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Crane bumper function and working principle
- Jan 22, 2019 -

Crane bumper is a small but very important safety device for overhead cranes and hoist trolleys . It effectively protects the overhead crane and hoist trolley running within safety track range .

If the crane end carriages (or hoist traveling trolley ) of a single crane accidentally rushes to the end of the track stroke, the bumper can interact with the track end stop (another safety device) at the same level. If on the same span track, when two cranes collide, they act on the bumpers located on the opposite side of the metal structure of two cranes. The damper rapidly transforms the kinetic energy of the collision into the absorption of elastic potential energy, thereby reducing the impact of the collision force and avoiding damage to the overhead crane. Commonly used are rubber bumpers, spring buffers and hydraulic bumpers .

When the running mechanical position limiter or brake device fails, due to inertia, the crane or hoist trolley that runs to the end will collide with the set stop at the end of the run. The purpose of the buffer is to absorb the running function of the crane or the lifting trolley to mitigate the impact. The damper is placed at a position where the crane or hoisting trolley collides with the stopper body. A buffer should also be provided between cranes running on the same track and between two hoist trolleys on the same bridge.