Scissor lift is one of the most common aerial work equipment. It is widely used in industrial and commercial fields due to its stable structure, simple operation and wide applicability. The following is a detailed introduction from the aspects of structure, working principle, classification, application scenarios, advantages and disadvantages:
1. Structure and Composition
A. The Scissor Mechanism
It consists of multiple sets of cross-connected metal arms (scissor arms), which are driven by hydraulic cylinders to extend and retract to achieve vertical lifting of the platform.
The intersection of the scissor arms is connected by hinges, and it expands or contracts in an "X" shape when lifting.
B. Working Platform
Located at the top of the scissor mechanism, it is used to carry workers and tools, and is usually equipped with safety facilities such as guardrails, safety doors, and emergency descent devices.
The platform has various sizes (commonly 1.5m×3m to 2m×6m), and the load capacity is generally 200-500 kg.
C. Chassis and Drive System
· Electric type: battery-driven, quiet and environmentally friendly, suitable for indoor use.
· Diesel type: fuel-driven, powerful, suitable for outdoor rugged terrain.
· Hybrid type: combines the advantages of electricity and diesel to adapt to complex environments.
D. Hydraulic System
Power is provided by hydraulic pumps and hydraulic cylinders to control the lifting and lowering of the scissor arms.
Equipped with safety valves and balance valves to prevent accidental descent or overload.
E. Control System
The operator panel is usually located in the platform or on the chassis, supporting manual push buttons or remote control operation.
Modern models may be equipped with smart sensors, tilt alarms, automatic leveling, etc.
2. Working Principle
A. Lifting Process
The hydraulic pump presses the hydraulic oil into the hydraulic cylinder, pushing the piston rod out, increasing the cross angle of the scissor arms, and the platform rises vertically.
When descending, the hydraulic valve releases the pressure, the hydraulic oil flows back, the scissor arms shrink, and the platform descends smoothly.
B. Stability Control
The chassis is equipped with outriggers or a balancing system to ensure that the platform does not tilt during the lifting process.
Some models have an automatic leveling function to adapt to slightly uneven ground.
3. Classification and sub-types
A. By power source
· Electric Scissor Lift: zero emission, low noise, suitable for indoor environments such as warehouses and workshops.
· Diesel Scissor Lift: strong power, long endurance, suitable for outdoor construction sites or rough ground.
· Hybrid Power: taking into account both environmental protection and power, suitable for indoor and outdoor switching scenes.
B. By movement mode
· Self-propelled: equipped with drive wheels and steering system, can move autonomously.
· Hand-push: no power drive, requires human push, suitable for light operations.
C. By chassis design
· Wheel scissor lift platform: rubber tires, suitable for flat ground.
· Crawler scissor lift platform: crawler chassis, suitable for soft terrain such as mud and sand.
4. Application scenarios
A. Indoor scenarios
Warehouse shelf access, workshop equipment installation, shopping mall ceiling maintenance, exhibition center exhibition, etc.
Electric scissor type is the first choice because of its quietness and pollution-free.
B. Construction site
Exterior wall painting, steel structure installation, concrete pouring auxiliary operations.
Diesel scissor lift is suitable for complex outdoor terrain.
C. Municipal engineering
Street light maintenance, bridge inspection, landscaping pruning, etc.
D. Special industries
Film and television shooting (lighting installation), airport cabin maintenance, power equipment maintenance, etc.
Scissor-type aerial work platform has become one of the mainstream equipment for aerial work due to its high cost performance and reliability, but when choosing, it is necessary to match the model according to specific needs and strictly abide by safety regulations.
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