초록 ▼

A system and method for blocking a relative angular movement between a semi-trailer and a traction vehicle so as to limit the angular movement to a predetermined angle. A lock of a locking system in a guide plate is inserted in a central angle of a fifth wheel that supports the semi-trailer. The loc

A system and method for blocking a relative angular movement between a semi-trailer and a traction vehicle so as to limit the angular movement to a predetermined angle. A lock of a locking system in a guide plate is inserted in a central angle of a fifth wheel that supports the semi-trailer. The lock is electro-pneumatically actuated by an electric signal signifying brake actuation. This prevents an involuntary angular movement between the semi-trailer and the tractor from taking place mainly upon actuation of the brakes because of an imbalance occurring between friction forces acting on the tires.

대표청구항 ▼

A system for limiting relative angular movement between a traction vehicle and a semi-trailer, comprising: a locking element; locking means responsive to actuation of a vehicle brake for moving the locking element in a direction from an unlocking position at which said locking element is free of a f

A system for limiting relative angular movement between a traction vehicle and a semi-trailer, comprising: a locking element; locking means responsive to actuation of a vehicle brake for moving the locking element in a direction from an unlocking position at which said locking element is free of a fifth wheel of the traction vehicle to a locking position at which said locking elements blocks a path of relative angular movement of the fifth wheel with respect to the semi-trailer and thereby limits the relative angular movement attainable by the fifth wheel to within that of a blocking area defined by a relative blocking angle, said locking means including means for pivoting said locking element about a shaft to move between said unlocking and locking positions; returning means responsive to cessation of actuation of the vehicle brake of the traction vehicle for returning said locking element from said locking position to said unlocked position; and means for freeing said locking means of any adaptation to the traction vehicle, said freeing means including means for keeping said locking means supported by the semi-trailer, said locking element being arranged to be blocked against further movement in the same direction by the fifth wheel whenever the relative angular orientation between the traction vehicle and the semi-trailer is such that said further movement of the locking element in the same direction would otherwise cause the locking element to be in a position for blocking relative movement between the traction vehicle and the semi-trailer anywhere outside of said blocking area, whereby free realignment of the traction vehicle and semi-trailer may take place even if the vehicle brakes are actuated.