Circumferential sealing mechanism for lower pressing plate of universal testing machine

Abstract

The invention discloses a circumferential sealing mechanism for a lower pressing plate of a universal testing machine, which comprises a metal inner cylinder, wherein the upper end of the metal innercylinder is fixed on the lower surface of the lower pressing plate, and a spacing I is reserved between the lower end of the metal inner cylinder and the upper surface of a testing machine platform. The circumferential sealing mechanism further comprises a rubber cylinder, wherein the upper end of the rubber cylinder is fixed on the lower surface of the lower pressing plate, the rubber cylinder sleeves the outer side of the metal inner cylinder, an annular space is formed between the metal inner cylinder and the rubber cylinder, a spacing II is reserved between the lower end of the rubber cylinder and the upper surface of the testing machine platform, a metal sealing cylinder is fixed on the upper surface of the testing machine platform, the upper end of the metal sealing cylinder sleevesthe rubber cylinder, and the inner wall of the metal sealing cylinder is in clearance fit with the outer wall of the rubber cylinder, an annular sealing groove is formed in the outer wall of the middle of the rubber cylinder, the upper end of the metal sealing cylinder is provided with an inclined sealing protruding part clamped into the annular sealing groove, and an elastic mechanism capable offorcing the lower end of the rubber cylinder to have the trend of expanding outwards in the radial direction is arranged between the outer wall of the lower end of the metal inner cylinder and the inner wall of the lower end of the rubber cylinder.

Description

technical field [0001] The invention belongs to the technical field of machinery, and in particular relates to a circumferential sealing mechanism of a lower pressing plate of a universal testing machine. Background technique [0002] In the field of testing, especially in the field of building materials, a universal testing machine is required. Since building materials are prone to produce waste materials such as scraps and dust during the testing process, the space set under the lower platen of the universal testing machine is easy to be waste. Accumulation requires regular cleaning of the space below the lower platen. At the same time, the gap between the shaft and the shaft hole connected to the lower platen is affected by the above-mentioned waste, which causes the shaft to be stuck, etc., which affects the installation and fixation of the next test piece. Contents of the invention [0003] The purpose of the present invention is to address the above problems and prov...

AI Technical Summary

Problems solved by technology

[0002] In the field of testing, especially in the field of building materials, a universal testing machine is required. Since building materials are prone to produce waste materials such as scraps and dust during the testing process, the space set under the lower platen of the universal testing machine is easy to be waste. Accumulation requires regular cleaning of the space below the lower platen. At the same time, the gap between the shaft and the shaft hole connected to the lower platen is affected by the above-mentioned waste, which causes the shaft to be stuck, etc., which affects the installation and fixation of the next test piece.

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