A-type Gantry Crane

A-type Gantry Crane

Weihua Crane Machinery Co., Ltd.

Address:Industry Park, Changyuan, Henan, P.R.C




A-type Gantry Crane is A-type double girder gantry crane; consists of A-type gantry frame steel structure, trolley, crane traveling mechanism, electrical system and other main components. Outdoor operation gantry crane also equipped with rail clamp, weight restriction device, limit device of each mechanism, as well as various safety devices in accordance with prescribed safety procedures of cranes. Sometimes the crane also equipped with rail clamp device, anchor device, anemometer, corrective devices, etc. as required.
A-type Gantry Crane-double girder gantry crane with hook are used for handling and lifting materials in open storage, stock ground, railway freight station, ports and so on. It can also carry out some special operations by equipped with various special lifting tools.
Its load handling device is hook, grab or electromagnetic chunk (lifting magnet), or simultaneously use with the two or three. There have three forms of gantry frame structure: double cantilever, single cantilever and non-cantilever. When its load handling device is hook, the crane working level is A2 ~ A6, when it is grab or electromagnetic chuck, the crane working  level is A4 ~ A7.

A-type Gantry Crane

Weihua Crane is professional material handling equipment manufacturer and servicer with largest production in global. Provide you with overhead crane, gantry crane, electric hoist, etc. of safe, reliable and efficient crane solutions and services.


Main Structure and components
A-type Gantry crane consists of gantry frame steel structure, trolley, crane traveling mechanism, electrical system and other major components.
To facilitate transport, loading, unloading and installation on site, on the main components set up lugs, hanging holes, etc. used for lifting. The intensity and location of these lugs and hanging holes fully consider lifting safety and convenience.
A-type Gantry Crane
Gantry frame steel structure
Gantry crane steel structure mainly consists of the main beam, supporting legs (when large span using of one rigid leg and one flexible leg), end beams, saddle (no saddle when no cantilever), trolley traveling track, bottom cross beam and other components. Connect the main beam, end beam, legs, saddle, bottom cross beam together by high strength bolts.
Main Girder
Main girder use welding box type or truss type. Main girder cross section uses the ANSYS finite element calculation method for systematic analysis and calculation.
A-type Gantry Crane ANSYS calculation
Main beam camber is (1 ~ 1.4) S / 1000, and the maximum camber position is controlled in range 1/10 of the span middle. The main beam force piece material is Q235 or Q345 (similar to Fe37 or Fe52), minimum plate thickness is more than 6mm.
Landing Leg
Adopt welded box-shaped, leg consists of the upper flange, lower flange, steel plate or welded steel support. Upper flange is large and lower flange is small, so that the legs become upper big and lower small variable cross-section structure, can effective bearing loads of vertical and horizontal directions.
Driver’s Cabin
Driver’s cabin is the workplace that the operator manipulate crane, its structural type design has taken into consideration the needs of a variety of functions, durable, safe and reliable, and also considered a good view, comfortable and beautiful, to make the driver feel comfortable during operation.
In order to ensure the operator vision, before the top, before the bottom side wall and rear wall of the driver’s cabin are fitted with tempered glass, driver’s seat with a maximum elevation at 55 ~ 60 °, the maximum angle 70 ~ 75 °, the driver fixed maximum positive perspective 120 °, seat rotating angle of the front can up to 270 ° of viewing range.
Driver’s cabin structure welded of steel plate and steel, mounted on a bracket below the main beam. Its connection should be solid and reliable, with sufficient strength and rigidity.
Various settings arranged in driver’s cabin, give full consideration to the driver of convenient maintenance, easy manipulation, unobstructed walking and active space. Guaranteed the driver can quickly and safely withdraw in accident situations.
Platform, Ladder
Where it is need operation, inspection, repairing there equipped with safe and reliable ladder, platform and walkway, and it is with enough work space. Platform walkway equipped with railings, its height is 1050mm, anywhere of the railing can afford 1kN load from any direction without causing plastic deformation. Consider non-slip safety measures on platform walkway.
The trolley is mainly composed of one or two sets (main and auxiliary lifting) hoisting mechanism, trolley traveling mechanism and trolley frame.
Hoisting Mechanism
Hoisting mechanism mainly consists of: reel, lifting motor, lifting reducer, brake, wire rope and hook (or grab, electromagnetic chuck) and other components.
Lifting mechanism operating principle: Motor acting through the gear shifting speed, and then driving drum through drum coupling, finish hook hoisting through wire rope winding system. After power off, the brake closed, hook stop hoisting and keep the lifting object still in the air.
Lifting mechanism including main and auxiliary lifting mechanisms, arranged in the same trolley frame, each set with separate driving device, main and auxiliary lifting mechanisms not only can finish the lifting and handling independently, but also can be coordinated to complete the work of turning over object.
Each component of lifting mechanism with compact layout, easy maintenance, ensure safe and reliable.
Trolley Frame
Trolley frame is steel plate welded combination structure, with sufficient strength and rigidity to ensure normal work of each agency after trolley frame deformation under load. Outdoor work trolley uses sealed form rain cover, the rain cover with daylighting measures.
Trolley traveling mechanism
It consists of traveling motor, running reducer, wheel sets and other components. The trolley equipped with stopper device, rail clearer, buffer, traveling limit and other safety devices.
Trolley traveling mechanism operating principle: After power on, the brake open, motor acting output power, shifting speed by reducer, driving wheels via drive shafts and couplings, then complete crane forward and backward movement, after power failure, the brake closed, trolley stop traveling.
Crane Traveling Mechanism
Crane traveling mechanism adopts respectively drive form. It consists of motor, brake, reducer, wheel sets, drive shafts, couplings and other components.
Crane traveling mechanism operating principle: After power on, the brake open, motor acting output power, shifting speed by reducer, driving wheels via drive shafts and couplings, then complete crane forward and backward movement, after a power failure, the brake closed, crane stop traveling.
Crane traveling wheels are four or eight (will be more in special circumstances), wheel and the angle bearing box with roller bearing (or 45ºsplit structure bearing box) mounted on the balance wheel set after assembly.
Crane traveling mechanism three-dimensional diagram of wheel set structure

