54results about How to "Avoid affecting driving safety" patented technology

The invention discloses a locking device of a foldable type truck compartment. The locking device comprises a truck compartment and an externally-arranged baseplate, wherein the externally-arranged baseplate is rotatably arranged on a truck compartment baseplate around a first rotating shaft horizontally arranged at the rear half part of the truck compartment baseplate; one end of the externally-arranged baseplate far away from the first rotating shaft is provided with a moving baffle plate; the moving baffle and the externally-arranged baseplate are connected in a rotatable manner through a second rotating shaft; a back baffle plate of the truck compartment consists of two baffle plates which are arranged on the baffle plates on two sides of the truck compartment in a hinging manner; when light cargoes need to be loaded, the back baffle plate is opened and the externally-arranged baseplate is turned out, and the moving baffle plate connected with the externally-arranged baseplate is connected with the opened back baffle plate to form a lengthened truck compartment, so as to increase the volume of the truck compartment and prevent stacking from affecting driving safety; and in addition, the truck compartment can be folded to shorten the length, thereby being beneficial for saving parking spaces. The locking device of the foldable type truck compartment is simple in structure and low in implementation cost and has stronger practicality in the field of light trucks.

The invention discloses a telescopic freight car which comprises a fixed car, a movable car arranged on the fixed car in a longitudinal reciprocating motion mode along the fixed car, a telescopic driving device arranged on the fixed car, and a locking device for locking or loosening the fixed car and the movable car. The motion output end of the telescopic driving device is connected with the movable car. When light cargo needs to be loaded, the locking device is loosened, the movable car is driven to extend backwards through the telescopic driving device, and then the movable car and the fixed car are locked through the locking device so as to increase car size and avoid effect on traffic safety caused by stacking. In addition, car length can be shortened so that parking space can be saved. The telescopic freight car is simple in structure, low in implementation cost, and practical in the field of light trucks.

The invention discloses a light alloy type special wheel. A rim is of an oppositely split structure. An inner rim body and an outer rim body are sealed through an O-shaped seal ring. The inner rim body and the outer rim body are connected through a bolt. The high-strength closely-pitched bolt is pressed into the inner rim body, wherein the high-strength closely-pitched bolt is in interference fit with the inner rim body. After the high-strength closely-pitched bolt penetrates through a bolt hole formed in the outer rim body, the high-strength closely-pitched bolt is connected with a nut with a flange and fastened through the nut with the flange, wherein the nut with the flange is matched with the high-strength closely-pitched bolt. The rim is provided with a built-in inflation channel and an inflating valve, wherein the inflating valve is connected with the rim in a threaded mode. A semi-depth groove is formed in the inner rim body. A boss for a supporting body is arranged at the bottom of the semi-depth groove.

The invention discloses a safety belt state reminding system, a safety belt state reminding control method and a vehicle. The safety belt state reminding system comprises a setting device, a safety belt state detection device, a control device and a reminding device, and the setting device is used for determining the safety belt state detection position according to a set instruction; the safety belt state detection device is used for detecting the safety belt state at the safety belt state detection position; the control device is used for sending a reminding instruction according to the safety belt state; and the reminding device is used for reminding according to the reminding instruction. According to the safety belt state reminding system, safety belt detection information can be updated in time, safety belt state reminding can be ensured, the situation that travelling is affected due to wrong safety belt non-fastening reminding can also be avoided, and the simple and convenient effects are achieved.

The invention provides a device for automatically detecting the abrasion of the pantograph pan of a locomotive online. A front trigger switch and a rear trigger switch connected with a data processing and controlling device are fixed to the lateral surface of a detection shed at the height thereof being the same as the pantograph pan; a left background plate and a right background plate are respectively mounted on the left and right lateral surfaces of the detection shed; four image sensors are mounted on the detection shed; wherein a rear left image sensor and a rear right image sensor with the forward and downward viewing angle are respectively aimed at the front parts of the right background plate and the left background plate, and the rear left image sensor and the rear right image sensor are respectively aimed at the right half part and the left half part of a front plate of the pantograph pan of the locomotive when the rear trigger switch is triggered; and a front left image sensor and a front right image sensor with the backward and downward viewing angle are respectively aimed at the rear parts of the right background plate and the left background plate, and the front leftimage sensor and the front right image sensor are respectively aimed at the right half part and the left half part of the pantograph pan of the locomotive when the front trigger switch is triggered. Accordingly, the device capable of carrying out the automatic non-contact dynamic detection on the locomotive online has the advantages of high detection accuracy, safe and convenient application, high stability and reliability and long service life.

