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Views: 2 Author: Site Editor Publish Time: 2025-09-17 Origin: Site
Lead screw core is used for low speed, low load, and low positioning accuracy requirements of linear transmission scenarios. With the characteristics of simple structure, low cost and good self-locking, it is widely used in the field of non-high precision transmission.
1. Core use cases
Industry areas | Typical application scenarios | Select core reasons |
General automation | Small lifting platform, electric slide table, conveyor belt tensioning mechanism | Low load requirement (usually <5kN), no need to run at high speed, self-locking can prevent accidental sliding
|
Medical apparatus and instruments | Bed lifting/tilting mechanism, dental chair adjustment, rehabilitation equipment push rod | Slow running speed (<0.5m/s), high safety (self-locking) requirements, cost sensitive
|
Home furnishing and home appliances | Electric sofa back adjustment, lift table/bar, smart toilet seat push rod | The load of home scenarios is minimal, requiring a low-cost solution and self-locking to avoid moving after power failure
|
Motor-dom | Manual/ electric seat adjustment (for some low-end models), trunk support rod | The space inside the car is limited, and the lead screw structure is compact to meet the requirements of light load adjustment
|
Construction machinery | Small agricultural machinery (such as height adjustment of seeders), manual hydraulic pump handle transmission | Outdoor scenarios have low accuracy requirements, can tolerate dust and other harsh environments, and simple maintenance
|
2. Specific application cases
2.1. Medical Bed
The bed's back elevation and leg adjustment functions are independently controlled by 2-4 sets of lead screw mechanisms. With an extremely slow operating speed (approximately 0.1m/s) and a safety feature to prevent falls during power outages, this design ensures patient safety. The self-locking mechanism of the lead screws plays a crucial role, while their simple structure reduces maintenance complexity.
2.2.The small lifting platform for warehousing/workshop
It is used to lift goods under 500kg. The lead screw rod is used with the speed reduction motor, and no additional braking device is required. The platform position can be kept by the screw rod self-locking, which can meet the needs of low frequency and low precision lifting, and the cost is far lower than the combination of ball screw rod and braking motor.
2.3.Manual adjustment of experimental equipment slides.
The optical platform and sample stage in the laboratory are partially adjusted using a manual structure combining "handle + lead screw rod". The screw rod features a small thread pitch (e.g., 2mm), enabling precise fine-tuning. Its self-locking mechanism ensures stable positioning after adjustment, preventing platform displacement during experiments.
3. Not applicable scenarios
It is essential to recognize the limitations of lead screws and avoid misuse:
3.1. High-speed transmission scenarios: lead screws exhibit significant friction, leading to overheating, accelerated wear, and short lifespan during high-speed operation.
3.2. High-precision positioning scenarios: These systems feature large transmission clearance, with positioning errors typically exceeding 0.1~0.5mm, failing to meet micron-level precision requirements (such applications require ball screws).
3.3. Heavy-load scenarios: The screws are prone to deformation and wear, necessitating bulky structural components that ultimately prove less efficient than gear-rack systems or hydraulic transmission.
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