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[CN 201820690276.0] Central feeding device of hydraulic press
[CN 201820690276.0] Title of central punching device of hydraulic press: Application number of central punching device of hydraulic press: CN 201820690276.0 Applicant: Jiangsu Guoli Forging Machine Tool Co., Ltd. Application Date: 2018-5-10 Patent Type: Utility Model The utility model relates to a central punching device of hydraulic press, including a master cylinder located above the slider, the lower end of the piston rod of the master cylinder is fixedly connected to the top center of the slider, and the slider at the top center of the slider is provided with a counterbore, the bottom of the sliding block counterbore is provided with a sliding block punching hole penetrating the sliding block; the center of the lower end face of the master cylinder piston rod is provided with a punching plunger cylinder body extending upward, the inner cavity of the punching plunger cylinder body is provided with a punching plunger, the lower end of the master cylinder piston rod is fixed with a plunger cylinder head located in the sliding block counterbore, and the lower end of the punching plunger extends from the central hole of the plunger cylinder head and is inserted into the sliding block; A spring is supported between the center of the upper end surface of the plunger cylinder head and the step of the big end of the charging plunger; the oil injection cavity of the plunger cylinder body at the upper end of the charging plunger cylinder body is connected with the oil injection port of the plunger cylinder through the internal hole, and the oil injection port of the plunger cylinder is located on the lower side wall of the piston rod of the master cylinder. The device has simple structure, small processing workload and low precision requirements, simplifies hydraulic pipelines, and saves manufacturing costs.
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