The invention relates to an engine crankcase ventilation installation OBD diagnostic method based on an electrical circuit. The diagnostic method is based on a crankcase ventilation installation detection circuit; the detection circuit comprises a ventilation pipe and an engine controller 4; the two ends of the ventilation pipe are respectively in press fit with switch contacts of a first contactswitch and a second contact switch; one end of the first contact switch is sequentially connected with a PCV resistor and an ECU resistor in series and then is connected with a 5V direct current powersupply in the engine controller; the other end of the first contact switch is connected with the second contact switch in series and then is connected with ECU ground in the engine controller; and aPVC voltage detection point connected with an engine controller signal acquisition point is arranged between the PCV resistor and the ECU resistor. The diagnostic method comprises a first step of diagnosis enabling and a second step of high voltage diagnostics and low voltage diagnostics. The design has the function of diagnosis enabling, the judgment logic is rigorous and reliable, and also a visual warning system is adopted to prompt a driver and find faults in time.

The invention discloses an automatic windscreen wiper control method and system, and relates to the field of automobile control, and the method comprises the steps: obtaining first image data of a front windshield area of a vehicle at a first moment, and detecting the first image definition of the first image data; when detecting that the first image definition is smaller than or equal to a preset image definition threshold value, controlling the windscreen wiper to start wiping; acquiring second image data of the front windshield area of the vehicle at the next moment of the first moment, and detecting the second image definition of the second image data; and according to the first image definition and the second image definition, determining the definition change trend of the vehicle front windshield area, and adjusting the wiping speed of the windscreen wiper according to the definition change trend. According to the invention, the wiping speed of the windscreen wiper can be adjusted according to the change of the real-time rainfall, effective wiping is carried out, the situation that the driving safety is influenced by untimely wiping is avoided, and meanwhile, the situation that the service lives of the windscreen wiper and the windscreen wiper motor are influenced by mistaken wiping or too high wiping frequency is avoided.

An anti-misoperation structure for an ignition switch comprises a transmission rod which is linked with an ignition lock core of the automobile ignition switch and a shell; an electromagnetic valve is also installed on the shell, the electromagnetic valve is connected with main control unit through a circuit, a retractable push rod is arranged inside the electromagnetic valve, and the push rod extends into an inner cavity of the shell through a hole on the shell; and the transmission rod is provided with a groove which is matched with the push rod, when an automobile transmission case gear stays at a neutral gear state, the main control unit inputs a signal to the electromagnetic valve, the electromagnetic valve is conducted, the push rod is retracted under the effect of a magnetic field force, and the push rod is separated from the groove. Due to adopting the anti-misoperation structure for the ignition switch, the problems that the service life of an engine is influenced by easiness of the ignition switch on a non-corresponding gear caused by misoperation in the advancing process of a car can be solved, simultaneously the safety of the car can be improved, simpleness in structure is realized, and the anti-misoperation structure can be widely applied to the field of the ignition switch.

The invention discloses a novel hand-slip preventive brake pull rod for a railway truck. The novel hand-slip preventive brake pull rod comprises a hand-slip preventive guide frame, a pull rod head and a pull rod. Guide grooves are formed in the hand-slip preventive frame along the vertical direction of the hand-slip preventive frame, a carrier roll is arranged on the lower portion of the hand-slip preventive frame, a hand-slip preventive groove is formed in the pull rod head along the horizontal direction of the pull rod head, the pull rod head is arranged on the carrier roll and is connected with the hand-slip preventive guide frame by a hand-slip preventive pin which penetrates the guide grooves and the hand-slip preventive groove, and an end of the pull rod is fixedly connected with a tail groove of the pull rod head. The novel hand-slip preventive brake pull rod has the advantages that problems of clamping stagnation due to the fact that an existing hand brake pull rod for a railway truck slips out of an existing carrier roll at a sudden sectional change position of round steel and breakage of the existing hand brake pull rod due to fatigue and stress concentration at a sectional sudden change position of the tail of the existing hand brake pull rod can be effectively solved by the aid of the novel hand-slip preventive brake pull rod; the pull rod head still can be fixed onto the hand-slip preventive guide frame by the aid of the hand-slip preventive pin even if the tail of the pull rod is accidentally broken, a rod body of the integral pull rod head can be supported by the carrier roll without falling off, and accordingly the driving safety can be guaranteed.

