is detected by the camera, and the unstable situation in the use process of the battery pack is reduced.

The embodiment of the invention provides a movable ship loader tripper car manufacturing method and a movable ship loader tripper car, and relates to the field of ship loader tripper cars. The problems that an existing tripper car is long in manufacturing process, difficult to assemble, difficult in size control and high in high-altitude operation risk are solved. The method comprises the steps that a connecting support flange is connected with a supporting leg connecting flange, and a machining line is drawn with the supporting leg connecting flange face as a datum plane; the belt rack is manufactured in a split mode, and the flange and the rolling assembly are disassembled; a temporary process support is welded to the joint of the tripper car platform and the cross beam; assembling on a low-altitude jig frame; and the perpendicularity of the supporting legs is adjusted. The movable ship loader tripper car is manufactured through the method. Through the method, the machining precision of the key component is guaranteed; the welding seam position is reconstructed, and construction is convenient; size compensation allowance is preset, a temporary process support is welded, and the node assembling gap and the opening size are effectively controlled; the aerial work difficulty is reduced through low-altitude assembly; the perpendicularity of the supporting legs is adjusted, and manufacturing precision and efficiency are improved.

The invention belongs to the technical field of automobile manufacturing, and discloses a chassis assembly and a heavy truck. The device comprises a main body beam, a first support and a second support, the first support and the second support are installed on the main body beam, an air filter is clamped between the first support and the second support, and a fender is installed on the side, away from the air filter, of the first support; the problems that in the prior art, a support for installing an air filter and a fender needs to be independently installed and subjected to mold opening, and the manufacturing and installing cost is high are solved.

The utility model discloses a car door opening degree fixing clamp and relates to the technical field of car manufacturing, the car door opening degree fixing clamp comprises an installation frame, a sliding column, an elastic limiting assembly, a first fastener and a second fastener, the installation frame comprises a frame body, a first sliding shaft and a second sliding shaft, the frame body is connected with a car door through the first fastener, and the first sliding shaft is connected with the second sliding shaft through the second fastener. The sliding column is connected with the door frame through a second fastener, and the first sliding shaft and the second sliding shaft are both movably installed on the frame body. According to the technical scheme, the first limiting groove is formed in the sliding column, the first sliding shaft can slide into the first limiting groove relative to the sliding column, the first limiting groove limits continuous movement of the first sliding shaft relative to the sliding column, and therefore the automobile door is limited to be further away from the door frame, and the opening degree between the automobile door and the door frame can be accurately adjusted and fixed; and it is ensured that the vehicle door can keep the fixed opening degree on the spraying production line, the robot can recognize the spraying area more accurately, and therefore the more uniform spraying effect is achieved.

The utility model discloses a rigidity measuring device, and relates to the technical field of automobile manufacturing. The rigidity measuring device is used for measuring the rigidity of the automobile door, the rigidity measuring device comprises an air pressure regulator and a displacement measurer, the air pressure regulator is used for regulating the air pressure in the automobile so as to form a preset air pressure difference with the outside of the automobile, and the displacement measurer is used for measuring the displacement of the automobile door to be measured under the preset air pressure difference. According to the invention, the rigidity of the to-be-tested automobile door of the automobile can be determined through displacement.

This invention discloses a compressed air purification system, relating to the field of compressed air purification technology. The compressed air purification system of this invention includes a spray device and a swirl-jet absorption device. The spray device includes a sprayer and a first working fluid tank, and the swirl-jet absorption device includes a swirl-jet absorber and a second working fluid tank. The inlet of the sprayer is connected to the first outlet of the first working fluid tank via a pipeline, the second outlet of the first working fluid tank is connected to the inlet of the second working fluid tank, and the outlet of the second working fluid tank is connected to the inlet of the swirl-jet absorber. This compressed air purification system solves the technical problems of limited applicability and low controllability of existing compressed air purification systems, and can be widely used in compressed air energy storage industries in the petroleum, chemical, metallurgical, power, machinery, light industry, textile, automobile manufacturing, electronics, food, pharmaceutical, biochemical, defense, and power energy storage fields.

