| 摘要 |
A trailer hitch for heavy vehicles has a coupling housing arranged on the traction vehicle with a rear, vertical end piece from which extends an upper, forward protruding coupling yoke piece and a lower, forward protruding coupling yoke piece, between which a tow eye on a trailer and a tow ball arranged in the tow eye are intended to be secured by means of a coupling pin running through a hole in the tow ball. A principally vertical wedge (12) is arranged between both coupling yoke pieces (3, 4) in front of the rear end piece (2) and is so designed that the wedging action increases, i.e. the force of the wedge increases, as the wedge is pressed down. An intermediate piece (14), equipped partly with an upper, forward protruding part (15) and partly a lower, forward protruding part (17), is arranged between the wedge (12) and the tow ball (6), whereby the parts are intended to abut against an upper (16) and a lower (18) part of the tow ball. The wedge (12) exhibits a spring device (13) acting on its top and intending to press down the wedge.
|
