Rough terrain crane

electric wire rope hoist manufacturerOff-road tyre crane in the workDeveloped a kind of crane is 70 s, its similar to tyre crane hoisting function, also can undertake no leg hoisting and lifting. The difference is the structure of the chassis and the unique chassis structure caused by the improvement of the performance of the drive. This kind of cr...ane motor are mounted on a chassis, chassis has two axle and four large diameter cross-country decorative pattern of the tire. Four wheels are the driving wheels and the steering wheel, when on the uneven muddy construction site transfer station, the four wheels are passing the power, namely, four-wheel drive, to improve the ability of through the muddy ground and uneven road surface. When in the flat surface with faster speed, only the two front axle and rear axle wheel drive, in order to reduce energy consumption. In random file, crane with four-wheel drive, 4 * 4 4 x 2 said four has two wheels is driving wheel axle. The model is suitable for the work in the narrow. Can realize stepless speed change continuously, under the condition of the pavement resistance mutations will not shut down engine, thus greatly convenient for the operation of the driver. Can the cross-country tire crane is a kind of extended performance, powerful and flexible tyre crane.double girder overhead crane manufacturers

electric wire rope hoists

double girder overhead travelling craneHumans use hoisting machinery has several one thousand years of history, ancient Egypt and the Roman empire with original crane, built huge walls. But when the crane is fixed legs more. After entering the industrial age, movable mechanical crane arises at the historic moment. After hundreds of years of develop...ment, the mobile crane has been derived ground crane truck crane, crawler crane, and etc., large branch. This is drawn according to the description of the ancient Roman engineer Vitruvius block and tackle, crane with two fixed pulley and a movable pulley. There are ancient books claimed this crane was invented by the third century BC by Archimedes. electric wire rope hoists，This is drawn according to the description of the ancient Roman engineer Vitruvius block and tackle, crane with two fixed pulley and a movable pulley. There are ancient books claimed this crane was invented by the third century BC by Archimedes.  Auto Crane, Truck Crane,) in the early twentieth century originated in Europe. Its use truck chassis,

cranes

gantry crane with a truss arm or hydraulic telescopic boom box, can on ordinary roads and assignments; With compact structure, fast transfer, restricted by area small, low cost, etc. All Terrain Crane (All Terrain Crane) originated in Europe in the 1960 s. It adopts specially designed multi-axis all-wheel drive chassis, oil and gas suspension, hydraulic shock, which can realize all-wheel steering, full bridge drive; eot cranes with a truss arm or hydraulic telescopic boom box. Compared the two, all terrain crane has higher adaptability, lifting ability is stronger, higher technology content, cost, of course, also be doubled. In 1890, the British COLES company developed railway scooter as chassis, with vertical steam boiler for cranes, thousands of tons of lifting capacity, rails can rely on. This is the end of the 19th century, the typical structure of mobile cranes. COLES company was once Europe's biggest crane company, founded in London in 1879, the founder of Henry James COLES (1847-1905). Henry at the age of 13 to enter s. orssam machinery factory work, started his own company at the age of 32, to produce 2-10 tons rotary steam crane as the main business. Henry's death in 1905, his eldest son took over the company.

explosion-proof overhead crane

Lifting mechanism includes a motor, brake, reducer, drum and pulley. Motor through reducer, drive roll rotation,explosion-proof overhead crane so the rope around the roll or from roll down to lift heavy objects. Small frame is the bracket and install the hoisting mechanism and operating agencies and other parts of the car chassis, usually welded structures.
Drive mode crane operating agencies can be divided into two categories: one category is focused on the driver, which uses an electric motor to drive the long sides of the Active Wheel drive shaft; another kind were driven wheel that is active on both sides of each with a single motor ,Single Girder Gantry Crane  The more frequent use of a combination of a small bridge crane brakes, gear units and motors into one of the "triple play" drive mode, a large general overhead crane lifting weight for ease of installation and adjustment, often using universal coupling drive .
Crane operation agencies generally only four active and driven wheels, if the weight is large, commonly used methods to increase the wheel from the wheel pressure to reduce. When more than four wheels, a frame must be balanced hinge means that the crane load is evenly distributed on each wheel.

gantry crane rules

1. Gantry crane respond brakes, hooks, ropes and safety devices and other components required check card check and found abnormal, magnet crane should be thoroughly excluded. The operator must confirm the walkway or on unmanned orbit, we can close the main power supply. When there are signs on the lock or power circuit breaker, the person shall be closed original main power removed. 2. Gantry crane working class for the first time when lifting heavy objects (or the maximum load weight), should be lifting height of 0.5 meters from the ground after the heavy down again, check the brake performance, reliable after confirmation then normal operation. Operator in the job, should be required for the following operations to ring the alarm. ① lifting, landing weight; great start when the car driving. ② traveling gantry crane is unclear when the line of sight through to continuous-ringing alarm; ③ traveling crane when the crane near the cross in another. ④ lifting heavy objects near the staff. Operation running under a unified command signal should be. Work in a power outage, the controller should handle all placed in the "zero" position, re-work should be checked before the crane movements are normal. Large cranes, trolley during normal operation, parking brake open anti prohibited; transform large trolley direction of movement, the handle must be placed in the "zero" position,  crane spare partso that after a complete stop functioning institutions in order to reverse to drive. There are two hooks of the crane, when the main and auxiliary hook switch to time and two hooks highly similar, the main and auxiliary hook must work alone, in order. to avoid a collision of two hooks. 3 gantry crane hook after work should be raised to a certain height, carts, trolley stops at the specified location, the controller handles placed in the "zero" position; pull down the protective box switch handle, cut off the power. Routine maintenance. Do shift work.

Crane Categories

1, according to the lifting TYPE: mobile cranes, tower cranes, mast crane eot cranes.
In rectangular space and over the job, and more for workshops, warehouses, open yard loading and unloading goods, etc., the beam cranes, bridge cranes, gantry cranes, cable cranes, carrying bridges.
2, according to the structure, it is divided into the bridge crane type (bridge crane); cable type; arm shelf (self-propelled, tower, gantry, rail-style, floating boat-mast cranes).

Optional gantry crane

Under normal circumstances gantry crane, 50t lifting capacity in less span of less than 35m, no special requirements, should use a single main beam. If the required width of the gate leg,Coil Bar and Plate Handling Cranes high working speed, or frequently lifting heavy parts, grew up pieces, you should choose double girder gantry crane. Gantry crane span is an important factor affecting their quality. Selection, to meet the conditions of use and premise equipment meets span series of standards, should be minimized span.
Tread determine the principles of
(A) to meet the requirements of the stability of the crane gantry along the track direction;
(B) cargo dimensions to be able to pass the legs flat steel;
(C) pay attention to the track B and span S proportional relationship, and generally track B = (1/4-1/6) S.
Sizing gantry crane spacing
At work, the door should be left between the external dimensions and yard cranes and cargo space transportation vehicle access certain size in order to facilitate loading and unloading operations.workshop gantry crane When loading and unloading transport vehicles generally within the span, the door should be kept with the legs have more than 0.7m spacing. Spreader should not work in more than 0.5m spacing and transport vehicles, cargo when the legs get married, there should be more than 0.5m spacing.