The invention belongs to the technical field of automobile manufacturing training, and particularly relates to an automobile assembly all-work-type training detection training platform and training method. The training platform comprises a frame type bearing structure, a multi-process detection module group, a visual identification unit, a display feedback module and a power supply and main control unit. The frame-type bearing structure comprises a frame, an operation training table is installed on the top of the frame, and assembly rails are arranged on top cross beams and side beams of the frame. The multi-process detection module group comprises a rubber plug detection module, a plug detection module, a buckle detection module and a bolt and nut detection module; the visual identification unit carries out full-coverage shooting on the operation training platform; the display feedback module is used for synchronously displaying the detection result of each module in the multi-process detection module group in real time; a microprocessor and a data storage module are arranged in the power supply and main control unit. The system adopts an integrated design and a visual feedback mechanism, has a real-time monitoring function, and can greatly improve the training efficiency.

The invention relates to the field of automobile manufacturing, in particular to a coating, a sunshade curtain and a preparation method and application of the sunshade curtain. The coating is prepared from the following components in parts by weight: 30 to 40 parts of fluorine modified acrylic resin, 15 to 25 parts of titanium dioxide, 10 to 20 parts of zinc oxide, 10 to 20 parts of aluminum oxide modified PVDF-HFP (Polyvinylidene Fluoride-Hexafluoropropylene) composite particles, 5 to 10 parts of silicon carbide, 8 to 12 parts of hollow glass beads and 2 to 4 parts of auxiliaries. According to the coating, the excellent technical effects of high reflection, high radiation, low heat storage and ultra-strong durability are jointly achieved through specific selection and matching synergistic effect of the functional components.

The invention provides a powder coating with high stamping adaptability. The powder coating is prepared from components in percentage by mass as follows: 55%-70% of modified epoxy-polyester resin, 5%-12% of a flexibilizer, 5%-10% of nano inorganic filler, 3%-6% of a microencapsulation repairing agent, 0.5%-2% of a conductive material, 9%-12.5% of high-temperature-resistant resin, 0.5%-1.8% of a lubricant, 0.5%-1.8% of an adhesion promoter, 1.2%-2.5% of a leveling agent and 0.3%-0.5% of a processing aid. The coating has high stamping adaptability, self-repairing performance, antistatic performance and high temperature resistance, can be applied to the fields of automobile manufacturing, household electrical appliance products and the like, and can effectively improve the vibration reduction effect and the processing performance of the composite metal plate. The invention further provides a high-stamping-adaptability pre-coating vibration reduction composite metal plate which comprises a metal base plate, a damping adhesive film layer and the powder coating, and the vibration reduction performance and the stamping performance are synergistically improved through a layered composite structure.

The utility model relates to a special-shaped work fixture for an automobile chassis, which belongs to the technical field of automobile manufacturing and comprises a mounting component and a plurality of special-shaped work fixtures, the special-shaped work fixtures are mounted on the top of a sliding component slidably connected to the upper portion of the mounting component, and a sliding table of the mounting component is provided with a sliding groove. A servo motor matched with the sliding assembly drives the lead screw to rotate, so that the sliding block drives the tool table to slide along the sliding groove. By means of the structure, accurate position adjustment of the special-shaped chassis part in the horizontal direction is achieved, the problems that a traditional tool clamp is fixed in a positioning mode and cannot meet the requirements of various machining positions are solved, the pneumatic cylinder of the special-shaped tool clamp drives the movable part to rotate around the hinge base, the non-slip mat on the movable block is driven to be attached to the irregular surface of the part, self-adaptive clamping is achieved, and the machining efficiency is improved. By means of the design, the problem that the special-shaped part is difficult to clamp is effectively solved, and the application range of the tool clamp is widened.

