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    • 3. 发明授权
    • Automatic safety brake actuation tongue for towed vehicles
    • 用于拖车的自动安全制动器致动舌
    • US4453620A
    • 1984-06-12
    • US357883
    • 1982-03-15
    • William G. AngusRichard D. RatheDaniel J. Fox
    • William G. AngusRichard D. RatheDaniel J. Fox
    • B60T7/20
    • B60T7/20
    • A tongue is provided for a towed wagon having conventional variable hydraulic and emergency brake systems. The tongue has three telescopically disposed tubes with a clevis on the outer tube for connection to a drawbar. A slide member is moved in said outer tube by a connected drawbar. The slide member has a cam which engages a spring loaded plunger which engages a latch on the intermediate tube to lock the outer and intermediate tubes together. The connected drawbar also moves the outer and intermediate tubes with respect to each other before they are locked together. This relative movement causes an emergency brake control means to be released, and moves to its breaking position only when the drawbar is disconnected. A surge brake mechanism is interconnected between the intermediate and inner tubes to operate the variable hydraulic brake system of the vehicle as the inner tube moves forwardly over the intermediate tube.
    • 为具有常规可变液压和紧急制动系统的拖车提供舌头。 舌头有三个伸缩式管子,外管上有U形夹,用于连接到牵引杆。 滑动构件通过连接的牵引杆在所述外管中移动。 滑动构件具有与弹簧加载的柱塞接合的凸轮,该弹簧与中间管上的闩锁接合,以将外管和中间管锁定在一起。 连接的牵引杆在将它们锁定在一起之前也可以相对于彼此移动外管和中间管。 这种相对运动导致紧急制动控制装置被释放,并且仅在牵引杆断开时才移动到其断开位置。 当内管向中间管移动时,缓冲制动机构在中间管和内管之间互连,以操作车辆的可变液压制动系统。