Stroke regulating type balance punch

The utility model discloses a stroke regulating type balance punch, which consists of an axis, a fixing ring, a sleeve cylinder, a ring pipe, an outer cylinder, an air cylinder, a balancing plate and a motor. An eccentric wheel implementing central axis is provided with a frame ring type gear. A ball is positioned under the axis. The ball is plug to a half concave positioned at a bottom of the sleeve cylinder. An end plane of the ball is covered by the fixing ring fastened positioned inside the cylinder. A framework ring is fixed and supported by a combination of the ring pipe and the sleeve cylinder. An upper die is locked by a lower end of the outer cylinder driven by an external frame ring type gear positioned on the ring pipe and engaged with a gear of a branch shaft of the motor, thereby providing a punching stroke regulation of two sections of distance of upper and lower. Bottom edge of the outer cylinder is profiled provided with a groove. The air cylinder is connected with a backside of the punch and positioned at a lower end of a corner block. The corner block is pivotally connected with a dovetail groove plate. A circular plate fixed by a plane of the corner block is pivotally connected with a screw rod. A bearing base sleeved and combined with the screw rod is plug and positioned inside a punching plate. A screw plate arranged on the screw rod is engaged and rotated with the motor gear. A bending end of the balancing plate is supported by an air cylinder shaft. A middle section of the balancing plate is provided a clamp inserted and fixed on a punching body, a front section is extended into the groove of the outer cylinder so as to form a lifting plate for operation of supporting, and the effects of regulation of the balance of the punching stroke and the reduction of the noise are achieved.