Brake actuator with centering dome in service chamber

Details Brake actuator with centering dome in service chamber Brake actuator with centering dome in service chamber

F - Mech Eng,Light,Heat,Weapons

16

D

F16D 65/28 (2006.01) B60T 17/08 (2006.01) F16D 65/32 (2006.01)

Patent

CA 2228508

An improved spring brake actuator includes a dome (42) extending into the service chamber (36) from the center housing (32). The spring chamber push rod (22) is formed with a plate (40) having a cross section corresponding to the dome (42). The service chamber diaphragm (38) as well as the service chamber piston (46) are also formed with surfaces that correspond to the shape of the dome (42). The surfaces "stack up" to ensure alignment between the spring chamber push rod (22) and the service chamber push rod (49). The use of the dome (42) also provides additional stroke to the spring chamber push rod (49) without requiring additional axial length for the overall brake actuator.

Cylindre de frein à ressort accumulateur perfectionné, qui comporte un dôme (42) s'étendant dans la chambre de fonctionnement (36) depuis le logement central (32). La tige-poussoir (22) de chambre de ressort est équipée d'une plaque (40) dont la section transversale correspond au dôme (42). Le diaphragme (38) de la chambre de fonctionnement ainsi que le piston (46) de la chambre de fonctionnement sont également dotés de surfaces qui correspondent à la forme du dôme (42). Les surfaces "s'empilent" pour garantir l'alignement entre la tige-poussoir (22) de la chambre de ressort et la tige-poussoir (49) de la chambre de fonctionnement. L'utilisation du dôme (42) fournit également un supplément de course à la tige-poussoir (49) de la chambre de ressort sans que la longueur axiale de l'ensemble cylindre de frein s'en trouve augmentée.

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