The invention discloses an overload limit alarming device and relates to the technical field of manufacturing of hydraulic cranes and dragging winches. The overload limit alarming device comprises a pressure relay arranged in a hydraulic oil path, and a middle-position switch and a audible and visual alarming element which are arranged on an operation handle; a normally closed contact of the pressure relay is connected with a coil of a first relay; a normally closed contact of the first relay is connected with a coil of the second relay; and a normally closed contact of the second relay is connected with a coil of an ascending electromagnetic directional valve. By virtue of the overload limit alarming device, the problems that when the overload limit alarming device of the hydraulic crane has a fault, the maintenance time is long and the efficiency is low can be solved.
Overload limit alarming device
2015-05-27
Patent
Elektronische Ressource
Englisch
IPC: | B66C Krane , CRANES |
Public-transport-vehicle overload counting and alarming device
Europäisches Patentamt | 2015
|Abrasion limit alarming tire and producing method thereof
Europäisches Patentamt | 2019
|Train Approaching Alarming Device and Train Approaching Alarming Method
Europäisches Patentamt | 2018
|