China Taizhou Ruidong Import and Export Co., Ltd Company News

The main working environment of electric forklifts is warehouses, docks and other places, which need to transport heavy objects, so maintenance work needs to be done, otherwise it will bring potential safety hazards to operators. The following electric forklift manufacturers will share the maintenance content of electric forklifts: 1. Cleaning work. Clean the dirt and mud on the electric forklift, and focus on cleaning the forks and gate slides, generators, starters, electrode forks, water tanks, and air filters of forklift batteries. 2. Check the tightening of various parts of the electric forklift, such as: forklift support, lifting chain tensioning screws, wheel screws, wheel fixing pins, brakes, steering gear screws. 3. Check the reliability and flexibility of the foot brake and steering gear of the forklift. Check for leaks, forklift joints, diesel tank, oil tank, brake pump, lifting cylinder, tilt cylinder, water tank, water pump, engine oil pan, torque converter, transmission, drive axle, final drive, hydraulic steering , Steering cylinder. 4. Clean the sediment of the forklift oil filter. Replace the oil in the oil pan, check whether the crankcase ventilation connection is intact, and clean the oil filter and diesel filter element. 5. The electric forklift manufacturer reminds that during the maintenance process of the forklift, it is necessary to properly disassemble the parts. After the maintenance is completed, it must be assembled in time and the forklift road test should be carried out. 6. Check if the multi-directional valve, lift cylinder, tilt cylinder, steering cylinder and gear pump are working properly. Check whether the installation of the generator and the starter motor is firm, and whether the terminals are clean and firm, and check the carbon brush and commutator for wear. 7. Check the tightness of the forklift fan belt. Check whether the wheels are firmly installed, the air pressure of the tires is sufficient, and remove the debris embedded in the tread. Check the forklift diesel tank oil inlet filter for clogging and damage, clean or replace the filter. The above is the forklift maintenance method introduced by the electric forklift manufacturer. In addition, you must master the correct operation skills during use. After using it, place it in a dry and hygienic place to avoid direct sunlight.

When the electric forklift is in operation, if the operation method is improper, or the daily maintenance work is not in place, some problems will often be encountered. In order to help you quickly solve the related problems, the following electric forklift manufacturers will share in detail: electric forklift repair skills. 1. Vibration occurs when lifting. Causes of failure: Air has entered the lifting cylinder of the electric forklift, the hydraulic system is leaking oil, the size of the rollers and bearings of the inner mast fork frame is excessively worn, and the two lifting chains are unevenly tightened. 2. The walking motor is not powered. Maintenance method: check the power supply of electric forklift, main contactor, controller, accelerator, commutation walking motor contactor, bypass contactor, regenerative contactor, current sensor, module, diode, computer board, etc. 3. The free fall is too fast when there is a load. Causes of failure: oil leakage in the pipeline and joints, wear of the valve hole slide valve stem or seal ring of the multi-way valve, resulting in internal leakage, and the wear of the piston support ring of the lifting cylinder/Y-type seal ring, resulting in internal leakage. 4. The lifting speed of the electric forklift is too slow or cannot be lifted. Causes of failure: lack of oil in the oil tank, clogged oil filter, excessively high temperature of hydraulic oil, too thin hydraulic oil, leakage of hydraulic pipeline, improper pressure adjustment of multi-way valve. 5. Braking failure. Cause of the fault: the brake circuit is broken, the friction plate in the traction electrode control actuator is excessively worn, the brake is loose or the gap between the brake plates is too large. 6. Examples of electrical failures. Cause of failure: Suddenly there is no reflection of forward and backward lifting, the forklift is walking one by one, the forward speed cannot be adjusted, etc. 7. The forklift cannot start, the display does not respond. Maintenance method: Check whether the power supply, key switch, and main contactor of the electric forklift are all energized, and then check whether the main board is normal, whether the start-up board, display screen plug-in is loose. 8. Weakness of lifting, emergency stop of lifting, pressure relief, and lifting is not in place. Maintenance method: check whether the hydraulic motor and hydraulic pump are working normally, then check whether the hydraulic oil tank is short of oil, whether the hydraulic oil filter screen is blocked, and finally check whether there is any oil leakage in the oil cylinder.

The main function of the electric forklift contactor is to close, carry and disconnect the normal current frequently, and to open and close the overload current, which is mainly used to control the power supply of the electric forklift. The price of the electric forklift is mainly related to the quality of the component. Then let's take a look at the selection method of electric forklift contactor. 1. If you are controlling AC loads, you should choose AC contactors, and if you are controlling DC loads, you should choose DC contactors; 2. The use category of the electric forklift contactor should be consistent with the nature of the load; 3. Pay attention to the rated working voltage of the main contact, which should be greater than or equal to the voltage of the load circuit; 4. The rated working current of the main contact of the electric forklift contactor should be greater than or equal to the current of the load circuit. The rated working current of the main contact of the contactor is under the specified conditions (rated working voltage, use category, operating frequency, etc.) ) The current value that can work normally, if the actual use conditions are different, this current value should also change accordingly; 5. The rated voltage of the attraction coil should be consistent with the control circuit voltage. The electric forklift contactor should be able to pull in reliably when the coil rated voltage is 85% or more. In order to maintain the long-term stable working state of the electric forklift, it is necessary to select the appropriate electric forklift contactor. Through the use of the above methods, you can help you choose the right contactor.

