Press mounting device for hinge pins of speed regulating gears of general purpose small gasoline engines

The utility model discloses a press mounting device for hinge pins of speed regulating gears of general purpose small gasoline engines, which comprises a workpiece clamping tool, a support structure and a fluid pressure cylinder. The support structure is used for supporting a hinge pin, the fluid pressure cylinder is controlled by a control system, and a piston rod of the fluid pressure cylinder pushes and presses the hinge pin to assemble a gear and a counterweight. Preferably, the support structure consists of a support, a replaceable support is disposed on the support, a semicircular groove for supporting a pin rod portion of the hinge pin is arranged on the replaceable support, the replaceable support is in vertical sliding fit with the support, an elastic element is connected between the lower end of the replaceable support and the support, limiting stoppers are disposed at upper ends of two sides of the replaceable support, and a push-and-press component is sleeved on the piston rod. When the hinge pin is pushed and pressed by the piston rod by a certain distance, the push-and-press component gradually presses the replaceable support downwards, and after the replaceable support is downwards pressed to a set position, the push-and-press component stops moving and slides relative to the piston rod. The press mounting device has the advantages that the press mounting device is high in production efficiency, simple in structure, low in manufacture and use cost and long in service life, and hidden dangers that workpieces are knocked and damaged are avoided.