Crane Bridge And Trolley

Crane Bridge And Trolley is a common lifting equipment, widely used in many fields such as industry, warehousing and construction. It has a simple design, easy operation and high cost performance.

The working principle of Crane Bridge And Trolley is relatively simple: the lifting mechanism is driven by the motor to move the hook up and down, so as to realize the lifting and placement of goods. The trolley moves on the main beam, and the motor drives the operating mechanism, so that the crane can move in the working area to realize the horizontal transportation of materials.

The design and manufacturing process of Crane Bridge And Trolley is relatively simple and easy to maintain. The cost is low and suitable for enterprises with limited budgets. It is easy to use and suitable for operators of all levels. It is suitable for a variety of industrial environments and has high flexibility.

Crane Bridge And Trolley is equipped with a variety of safety devices, such as limit switches, overload protection devices, sound and light alarm systems, etc., to ensure safety during operation. At the same time, the equipment design follows relevant safety standards to ensure reliability under high-intensity working conditions.

5. According to the specific needs of customers, Crane Bridge And Trolley can be customized, including lifting capacity, span, lifting height and control method, etc., to meet the diverse needs of different users.

Warranty of core components：2 years

Core Components：Bearing, Gearbox, Motor

Weight (KG)：8000 kg

Feature：Bridge Crane

Condition：New

Max. Lifting Load：20t

Span：from 3-60m

Overseas Installation：Available

Control Method：Cabin or Remote

Working duty：A5~A8

Pictures & Components

1.Main beam

1) The main beam usually adopts structural forms such as I-beam, box beam or H-beam. Box beam has good bending resistance and is suitable for large-span cranes, while I-beam is often used for small cranes. The main beam is generally made of high-strength steel to ensure sufficient load-bearing capacity and durability during operation. Commonly used materials include Q235 and Q345 steel.

2) The main beam bears the heavy load when the crane is working, including the load of the hook, the weight of the lifting mechanism, and external loads such as wind. The design of the main beam needs to ensure sufficient rigidity during operation to prevent deformation and vibration, and ensure the stability and safety of the crane. The main beam is also used to support the running track of the trolley, the lifting mechanism, and the installation of electrical and control systems.

3) The length of the main beam is usually determined according to the specific application and workspace requirements, and the common span range is 6 meters to 30 meters. The load-bearing capacity of the main beam directly affects the lifting capacity of the crane, and is usually designed to be 0.5 tons to 20 tons. The height and shape of the main beam will affect the lifting height, and the actual requirements of the working environment must be taken into account during the design.

Lifting System

1) Working principle of lifting system

Motor start: The operator starts the motor through the control system.

Deceleration: The motor drives the reducer to convert high-speed rotation into low-speed and high-torque rotation.

Drum rotation: The reducer transmits power to the drum, causing the drum to rotate and drive the wire rope or chain to rise and fall.

Hook lifting: As the drum rotates, the hook rises and falls to lift or place the goods.

2) Technical parameters of lifting system

Lifting height: According to the design requirements of the crane, it is usually between 3 meters and 30 meters.

Lifting capacity: According to different application scenarios, the rated lifting capacity of the lifting system is usually between 0.5 tons and 20 tons.

Motor power: Select the appropriate motor power according to the lifting capacity and lifting height.

 

3.End carriage

1) Function of the end beam

Supporting function: The end beam is connected to the main beam to support the structure of the entire crane and ensure the stability and carrying capacity of the crane.

Guiding function: The end beam is equipped with a wheel frame and wheels to provide guidance for the horizontal movement of the trolley and ensure that the trolley runs smoothly on the main beam.

Connecting function: The end beam connects the main beam to the supporting foundation (track) of the crane to form a complete crane structure.

2) Design parameters

Length and width: The length and width of the end beam are determined according to the design and application requirements of the crane, and are usually matched with the span of the main beam.

Carrying capacity: The carrying capacity of the end beam should match the design of the main beam and the trolley to ensure the safety and stability of the overall structure.

 

4.Crane travelling mechanism

The crane running mechanism of a Crane Bridge And Trolley usually includes the following main components:

1) Motor: Provides power to drive the movement of the crane running mechanism. The power and type of the motor should be selected according to the load and operating requirements of the crane.

2) Reducer: Converts the high-speed rotation of the motor into a low-speed, high-torque output suitable for the movement of the crane. Common types of reducers include gear reducers and worm gear reducers.

3) Wheel: The wheel mounted on the end beam is responsible for rolling on the track. The design of the wheel must ensure its load-bearing capacity and wear resistance.