Vehicle electric forklifts need to be properly inspected and maintained during use. In addition, when the following situations occur, major repairs are required. 1. The steering of the battery forklift is not easy to use. At this time, the forklift has potential safety hazards and needs to be shut down for inspection and major repairs; 2. The door frame of the battery forklift shakes, and a major repair is needed at this time; 3. The stability of the electric forklift is reduced, and failures often occur during use; 4. The braking system of the battery forklift is not good, and there are hidden safety risks. At this time, it is necessary to shut down and perform major repairs; 5. The abnormal noise of the motor of the forklift indicates that the motor is malfunctioning and the motor bearing needs to be replaced; 6. The operating parts of the electric forklift have a large gap and the appearance is worn out, indicating that the service life of the forklift has been reached at this time; 7. The consumable parts of the battery forklift are close to or reach the end of their life. For example, when the electric forklift is driving, there are noises in the gantry, drive axle, steering axle, and inside the car body. In short, when it is found that your vehicle electric forklift has the above-mentioned conditions, it is recommended not to continue working, but should stop, carefully check the forklift, record the failure, and carry out major repairs.  

All electric forklift trucks can not be separated from the battery to provide electrical energy to ensure sufficient power. The forklift can be used normally, but many users find that the battery heats up after the forklift is used for a period of time. What should I do if the battery of the electric forklift heats up? You can start with the following points. 1. Always test the battery temperature of a fully electric forklift by hand. When the lead-acid battery of the forklift is charging or discharging, its temperature should not exceed 35 degrees Celsius. If you feel the temperature when you touch the battery casing of the forklift, it means that it exceeds 35 degrees. 2. The temperature of the electric forklift battery exceeds 35 degrees Celsius, which will cause the oxide of the forklift plate to fall off easily, shorten the life of the battery of the electric forklift, or damage the forklift. 3. The main reasons for the high temperature of lead-acid batteries of all-electric forklift batteries are: (1) The continuous high current discharge of the forklift battery causes the temperature of the forklift battery to be high. It is recommended to shorten the discharge time of the large current when using a counterweight electric forklift. (2) The aging of the battery plate of the all-electric forklift increases the internal resistance of the forklift battery. The internal resistance generates a lot of heat during use, which will cause high temperature in the battery of the electric forklift. At this time, there is a certain potential safety hazard, so it is necessary to replace the battery of the counterweight electric forklift in time. In short, when it is found that the battery of the all-electric forklift has a high temperature phenomenon, it must be stopped to check the cause of the battery heating. If the temperature is too high, the battery should be replaced in time.

The electric hydraulic forklift is designed for the transportation of goods in the warehouse. It has the advantages of simple operation and low maintenance cost. If you want to maintain a good running state for a long time, you must master the maintenance skills of the electric hydraulic forklift. The following electric forklift manufacturers will briefly summarize it for you. 1. When charging the battery, disconnect the charging circuit from the chopper, otherwise it will affect the charging of the charger, and the overvoltage generated by the charger will damage the chopper. 2. During the first test run, raise the wheels. This will ensure that even if there is a connection error, there will be no danger. 3. The wiring from the battery to the electronic control should be arranged in parallel, as short as possible. 4. Regularly clean the dust inside the DC motor of the electric hydraulic forklift, check the carbon brush and spring. 5. The battery is the core of the electric forklift, so distilled water (pure water) should be added frequently. 6. When the vehicle is operating in a place with bad working conditions and difficult ventilation, the controller is forced to ventilate. 7. When the electric forklift is not used for a long time, leave the battery fully charged and keep it charged once every 1 to 2 months. 8. When operating the electric hydraulic forklift, the driver should try to avoid some unsafe operations, such as: do not slow down when turning, drive when the load is increased, overload the forklift, and drive on a sloping, soft ground. The above is the maintenance skills of electric hydraulic forklifts summarized by electric forklift manufacturers. In daily work, not only must you master the operation skills, but also keep in mind the skills of some daily maintenance methods.