Gantry crane Operation
All agencies operated by driver’s cabin, control lifting, crane and trolley traveling. Cabin fitted with an emergency stop button; press this button for an emergency cut off the whole crane power supply.
Crane with an emergency power-off switch, in case of emergency, you can cut off the crane total power, the switch is located in the power distribution cabinet.
Motor is equipped with fully functional protection device, overcurrent, short circuit fault of the motor can be effectively protected.
Crane has zero protection, when the agency prepared to operate or power is restored, the controller must first be placed in the zero position, then press the start button, the motors of all agencies can start.
With warning bell, work prompted by a foot switch.
Overload load limiters: Crane with overload load limiters, when load reaches 90% of rated, the display device will automatically alarm; when the load reaches 105% of rated, the crane will automatically cut off the power supply of hoisting mechanism.
Rising limit position protection device: hook lifting mechanism with limit device, when hoisting to a limit position, automatically cut off the lifting power supply.
Stroke limiter: both sides of crane and trolley traveling mechanism are equipped with stroke limiter, it will automatically cut off power when crane and trolley traveling to the limit position, then they can traveling in the opposite direction.
Crane equipped with lost pressure and zero protection; the driver can make emergency power off in a convenient operation place.
Doors of driver’s cabin and bridge frame has electrical interlock protection device.
In crane legs there has sound and light warning, emergency stop button box and crane rail clamp.
For the crane lifting height exceeds 30m, install anemometer and aviation obstruction lights on the top.
For the wild use crane, with open around and no high-rise buildings, also set up lightning protection device.
For span more than 40m, the crane will be taken synchronized or corrective protective measures.

Technical Data

Crane technical parameter is an indicator of the operational capability of the crane, its main parameters including: lifting capacity, lifting height, span, working-level, working speed, etc., you can check the general drawing. Various components (such as: reducer, motor, brake, etc.) operation and maintenance, please refer to the manual.
A-type Gantry Crane Sketch50t 75t A-type Gantry Crane Technical Parameter

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Weihua Cranes Machinery Co., Ltd.

Weihua Crane standard
Weihua Cranes started since the year 1988; it is professional material handling equipment manufacturer and servicer with largest production all over the world. With Weihua Cranes historical influence, “China Crane Town” (which covers more than 2/3 crane market in China) developed in the area around Weihua Cranes headquarter.
Weihua Cranes main businesses are researching, developing, manufacturing and sales of all kinds of lifting equipment. We have passed the ISO9001 quality system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health and safety management system certification, CE certification, etc.
Weihua Cranes advantages and differences with other crane manufacturers are that we have professional crane team to provide you with safe, reliable, efficient crane solutions and services, and as far as possible to reduce your cost. Crane your business, let’s develop together!


Excellent Product and Solutions

Weihua Cranes become one of general hoisting machinery manufacturing industry leader with the largest production and sales volume. We can provide electric hoists, single/double beam overhead cranes, gantry cranes, and such varieties of lifting equipment 10 serious more than 200 types. The lifting capacity of the overhead crane can achieve 1000t, and the gantry crane 900t, to meet all kinds of project need.
Cranes is committed to provide total optimized crane program solution and perfect service to help customer to save cost and improve efficiency.


Advanced R&D | Strong Q&C | Production capacity

Weihua Cranes has Technology Testing and Inspection Center authorized by the state, post-doctoral research station, obtains 283 technology patent certificates and inventions, R & D team of Weihua with 600 people and with Shu-zi Yang (academician from the Chinese Academy of Engineering) as the foregoer, is the biggest one in general purpose crane industry in China.
Cranes now adopted the “lean production management”, the undaunted testing and outstanding market performance, ensuring Weihua Cranes stand out as the leading brand within crane industry. Weihua Cranes continuously make the innovation on technical and strict on QC management to keep the products quality steady improving.

Weihua Cranes total asset is of 0.78 billion US Dollar, over 6000 employees, covers an area of 3.42 million square meters, one of Weihua Cranes workshop is the largest within the whole world crane industry. A varieties of 1700 sets manufacturing and testing equipment, including machining, heat treatment, welding, assembly, testing and packaging shipped metering and other ancillary equipment with a full range of advanced production scale and production capacity.

Outstanding Marketing Performance & Long-term Partner

Production and sales of overhead and gantry cranes won the first in China for continuous 8 years. And now, total production amount of Weihua Cranes products achieve world first. Weihua Cranes has developed strategic partnership with Siemens, GH Spain, Demag, SEW, Schneider, etc.

Weihua Cranes are widely used in machinery manufacturing, iron and steel metallurgy, nuclear industry of mining, water conservancy and hydropower, roads and railways, electric power, automobile manufacturing, petrochemical, port logistics, shipbuilding and other material handling, etc. We have successfully exported to more than 90 countries and regions such as the United States, Great Britain, Russia, India, Brazil, Peru, South Africa, Mongolia, South Korea, Australia, Southeast Asia, the Mid-East, etc. And get well reputation.
Weihua Cranes with strong capacity, focus on customer service, provide with first-class quality, safety and reliable products, create more and more value for customers, these are the reasons we set-up stable and long-term relationship with our customers.


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