4) Running track: The guide rail on which the crane moves, usually composed of steel rails, ensures the smooth movement of the crane.

5) Wheel frame: The structure connecting the motor and the wheel, used to support and fix the wheel and ensure its stability.

5.Trolley travelling mechanism

1) Working principle of the trolley running mechanism

Motor start: The operator starts the motor through the control system, and the motor starts to run.

Reduction transmission: The motor transmits power to the wheel axle of the trolley through the reducer, and the reducer reduces the speed and increases the output torque.

Trolley movement: The wheels roll on the guide rails of the main beam, and the trolley moves longitudinally on the main beam to complete the operation of the hook or other equipment.

2) Maintenance and care

Regular inspection: Regularly check the status of the motor, reducer, wheel and wheel frame to ensure that all components are working properly.

Lubrication and maintenance: Regularly lubricate the reducer and wheel bearings to reduce wear and extend service life.

Cleaning and maintenance: Keep the trolley and its running mechanism clean to prevent dust and dirt from affecting the moving parts.

6.Crane wheel

1) Types of wheels

Solid wheels: usually made of strong materials, with high load-bearing capacity, suitable for heavy cranes, and good wear resistance, suitable for use in various environments.

Hollow wheels: relatively light, suitable for small or light cranes, but with relatively low load-bearing capacity.

Wheels with elastic materials: rubber or polyurethane materials are added to the wheel body, with good shock absorption performance, suitable for demanding working environments.

2) Working principle of wheels

Supporting heavy loads: The wheels support the heavy load of the cart or trolley and transfer the weight by contacting the track.

Guided movement: The wheels roll on the track to guide the smooth movement of the trolley or trolley to ensure the normal operation of the crane.

Absorbing shock: During the operation of the crane and the change of load, the wheels can absorb part of the impact force and protect other structures from damage.

7.Crane Hook

1) Working principle of hook

Load-bearing function: The hook is connected to the cargo through a wire rope or chain to carry and lift the object.

Rotation ability: The hook can rotate freely during the lifting process to adapt to the needs of the cargo in different positions and improve work flexibility.

2) Technical parameters

Load-bearing capacity: The load-bearing capacity of the hook usually matches the rated load of the crane, usually ranging from a few hundred kilograms to tens of tons.

Material: Generally high-strength alloy steel or forged steel is used to ensure sufficient strength and durability.

Size: The size and shape of the hook are determined according to the specific application requirements to ensure matching with the object being lifted.

Motor

1) Types of motors

AC motor: the most commonly used type of motor, suitable for most crane applications, with advantages such as simple structure and easy maintenance.

DC motor: used in some special occasions, with good speed regulation performance and starting characteristics, but relatively high maintenance cost.

Variable frequency motor: the speed of the motor is controlled by the inverter to achieve efficient energy management and more precise speed control.

2) Working principle of the motor

Electric energy conversion: the motor is powered by a power supply and converts electrical energy into mechanical energy.

Rotation drive: the current passes through the stator winding to generate a magnetic field, which acts on the rotor, causing the rotor to rotate, thereby driving other components such as reducers, wheels, etc. to move.

.

Sound and light alarm system & limit switch

Sound and light alarm system

1) Function

Warning function: The sound and light alarm system is used to provide warning signals during the operation of the crane to remind the operator and surrounding personnel to pay attention to safety.

Status indication: The working status of the equipment is indicated by sound and light signals, such as the start, stop, failure or overload of the crane.

2) Components

Sound alarm: Usually a buzzer or a horn, which emits a high-decibel alarm to remind the surrounding personnel to pay attention.

Indicator: LED or light bulb is used to emit light signals of different colors (such as red, green, yellow) to indicate different working conditions.

Limit switch

1) Function

Position limit: The limit switch is used to limit the range of motion of each moving mechanism of the crane to ensure that the equipment operates within a safe range.

Protection function: When the crane reaches the set limit position, the limit switch will automatically cut off the power supply.

2) Type

Upper limit switch: used to limit the highest lifting position of the crane to prevent the hook or load from exceeding the safe height.

Lower limit switch: used to limit the lowest lifting position of the crane to prevent the hook or load from falling.

Side limit switch: used to limit the lateral movement of the trolley or car on the main beam to prevent equipment collision.

10.Safety Devices

1) Overload protection device

Function: The overload protection device is used to monitor the load on the hook. When the load exceeds the set rated value, the system will automatically sound an alarm and cut off the power supply to prevent the crane from malfunctioning or causing an accident due to overload.

2) Limit switch

Function: The limit switch is used to limit the range of motion of the crane, prevent the hook from exceeding the safe height or the lowest position, and ensure the stability and safety of the crane.