The invention relates to a segmental type antiglare shield comprising more than two split antiglare shields. The two adjacent split antiglare shields are fixedly connected up and down, and the fixed connection strength between the two adjacent split antiglare shields is smaller than the structural strength of each split antiglare shield; and the upper part and the lower part of each of the two adjacent split antiglare shields are in rigid fixed connection and each split antiglare shield further comprises flexible connection structures, and the two ends of each flexible connection structure are connected to the two adjacent split antiglare shields. The entire antiglare shield can not be damaged when impacted by a vehicle, and can still be used after part of the antiglare shield is replaced; the flexible connection structures of the segmental type antiglare shield can avoid the influence on driving safety after the antiglare shield is separated; and after the upper part of the segmental type antiglare shield is impacted and separated, the lower part is not influenced and can still play the role in partially resisting glare.

The invention discloses a vehicle sun-protection cooling method and a realization device thereof. The realization device is installed at the top(or the required part) of a vehicle. The realization device is composes of a fixed bracket, a central shaft, a deflection shaft, a built-in tubular motor, a reflective heat insulation flexible material (referred to as ''reflective material'' in the invention), a control system, a central shaft, a pressing sheet and an accessory circuit, and others accessory parts / fittings. The vehicle sun-protection cooling method and the realization device thereof arecharacterized in that the realization device can be quickly retracted and opened to form an effective shelter space to cover the top, side faces and tail areas of the vehicle to isolate direct sunlight and high temperature conduction, so that the purposes of reducing the temperature inside the vehicle or greatly slowing down the speed of temperature rise in the vehicle, as well as protecting thevehicle under some conditions are achieved.

The invention provides a foreign matter puncture reminding method for a self-repairing tire and a related device. The method comprises the following steps: acquiring a tire pressure comparison result of each tire of a vehicle; aiming at each tire of the vehicle, if the tire pressure comparison result of the tire meets a first preset condition, determining that the tire has a foreign matter puncture risk; wherein the first preset condition is that the tire pressure of the current period is smaller than the tire pressure of the previous period, the tire pressure change rate of the current period conforms to a preset rule, and the preset rule comprises at least one of the condition that the tire pressure change rate of the current period is smaller than the tire pressure change rate of the previous period and the tire pressure change rate of the current period is smaller than a preset tire pressure change rate threshold value; and if it is detected that the vehicle has the tire with the risk of being punctured by the foreign matter, alarm information is output. According to the invention, the tire with the risk of being punctured by the foreign matter can be identified, sound-light alarm is given, a driver is reminded of the tire with the risk of being punctured by the foreign matter in time, timely treatment is needed, and the driving safety is prevented from being influenced.

The invention discloses a bicycle safety detecting alarming system and method. The bicycle safety detecting alarming system includes a controlling center processing device, a bicycle speed detection module, a vibration detection module and an alarming module, wherein the bicycle speed detection module, the vibration detection module and the alarming module are connected with the controlling centerprocessing device in a signal mode. The bicycle speed detection module is used for measuring the bicycle speed and sending bicycle speed information to the controlling center processing device. The vibration detection module is used for detecting whether a bicycle is in continuous vibration or not and sending the vibration strength and the duration time to the controlling center processing device. The controlling center processing device is used for receiving the bicycle speed information of the bicycle speed detection module and the vibration strength and the duration time of the vibration detection module, judging whether the bicycle is overspeed or not or a lock is picked up forcedly or not, and conducting alarming through the alarming module under the situation that the bicycle is overspeed or the lock is picked up forcedly. The bicycle safety detecting alarming system can conduct reminding when the bicycle is overspeed or is stolen, furthermore, the safety factor is improved, andthe property loss is reduced.

