The utility model relates to a trolley brake device, which is mainly composed of a trolley, a linkage-actuated braking device and a pair of trolley link assemblies； the trolley has a carrying platform, a handle and four free wheels adjacent to the handle The two freewheels are provided with a perforation in the central axis； the brake device is actuated by a lifting rod at each of the two ends of the crossbar to connect the perforating movement to pivot the block of the freewheel； the double tie rod When the group is moved by a double-type connecting rod for reciprocating linear lifting movement, the vertical rod synchronizes the straightening rod and the horizontal rod to reciprocate linear lifting movement, so that the horizontal rod drives the lifting rods on the two outer sides respectively, and the linkage rod The brake sway block is actuated in a synchronous manner to release pressure or apply pressure to the free wheel.一種推車剎車裝置，主要係由一推車、一連桿作動的制動裝置以及一雙拉桿連桿組所構成；該推車其具有一承載平台、一把手以及四自由輪，於鄰近該把手的二自由輪其中心軸設置有一穿孔；該連桿作動的制動裝置係由一橫桿二端各設置一升降拉桿以連通該穿孔活動樞接該自由輪之該煞車搖擺塊；該雙拉桿連桿組係由一複式連桿作往復的直線升降運動時，該垂直桿同步該調平桿與該橫桿作往復的直線升降運動，使該橫桿分別帶動兩外側之該升降拉桿，而連動該煞車搖擺塊同步升降作動以釋放壓力或施加壓力於該自由輪上。