3) Emergency stop device

Function: The emergency stop device is used to quickly cut off the power supply of the crane in an emergency, immediately stop all movements, and prevent accidents.

4) Safety lock

Function: The safety lock is used to prevent the load from accidentally falling off during transportation when the hook is connected to the load.

5) Anti-collision device

Function: The anti-collision device is used to detect the distance between the crane and other equipment or obstacles during operation to prevent collisions.

Composition: It usually includes ultrasonic sensors or infrared sensors, which can sound an alarm or automatically stop by monitoring the distance in real time.

6) Electrical protection device

Function: The electrical protection device is used to prevent motor overload, short circuit or other electrical failures to ensure the safety of the electrical system.

7) Service brake device

Function: The service brake device is used to control the moving speed of the truck and the trolley to ensure that they can stop quickly when necessary.

11.Control Mode

1. Manual control

Function: The operator directly controls the movement of the crane, such as lifting, lowering and moving, through a manual controller.

Equipment: Usually equipped with manual rockers, buttons or switches.

Advantages: Simple operation, suitable for small operations and occasions with high flexibility requirements.

2. Electric control

Function: The various movement mechanisms of the crane are driven by electric motors, and the operator uses an electric control panel or remote control for control.

Equipment: Generally equipped with an electric control box, a button panel and a remote control.

Advantages: Convenient operation, reduced labor intensity of operators, suitable for long-term operations.

3. Remote control

Function: The operator wirelessly controls the movement of the crane through a remote control, providing greater operational flexibility and safety.

Equipment: Equipped with a wireless remote control and receiver.

Advantages: The operator can control the crane at a safe distance, reducing the danger at work.

4. Automatic control

Function: The crane can be fully automatically or semi-automatically operated through an automatic control system, and can be operated according to a preset program.

Equipment: Equipped with PLC (Programmable Logic Controller), sensors and actuators.

Advantages: Improves the accuracy and efficiency of operations, suitable for large-scale and highly repetitive operations.

5. Centralized control

Function: Multiple cranes are centrally managed in one control center to achieve coordinated operations.

Equipment: Equipped with centralized control system, monitoring equipment and computer control system.

Advantages: Improves the working efficiency of multiple cranes and facilitates management and scheduling.

Sketch

Main technical

 

 

1. Simple structure

Compact design: Crane Bridge And Trolley consist of a main beam, end beams and operating mechanism, with a simple structure, easy to manufacture and maintain.

Easy installation: Compared with double-beam cranes, the installation process of Crane Bridge And Trolley is simpler, reducing installation costs and time.

2. Low cost

Low manufacturing cost: Due to its simple structure and less material use, the manufacturing cost of Crane Bridge And Trolley is lower than that of double-beam cranes.

Low maintenance cost: Fewer parts and simplified design make its daily maintenance cost lower.

3. Strong adaptability

Applicable to various sites:Crane Bridge And Trolley are suitable for many different types of factories, including factories, warehouses, docks, etc. with limited space.

Multiple operating environments: It can operate normally in different environments such as high temperature, humidity, dust, etc., and is suitable for various indoor and outdoor working conditions.

4. Flexible operation

Multiple control methods: Crane Bridge And Trolley can adopt multiple control methods such as manual, electric, remote control, etc. to adapt to different operating needs.

Precise positioning: Due to its light structure and sensitive response,Crane Bridge And Trolley can achieve precise lifting of goods and more flexible operation.

5. High space utilization

Small space occupation: The main beam of a Crane Bridge And Trolley is usually erected on the walls or brackets on both sides of the factory building, which occupies less space and does not hinder ground operations.

High lifting height: The lifting mechanism is usually located below the main beam, which can provide a larger effective lifting height and improve space utilization.

 

 

1. Manufacturing

Processing workshop: Crane Bridge And Trolley are often used in mechanical processing workshops to transport workpieces, equipment and materials, facilitating the processing, assembly and transportation of parts.

Assembly line: In the assembly line, Crane Bridge And Trolley are used to accurately lift and position components to ensure the continuity and efficiency of the production process.

2. Warehousing and logistics

Warehouse:Crane Bridge And Trolley are often used in the warehousing and logistics industry to help transport goods and materials, especially suitable for transporting bulky goods, improving the space utilization and operating efficiency of warehouses.

Freight terminal: In logistics centers and terminals, Crane Bridge And Trolley can quickly load and unload goods, improve the efficiency of cargo loading and unloading, and reduce manual labor intensity.