The invention provides a networked braking display screen of a haulage motor and a control method. The networked braking display screen has the functions of initializing a braking control system of the haulage motor, displaying the operating state of the system in real time and performing system diagnosis and recording. A color liquid crystal display (having the resolution ratio of 1024*768) is assembled at the front end of the braking display screen, and the operating state of the braking system is displayed; a touch screen and a film key are assembled at the front end of the braking displayscreen, and a man-machine interaction function is achieved. A CAN interface is formed in the rear end of the braking display screen, and communication is performed by adopting a two-way CAN bus. A daemon process is designed for the braking display screen to monitor the operation states of application programs, and the application programs are instantly restarted when accidentally discontinues or quits. By adopting the scheme, the stability and reliability of products are improved, and the working intensity of maintainers is reduced.

The invention discloses a rubber plate for railway level crossings and a rubber hold-down strip thereof, which are laid between two rails of the railway level crossing. The rubber plate comprises a plate main body and two concave trenches, wherein the plate main body is provided with a shoulder on each outer side of the two rails, and also is provided with at least one row of water fittings in parallel; the two concave trenches are respectively arranged on one side of each shoulder and respectively formed by the height difference between the top surface and the shoulder; and a plurality of combining holes are arranged in each concave trench. The rubber hold-down strip has the structure that the hold-down strip body is embedded in the concave trench of the rubber plate; a hollow buffer chamber is formed between the top surface and the bottom surface of the hold-down strip body; and a plurality of fixed bars are formed on the bottom surface of the hold-down strip body, and correspondingly inserted into the combining holes of the rubber plate.

The invention discloses a lighting method of an intelligent road lighting isolation belt. According to the invention, the function of blocking a lane can be realized, the light rays of the vehicle lamps can be blocked at night in order not to influence the opposite lane and ensure the driving safety. The light rays of the vehicle lamps on the lane can be projected to the road surface of the opposite lane, the lighting effect is realized, and the driving safety at night is greatly improved.

The embodiments of the invention provide a call control method, which is applied to an electronic device; the electronic device comprises a brain wave sensor, wherein the method comprises the following steps: when it is detected that the electronic device and an automobile central control system are in an interconnection state, switching the control mode of the electronic device into a brain wavecontrol mode; when a pass call request is detected, a brain wave signal of a user is acquired through the brain wave sensor; the passive call request is determined to respond according to the brain wave signal, and a call connection with an active calling party is built. According to the embodiments of the invention, the improvement of the intelligence, the security and the convenience of processing an incoming call request by an electronic device in a vehicle-mounted interconnection state is facilitated.

The invention relates to a charge control method and a charge control device. According to the charge control method, in the battery charging process, by determining an amount of attenuation of an electricity quantity for battery charging, a charge limiting voltage is regulated up, so that a usable electricity quantity is kept unchanged in previous and middle periods of a life cycle of the battery. In each charging process, by regulating up the charge limiting voltage according to the amount of attenuation of the electricity quantity for charging in the charging process, the usable electricityquantity is kept unchanged in previous and middle periods of the life cycle of the battery; a user cannot feel that a traveling distance of an electric vehicle is shortened; user experience is good;in the previous period, the charge voltage is low; and the charge control method and the charge control device are beneficial for prolonging the service life of the battery.

The invention provides a safety car vanity mirror, which belongs to the field of auto parts. The utility model solves the problem of potential safety hazards in the use of the existing car vanity mirrors. The safety car cosmetic mirror includes a main mirror base and a rectangular plate-shaped auxiliary mirror base. The main mirror base is an inverted L-shaped plate structure, and includes a mutual horizontal plate and a vertical plate. The sides are connected, and the lower long side of the horizontal plate is provided with hinge part 1, and the upper long side of the auxiliary mirror base is provided with hinge part 2, and the auxiliary mirror base is hinged on the lower side of the horizontal plate through the cooperation of hinge part 1 and hinge part 2 , and there is a two-way return torsion spring between the first hinge part and the second hinge part, and the two-way return torsion spring drives the auxiliary mirror base, so that the two sides of the auxiliary mirror base are respectively aligned with the two sides of the main mirror base, and the main mirror base and the auxiliary mirror base are aligned. The mirror bases are combined to form a rectangular plate-like structure, and the hinge axes of the first hinge part and the second hinge part are parallel to the sides of the horizontal plate. The car vanity mirror can avoid affecting driving safety.

