Coupling balls retaining device for use in agricultural tractor, has stoppers which surround balls and/or adapter unit with its area that is away from rear wall, where area of adapter unit lies under effect of force at stoppers

摘要

The mechanism has coupling balls of different categories in an attachment that is provided with a through running bore hole. A retainer and an adapter unit accommodate the balls of categories, respectively. Two lateral stoppers (4) surround the balls and/or the unit with its area that is away from a rear wall (3), so as to push the ball in a normal way, where an area of the unit lies under the effect of force at the stoppers.