Drive mechanism for a movable plunger

Simple SummaryContent extracted from patent full text and abstract with AI.

This invention describes a compact drive device that converts the rotational movement of an electromagnetic motor (such as BLDC, stepper, or synchronous motor) into a precise linear movement of a tappet or actuator. The core innovation lies in an integrated design where a coaxially arranged screw and nut mechanism inside the stator, coupled with specialized rotation and anti-rotation features, allows for high efficiency and compactness. The setup maximizes usable linear travel while minimizing overall device length, making it a potential replacement for pneumatic or hydraulic actuators in various automation contexts.

Use CasesContent extracted from patent full text and abstract with AI.

• Replacement for pneumatic short-stroke cylinders in industrial automation lines
• Actuators in packaging and sorting machinery
• Linear motion component in woodworking or tool machines
• Electric linear actuators for automotive applications
• High-precision positioning in logistics or conveyor systems
• Integrated part of automated manufacturing or assembly lines

BenefitsContent extracted from patent full text and abstract with AI.

• Compact dimensions with a high travel-to-length ratio, enabling installation in tight spaces
• High force output and dynamic responsiveness suitable for demanding industrial applications
• Lower manufacturing and operational costs compared to traditional linear drives
• Long service life with options for maintenance-free operation via advanced materials
• Flexibility to adjust power transmission without redesigning the motor portion
• Integrated sensor support and optional sensorless control for simplified electronics and monitoring
• Enhanced energy efficiency and reduced electrical requirements due to optimized mechanical design

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention relates to a drive device (V) for producing a translational motion of a movable tappet (8) by means of an electromagnetic rotating machine, comprising at least one rotor (4) and one stator (5), which is arranged coaxial to the rotor (4), having at least one movement-thread pair integrated coaxially in the stator, said movement-thread pair comprising a lead screw (6), which is coupled to the rotor (4) for conjoint rotation, and a threaded nut (7), which is linearly guided in a stator sleeve (2) in a rotationally fixed manner and is rigidly coupled to the tappet (8), the rotor (4) being guided for rotation around the stator (5), a torque being transferred from the rotor (4) to the lead screw (8) by means of a thin-walled flange (10), a rotational fixation (11) of the threaded nut (7) in the cavity of the stator sleeve (2) being provided as a result of interlocking joining of the two.