Forklift soft and hard-wired connection gearbox vibration analysis and comparison tests

Nowadays, small tonnage forklift soft connection gearbox has become the trend and the trend, its excellent damping performance and driving comfort by more and more customers. electrical forklift also respond to market demand, has developed a new gearbox type, and for this soft and traditional hard-wired connection transmission gearbox, making comparative analysis of vibration.

Testing tools: a smart phone (equipped with acceleration sensors, equipped with vibration test software), double sided tape, cable ties and other fixed tool sleepy.

Note: The accelerometer on the phone, although not as professional precision and accuracy of the sensor, there is no professional data acquisition and analysis equipment, but still able to visually reflect two different gearbox support structure, different damping effect .

Test objects: soft connection gearbox Diesel Rough Terrain Forklift Truck 1, 2.5 tons, C240 engine; hardwired gearbox forklift 1, 2.5 tons, C240 engine. Like the rest of the configuration of two forklifts.

Test conditions: engine idling, the same two truck idling.

Note: With the increase in engine speed, vibration significantly reduced, so the test conditions to select the engine idling.

Test points: engine cylinder head, the seat surface, the left side of the steering wheel rim, front fascia frame Omo.

Forklift for sale

Data show that, although there are Chinese version of the Marshall Plan, "Fudge", but construction machinery sales this year, there has been no improvement. Data Industry Association show that in the four major construction machinery (excavators, loaders, bulldozers, rollers), and included in the statistics of 28 major excavator excavator factory in September 4559 units were sold, down 33% year on year , down 15% YoY; loader sales fell 24 percent to 10,001 units so far this year sales fell 10%; bulldozers, the 12 major manufacturers bulldozer bulldozers sold 535 units in September, down 252 units, a drop of 32.02 % total sales from January to September 6369 units, down 1318 units, a drop of 17.15%; 22 companies in September sales rollers 989 units, down 338 units, a drop of 25.47%.

In this context, the project has become a vehicle High Mast Diesel Forklift belongs one of the few bright spots. China Construction Machinery Association Industrial Vehicles Branch Secretary Zhang Jie told the China Securities Network reporter, before ten months of this year, construction vehicles are the only two to maintain growth of construction machinery sub-sectors, market demand, "the truck has been relatively stable. And now due to the rise of the downstream electricity providers, logistics construction investment has grown rapidly, while consumers of food, medicine and other logistics transit time there is growing demand for the product requirements, Diesel Rough Terrain Forklift Truck sales should be able to maintain double-digit growth every year. "

Forklift common system failures and approaches

Forklift use battery, diesel, propane and other industrial power for industrial energy forklift, currently more common mobile forklift are: electric forklifts, electric forklift trucks (the industry is generally divided into all-electric forklift trucks, semi-electric stacker) , electric cars, propane forklifts, diesel forklifts, etc., to the individual needs and design and production, such as reach trucks, gas powered forklift attachments (attachment of meaning is based on specific market needs to be redesigned for the forks manufactured to meet customer demand, the current common attachments such as dump, Paper clips, clamps drums, tires fixture, wooden clip and so on, the design is very flexible), etc., these are
all maneuvering the truck category. Tactical Truck class commonly used systems are: drive systems, lifting systems, hydraulic systems, braking systems, steering systems, the general failure of love on these five systems, systems approach common faults.

Drive system common faults and approach:
First, the clutch does not slip or separation, analyze the reasons for failure are:
1, the friction plate on top of the sticky oil or lining is damaged, this treatment approach is to clean or replace the friction plate friction plate;
2, combined with the state of the release bearing pressure in the release lever on top of this treatment approach is to adjust shorter cylinder pushrod assembly;
3, release bearing too much free travel, this treatment approach is to transfer cylinder assembly in the long putter;

4, the oil in the air, this approach is to drain the oil inside the air;
Second, the gearbox abnormal sound, analyze causes are:
1, excessive gear wear or bearing damage, this treatment approach is to replace the gear or replacement of bearings;

