Press fitting device for timing gear of engine balance shaft

Abstract

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.

Description

technical field [0001] The invention relates to a gear press-fitting device, in particular to a timing gear press-fitting device for an engine balance shaft, and belongs to the technical field of engines. Background technique [0002] In the working cycle of the engine, the movement speed of the piston is very fast and very uneven. At the top and bottom dead centers, the speed of the piston is zero, and the speed reaches the highest value at the middle of the top and bottom dead centers. Therefore, during the operation of the engine It will produce strong vibration, which not only affects the driving comfort of the vehicle, but also accelerates the aging process of various parts. In order to eliminate the above vibration, the designer installed a balance shaft mechanism for the engine. The balance shaft is a shaft with an eccentric weight, which uses the reverse vibration force generated by the eccentric weight to keep the engine in a good balance. The balance shaft is pow...

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Problems solved by technology

[0003] At present, the assembly of the balance shaft and the timing gear adopts the positioning method of adding a positioning key between the balance shaft and the timing gear. The timing angle is guaranteed by the manufacturing accuracy of the balance shaft and the timing gear, so that the balance shaft and the timing gear The production process is complicated, which increases the production cost of parts; in addition, due to the short production cycle of the press-fitting process of the balance shaft and timing gear, the utilization rate of the equipment is low, and the existing press-fitting equipment is generally designed for a certain type of product , the general performance is poor, so the manufacturing cost of the product is further increased

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