Production plant (10) for the series production of motor vehicles (100, 102) of different motor vehicle types and / or different model variants, with the following features: - the production plant (10) has several workstations (20, 22) at each of which at least one predetermined work process for the series production of the motor vehicle (100, 102) can be carried out, and - the workstations (20, 22) are interconnected so that, after completion of the work process at one workstation (20), the motor vehicle (100, 102) to be produced can be transported to the next workstation (22), and are characterized by the following features: - at least one workstation (20) has a receiving area (30) on which at least two load carriers (40) with components (42, 44) can be placed for the specified work process, - the workstation (20) has an upstream zone (60) in which a large number of load carriers (40) with components (42, 44) for the workstation (20) are kept, - the production plant (10) has a transport system (50) which is suitable for delivering the load carriers (40) with components (42, 44) to the receiving area (30) and for picking up empty load carriers (40') from the receiving area (30), and - the receiving area (30) is designed for the placement of load carriers (40) with different components (42, 44) for motor vehicles (100, 102) of different vehicle types and / or different model variants.

The invention relates to a car door gripper mechanism and car door gripping equipment, and relates to the technical field of car manufacturing auxiliary equipment.The car door gripper mechanism comprises a gripper frame, and a quick-change disc is arranged on the gripper frame and used for being connected with a robot; and the multiple grabbing mechanisms are all arranged on the grabbing hand frame, the multiple grabbing mechanisms are arranged in the circumferential direction of the grabbing hand frame, the grabbing mechanisms are used for grabbing the vehicle door assembly, and all the grabbing mechanisms can grab the vehicle door assembly at the same time. Due to the fact that all the grabbing mechanisms can grab the car door assemblies at the same time, on the same car model production line, all the car door assemblies can be grabbed at the same time, car door tongs do not need to be switched due to changes of car door assembling, time wasted when the car door tongs are switched in the welding process is shortened, production efficiency is improved, and the problem that in the prior art, in the car door switching process, the car door tongs cannot be switched is solved. In the prior art, a robot needs to pause welding operation to complete gripper replacement, so that the welding rhythm is interrupted, particularly in a single-vehicle-type multi-door integrated production line, frequent switching further aggravates production line pause, and the overall production efficiency is reduced.

The invention provides a detection method, device and equipment for adjusting equipment in a vehicle, and is applied to the technical field of automobile manufacturing quality testing, and the method comprises the steps: sending an adjusting instruction to equipment to be tested through a vehicle machine control system, so as to drive an adjusting motor of the equipment to be tested to execute a corresponding adjusting action. The motor current and the corresponding motor temperature of the adjusting motor in the process of executing the adjusting action and the state parameter of the to-be-tested equipment after the adjusting action is executed are obtained. And determining a correction current interval for adjusting the motor according to the motor temperature. And determining that the adjusting function of the to-be-tested equipment is normal under the condition that the motor current is determined to belong to the corrected current interval and the state parameters accord with the expected state parameters corresponding to the adjusting instruction, so that the problems of relatively low detection efficiency and relatively low accuracy existing in a traditional detection method for the vehicle internal adjusting equipment can be solved.

The invention belongs to the field of polymerization, and particularly relates to a cross-linked acrylate polymer and a preparation method thereof. A soft monomer (31.4%-37.4%), a hard monomer (1.7%-2.0%), acrylic acid (0.2%-3.0%), an urushiol glycidyl ether crosslinking agent (1.2%-18%) and a mixed solvent (50%-59%) are mixed according to a specific ratio, and a segmented dropwise adding process and a vacuum defoaming curing technology are combined to prepare the adhesive. Compared with the prior art, the cross-linked acrylate polymer has the following advantages: 1, the cross-linked acrylate polymer shows excellent heat resistance and can meet the ever-increasing requirements of the market on high-performance cross-linked acrylate polymers; 2, urushiol glycidyl ether is derived from natural raw lacquer, has functionality and sustainability, and has good environmental protection value; 3, the prepared cross-linked acrylate polymer keeps excellent performance in a high-temperature environment and is suitable for various high-temperature application scenes such as automobile manufacturing, military equipment and electronic materials, and the application range of the acrylic cross-linked acrylate polymer is further expanded.

