How to Reduce Shaking of Self-Propelled Scissor Lifts

1. Structural Optimization During Production (Fundamental Solution to Minimize Shaking)

(1) Scissor Arms & Hinge Joints (Main Source of Lateral Shaking)

Control the clearance between pin shafts and bushings within 0.2mm. Equip with copper bushings and high-temperature grease. Use quenched & tempered pin shafts with matched grinding to eliminate loose play.

Adopt Q345 high-strength steel for scissor main beams, add side reinforcing ribs and cross tie rods between multi-layer scissor arms to boost lateral rigidity and restrain side sway.

Ensure consistent length and hole dimension of both-side scissor arms via positioning welding fixtures to avoid torsion and uneven stress caused by dimensional deviation.

Reinforce connecting seats of platform and chassis with thickened plates and triangular stiffeners to prevent displacement from welding deformation.

(2) Chassis & Support System for Stable Ground Contact

Widen wheel track and wheelbase for better anti-sway and anti-tipping performance. Models with outriggers are equipped with extendable wide outriggers to maximize supporting span for leveling on slightly uneven ground.

Solid rubber tires are recommended instead of pneumatic tires to reduce bumping. Integral welded chassis replaces thin spliced plates; four-wheel synchronous braking avoids impact jitter from single-side braking.

Equip automatic tilt leveling system: alarm when ground gradient exceeds 1.5°, independently adjustable outriggers for full horizontal chassis to eliminate sway caused by unbalanced load. Maximum allowable working gradient: 3°.

(3) Hydraulic System Shock Absorption to Eliminate Lifting Impact

Install flow divider synchronizing valves and double-acting counterbalance valves for dual cylinders to keep synchronous lifting stroke and prevent pulling torsion. Hydraulic locks on cylinders stop rebound shaking after lifting stops.

Add buffer throttles at lifting top & bottom ends to slow down startup & stop impact; lower lifting speed to reduce oil pressure shock. Energy accumulators on power units absorb hydraulic pressure pulsation.

Adopt wear-resistant PU cylinder seals to avoid internal leakage, which would cause platform sinking and reciprocating sway.

(4) Platform & Guardrail Reinforcement

Thicken platform floor plates and install horizontal pull rods on guardrails. Reduce hollow areas to lower wind resistance sway when working at height.

2. On-site Inspection & Adjustment for Existing Lifts

Replace worn pin shafts and copper bushings (the top cause of excessive shaking after long-term use) and fill joints with lubricating grease.

Retighten all hinge bolts regularly; loose fasteners will enlarge joint clearance continuously.

Calibrate or replace twisted scissor arms deformed by collision or overloading, as distorted structures lead to severe side swing during lifting.

Clean and adjust synchronizing & counterbalance valves to soften lifting impact; refill hydraulic oil to standard level (air cavitation from insufficient oil causes jitter).

Keep consistent tire pressure; fully extend all outriggers with steel plates or wooden blocks under feet to avoid single-side suspension.

3. Standard Operation Rules to Avoid Man-made & Environmental Shaking

Only operate on solid, flat hardened ground. Do not lift on gravel, pits, soft soil or slopes over 3°. Uneven ground triggers constant bumping and sway.

Forbid high-speed travel, sharp turns and emergency stops when the platform is raised; switch to turtle low-speed mode for elevated travelling.

Operate lifting lever gently, pause for 3 seconds after reaching target height before working. Avoid running or concentrated heavy loads on one side of the platform to prevent gravity offset sway.

Stop high-altitude operation when wind force exceeds Grade 6 (12.5m/s). Remove large wind-catching materials such as large boards and tarpaulins from the platform.

Operate within rated load capacity; centralize goods evenly. Overloading will cause permanent plastic deformation of scissor arms and persistent shaking.

4. Premium Anti-sway Optional Configurations

Soft start & soft stop electric walking control: slow acceleration and braking to eliminate walking impact vibration.

Middle cross stabilizer tie rods for multi-stage scissor lifts to limit lateral swing.

Double hydraulic locking cylinders to lock platform position and eliminate cylinder rebound shaking.

Pothole protection structure: automatically lock lifting function when chassis sinks to one side over pits.

Core Optimization Priority Summary

Tight pin shaft clearance & reinforced scissor lateral rigidity (most effective measure)

Synchronized hydraulic system with counterbalance buffer valves

Wide chassis & full-contact leveling outriggers

Standardized operation: flat ground, low travel speed, low wind, centered load