The invention relates to a trolley capable of automatically braking during downhill. The vehicle comprises a vehicle frame, a vehicle hopper and wheels, the vehicle hopper can be embedded in the vehicle frame in a front-back sliding mode, and a brake assembly, a push rod, a pull rope, a supporting frame and a transmission device are arranged at the bottom of the vehicle frame; the axle is sleeved with a fixing plate capable of rotating along with the axle when the vehicle speed reaches a preset value, the supporting frame is installed on the fixing plate, and each edge of the supporting frame is telescopic. The push rod is arranged on the frame in a front-back sliding mode, the pull rope is wound on the supporting frame, the rear end of the pull rope is fixed to the frame, the front end of the pull rope is connected with the push rod, the push rod pushes the brake assembly, and the transmission device is in transmission connection with the hopper and the supporting frame. In the initial state, the supporting frame is square, when the supporting frame rotates along with the fixing plate, the pull rope is intermittently pushed to conduct snub braking on the axle, when the car hopper slides forwards on the downhill road section, the transmission device acts, the two opposite sides of the supporting frame extend, the other two opposite sides are shortened to be rectangular, the braking force is increased, and the braking time is prolonged.

    本发明涉及一种下坡自刹车的手推车。其包括车架、车斗和车轮,车斗可前后滑动地嵌设在车架内,车架的底部设置有刹车组件、推杆、拉绳、支撑框架和传动装置;车轴上套设有在车速达到预设值时可随车轴转动的固定板,支撑框架安装于固定板,支撑框架的每条边均可伸缩;推杆可前后滑动的设置于车架,拉绳在支撑框架上缠绕且其后端固定于车架、前端连接推杆,推杆顶推刹车组件,传动装置传动连接车斗和支撑框架。初始状态支撑框架为正方形,支撑框架随固定板转动时,间歇式顶推拉绳对车轴进行点刹制动,在下坡路段车斗向前滑动时传动装置动作,使支撑框架两对边伸长、另外两对边缩短变为长方形,增大刹力度,延长制动时间。


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    Title :

    Downhill self-braking trolley


    Additional title:

    一种下坡自刹车的手推车


    Contributors:

    Publication date :

    2022-12-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B62B Von Hand bewegte Fahrzeuge, z.B. Handkarren oder Kinderwagen , HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS



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