2, there is debris inside the gearbox, way to deal is to exclude debris.
Lifting system common faults and approach:First, the time is not synchronized gantry tilt, analyze the reasons for the failure is due to inconsistent or two tilt cylinder stroke cylinder bore size of the pipe joints closure due to the inconsistent, way to deal with the adjustable tilt cylinder 2 stroke and replace
with the same closure hole connector.
Second, the load can not lift the door frame, this is because the multi-way valve overflow
hole plug, multi-way valve by removing the overflow hole debris on it.
Third, the electric forklift trucks mast fell too fast, this is because the inlet valve speed does not work, the only limiting valve repair it.
Fourth, the fork mast down automatically, this is because of lack of hydraulic oil cylinder caused by the maintenance approach to multi-valve, add hydraulic oil.

The main reason for the forklift rust corrosion

Most factories forklift is an indispensable tool for the production of labor, of course, also be loss tool. Corrosion is the truck which consumed the culprit, now have to analyze the main reason for rust corrosion in the end what?

Forklift corrosion not only related to the environment and also its structure.

Forklift can be divided into internal combustion battery powered forklift and electric forklifts. Most internal combustion forklifts used in ports, terminals and mining sites, the use of the environment is bad, especially in ports and the chemical industry, by the subtropical, humid tropics, maritime environment and industrial emissions, the combined effects of dust, causing corrosion damage Forklift Parts corrosion is more serious; and battery forklift mostly used in warehouses and other indoor places, small changes in the environment, the corrosion caused by environmental factors is relatively light.

Stress generated inside the truck corrosive environments such as high temperatures generated by the engine and sulfur, chlorine ions and other combustion gas, generated mist battery, leakage, work of vibration, generated by the impact, friction, etc. caused by collision damage is caused by partial the main reason for corrosion damage all terrain forklifts Parts.

The main mechanism of metal corrosion is the original metal is converted to a metal oxide, resulting in structural parts or components to rust, damage can not be repaired or scrapped. The paint, rubber, fiberglass and other non-metallic materials aging, mainly after comprehensive environmental action by, the material structure of polymer pyrolysis, degradation, dissolution, and other physical and chemical changes, resulting in the appearance and performance. Forklift design itself visible structure, materials, processes and protective measures directly determine the corrosion resistance of the truck.

