The hoist serves as the power core of an electric suspended platform, while the safety lock acts as the lifeline for fall protection at height. The selection of these two components directly determines equipment safety, service life and compliance with construction site acceptance standards. Many purchasers prioritize low prices and opt for non-standard universal spare parts, which can easily lead to fatal hazards such as platform sliding, rope slipping and brake failure.
With 38 years of experience manufacturing electric suspended platforms and participation in drafting national standards, Shenxi Group breaks down standardized selection criteria for these two core components based on national code requirements and practical experience across various working conditions. It also elaborates on the differentiated advantages of self-developed original parts, providing clear selection guidelines for leasing and construction enterprises.
I. Four Key Criteria for Standardized Selection of Electric Suspended Platform Hoists
- Match the model based on the platform’s rated load capacity Standard ZLP630 suspended platforms are fitted with original LTD63 hoists. Extended heavy-duty platforms require high-torque models with braking torque at least 1.5 times the rated torque to prevent sliding and power slippage under heavy loads. Never pair small-sized hoists with extended platform baskets, as long-term eccentric loading will accelerate gear wear.
- Prioritize fully enclosed worm and worm gear transmission structures Discard simple open gear models. Fully enclosed housings offer dustproof and waterproof performance suitable for construction sites exposed to dust and rainwater. Hoists must be equipped with both electromagnetic power-off holding brakes and manual emergency lowering devices to enable steady evacuation of personnel in sudden power outages and avoid trapping workers at height.
- Inspect material quality and durability Gears shall be made of 40Cr nitrided alloy steel for superior wear resistance. Each hoist undergoes 100,000-cycle durability testing with minimal synchronization error between dual motors, ensuring level lifting without tilting or asynchronous movement. Hot-dip galvanized housing anti-corrosion versions are available for coastal and shipyard environments to slow rusting and oil leakage.
- Adhere to original factory matching for the complete set; reject miscellaneous assembled parts Off-the-shelf generic hoists feature mismatched rope sheaves and installation dimensions, which frequently cause rope jamming and accelerated steel wire rope abrasion. Using non-original parts also voids the full-machine warranty and results in failure during safety supervision inspections.
II. Core Standardized Selection Requirements for Fall-Arrest Safety Locks
- Select lock types corresponding to platform configurations Double-point standard suspended platforms adopt tilt-triggered swing-arm safety locks that instantly clamp ropes when the platform tilts 3° to 8°. Small single-point suspended platforms use centrifugal-triggered safety locks. Dual safety locks with redundant dual protection are recommended for high-risk special platforms used in wind power and shipbuilding industries.
- Verify rope-clamping performance and test qualifications National standards stipulate the rope clamping distance shall not exceed 200 mm. Locks cannot reset automatically after clamping; faults must be manually inspected before unlocking. Every safety lock comes with an independent test report and supports mandatory annual calibration. Low-quality locks from unqualified small manufacturers suffer insufficient sensitivity and may fail completely when a wire rope breaks.
- Prioritize corrosion-resistant lock cylinder materials Stainless steel alloy lock cylinders are preferred for impact resistance and rust prevention, avoiding jamming in high-salt marine environments. Products must pass professional 100-cycle impact fatigue testing to maintain stable performance without failure under strong winds and bumpy working conditions.
- Must be used with original factory matched steel wire ropes Safety locks and steel wire ropes are calibrated as a matched set. Mixing non-standard steel wire ropes will result in slipping between the lock and rope, completely eliminating fall protection functionality.
III. Core Advantages of Shenxi Self-Developed Hoists and Safety Locks
Hoist Advantages
Shenxi’s third-generation LTD series features independent patents. Its nitrided heat-treated gears deliver far longer wear resistance than ordinary models. High-precision processing via imported machining centers limits dual-motor synchronization error within 3‰, enabling smooth lifting without swaying. The IP54 waterproof housing prevents short circuits and oil leakage on rainy days, with power-off instantaneous braking distance below national standard limits. All hoists are co-developed and matched with complete platforms, subjected to 125% overload durability testing before delivery, with full test data archived for each unit.
Safety Lock Advantages
The self-developed LSB swing-arm safety locks adopt imported stainless steel lock cylinders. Shenxi is the first domestic manufacturer to pass 100-cycle impact resistance testing. The locks trigger rope clamping rapidly at a 3° tilt with uniform rope clamping free of slippage. Custom models for wind power and shipbuilding are fitted with dual safety locks and dual safety ropes for redundant multi-layer protection against falls. Each safety lock is supplied with an independent test certificate, and the group provides technical guidance for annual calibration to resolve clients’ lock calibration challenges.
IV. Full-Cycle Supporting Services to Sustain Long-Term Component Safety
Shenxi only supplies fully matched original factory hoists and safety locks and does not sell separate non-standard generic spare parts. Upon equipment delivery, practical operation training is provided to teach staff hoist lubrication maintenance and routine safety lock self-inspection procedures. Nationwide after-sales service outlets offer 24-hour response, with long-term stock of original spare parts for supply. After maintenance and replacement, full-platform load retesting is performed to guarantee component performance compliance.
Customized matching schemes combining hoists and safety locks are provided via one-on-one on-site working condition surveys, taking into account building height, corrosive environments and construction load requirements. This eliminates potential high-altitude safety hazards at the source of equipment selection.
