Tubular linear motor, also known as pen linear motor, is a low-power micro push rod lifting (telescopic) motor, which belongs to a type of cylindrical linear motor. The following is a detailed analysis of tubular linear motors:
1、 Structural composition
The main transmission structure of a tubular linear motor is assembled from components such as a drive motor (motor), gearbox (reduction gear), nut, guide sleeve, inner tube, outer tube, pull head, micro control switch, etc. This structure makes the tubular linear motor compact and efficient.
2、 Working principle
Tubular linear motors use electromagnetic principles to generate force and motion. It consists of a hollow metal tube and a magnetic block passing through the pipeline. There is a set of windings on the magnetic block that generate a magnetic field when powered on. When current passes through the winding, the magnetic field will cause the interaction force between the magnetic block and the metal tube, thereby causing the magnetic block to move inside the pipeline. By adjusting the direction and magnitude of the current, the position and velocity of the magnetic block inside the pipeline can be controlled. When the current changes direction, the movement direction of the magnetic block will also change, thereby achieving the back and forth movement of the magnetic block in the pipeline.
3、 Characteristics and advantages
Simple structure: The tubular linear motor does not require an intermediate conversion mechanism to directly generate linear motion, greatly simplifying the structure and improving the reduction of motion inertia, dynamic response performance, and positioning accuracy.
Suitable for high-speed linear motion: Due to the absence of centrifugal force constraints, tubular linear motors can achieve high speeds without mechanical contact during motion, resulting in no friction or noise, and no wear on transmission components, which can improve overall efficiency.
Easy regulation and control: By adjusting voltage or frequency, or replacing secondary materials, different speeds and electromagnetic thrust can be obtained, suitable for low-speed reciprocating operation scenarios.
Strong adaptability: The primary iron core of a linear motor can be sealed as a whole with epoxy resin, which has good anti-corrosion and moisture-proof properties, making it easy to use in humid, dusty, and harmful gas environments.
High precision and high speed: Tubular linear motors can achieve high-speed and high-precision motion control, suitable for applications that require high precision and speed.
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