Use and maintenance of electric forklift hand while

Routine maintenance, class after work. 2, the level of technical maintenance, accumulated 100 hours of work, a group working system is equivalent to two weeks. 3, two technical maintenance, accumulated 500 hours, the equivalent of a quarter of a group working system. First, a routine maintenance, cleaning the truck dirt, mud and dirt Egypt, key positions are: YTO forklift frame and door frame slide, generator and starter, battery electrodes fork columns, tanks, air filter. 2, check all parts of fastening, focusing on: Fork supporting, lifting chain tensioning screw, wheel bolts, wheel fixed pin, brakes, steering screws. 3, check the foot brake, steering reliability, flexibility. 4. Check for leaks, focusing on: all fittings, diesel tank, sump, pump the brake, lift cylinders, tilt cylinders, tanks, pumps, engine oil pan, torque converter, transmission, drive axle, the main reduction , hydraulic steering, steering cylinder. 5, put the oil filter to precipitate.
Second, a technical maintenance in accordance with the "routine maintenance" project, and add the following work. 1, check the cylinder pressure or vacuum. 2. Check and adjust valve clearance. 3, check the thermostat is working properly. 4. Check the multi-valve, lift cylinders, tilt cylinders, steering gear if the fuel tank and pump is working properly. 5. Check the transmission's shift work properly. 6. Check and adjust the hand, foot brake, brake pads and brake drum clearance. 7, the replacement of the oil sump, check the crankcase ventilation takeover is intact, clean oil filter and fuel filter element.
8. Check the generator and starter motor is firmly installed, and lugs are clean firm, check brushes and commutator for wear. 9. Check the fan belt tightness. 10. Check the wheel is firmly installed, meets the requirement if the tire pressure, and clear debris embedded in the tread. 11, due to maintenance work and dismantled parts, when re-assembled to conduct the truck road test. (1) braking performance under varying degrees, there should be no deviation, hunting. On the steep slopes, after the hand brake tension, can reliably stop. (2) to listen to the engine under acceleration, deceleration, reload or load operation, etc., there is no unusual sounds. (3) road test some mileage, check brakes, transmission, front axle, gear pumps at the presence of overheating. (4) YTO rough terrain forklift lifting speed is normal, with or without shaking. 12, check the diesel tank of fuel filter has blocked imports of damage, and clean or replace the filter.
Three, two technical maintenance and except a technical maintenance projects, and add the following: 1, cleaning the tank, filters and piping, and check for corrosion, cracking collision case, after cleaning may not be used with fiber the yarn, cloth wipe. 2, cleaning torque converter, transmission, inspect parts for wear, replace with new oil. 3, check the drive shaft bearing, depending on the need to exchange universal joint cross-axis direction. 4. Check the drive axle fastening ministries and whether leakage, and clear pores. Dismantling the main gear, differential, wheel reducer, adjust the bearing axial clearance, add or replace oil. 5, dismantling, adjustment and lubrication of the front and rear wheels, axle were transposed. 6, cleaning brakes, adjust the clearance between the brake drum and brake shoe lining between. 7, cleaning liberal amount of rotation steering, check the steering wheel. 8, disassembly and cleaning gear pumps, pay attention to check the wear of the gear housing and bearing 9, demolition multi-way valve, the stem and the valve clearance check, do not open the safety valve, if not necessary. 10, check for damage and cracks knuckles, steering axle kingpin with the situation with the knuckle, dismantling the vertical and horizontal rod and steering arm joints wear. 11, removing a tire on the rim rust paint, check the tires and tubes and flaps, transposition accordance with the provisions inflated. 12. Check the connections are tight hand brake parts, adjusting the hand brake lever and foot brake pedal stroke work. 13. Check the battery electro-hydraulic proportion, as inconsistent with the requirements, the charge must be removed. 14, clean water tank and oil cooler. 15, check the shelves, frame without deformation, washable wheel, each accessory is reliable fixed, restocking weld if necessary. 16, dismantling the lifting cylinders, tilt cylinders and steering cylinder, replace worn seals. 17, check the instrument sensors, fuses and various switches, make adjustments if necessary. Fourth, the whole car or truck lubrication new truck stops working after a long time, within two weeks at the start of use, should be lubricated bearings for when lubrication, Chen should take advantage of new oil will all the oil out, and lubricate twice above, and should pay attention to the following points: 1, should be removed before lubricating oil cap, oil drain plug and nozzle above the dirt, dirt to avoid falling into the house. 2, with the grease gun lubricant injection pressure, injection pressure to be part of the components of the combination of the extrusion lubricant so far. 3, should be replaced in the summer or winter seasonal lubricant (oil, etc.).

Wheel Driving Diesel Forklift steering angle and steering systems for each component connections

check the adjustment of the clutch and brake pedal free travel and parking brake lever stroke operation, All Terrain Forklift inspection braking performance brakes, YTO forklift check and adjust V-belt tightness, check the battery electrolyte level, density and load voltage, check the engine oil, gear oil, hydraulic oil, coolant fluid levels,

diesel forklift trucks

 check the instruments, lighting, signal , switch button and vehicle accessory equipment operating conditions, check the hydraulic system distribution valve lever travel and work tank trip, check and adjust the tightness of lifting chain, check the door frame, fork work. Prime mover is the engine of internal combustion forklifts, high engine speed, low torque, and can not be reversed. The forklift when the job requires a lower speed, and to constantly changing direction of travel, wheels also have a large torque, for between the prime mover and a drive wheel, a set of prime mover can reduce speed and increase torque and steering means for converting the drive wheels, called the transmission.