Automatic tensioning oil cylinder

Abstract

The invention relates to an automatic tensioning oil cylinder, which is characterized in that the automatic tensioning oil cylinder comprises an underframe (1), a cylinder body (2) is arranged on the underframe (1), a pull rod (4) is installed at the bottom end of the cylinder body (2), the pull rod (4) is fixedly arranged on the cylinder body (2) through a nut (5), a handle (3) is installed at the top end of the cylinder body (2), the handle (3) is T-shaped, an oil filling valve (6) is arranged on the side surface of the handle (3), the oil filling cylinder (6) is communicated with the internal part of the cylinder body (2), a spring (8) is installed on the outer wall of the cylinder body (2), the bottom of the spring (8) is placed on the underframe (1), a spring cover (7) is arranged at the top of the spring (8) and the spring cover (7) is fixedly arranged on the outer wall of the cylinder body (2). The automatic tensioning oil cylinder has the advantages that the spring outside the cylinder body can provide certain pre-tensioning force to the caterpillar track, the tension degree of the caterpillar track can be automatically adjusted through the spring, the structure is simple, the safety and the reliability are high and the automatic tensioning oil cylinder is convenient to refit.

Description

Technical field [0001] The invention relates to an automatic tensioning oil cylinder, which is mainly used in the walking mechanism of a crawler excavator. Background technique [0002] Crawler excavators have the advantages of large traction, strong climbing ability, and small turning radius, so they have been widely used in engineering construction and mine development. The tensioning device in the crawler excavator plays an extremely important role. The usual crawler excavator uses a tensioning cylinder as its tensioning device. However, the previous tensioning cylinder will keep the track in a tight state at all times. In the tightened state, its service life will be reduced, so it is often necessary to manually adjust the tightening cylinder, which increases the operating intensity. Summary of the invention [0003] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide an automatic tensioning oil cylinder which can prolong the servi...

AI Technical Summary

Problems solved by technology

The tensioning device plays an extremely important role in the crawler excavator. The usual crawler excavator uses the tensioning cylinder as its tensioning device. However, the previous tensioning cylinder will keep the track in a tensioned state at all times. Being in a tensioned state will reduce its service life, so it is often necessary to manually adjust the tensioning cylinder, which increases the operating strength

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