On January 7, the "independent control unit for back-up buzzer" declared by Yuchai Heavy Industry Company Limited (YHI) won a patent for invention from the State Intellectual Property Office.
Back-up buzzer control units installed on mechanical excavators have always used the structure of fuel line control: install a fuel line inductor at the control outlet of the running fuel line of the multi-tandem valve, and create back-up buzzing signals through the induction of the fuel line, to produce the effect of back-up buzzing. This back-up buzzer control unit is structurally complex and hard to maintain.
To improve the situation, YHI invented an independent control unit for back-up buzzer. In the form of current control, the unit can not only simplify the structure of the back-up buzzer control system, but also ensure the buzzer's sensitivity. The unit has advantages such as sensitive buzzing, simple structure, low manufacturing cost, stable performance, long useful life and wide application.