Hydraulic slewing connector with large slewing angle

Abstract

The invention relates to a hydraulic slewing connector with a large slewing angle. The hydraulic slewing joint comprises a slewing body (1) and a slewing shaft (2). The hydraulic slewing connector is characterized in that the lower end of the slewing shaft (2) is axially inserted inside the slewing body (1) from the upper end of the slewing body (1), a central oil discharge hole, six main oil way holes and a low-pressure oil way hole are formed in the slewing shaft (2) axially, a rotary seal ring (7), an O-shaped ring II (8) and a dust-proof ring (9) are arranged inside an annular groove between the slewing body (1) and the slewing shaft (2), two lip mouths (9.1) up and down are formed on one side, contacting with the slewing shaft (2), of the dust-proof ring (9) to form double lip mouths, and both the two lip mouths (9.1) up and down are tightly attached to the outer wall of the slewing shaft (2). The hydraulic slewing connector with the large slewing angle has the advantages that dust cannot enter easily, oil cannot leak out easily, interference cannot happen among pipelines, and operation and maintenance are very convenient.

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. A connecting piece with a circuit belongs to the technical field of engineering machinery. 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 hos...

AI Technical Summary

Problems solved by technology

[0003] However, the sealing performance between the rotary joint and the outside world in the past is poor, and the dust from the outside is easy to get into the rotary joint, which affects the performance of the rotary joint, and the oil in the rotary joint is also easy to leak out. The rotation also has an impact, requiring frequent oiling, which increases the labor intensity of the workers

[0004] Moreover, after the conventional rotary joint is connected to the hydraulic pipeline and the circuit 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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