The present invention provides a power on and off control system and control method for a power dial switch of a commercial vehicle, belonging to the field of automobile manufacturing technology, comprising a battery; the positive pole of the battery is connected to the hand-dial switch, and the negative pole of the battery is connected to the vehicle body ground; one output end of the hand-dial switch is connected to a distribution box, and the other output end of the hand-dial switch is connected to a UPS power supply; the negative pole of the distribution box is connected to the vehicle body ground; the output end of the UPS power supply is connected to a controller and a first servo motor; the controller is connected to the first servo motor, and the first servo motor is driven by a driving mechanism to connect to the hand-dial switch. The present invention controls the power on and off of the power dial switch through a remote control key and has a prompt function, which greatly shortens the time taken by the driver to park the vehicle, greatly reduces the possibility that the driver forgets to turn off the power dial switch when parking the vehicle, can effectively avoid the problem of battery collapse, and simplifies the process for the driver to park the vehicle.

The invention belongs to the technical field of automobile manufacturing, and particularly discloses a production optimization method and system based on workshop key in-process monitoring deduction after order production scheduling, and the method comprises the following steps: taking an actual time point as a collection instantaneous time point, and automatically collecting in-process data of each order of a workshop; setting production rhythm data of each line body in a future production day to obtain a pre-production plan; presetting the maximum value and the minimum value of a working point based on the working data of each sequence and the pre-production plan, comparing with each working point of the pre-production plan, judging whether the placement of each working point of the pre-production plan is reasonable or not, and if the working point is not reasonable, feeding back the result to the production scheduling system to formulate a reasonable production plan; data in the production process are analyzed in real time, abnormal conditions and potential problems are detected, and if the abnormal conditions are detected, an early warning mechanism is triggered. According to the technical scheme, transparent in-process deduction is provided, in-process changes of joints are obtained, and a reasonable production plan is made.

The invention relates to the field of automobile manufacturing, and discloses an intelligent gear shifting control method for a new energy reduction gearbox. According to the method, driving data such as the speed, the road condition and the motor rotating speed are collected in real time through a vehicle-mounted communication module and transmitted to a management platform for analysis, and a gear shifting strategy is generated. The automatic transmission system controls the two-gear speed reducer and the drive axle to complete gear shifting according to the strategy, and meanwhile data are recorded through the OTA and gear shifting logic and an energy management strategy are optimized. After gear shifting is completed, the system verifies whether the gear is matched with the actual requirement or not, and the driving efficiency is ensured. According to the method, the vehicle-road cooperation and machine learning technology is utilized, the dynamic gear shifting decision is achieved, the dynamic property and economical efficiency of the new energy vehicle are improved, and the method is suitable for complex road conditions and load-carrying scenes.

The invention relates to a magnetic switch for starting an automobile, which relates to the technical field of new energy automobile manufacturing and comprises a switch body and two binding posts fixedly arranged at one end of the switch body. Two opposite protective shells are arranged outside the end face, facing the binding post, of the switch body, and protective cavities are formed in the side faces, close to each other, of the two protective shells. A mounting opening is formed in the side face, facing the switch body, of the protective shell, a locking piece is arranged, a wiring notch is formed in the edge of an opening of the mounting opening, and a positioning protruding block is fixedly arranged on the inner wall of the opening; a limiting groove is formed in the switch body; the side edges, away from the switch body, of the two protective shells are rotationally connected through a rotating shaft. According to the invention, after the binding post and the connecting cable are in butt joint, the two protective shells are rotated oppositely to a protection state that the two protective shells are close to each other, and muddy water, dust and other impurities splashed on a muddy road surface are effectively prevented from making contact with the joint of the binding post and the cable.