300x400mm Single Motor Double Scissors Lift Frame

300 × 400 mm Single Motor Double Scissor Lift Frame

The 300 × 400 mm Single Motor Double Scissor Lift Frame is a compact lifting structure designed for applications that require greater vertical travel while maintaining a relatively small installation footprint. It can be integrated into work platforms, material handling equipment, inspection systems, industrial machinery, and customized lifting equipment.

Compared with a single-stage scissor mechanism, the double-scissor configuration uses two connected scissor stages to achieve greater lifting height within a limited horizontal space. A single motor provides the lifting power, simplifying the drive system and reducing the number of major power components.

Structural Design

The main structure typically consists of two scissor stages, lifting arms, pivot joints, mounting brackets, drive components, and a supporting platform.

The double-scissor mechanism extends through the coordinated movement of multiple crossing arms. As the mechanism opens, the platform rises vertically. The geometry of the arms, pivot positions, and mounting points determines the lifting stroke, stability, and overall mechanical efficiency.

The 300 × 400 mm specification generally describes the frame or installation dimensions. The actual lifting capacity and maximum height should always be confirmed from the manufacturer's engineering drawing, as these values depend on the specific design.

Single Motor Drive System

A single electric motor supplies power to the lifting mechanism. Depending on the configuration, the motor may operate a screw drive, hydraulic system, gear transmission, or another mechanical lifting arrangement.

Motor selection should consider rated load, lifting height, lifting speed, duty cycle, and frequency of operation. Correct sizing helps prevent motor overheating and ensures stable movement during repeated lifting cycles.

The transmission system should also provide controlled starting and stopping to minimize shock loads on the scissor structure.

Double Scissor Mechanism

The double-stage structure increases the available lifting range while maintaining a compact base area. However, additional pivot points and moving components require accurate manufacturing and assembly.

Precise pivot alignment is critical for smooth operation. Excessive clearance, uneven arm dimensions, or poor alignment may increase friction, vibration, and component wear.

Bushings or bearings can be installed at pivot points to improve movement and service life. Regular inspection and appropriate lubrication should be included in the maintenance program where applicable.

Manufacturing Process

Production generally includes steel cutting, bending, drilling, welding, machining, surface treatment, and final assembly.

Welding accuracy and dimensional consistency are particularly important because structural deviations can affect the alignment of both scissor stages.

After assembly, manufacturers should inspect pivot movement, drive operation, structural alignment, fastening condition, and lifting performance. Load and functional testing should be performed according to the final equipment design and applicable safety requirements.

Application and Selection Considerations

Before selecting a 300 × 400 mm double scissor lift frame, buyers should confirm rated load capacity, minimum and maximum platform height, motor power, lifting speed, stroke, platform dimensions, and duty cycle.

The actual working load should remain within the manufacturer's specified capacity. For OEM applications, the complete lifting system should be evaluated rather than selecting the frame based solely on its external dimensions.

Conclusion

The 300 × 400 mm Single Motor Double Scissor Lift Frame provides a compact solution for applications requiring increased vertical lifting capability. A rigid double-scissor structure, correctly sized drive system, accurate pivot assembly, and strict quality control are essential for reliable operation.

For customized projects, the frame should be engineered according to the required load, lifting stroke, speed, installation space, and operating environment.

References

1. ISO 12100 – Safety of Machinery: Risk Assessment and Risk Reduction

2. ISO 13849-1 – Safety-Related Parts of Control Systems

3. ANSI/SAIA A92 Series – Mobile Elevating Work Platform Safety Standards

4. ISO 9001 – Quality Management Systems and Manufacturing Quality Control