The invention discloses a power station lifting system, and the system comprises an auxiliary frame used for being connected with a longitudinal beam of a vehicle body chassis and a power station lifting chassis used for installing and lifting a power station. The power station lifting chassis comprises a lifting platform used for installing a power station, trapezoidal lead screws capable of relatively moving in the height direction of the auxiliary frame, motors driving the trapezoidal lead screws and sensors used for judging whether the bottom ends of the trapezoidal lead screws make contact with the ground or not, wherein the motors and the sensors are in one-to-one correspondence with the trapezoidal lead screws. The trapezoidal lead screws are connected with the lifting platform, and the motors are connected with the force sensors so that the motors can stop rotating when the corresponding trapezoidal lead screws make contact with the ground. After the trapezoidal lead screws make contact with the ground, the motor controls the trapezoidal lead screws to continue to descend, and rotation is stopped when the distance between the bottom face of the lifting platform and the upper end face of the auxiliary frame reaches the preset height. Therefore, lifting and resetting of the lifting platform are achieved through the trapezoidal lead screw, vibration of the power station is isolated by separating the power station from the vehicle body, and the stability of signal transmitting or receiving of the antenna servo system is effectively guaranteed.

The invention belongs to the technical field of using non-macromolecular organic matter as ingredients in the chemical industry. It uses lactic acid fermentation cell residues and lactic acid to prepare and extract waste liquid as main raw materials, and prepares bacterial residue waste liquids such as amino acid ammonium salts and polypeptide acid ammonium salts, and lactic acid sodium salt waste liquids. and lactate ammonium salt waste liquid, the above three waste liquids were concentrated to obtain acidolysis concentrate, sodium lactate concentrate and lactate ammonium salt concentrate, mixed according to the weight fraction ratio of 30:40:30, and obtained by spray drying. Salt-based organic acid salt environment-friendly deicing agent particles, the whole process is simple, low cost, good economic benefits, no secondary waste liquid and residue, the product can be completely degraded after snow melting, a good solution to the problem of inorganic salt snow melting The disadvantages of lactic acid fermentation can be eliminated, and the waste residue and waste liquid of lactic acid fermentation can be reused, which improves the added value of lactic acid fermentation production.

The invention discloses a road isolation belt with a lighting effect. The road isolation belt is characterized in that a plurality of positioning piles are arranged at a highway isolation place; two parallel transverse plates are arranged between every two adjacent positioning piles; a plurality of light shading louver boards which are parallel to each other are arranged between the two transverseplates at intervals; the light shading louver boards are obliquely arranged; the tilt direction of the light shading louver boards is consistent to a lane driving direction; a plurality of sets of light collecting illuminating mechanisms are arranged between every two adjacent positioning piles at equal intervals; and the light collecting illuminating mechanisms are used for projecting the lightrays of a car lamp on one side of a lane to the other side of the lane. By means of the structural arrangement, the light rays of the lanes on the two sides can be completely isolated, the influence on the driving safety due to mutual interference of the light rays of the lanes on the two sides is avoided, and meanwhile, air and sound can be normally transmitted and circulated between the lanes onthe two sides; the road surface of the lanes on the two sides can be illuminated by using the light rays of the car lamp at night or under a condition of dim weather, the light uniformity of the roadsurface is improved, the field of view of a driver is clearer, and the running safety is improved.

The invention discloses a vehicle control method, device and equipment and a medium. The vehicle control method comprises the steps that when gear switching operation of a driver is detected, a vehicle driving state is obtained; and according to the vehicle driving state, a gear shifter is controlled to switch gears or not according to the gear switching operation of the driver. According to the vehicle control method, device and equipment and the medium, the situation that parts in a gearbox are damaged and the driving safety is affected due to misoperation of the driver can be avoided.

The invention discloses a hidden kitchen ware room for a vehicle trunk, and the room comprises a vehicle body; a storage cavity with an upward opening is formed in the vehicle body, a closed cavity isformed in the upper end of the storage cavity in a communicating mode, a rotating shaft is rotatably arranged on the front inner wall and the rear inner wall of the right side of the closed cavity, and a closing plate is fixedly arranged on the rotating shaft; the closing plate enables the storage cavity to be completely closed, and the lower end of the closing plate is fixedly provided with a fixed plate. According to the food material processing device, a driver can process food materials by himself / herself when the driver is in a traffic jam or a sparsely populated place at a high speed, so the situation that the driving safety is affected due to the fact that the driver feels uncomfortable due to the fact that the driver eats raw food materials is avoided; during high-speed traffic jam, the situation that the life safety of a human body is affected due to physical discomfort caused by eating incapability is avoided.

