Center rotating joint provided with angle sensor

Abstract

The invention discloses a center rotating joint provided with an angle sensor. The center rotating joint comprises a rotating body, a rotating shaft and an end cover. An angle sensor mounting ring isarranged at the connecting portion of the rotating body and the end cover. An annular groove is formed in an inner ring of the angle sensor mounting ring. An angle signal transmitting device and an angle signal receiving device are correspondingly arranged on two opposite annular faces in the annular groove. A rotating disc connected with the rotating shaft is arranged between the angle signal transmitting device and the angle signal receiving device. A through hole or an opening groove corresponding to the angle signal transmitting device and the angle signal receiving device in position is formed in the rotating disc. The angle signal transmitting device and the angle signal receiving device are connected with a controller. The center rotating joint provided with the angle sensor has thebeneficial effects of being simple in structure, convenient and fast to use, stable and reliable in work, convenient to maintain, low in machining and manufacturing cost and the like.

Description

technical field [0001] The invention relates to the technical field of hydraulic rotary joints, in particular to a central rotary joint provided with an angle sensor. Background technique [0002] The excavator includes an upper platform and a lower frame, and the upper platform is slewably mounted on the lower frame. The power system of the excavator and the oil tank, pump and control valve in the hydraulic system are installed on the upper platform. Hydraulic actuators such as a hydraulic motor for traveling and a bulldozing blade lifting cylinder are installed on the lower frame. Due to the relative rotation of the upper platform and the lower frame, the hydraulic actuators installed on the lower frame need to be connected with the hydraulic components on the upper platform through the rotary center joint. [0003] The existing slewing center joint includes a central joint body and a mandrel. The central joint body is sleeved on the lower part of the mandrel. When insta...

AI Technical Summary

Problems solved by technology

[0006] In the installation method of the above-mentioned rotary center joint, the middle slender shaft needs to have better structural strength due to the longer shaft, and also requires higher machining accuracy. The cover plate is fixed, and there is oil in the channel of the slender shaft, so the slender shaft is suspended in the middle oil channel, so there may be deflection during the rotation process, and the rotation angle cannot be truly reflected

In addition, since the slender shaft occupies the oil passage space of the middle oil passage, the flow area will be reduced, the back pressure of the oil passage will increase, and the oil drainage of the traveling motor will be poor.

[0007] Existing angle sensors installed on the central rotary joint have different degrees of complex structures, poor reliability, low measurement accuracy, and inconvenient maintenance.

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