Swivel Joint Sensor Layout for Easier Swing Angle Maintenance
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Solution Overview
Problem
Conventional swivel joints in construction machines require separate bending joints and complex component removal for maintenance, making it difficult to access and maintain the swing sensor detecting relative rotation between the upper and lower bodies.
Innovation Solution
A swivel joint with a sensor system that includes a rotation support body, a detector, and a relative detector, where the sensor is integrated into the swivel joint to detect the relative rotation angle between the upper and lower bodies, allowing for easier maintenance by decoupling the guide pipe and securing bracket for access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the swing sensor is installed at the rotation portion to detect relative rotation angle, then the detection function is achieved, but maintenance becomes difficult requiring removal of other components
Solution Approach 1:
The sensor system is divided into two independent parts: a detector mounted on the rotating upper body and a relative detector mounted on the stationary lower body. This segmentation allows the detector to rotate with the upper body while the relative detector remains stationary and easily accessible for maintenance, resolving the contradiction between detection functionality and maintenance accessibility.
2Reliability
If separate bending joints are used to connect hydraulic lines, then hydraulic connection is achieved, but device complexity increases
Solution Approach 1:
The detector is integrated with the swivel joint structure, merging the sensing function with the hydraulic connection system. This eliminates the need for separate bending joints and connecting members, reducing device complexity while maintaining reliable hydraulic line connection through the integrated design.
Data Source
AI summary
Embodiments of the present disclosure may be directed to a swivel joint for connecting hydraulic oil between a lower body of a construction machine and an upper body rotatably supported by the lower body, the swivel joint including: a rotation support body including a first body supported by the lower body and a second body rotatably coupled to the first body and rotating together with the upper body when the upper body rotates; and a sensor supported by the rotation support body to detect rotation of the upper body.