Pneumatic annular actuator

• Main Authors: EWER FRED L, CLOHESSY KIP E, BAKER EVAN R, SCRIVENS O. LANCE, PUGLIESE SCOTT J, GIACOMINI THOMAS W
• Format: Patent
• Language: English; Spanish
• Published: 01.12.2003
• Edition: 7
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; BRAKES; CLUTCHES; COUPLINGS FOR TRANSMITTING ROTATION; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; ENGINEERING ELEMENTS AND UNITS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

An annular actuator for moving a member axially to couple and un couple a drive member with a driven member of a vehicle drive train. The actuator encircles the drive and driven member. The actuator has a housing to which a diaphragm is mounted. A spring biases the diaphragm to move in one axial direction and withdrawal of air forces the diaphragm to move in the opposite axial direction. A shifting fork coupled to the diaphragm moves a clutch ring in the one axial direction to be coupled with only one of the drive and driven members and is coupled with both the drive and driven members when moved in the opposite direction. The actuator defines a sealed chamber that is totally non-rotatable with relative movement occurring between the shifting fork and the clutch ring. Accionador anular neumático para desplazar un miembro axialmente, acoplar y desacoplar entre sí un miembro conductor y un miembro conducido de un tren de transmisión de un vehículo. El accionador circunda el miembro conductor y el conducido. Dicho accionador tiene un alojamiento en el que está montado un diafragma. Un resorte empuja el diafragma para desplazarlo en una dirección axial, y la retirada de aire obliga al diafragma a desplazarse en la dirección axial opuesta. Una horquilla de cambio acoplada al diafragma mueve el anillo de embrague en la dirección axial para su acoplamiento a sólo uno de los miembros conductor y conducido, y se acopla a ambos miembros conductor y conducido cuando se desplaza en la dirección opuesta. El accionador define una cámara obturada que es totalmente no giratoria con respecto al movimiento que se produce entre la horquilla de cambio y el anillo de embrague.