Inner jacking device of press machine workbench

Abstract

The invention relates to an inner jacking device of a press machine workbench. The inner jacking device comprises a vertically arranged hydraulic cylinder, and the hydraulic cylinder comprises a cylinder body, a piston and a lower end cover; the cylinder body is of a two-section structure; an antifouling retaining shoulder is arranged between a cylinder body upper section and a cylinder body lowersection; a guide block is arranged at the end part of a piston rod at the upper part of the piston, and is matched with the cylinder body upper section; a piston body at the lower part of the pistonis matched with the cylinder body lower section; an annular groove of which the opening is upward is formed in the antifouling retaining shoulder; the annular groove communicates with sewage drainingexits in the cylinder body; the center of the guide block and the center of the piston rod are matched with a counterbore through a bolt, axial connection is achieved, and the guide block and the piston are in semi-floating connection; and a seal ring is further arranged between matching surfaces of the piston body and the cylinder body lower section. The inner jacking device has good capacities of resisting bias load and preventing external oil and impurities from entering the cylinder body, and is simple and compact in structure and long in service life.

Description

technical field [0001] The invention belongs to the technical field of press equipment for auto parts processing, and in particular relates to an inner jacking device for a press workbench. Background technique [0002] The presses used in the processing and stamping of auto parts are relatively large in size and weight. Generally, the worktable of the press is set on the inner guide rail plate of the press to facilitate the movement and reversing of the worktable. The inner jacking cylinder of the workbench is installed on the base of the inner guide rail of the press, which is flush with the ground, and its main function is to complete the lifting of the workbench in the machine to realize the switch of the workbench. The working requirements of the jacking cylinder are low speed, heavy load and sensitive action. Due to the fact that there are a lot of dust and impurity particles on the ground in the actual working environment, during the use process, the dust and particl...

AI Technical Summary

Problems solved by technology

[0005] The invention designs an inner jacking device of the press workbench, which solves the problem of poor working performance of the jacking cylinder in the traditional machine, the easy wear and tear of the piston seal ring caused by the immersion of external impurities, and the oil leakage of the piston seal and the wear and tear of the cylinder body under the action of partial load Even the problem of failure

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