Bridge cranes (also known as traveling cranes and overhead cranes) are commonly used lifting equipment in factories, warehouses, workshops and other places. They have a wide variety of accessories, mainly involving multiple systems such as mechanical, electrical, and safety. The following is a classification and function introduction of the main accessories of bridge cranes:
I. Main mechanical parts
1. Lifting mechanism accessories
Wire rope: used for lifting and lowering of hooks, and wear and wire breakage should be checked regularly.
Hook group: including hooks, pulleys, bearings, etc., divided into single hooks, double hooks, rotating hooks and other types.
Pulley group: used to change the direction of wire ropes and reduce friction.
Drum: winding wire ropes to drive lifting and lowering.
Brakes (such as disc brakes and drum brakes): ensure that the lifting mechanism stops safely.
2. Cart/trolley running mechanism accessories
Wheel group: supports the crane to run on the track, and wear should be checked regularly.
Track (such as QU type and P type rail): the basic track for the operation of the crane.
Coupling: connects the motor and the reducer to transmit power.
Reducer: Reduce motor speed and increase torque.
Buffer (rubber or hydraulic): Prevent the trolley/cart from hitting the end of the track.
2. Electrical control system accessories
1. Drive and control
Motor (hoisting motor, running motor): Provide power.
Inverter: Adjust motor speed to achieve smooth lifting.
Control cabinet: Contains control components such as contactors, relays, PLC, etc.
Resistor box (for winding motor): Speed regulation and current limiting.
2. Operation and signal
Remote control (wireless or wired): Remote control of the crane.
Operation room (driver's room): Operator console.
Limit switch (hoisting limit, travel limit): Prevent over-limit operation.
Sound and light alarm: Alert the crane's operating status.
3. Safety protection device
Overload limiter: Prevent overload operation.
Anti-collision device (laser or ultrasonic): Multiple cranes prevent collision.
Emergency stop button: Immediate shutdown in case of emergency.
Windproof device (such as rail clamp, anchor device): prevent the crane from sliding in windy weather.
Wire rope anti-slip groove device: prevent the wire rope from slipping off the pulley.
IV. Auxiliary accessories
Lubrication system (automatic or manual): lubricate gears, bearings, etc.
Ladder, platform, guardrail: easy to inspect and maintain.
Lighting: lighting for working at night or in dim environment.
Cable pulley: mobile support for power supply cable.
V. Consumable parts (need to be replaced regularly)
Wire rope (wear and broken wire need to be replaced)
Brake pad (friction pad needs to be replaced after wear)
Wheel (track needs to be repaired or replaced after wear)
Bearing (poor lubrication and easy to damage)
Carbon brush (motor carbon brush needs to be replaced due to wear)
Purchase and maintenance suggestions
Matching model: ensure that the accessories are compatible with the crane (such as LD type, QD type, double beam, single beam).
Quality certification: choose products that meet GB/T 3811 (crane design specification) or ISO standards.
Regular inspection: Focus on key components such as wire ropes, brakes, and limit switches.
Professional maintenance: It is recommended that operation and maintenance be performed by certified personnel to avoid safety hazards.
