In depth analysis of the working principle of electric push rod
Electric push rod, as the core executive component of industrial automation, achieves precise control through the conversion of electric energy linear motion. This article analyzes from four dimensions: structural principles, control technology, performance adaptation, and industry applications, providing technical guidance for equipment selection.
Mechanical Structure and Energy Conversion Mechanism
Composed of a motor, reduction device, transmission mechanism, and housing, the high-speed rotation of the motor is converted into low-speed high torque output through a gear/worm gear reducer. The trapezoidal screw or ball screw converts rotational motion into linear displacement, achieving zero leakage and low-noise operation. The coaxiality of the deceleration device should be controlled within Φ 0.05mm, and the ball screw should be regularly lubricated with molybdenum disulfide grease to avoid carbonization and peeling.
Implementation path of precision control technology
Adopting a closed-loop feedback system with built-in encoder/potentiometer to achieve ± 0.02mm repeat positioning accuracy, supporting industrial bus protocols such as Modbus and EtherCAT. Actual testing shows that the Profinet IRT protocol achieves a 4-axis synchronization error of less than 0.05mm within a 125 μ s cycle, which is 37% more efficient than traditional pulse control. The high-speed model can operate at a speed of up to 2m/s and is suitable for high-frequency reciprocating scenarios.
Performance parameters and scenario adaptation strategies
Technical parameters include: 1) thrust range of 50N35 tons; 2) Speed 0-2m/s; 3) Travel distance 5mm to 2500mm; 4) IP67 protection level. Multi parameter collaborative selection case: When the logistics sorting system adopts a dual push rod scheme, it is necessary to configure guide rail slider compensation. The medical bed system recommends the three-dimensional matching method of load speed and stroke. For loads above 5000N, ball screw models with temperature compensation are preferred.
Technical comparison and application advantages
Compared to servo electric cylinders, ordinary electric push rods are more cost-effective, with servo models achieving a positioning accuracy of 0.01mm. Compared to hydraulic systems, the mechanical efficiency has been improved by 50%, with significant maintenance free features and support for wide temperature operation from 20 ℃ to 70 ℃. Replacing cylinders with automated production lines can increase cycle time by 30%, optimize space, achieve 0.1mm level fine-tuning in the medical field, and achieve ± 1.5 ° non rotational accuracy for industrial robot joint drive units.
Industry Applications and Technological Evolution
Widely used in fields such as material sorting, bed adjustment, and robotic arm drive. In the future, self diagnostic functions and advanced sensors will be integrated to become the core execution unit of flexible manufacturing systems. Selection requires a comprehensive evaluation of load characteristics, control requirements, and environmental conditions to balance equipment performance and cost.
Shanghai Basang Electric Co., Ltd. is a professional cabinet/crate/linear actuator manufacturer integrating R&D, production and sales, mainly producing electrical control cabinet, distribution cabinet, control box, distribution box, cantilever system, junction box, console and handle; The company has advanced equipment and abundant human and technical resources, and its products cover automobile, photovoltaic, solar energy, nuclear power, logistics, food, pharmacy and automation
Main products:
electrical cabinet control cabinet, power distribution cabinet, power distribution box, ， Command panels，，Electrical Panel Enclosure/Control box，Enclosure Systems，Support arm systems，Enclosures/Power distribution，Linear actuator ，Cable Drag Chain Open，Rail and slide telescopic cover，protective shield