Are electric forklifts special equipment? Many users are ambiguous about this problem. In fact, forklifts are special equipment and need to be certified to work, but battery trucks are for internal use only and internal training is enough, so they are not special equipment. What is special equipment? Special equipment refers to: boilers, pressure vessels (including gas cylinders, the same below), pressure pipes, elevators, hoisting machinery, passenger ropeways, and large-scale amusement facilities that are related to life safety and danger. Among them, hoisting machinery, passenger ropeways, and large-scale amusement facilities are electromechanical special equipment. Electric forklifts are hoisting machinery, used for vertical lifting or vertical lifting, and electromechanical equipment that moves heavy objects horizontally. The scope of the electric forklift is rated as a lift with a rated lifting weight greater than or equal to 0.5t; the rated lifting weight is greater than or equal to 1t, and the lifting height Cranes greater than or equal to 2m and electric hoists with fixed load-bearing forms, etc. Electric stacker trucks are special equipment, which belongs to the category of forklift trucks. The production of electric stacker trucks requires enterprises to have special equipment manufacturing licenses, and operators need to hold operation certificates issued by the Quality Supervision Bureau. In short, electric forklifts are electromechanical special equipment, and users need to hold a certificate to use them when using them.  

Electric forklifts often encounter abnormal voltages in lead-acid batteries during operation, so what are the causes and solutions? The following electric forklift manufacturers will share the relevant methods. First of all, we must understand that there are two phenomena of abnormal battery voltage. One is when the battery is charging, the voltage is high, and the voltage drops quickly during discharge. The other is that the battery is in use, and the voltage drops significantly. 1. When charging an electric forklift lead-acid battery, what is the reason why the voltage is high and the voltage drops quickly during discharge? Mainly sulphation of polar plates. Solution: According to the degree of sulfate, adjust the electro-hydraulic concentration, electro-hydraulic composition, charging current and other methods to eliminate the acidification of the polar plate. 2. What is the reason why the voltage drops significantly during battery use? The main reason is that the pole of a single cell of the battery is reversed, the pole group of the entire battery is reversed, the capacity of a single battery is low or there is a short circuit. Solution: According to the arrangement of the battery pack, it can be eliminated by checking the voltage of the single battery, whether the pole of the single battery is consistent with the group, and whether the battery group is in good condition. The above is the failure analysis of the voltage abnormality of the lead-acid battery of the electric forklift. In short, when the voltage is abnormal, the inspection work needs to be done to solve the failure in time, and the daily maintenance of the battery must also be done.

Analysis of the new situation of electric forklift development: 1. The needs of the times and the vast market. The country pays more and more attention to environmental protection, and nowadays young people have higher and higher requirements on the working environment. At the same time, because the land is getting more and more difficult, and storage can only be developed to high altitudes, battery forklifts include forward-moving Forklifts, narrow road forklifts, tractors, electric pallet trucks, stacker cranes, etc. will increasingly have markets. Second, the forklift industry will undergo major changes. In recent years, with the rapid development of China's economy, the development of all walks of life has new trends. It is worth mentioning the development of the logistics transportation and storage industry. The development of the logistics industry corresponds to the increasing demand for logistics equipment and transportation equipment. The forklift industry will undergo major changes. 3. The growth trend is on the rise. The growth of domestic forklifts is increasing at a growth rate of 25% every year. The emergence of electric forklifts has replaced the original traditional internal combustion forklifts. Today, domestic electric forklifts have surpassed internal combustion forklifts. 4. More environmental protection. Continuously reduce the emissions of electric forklift engines, increase the power of the hydraulic system, and do a good job in vibration reduction and noise reduction. Battery forklifts, natural gas, liquefied petroleum gas and other fuel forklifts will surely be further developed. 5. The weighing capacity needs to be improved. Electric forklifts are slightly inferior to internal combustion forklifts in terms of load capacity. In the next few years, the use of regenerative braking functions will effectively extend the service life of forklift batteries, reduce consumption, and achieve energy-saving and environmentally friendly requirements.

Many users responded to electric forklift manufacturers: Occasionally encountered heavy forklift steering phenomenon, so what are the reasons for this failure phenomenon? In summary, there are several reasons. 1. The tie rod and steering axle are bent or deformed, or the tire pressure of the electric forklift is insufficient. 2. The adjustment of the ball head device of the horizontal and straight rods is too tight and needs to be loosened. 3. The upper and lower bearings of the steering screw of the electric forklift are adjusted too tight, or the forklift bearings are damaged. 4. Lubrication of steering device is not good, such as: need to add oil in steering machine. The ball joints are not lubricated in time, so that when they work, the friction resistance increases. Turn the lower steering wheel, if you feel relaxed, it means that the internal lubrication of the steering gear is good, then check whether the transmission mechanism is too tight, and the transmission mechanism is poorly lubricated. If you find any problems, you should adjust and lubricate in time. 5. The meshing gap between the rack and gear fan of the electric forklift is adjusted too tightly. When performing fault diagnosis and discharge, remove the steering gear rocker arm, and if the steering wheel feels heavy, adjust the progress of the rack, gear fan, and screw bearing. If you feel unevenness or internal seizures, check the screw, steel ball, catheter clamp, rack, and bearings for roughness or damage. If necessary, it is recommended to repair or replace it directly. The above is the reason for the heavy steering of the forklift shared by the electric forklift manufacturers. It is recommended that when you encounter the problem of heavy steering of the forklift, you should start from the above aspects and conduct a one-by-one investigation to find the problem and solve it in time.