GB538216A - Coupling fitted with synchronizing gear, especially for the change-speed gears of motor vehicles - Google Patents

Abstract

538,216. Friction and claw clutches. GANZ & CO., Ltd. April 9, 1940, No. 6404. Convention date, April 14, 1939. [Class 80 (ii)] Relates to positive clutches the members of which are synchronized by a coil friction clutch brought into action by a second friction clutch, which is of conical form. The positive clutch comprises teeth 15 on a gear-wheel 9, which can be engaged by teeth 16 on a sliding coupling- member 2 splined on a shaft 1. Rods 4, slidably mounted on the shaft are detachably connected by spring-pressed balls 6 to the coupling-member, so as to move therewith. Movement of the coupling-member by a fork 3 in a direction to engage the clutch causes the rods 4 to displace a conical spring-pressed clutch-member 7, which is splined on the shaft, into engagement with a conical surface on a sleeve 10, which is rotatably mounted within the gear-wheel. Inside the sleeve is mounted a coil spring 11 having at its ends upturned portions 12, which project through an aperture in the sleeve and into a recess 13 in the gear-wheel. The rotation imparted to the sleeve by the conical member 7 forces the upturned ends of the spring 11 towards each other, so that the spring grips the shaft and frictionally connects it to the gear-wheel. Further movement of the coupling-member causes engagement of the clutch teeth 15, 16. The resistance offered by the member 7 to the rods 4 forces the balls 6 from their seats in the rods, so that the coneclutch is disengaged by its spring. The coil spring 11 may be arranged to act by expansion instead of contraction, so that it grips the inside of the hub of the gear-wheel.