The embodiments of the invention provide a call control method, which is applied to an electronic device; the electronic device comprises a brain wave sensor, wherein the method comprises the following steps: when it is detected that the electronic device and an automobile central control system are in an interconnection state, switching the control mode of the electronic device into a brain wavecontrol mode; when a pass call request is detected, a brain wave signal of a user is acquired through the brain wave sensor; the passive call request is determined to respond according to the brain wave signal, and a call connection with an active calling party is built. According to the embodiments of the invention, the improvement of the intelligence, the security and the convenience of processing an incoming call request by an electronic device in a vehicle-mounted interconnection state is facilitated.

The invention discloses a device for eliminating bumping at a bridgehead of a soft soil foundation. The device comprises a bridge abutment, a soil retaining platform, a tower plate and a stress bracket, the tower plate is arranged between the bridge abutment and the top of the soil retaining platform; the stress support comprises a cross table, a first supporting component and a second supporting component. The cross-shaped table is fixedly connected with the butt strap, one end of the first supporting component and one end of the second supporting component are rotationally connected with the two sides of the cross-shaped table respectively, the other end of the first supporting component and the other end of the second supporting component are rotationally connected with sliding seats, the stress support is in sliding connection with the sliding grooves through the sliding seats, and elastic pieces are further arranged in the sliding grooves. The elastic piece abuts against the end of the sliding base. By the adoption of the design, the stress support is arranged between the approach slab and the soil retaining platform, impact force acting on the approach slab is counteracted through the stress support, the phenomenon that the baffle settles and forms slab staggering with an embankment is avoided, meanwhile, the spherical support is arranged between the bridge abutment and the approach slab, impact force acting on the connecting position of the approach slab and the bridge abutment is reduced, slab staggering is avoided, and the safety of the embankment is improved. The driving safety is influenced.

The invention relates to the field of railway bridge underwater pier disease inspection, in particular to a railway bridge underwater pier disease detection device using an underwater robot to carry acoustic, optical and mechanical equipment and water surface control processing equipment, and surface defect detection of a bridge underwater structure is achieved. The technical problem of the invention is to provide a railway bridge underwater pier disease detection device which comprises a workboat, an underwater robot, a mechanical scanning sonar, a multi-beam sonar and the like. The workboat floats on a water layer, the bridge pier is located in the water layer, the workboat is connected with an underwater robot through a circuit, the underwater robot is located in the water layer, a mechanical scanning sonar is arranged on the underwater robot, and a multi-beam sonar is arranged on the underwater robot. The multi-beam sonar is arranged, the multi-beam sonar is used for finely scanning the surface of the underwater bridge pier, surface diseases of the underwater bridge pier are found by observing real-time sonar images, the condition of the underwater bridge pier can be mastered in time, related dangerous cases can be handled in advance, and driving safety is prevented from being affected.

The invention discloses a mute control method for a vehicle machine, a server and a control terminal. The mute control method comprises the steps of receiving voice control information; acquiring front-end volume information, mute state information and control trigger information according to the voice control information, and acquiring mute control data according to the front-end volume information, the mute state information and the control trigger information; comparing the mute control data with a preset volume threshold to obtain mute adjustment information; and sending the mute adjustment information to the front end. The technical problems that in the prior art, the volume control mode is single, adverse effects are likely to be caused to driving, the user experience of music playing equipment is poor, and applicability is low are solved.

The invention discloses a stepping device for getting on a car, which relates to the technical field of auto parts. It includes a stepping bracket and a stepping plate. The stepping bracket is fixed on the fuel tank band through a mounting bracket. It is hinged with the step bracket, and the range of movement of the inner side of the step plate is within the step bracket; the outside of the step bracket has a support part supporting the step plate; an elastic limit mechanism is arranged between the support part and the step plate, and the elastic limit mechanism includes The limit pin shaft fixed on the inner bottom surface of the step plate and the limit shrapnel assembly installed on the support part, the limit shrapnel assembly has two limit shrapnels that are always clamped to the limit pin shaft, The bit shrapnel is arranged opposite to the length direction of the step plate. The invention solves the problem that the existing stepping device for a large-volume fuel tank vehicle cannot meet the requirements of stepping comfort and safety while ensuring the width of the entire vehicle.