Application of Hollow-Shaft Servo Electric Cylinders in Automotive Testing: High-Efficiency and High-
Precision Power Source Hollow-shaft servo electric cylinders, with their direct-drive design, compact
structure, and high-precision control, demonstrate significant advantages in the field of automotive
testing.
By directly driving the lead screw with a servo motor, eliminating traditional transmission components,
it not only improves response speed and positioning accuracy but also significantly reduces the failure
rate, making it particularly suitable for space-constrained testing environments.
The following details its key role in automotive testing from three aspects: core advantages, application
scenarios, and practical cases.
I. Core Advantages:
High Precision and Strong Adaptability The core competitiveness of hollow-shaft servo electric cylinders
lies in their excellent performance indicators.
Repeatable positioning accuracy can reach ±0.01mm, ensuring the reliability of test data;
Speed range covers 0.1–2m/s, adapting to the needs of both low-speed fine operations and high-speed
dynamic testing;
Thrust range from 10kg to 35T, meeting different load conditions;
A maximum stroke of 2500mm supports large-range motion simulation.
The housing is made of aluminum alloy, which is lightweight and corrosion-resistant, and the telescopic
rod is made of high-alloy steel, with a protection rating of IP66, enabling long-term stable operation in
harsh environments.
These characteristics make it an ideal choice in automotive testing, especially in applications requiring
rapid start-stop and high-precision positioning, such as fatigue testing and collision simulation.
II. Application Scenarios:
Multi-Dimensional Testing Needs In automotive testing, hollow-shaft servo electric cylinders are widely
used in multiple key stages, covering the entire process from components to complete vehicles:
High and Low Temperature Environmental Testing: Under extreme temperature conditions (such as -
40℃ to +70℃), the electric cylinder can operate stably, simulating the performance of automotive
components in cold or hot climates, ensuring their durability and reliability.
For example, in winter testing, the electric cylinder drives sensors or actuators to accurately record
deformation data of materials at low temperatures.
Durability Testing: Through high-frequency cyclic motion, the electric cylinder simulates vibrations and
impacts during long-term vehicle use, verifying the lifespan of components such as suspension systems
or engine mounts. Its high response speed (millisecond level) and low maintenance requirements
significantly improve testing efficiency. Collision Simulation and Safety Testing: In collision tests, electric
cylinders control dummies or sensors to simulate impact scenarios with precise force and speed,
ensuring the accurate triggering of safety systems (such as airbags).
For example, in frontal collision tests, electric cylinders propel the test trolley to achieve repeatable
impact conditions.
Performance Verification: Used to evaluate vehicle dynamic characteristics such as acceleration, braking,
and steering response. Electric cylinders control complex motion trajectories through programming,
simulating real driving scenarios and helping engineers optimize vehicle handling.
III. Practical Cases:
Improving Test Efficiency and Quality: A certain automobile manufacturer introduced a cluster of servo
electric cylinders in its welding line testing, significantly improving production efficiency and product
quality. Traditional testing systems suffered from multi-robot coordination delays and lengthy model
switching times.
By integrating 152 electric cylinders and using PROFINET bus technology, millisecond-level synchronous
control was achieved:
Welding gun action synchronization error was less than 20ms, and the welding spot pass rate increased
to 98.5%;
Model switching time was reduced from minutes to 8 seconds.
In addition, the energy management characteristics of the electric cylinders (consuming energy only
when needed) reduced testing costs, resulting in significant energy savings compared to traditional
pneumatic systems.
Another case occurred in the field of new energy battery testing.
Electric cylinders are used in the closed-loop die head of coating machines in electrode manufacturing,
correcting coating thickness fluctuations in real time to ensure battery performance consistency.
Their high-precision force and position control (such as constant force pressing of 2000N±5%) avoids
damage to the battery cells, increasing the yield rate to 99.3% while reducing energy waste.
IV. Future Trends and Challenges: With the advancement of Industry 4.0, servo electric cylinders are
developing towards intelligence, such as integration with the Internet of Things (IoT) and artificial
intelligence (AI), to achieve predictive maintenance and adaptive control.
However, challenges remain: in ultra-heavy load scenarios (such as over 30 tons), power density needs
further improvement; the cost of retrofitting small and medium-sized test lines is high, resulting in a
longer return on investment period.
In the future, through material innovation and algorithm optimization, electric cylinders are expected to
replace traditional hydraulic systems in more automotive testing scenarios, becoming a core component
for green and efficient execution.
