Press fitting device for timing gear of engine balance shaft

The invention discloses a press fitting device for a timing gear of an engine balance shaft. The press fitting device comprises a main body framework, a press fitting oil cylinder, a press fitting execution mechanism, a following mechanism, a gear positioning mechanism, a balance shaft positioning mechanism and a PLC (Programmable Logic Controller) control system, wherein the main body framework consists of an upper cover plate, an upright post, a base plate and a bracket; the press fitting oil cylinder is fixed on the upper cover plate of the main body framework; a telescopic rod of the press fitting oil cylinder and the press fitting execution mechanism are assembled; the press fitting execution mechanism and the upper end of the following mechanism are fixedly assembled; the lower end of the following mechanism and the balance shaft positioning mechanism are assembled; the balance shaft positioning mechanism and the gear positioning mechanism are respectively matched with the base plate of the main body framework. The press fitting device disclosed by the invention has the characteristics of simple structure, high automatic degree and high generality; the requirement on timing angle when the balance shaft and the timing gear are assembled is met; besides, the working efficiency is improved, and the production cost is reduced.