Actuating cylinder for vehicle gearboxes

A vehicle transmission actuating cylinder comprising:

• a first cylinder portion being defined by a connection plate (7), the connection plate (7) accommodating at least a portion of an actuating element for actuating at least one of a torque transmitting component and a transmission shift device;
• a second cylinder portion being defined by a transmission housing (5), the connection plate (7) being connected to the transmission housing (5) and the connection plate (7) and the transmission housing (5) together defining the actuating cylinder (3);
• a stop ring (10) being located within the actuating cylinder (3) integral with a first bushing-shaped expansion (10′) which extends into one of the first cylinder portion and the second cylinder portion;
• a piston (2) having a first surface communicating with the first bushing-shaped expansion (10′) for forming a first sealing contact surface;
• a second bushing-shaped expansion (10″) is integral with the stop ring (10) and extends into another of the first cylinder portion and the second cylinder portion;
• a second surface of the piston (2) communicates with the second bushing-shaped expansion (10″) for forming a second sealing contact surface;
• and
• the actuating element comprises a shift rod (1) which extends axially through the transmission housing (5) into the actuating cylinder (3), the actuating element is fixed to and biased by an interior bushing (4) of the piston (2), and the interior bushing (4) is sealably coupled to both the first bushing-shaped expansion (10′) and the second bushing-shaped expansion (10″).

A vehicle transmission actuating cylinder comprising:

• a first cylinder portion being defined by a connection plate (7), the connection plate (7) accommodating at least a portion of an actuating element for actuating at least one of a torque transmitting component and a transmission shift device;
• a second cylinder portion being defined by a transmission housing (5), the connection plate (7) being connected to the transmission housing (5) and the connection plate (7) and the transmission housing (5) together defining the actuating cylinder (3),
• a stop ring (10) being located within the actuating cylinder (3) integral with a first bushing-shaped expansion (10′) which extends into one of the first cylinder portion and the second cylinder portion;
• a piston (2) having a first surface communicating with the first bushing-shaped expansion (10′) for forming a first sealing contact surface;
• a second bushing-shaped expansion (10″) is integral with the stop ring (10) and extends into another of the first cylinder portion and the second cylinder portion;
• a second surface of the piston (2) communicates with the second bushing-shaped expansion (10″) for forming a second sealing contact surface;
• the stop ring (10) is located within the actuating cylinder (3) at the connection of the transmission housing (5) and the connection plate (7);
• and
• the actuating element comprises a shift rod (1) which extends axially through the transmission housing (5) into the actuating cylinder (3), the actuating element is fixed to and biased by an interior bushing (4) of the piston (2), and the interior bushing (4) is sealably coupled to both the first bushing-shaped expansion (10′) and the second bushing-shaped expansion (10″).