Switchable Coupling

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

This invention describes a switchable mechanical coupling (clutch) system that connects or disconnects a driving element (input, e.g., pulley) and an output element (e.g., shaft). The coupling uses an actuator (preferably electromagnetic) and an elastic element to actuate a switching element with variable positioning for open and closed states. Unique to this design is a stepwise rotational locking mechanism (bolt and detent system) that allows the coupling to be held in either the open or closed position without continuous energy input, needing energy only during the switching operation. The invention details how precise relative movement and latching maintain state without additional actuators or energy.

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

• Automotive systems, such as controllable air conditioning compressor clutches, to engage/disengage accessories only when needed (reduce fuel consumption).
• Industrial machine drives, where intermittent operation or selective engagement of driven parts is required (e.g., conveyor sections, pumps, or tools).
• Robotics, for selective power transmission to different axes or subsystems.
• Electric vehicles or hybrid drivetrains to facilitate seamless and energy-efficient mode changes or disconnects.
• Agricultural machinery, allowing automated or remotely controlled power take-off (PTO) engagement.
• Any system requiring an energy-efficient, remotely controlled mechanical connection/disconnection mechanism.

BenefitsContent extracted from patent full text and abstract with AI.

• Maintains coupling state (open/closed) without consuming energy—energy is only needed for actuation, not during operation, improving efficiency.
• Reduces electrical power consumption, important for automotive and battery-powered applications.
• No need for continuous electromagnetic actuation reduces wear and system heat.
• Simplified mechanical design without the need for multiple actuators or extra holding mechanisms; fewer parts mean increased reliability and reduced costs.
• Minimizes space needed and complexity, supporting more compact or integrated device designs.
• Prevents accidental disengagement or switching caused by vibrations, thanks to the secure locking/latching mechanism.

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

A switchable coupling (1) with a coupling system (4) between a driving element (2) and an output element (3), wherein the switchable coupling (1) has a preferably electromagnetic actuator (5) and a switching element (6) in the operative vicinity of the actuator (5), and at least one elastic actuating element (10) arranged between the output element (3) and the switching element (6). The switching element (6) is movable in an infinitely variable manner between a starting position (7) via a central position (8) as far as an end position (9), wherein, in the central position (8) of the switching element (6), the switchable coupling (1) has a different state (open or closed) than in the starting position (7). The switchable coupling (1) also has a bolt (11) which is fixedly positioned in the axial direction within the switchable coupling (1) by means of a first bolt stop (12) and a second bolt stop (13). By means of the axial movement of the switching element (6) to and fro upon activation and deactivation of the actuator (5), operative surfaces (24 and 28) of a rotational system (23) connected to the switching element (6) or the bolt (11) come into engagement with moulded elements (26, 27, 30, 31) on the switching element (6) and on the bolt (11) in such a manner that the bolt (11) is rotated in a stepwise manner in relation to the switching element (6). As a result, the bolt alternately moves relative to the switching element into a first relative position (16), in which the bolt blocks a movement of the switching element (6) in the central position (8), and into a second relative position (18), in which said bolt permits a movement of the switching element (6) as far as the starting position.