TRAILER-TRAIN COUPLING GEAR

FIELD: automotive industry. ^ SUBSTANCE: invention relates to ball-type coupling gears and it can be used for towing light-weight single-axle trailers. Proposed trailer-train coupling gear contains ball support with retainer pressed to support and arranged in housing. said coupling gear is provided with locking mechanism which cuts in piston and locks found in vertically arranged axial space of ball support. Locks are fitted in holes whose axes are arranged in one plane and plane of their arrangement coincides with diameter plane of ball support. Upper part of piston is made in form of conical surface. Locks are spring-loaded relative to ball support and are made for engagement by some ends with relatively perpendicular slots found on inner surface of lock housing and on surface of retainer. Device is furnished with hydraulic cylinder and hydraulic cylinder rod drive lever, piston-pusher with smaller diameter section in upper part to act onto said piston. Underpiston space of piston-pusher is connected with main line of prime-mover brake system. Device is provided with bracket of ball support to move support in direction of longitudinal axis of prime-mover with action of lower part of ball support onto hydraulic cylinder rod drive lever, with possibility of displacement of hydraulic cylinder rod and action of liquid pressure built, in said hydraulic onto piston to move the piston. ^ EFFECT: improved stability of trailer-train at application of brakes and prevention of jack-knifing of trailer in case of delayed operation or failure of main line connecting brake system of prime-mover and locking mechanism. ^ 3 dwg