Swivel joint with wide swivel angle

Abstract

The invention relates to a swivel joint with a wide swivel angle. The swivel joint comprises a swivel body (1) and a swivel shaft (2), and is characterized in that the lower end of the swivel shaft (2) is axially inserted into the swivel body (1) from the upper end of the swivel body (1); the swivel shaft (2) is axially provided with a central oil discharge hole, six main oil path holes and a low-pressure oil path hole, wherein the upper-end opening of the central oil discharge hole extends out of the upper end of the swivel shaft (2), and the upper-end openings of the six main oil holes and the low-pressure oil hole extend out of the sidewall of the upper part of the swivel shaft (2); and six main oil ports and one low-pressure oil port are radially arranged on the swivel body (1) to be correspondingly communicated with the six main oil holes and the low-pressure oil hole on the swivel shaft (2) one by one. According to the swivel joint with the wide swivel angle, the interference among pipelines is avoided. In addition, the swivel joint with the wide swivel angle is quite convenient to operate and maintain.

Description

technical field [0001] The invention relates to a rotary joint with a large rotary angle, which is mainly used in the hydraulic systems of large-tonnage excavators, cranes, graders, tower cranes and other machinery, and is a hydraulic pipeline connecting the fixed part and the rotating part of the entire hydraulic system and circuit. and circuit connections. Background technique [0002] For hydraulic excavators, cranes, loaders, etc., the upper and lower parts need to be rotated, so there is a problem of connecting the oil circuit and the circuit between the rotating part and the fixed part. The rotary joint is composed of a rotary body, a rotary shaft and a cover. When in use, the revolving body is fixed to the revolving lower platform of hydraulic excavators and cranes, and the mounting plate on the revolving shaft is connected with the slewing support on the revolving upper platform. Hydraulic rubber hoses and wires are respectively installed on the oil ports and lines...

AI Technical Summary

Problems solved by technology

[0003] However, after the conventional swivel joints connect the hydraulic pipelines and circuits of the fixed part and the rotating part in the hydraulic system and the circuit, the relative rotation angle of the fixed part and the rotating part is generally 50° to 80°, and the rotation angle is small, so the operation and maintenance are not easy. Convenience, and interference between pipelines is easy to occur, resulting in short pipeline life

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