3. Construction engineering

Prefabricated component handling: In the field of construction engineering, Crane Bridge And Trolley can be used to transport prefabricated concrete components, steel bars and other heavy objects, and are suitable for material handling and installation on construction sites.

Equipment installation: Used for the installation of large equipment on construction sites, such as air-conditioning systems, pipelines, etc., the flexibility of Crane Bridge And Trolley can help operate in limited space.

4. Automobile Manufacturing

Parts Handling: Single-girder bridge cranes are widely used in automobile manufacturing plants to handle and position heavy objects such as engines and body parts, helping the assembly process to be more efficient and precise.

Material Handling in Workshops: In automobile manufacturing workshops, cranes can help move large or bulky parts, reducing the burden of manual operations on the production line.

5. Metallurgical Industry

Steel Handling: In metallurgical plants, single-girder bridge cranes are used to handle materials such as steel plates and steel coils for storage and further processing.

High Temperature Environment: Some specially designed single-girder bridge cranes can work in high temperature environments, which is suitable for the production needs of the metallurgical industry.

 

 

1. Demand Analysis and Design

Customer Demand Determination: Demand analysis is conducted based on the specific needs of the customer (such as lifting capacity, span, lifting height, use site, etc.).

Engineering Design: Crane designers design the main beam, end beam, trolley and other key components according to the needs, including structural design, load calculation, etc. Use CAD software to draw detailed design drawings.

Parameter Confirmation: Design parameters include the load capacity, span, lifting height, operating speed, etc. of the crane to ensure that they meet the customer's requirements and relevant industry standards.

2. Material Procurement

Material Selection: Select suitable materials according to the design plan. Usually, the main beam and end beam of the crane use high-quality low-alloy structural steel, and other parts may use different metals or alloys.

Procurement and Inspection: Purchase necessary raw materials such as steel, motors, gears, bearings, wire ropes, etc., and conduct quality inspection to ensure that all materials meet the requirements.

3. Main Beam and End Beam Manufacturing

Steel Cutting: Cut the purchased steel into the required size and shape according to the design drawings.

Welding and Assembly: The main beam and end beam are welded by automatic welding equipment to ensure welding quality. The main beam usually adopts a box structure or an I-beam structure, and the strength and rigidity are ensured by welding.

Stress relief: The welded main beam and end beam are stress-relieved by heat treatment or mechanical processing to prevent deformation during long-term use.

Surface treatment: The main beam and end beam are sandblasted to remove rust, and then anti-rust paint or other surface coatings are applied to prevent corrosion and improve the appearance quality.

4. Manufacturing of lifting mechanism

Electric hoist assembly: The lifting system of Crane Bridge And Trolley usually uses an electric hoist. The assembly of the hoist includes the installation and commissioning of the motor, reducer, wire rope, hook, etc.

Wire rope and hook installation: Select the appropriate specification of wire rope according to the requirements of lifting capacity. The hook and wire rope are connected by a pulley system to ensure the stability and safety of lifting.

5. Manufacturing of trolley and car running mechanism

Wheel processing: The wheels of the trolley and car are processed by high-precision mechanical equipment to ensure their dimensional accuracy.

Drive system assembly: Install the motor, reducer and drive wheel to ensure that the trolley and car can move smoothly. The driving system of the trolley and the car is powered by an electric motor, and the speed reducer adjusts the speed to ensure smooth operation.

Testing and debugging: Perform preliminary tests on the wheels and drive system to ensure that they operate normally and that the gears and bearings operate smoothly and without noise.

6. Electrical system installation

Electrical component installation: Install control panels, switches, relays, inverters, limit switches and other electrical components to ensure stable operation of the electrical control system.

Wiring: According to the electrical design drawings, the entire crane is wired, including power cables, control cables and signal cables. Ensure that the wiring is neat and safe.

Safety system configuration: Install overload protection devices, limit switches, emergency stop switches and sound and light alarm systems to ensure safe operation of the equipment.

7. Assembly of the whole machine

Component assembly: Assemble the main beam, end beam, trolley and electric hoist as a whole according to the design requirements to ensure close connection and coordinated operation between the components.

Connection test: Check the tightness of each connection point to ensure that all bolts and welding parts meet the standards to prevent loosening or deformation.

8. Debugging and testing

No-load test: First, conduct a no-load operation test to check the movement status of each mechanism of the crane to ensure the normal operation of the electrical system and mechanical components.

Load test: Carry out a load test to test the lifting and moving performance of the crane under the specified load to check its stability and safety.

Overload test: Carry out an overload test as required to check whether the crane can activate the safety protection system under overload conditions, such as overload alarm or automatic power off.